The continuous research in the area of renewable energy technology to substitute the unsustainable nature of fossil
fuel in terms of it future availability and negative environmental impact created by fossil fuel has ensure the explore
of solar energy as a good alternative. Dye sensitized solar cells (DSSCs) serve to be a good alternative means of
producing photovoltaic solar cell. This work reports the working principle and construction process of dye-sensitized
solar cell. A synthesized dye (Ruthenium oxide) and an iodide electrolyte were used for better performance based on
already researched work. Also, this work reports the evaluation process with results recorded by the produced solar
cell within 6:00am (GMT) and 6:00pm (GMT) for selected days. The results from the evaluation process show a
better performance of a dye-sensitized solar cell in low and normal sunny day. The solar cell has a good performance
at 12:00noon with a 0.5V output.
Done by Group: Golden
School: Al Wakra Independent School for Girls
Dye-Sensitized Solar Cells (DSSC) Module: The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
The project consists of two parts, one of them is improving DSSC (They used different dyes) and the other part is an idea about application on the traffic lights.
Done by Group: Wakrag_black8
School: Al Wakra Independent School for Girls
Dye-Sensitized Solar Cells (DSSC) Module: The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
The project consists of using two dyes. Then, it demonstrates the ides of powering the cameras using theses dyes,
Bathochromic shift in photo-absorption spectra of organic dye sensitizers thr...Narges Mohamadi
Contributed Talks at Australian Institute of Physics 20th National Congress (under the theme of Energy, Energy Materials and Energy Systems), December 2012, Sydney
The growth and assembly of organic molecules and inorganic 2D materials on gr...Akinola Oyedele
The unique properties of graphene have made it a promising material for integration in future electronic applications. The idealized surface of graphene, atomically-flat and without dangling bonds, offers the opportunity to understand the assembly of organic and inorganic molecules to form a wide range of ordered architectures and functional graphene-based heterostructures. In this review, we summarize recent progress in the growth of hierarchical nanostructures on graphene. The self-assembly of organic molecules and inorganic two-dimensional (2D) layers on graphene for the construction of various types of heterostructures are highlighted. Van der Waals interactions between the assembled molecules and graphene are shown to allow the formation of highly-ordered structures with preferred molecular orientations and stacking configurations that circumvent the strict lattice-matching requirements in traditional epitaxial growth. Finally, we briefly discuss representative applications of graphene-based heterostructures in electronic and optoelectronics.
Recent progress in non platinum counter electrode materials for dye sensitize...Science Padayatchi
Dye-sensitized solar cells (DSSCs) have gained increasing attention
with regard to photovoltaic devices, because of their low
cost and simple fabrication methods; they are mostly investigated
in indoor light-harvesting and portable applications. The
focus has been on three main parameters of photovoltaic devices,
that is, lifetime, and cost effectiveness. A DSSC consists of
four prominent components including a photoanode, a photosensitizer,
a redox electrolyte, and a counter electrode. The
counter electrode is a crucial component, in which triiodide is
reduced to iodide by electrons flowing through the external
circuit. An effective approach to improve the performance of
a counter electrode is to enhance the power conversion efficiency
and to reduce the cost of the device. Platinum-coated
conducting glass electrodes give the best performance, but
their high cost and the scarcity of platinum restricts large-scale
application in DSSCs. This has prompted researchers to develop
low-costing platinum-free electrodes for DSSCs. In this
review, we focus mainly on counter electrode materials for the
electrocatalytic redox reaction for the I¢/I¢
3 electrolyte, and
apart from this, other counter electrode materials for iodinefree
redox electrolytes are discussed. Different counter electrode
materials are highlighted in different categories such as
carbon materials, conducting polymers, oxide and sulfide materials,
transition-metal nitrides and carbides, and composite
materials. The stability of counter electrodes in DSSCs is also
presented.
Recent progress in non platinum counter electrode materials for dye sensitize...Science Padayatchi
Dye-sensitized solar cells (DSSCs) have gained increasing attention
with regard to photovoltaic devices, because of their low
cost and simple fabrication methods; they are mostly investigated
in indoor light-harvesting and portable applications. The
focus has been on three main parameters of photovoltaic devices,
that is, lifetime, and cost effectiveness. A DSSC consists of
four prominent components including a photoanode, a photosensitizer,
a redox electrolyte, and a counter electrode. The
counter electrode is a crucial component, in which triiodide is
reduced to iodide by electrons flowing through the external
circuit. An effective approach to improve the performance of
a counter electrode is to enhance the power conversion efficiency
and to reduce the cost of the device. Platinum-coated
conducting glass electrodes give the best performance, but
their high cost and the scarcity of platinum restricts large-scale
application in DSSCs. This has prompted researchers to develop
low-costing platinum-free electrodes for DSSCs. In this
review, we focus mainly on counter electrode materials for the
electrocatalytic redox reaction for the I¢/I¢
3 electrolyte, and
apart from this, other counter electrode materials for iodinefree
redox electrolytes are discussed. Different counter electrode
materials are highlighted in different categories such as
carbon materials, conducting polymers, oxide and sulfide materials,
transition-metal nitrides and carbides, and composite
materials. The stability of counter electrodes in DSSCs is also
presented.
This paper presents a Dye sensitized solar cell (DYSSC), which is called as future generation solar cell. It is a
new class of green photovoltaic cell based on photosynthesis principle in nature. DYSSCs are fabricated using
two different natural dyes as sensitizers, which extracted from the materials existing in nature and our life, such
as flowers, leaves, fruits, traditional Chinese medicines, and beverages. The use of sensitizers having a broad
absorption band in conjunction with oxide films of nanocrystalline morphology permits to harvest a large
fraction of sunlight. There are good prospects to produce these cells at lower cost and much better efficiency
than conventional semiconductor devices by introducing various chemical and natural dyes. DYSSC are
implemented with simple and new technique to overcome the energy crisis and excess cost of semiconductor
solar cells.
Done by Group: Golden
School: Al Wakra Independent School for Girls
Dye-Sensitized Solar Cells (DSSC) Module: The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
The project consists of two parts, one of them is improving DSSC (They used different dyes) and the other part is an idea about application on the traffic lights.
Done by Group: Wakrag_black8
School: Al Wakra Independent School for Girls
Dye-Sensitized Solar Cells (DSSC) Module: The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
The project consists of using two dyes. Then, it demonstrates the ides of powering the cameras using theses dyes,
Bathochromic shift in photo-absorption spectra of organic dye sensitizers thr...Narges Mohamadi
Contributed Talks at Australian Institute of Physics 20th National Congress (under the theme of Energy, Energy Materials and Energy Systems), December 2012, Sydney
The growth and assembly of organic molecules and inorganic 2D materials on gr...Akinola Oyedele
The unique properties of graphene have made it a promising material for integration in future electronic applications. The idealized surface of graphene, atomically-flat and without dangling bonds, offers the opportunity to understand the assembly of organic and inorganic molecules to form a wide range of ordered architectures and functional graphene-based heterostructures. In this review, we summarize recent progress in the growth of hierarchical nanostructures on graphene. The self-assembly of organic molecules and inorganic two-dimensional (2D) layers on graphene for the construction of various types of heterostructures are highlighted. Van der Waals interactions between the assembled molecules and graphene are shown to allow the formation of highly-ordered structures with preferred molecular orientations and stacking configurations that circumvent the strict lattice-matching requirements in traditional epitaxial growth. Finally, we briefly discuss representative applications of graphene-based heterostructures in electronic and optoelectronics.
Recent progress in non platinum counter electrode materials for dye sensitize...Science Padayatchi
Dye-sensitized solar cells (DSSCs) have gained increasing attention
with regard to photovoltaic devices, because of their low
cost and simple fabrication methods; they are mostly investigated
in indoor light-harvesting and portable applications. The
focus has been on three main parameters of photovoltaic devices,
that is, lifetime, and cost effectiveness. A DSSC consists of
four prominent components including a photoanode, a photosensitizer,
a redox electrolyte, and a counter electrode. The
counter electrode is a crucial component, in which triiodide is
reduced to iodide by electrons flowing through the external
circuit. An effective approach to improve the performance of
a counter electrode is to enhance the power conversion efficiency
and to reduce the cost of the device. Platinum-coated
conducting glass electrodes give the best performance, but
their high cost and the scarcity of platinum restricts large-scale
application in DSSCs. This has prompted researchers to develop
low-costing platinum-free electrodes for DSSCs. In this
review, we focus mainly on counter electrode materials for the
electrocatalytic redox reaction for the I¢/I¢
3 electrolyte, and
apart from this, other counter electrode materials for iodinefree
redox electrolytes are discussed. Different counter electrode
materials are highlighted in different categories such as
carbon materials, conducting polymers, oxide and sulfide materials,
transition-metal nitrides and carbides, and composite
materials. The stability of counter electrodes in DSSCs is also
presented.
Recent progress in non platinum counter electrode materials for dye sensitize...Science Padayatchi
Dye-sensitized solar cells (DSSCs) have gained increasing attention
with regard to photovoltaic devices, because of their low
cost and simple fabrication methods; they are mostly investigated
in indoor light-harvesting and portable applications. The
focus has been on three main parameters of photovoltaic devices,
that is, lifetime, and cost effectiveness. A DSSC consists of
four prominent components including a photoanode, a photosensitizer,
a redox electrolyte, and a counter electrode. The
counter electrode is a crucial component, in which triiodide is
reduced to iodide by electrons flowing through the external
circuit. An effective approach to improve the performance of
a counter electrode is to enhance the power conversion efficiency
and to reduce the cost of the device. Platinum-coated
conducting glass electrodes give the best performance, but
their high cost and the scarcity of platinum restricts large-scale
application in DSSCs. This has prompted researchers to develop
low-costing platinum-free electrodes for DSSCs. In this
review, we focus mainly on counter electrode materials for the
electrocatalytic redox reaction for the I¢/I¢
3 electrolyte, and
apart from this, other counter electrode materials for iodinefree
redox electrolytes are discussed. Different counter electrode
materials are highlighted in different categories such as
carbon materials, conducting polymers, oxide and sulfide materials,
transition-metal nitrides and carbides, and composite
materials. The stability of counter electrodes in DSSCs is also
presented.
This paper presents a Dye sensitized solar cell (DYSSC), which is called as future generation solar cell. It is a
new class of green photovoltaic cell based on photosynthesis principle in nature. DYSSCs are fabricated using
two different natural dyes as sensitizers, which extracted from the materials existing in nature and our life, such
as flowers, leaves, fruits, traditional Chinese medicines, and beverages. The use of sensitizers having a broad
absorption band in conjunction with oxide films of nanocrystalline morphology permits to harvest a large
fraction of sunlight. There are good prospects to produce these cells at lower cost and much better efficiency
than conventional semiconductor devices by introducing various chemical and natural dyes. DYSSC are
implemented with simple and new technique to overcome the energy crisis and excess cost of semiconductor
solar cells.
introduction to DSSC, Principle and working of DSSC,Component involved in DSSC, how does DSSC work?,Advantage and disadvantage of DSSC, application of DSSC.
Electron Injection Kinetics in Dye-Sensitized Solar CellsChelsey Crosse
Overview of kinetic impacts in design of dye-sensitized solar cells. Considerations include cell structure, competing processes, kinetic rates, dye adhesion geometry, dye electronic structure, quantum yield, electron injection, density of states, triplet states lifetime, & sources of quenching.
Done By: Arwa_Black7
School Name: Arwa Bint Abdul Motaleb Secondary Independent School for Girls
Dye-Sensitized Solar Cell (DSSC) Module:
The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
Our project idea is about using of basil pigment in lighting tents in the desert using Dye-sensitized solar cell.
In times of fossil fuel shortage, increasing crude oil prices, as well as rejection of conventional energy sources (e.g. coal or nuclear power plants), sustainable energy forms become more and more the focus of attentions. Hydropower, wind power, geothermal power, or biomass processing are but a few of these sustainable resources.
Another important source for renewable energy is solar power. Photovoltaics and solar thermal collectors are most widely used.
Dye solar cells (DSCs) which are discussed in this application note are thin film cells. They are also called dye sensitized solar cells (DSSC) or Grätzel cells named after the Swiss chemist Michael Grätzel who was greatly involved in the development of new cell types.
Done by Geniuses group, Doha Independent secondary school for boys
Dye-Sensitized Solar Cells (DSSC) is a low-cost solar cell belonging to the group of thin film solar cells.
As you know that the Qatari society likes to spend the weekend in the mainland, and this is the idea of our project in the energy that you need to spend the Qatari family needs in such leave, the provision of our product provides the raw material in the production of electricity as fuel, diesel fuel.
I think it will help the beginners who are much not aware of this topic.This is a complete presentation about organic electronics.That have contain all the topics which i think would be very helpful mostly for engineering students and there are many pictures and no names in the slides so students can easily download it and paste it for their college presentation.
introduction to DSSC, Principle and working of DSSC,Component involved in DSSC, how does DSSC work?,Advantage and disadvantage of DSSC, application of DSSC.
Electron Injection Kinetics in Dye-Sensitized Solar CellsChelsey Crosse
Overview of kinetic impacts in design of dye-sensitized solar cells. Considerations include cell structure, competing processes, kinetic rates, dye adhesion geometry, dye electronic structure, quantum yield, electron injection, density of states, triplet states lifetime, & sources of quenching.
Done By: Arwa_Black7
School Name: Arwa Bint Abdul Motaleb Secondary Independent School for Girls
Dye-Sensitized Solar Cell (DSSC) Module:
The students study the concept of using dyes to plant dyes to capture the solar energy to convert it into electrical energy simulating the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products.
Our project idea is about using of basil pigment in lighting tents in the desert using Dye-sensitized solar cell.
In times of fossil fuel shortage, increasing crude oil prices, as well as rejection of conventional energy sources (e.g. coal or nuclear power plants), sustainable energy forms become more and more the focus of attentions. Hydropower, wind power, geothermal power, or biomass processing are but a few of these sustainable resources.
Another important source for renewable energy is solar power. Photovoltaics and solar thermal collectors are most widely used.
Dye solar cells (DSCs) which are discussed in this application note are thin film cells. They are also called dye sensitized solar cells (DSSC) or Grätzel cells named after the Swiss chemist Michael Grätzel who was greatly involved in the development of new cell types.
Done by Geniuses group, Doha Independent secondary school for boys
Dye-Sensitized Solar Cells (DSSC) is a low-cost solar cell belonging to the group of thin film solar cells.
As you know that the Qatari society likes to spend the weekend in the mainland, and this is the idea of our project in the energy that you need to spend the Qatari family needs in such leave, the provision of our product provides the raw material in the production of electricity as fuel, diesel fuel.
I think it will help the beginners who are much not aware of this topic.This is a complete presentation about organic electronics.That have contain all the topics which i think would be very helpful mostly for engineering students and there are many pictures and no names in the slides so students can easily download it and paste it for their college presentation.
Infrared plastic solar cell @1000KV Technologies 90308448771000kv technologies
electronics engineering live projects abstracts
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Natural Dye-Sensitized Solar Cells (NDSSCs) From Opuntia Prickly Pear Dye Usi...IJERA Editor
Natural dye-sensitized solar cells (NDSSCs) have gained considerable attention in the field of solar energy due to their simple fabrication, good efficiency, and low production cost. Natural dyes are environmentally and economically superior to ruthenium-based dyes because they are nontoxic and cheap. However, the conversion efficiency of dye-sensitized solar cells based on natural dyes is low. One way to improve the DSSC performance is to enhance the absorptivity of extracted natural dyes. We investigated the influence of various factors in the extraction process, such as utilization of different extraction approaches, the acidity of extraction solvent, and different compounds of solvents on the optical absorption spectra. It was found that we could considerably enhance the optical absorptivity of dye and consequently the performance of DSSC by choosing a proper mixture of ethanol, methanol and water. In this study, a photo electrode using ZnO doped TiO2 nanoparticles was prepared by sol-gel method. In this paper we investigate the optical absorption, functional group, surface morphology and elementary composition of pure TiO2, ZnO doped TiO2 nanoparticles and opuntia prickly pear dye extract by using UV-Visible, PL-Studies, FT-IR, FE-SEM and EDS analysis. Finally photocurrent-voltaic characterization of nanocrystaline natural dye solar cell using I-V studies. It was found that the levels of short-circuit current (Jsc), open-circuit voltage (Voc), fill factor (FF) and overall conversion efficiency (η).
An Research Article on Fabrication and Characterization of Nickel Oxide Coate...ijtsrd
In this paper we have produced NiO thin film based solar cells. The NiO thin film was then studied for their structural, optical and electrical properties. By the help of these results we have capable to know about the structure of NiO the phase purity of the thin film X ray diffraction XRD pattern of NiO showed the diffraction planes corresponding to cubic phase respectively. The optical properties showed that with the increase in the deposition time of NiO the energy band gap varied between 3.1 to 3.24 eV. In the end, IV characteristics of the thin films were obtained by the help of matlab in the presence of light as will as dark region. Vijay Aithekar "An Research Article on Fabrication and Characterization of Nickel Oxide Coated Solar Cell" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25300.pdfPaper URL: https://www.ijtsrd.com/physics/nanotechnology/25300/an-research-article-on-fabrication-and-characterization-of-nickel-oxide-coated-solar-cell/vijay-aithekar
Emerging Next Generation Solar Cells: Route to High Efficiency and Low Costijtsrd
Generation of clean energy is one of the main challenges of the 21st century. Solar energy is the most abundantly available renewable energy source which would be supplying more than 50% of the global electricity demand in 2100. Solar cells are used to convert light energy into electrical energy directly with an appeal that it does not generate any harmful bi-products, like greenhouse gasses. The manufacturing of solar cells is actually based on the types of semiconducting or non-semiconducting materials used and commercial maturity. From the very beginning of the terrestrial use of Solar Cells, efficiency and costs are the main focusing areas of research. The definition of so-called emerging technologies sometimes described as including any technology capable of overcoming the Shockley“Queisser limit of power conversion efficiency (33.7 percent) for a single junction device. In this paper, few promising materials for solar cells are discussed including their structural morphology, electrical and optical properties. The excellent state of the art technology, advantages and potential research issues yet to be explored are also pointed out. Md. Samiul Islam Sadek | Dr. M Junaebur Rashid | Dr. Zahid Hasan Mahmood"Emerging Next Generation Solar Cells: Route to High Efficiency and Low Cost" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-4 , June 2017, URL: http://www.ijtsrd.com/papers/ijtsrd96.pdf http://www.ijtsrd.com/physics/other/96/emerging-next-generation-solar-cells-route-to-high-efficiency-and-low-cost/md-samiul-islam-sadek
Ultra-optical characterization of thin film solar cells materials using core...IJECEIAES
This paper investigates on new design of heterojunction quantum dot (HJQD) photovoltaics solar cells CdS/PbS that is based on quantum dot metallics PbS core/shell absorber layer and quantum dot window layer. It has been enhanced the performance of traditional HJQD thin film solar cells model based on quantum dot absorber layer and bulk window layer. The new design has been used sub-micro absorber layer thickness to achieve high efficiency with material reduction, low cost, and time. Metallicssemiconductor core/shell absorber layer has been succeeded for improving the optical characteristics such energy band gap and the absorption of absorber layer materials, also enhancing the performance of HJQD ITO/CdS/QDPbS/Au, sub micro thin film solar cells. Finally, it has been formulating the quantum dot (QD) metallic cores concentration effect on the absorption, energy band gap and electron-hole generation rate in absorber layers, external quantum efficiency, energy conversion efficiency, fill factor of the innovative design of HJQD cells.
Multifunctional materials for clean energy conversionDevika Laishram
With the rapid depletion of fossil fuels, rising environmental concerns,
and population growth, it is inevitable to develop clean energy technologies
to power our future society [1e4]. These energy conversion and storage
technologies are anticipated to be sustainable and also capable of meeting
our long-term energy needs. During the past few years, extensive research
interests have been devoted to the advancement of energy conversion devices, as they play a crucial role in the prosperity and economic growth of
a country. Particularly, the energy conversion technologies such as solar
and fuel cells have proved to be highly reliable and can offer clean and sustainable energy at affordable rate [5e8]. However, the performance potential of these devices, such as output voltage, conversion efficiency, and
stability, are greatly relied on the materials used. The energy conversion process comprises physical and/or chemical reactions at th
Scientific Management of Equipment in Medical Innovation LaboratoryScientific Review SR
Aim; To solve the problem of innovation laboratory instrument management and improve laboratory management level. Method; It is necessary to do an excellent job in managing innovative laboratory equipment by improving the equipment management system, functional division management, appointment registration, and strengthening the construction of management teams to guarantee the cultivation of innovation and entrepreneurship capabilities of undergraduates. Results; The number of innovative experimental projects approved and the number of project groups that the laboratory can accept at the same time was increased significantly. The utilization rate of laboratory equipment has increased, and the vacancy rate has decreased. Conclusion; Excellent instrument management can significantly improve the efficiency of scientific research in the innovation laboratory.
Internationalization and Sustainable Operations: A Broad Investigation of Chi...Scientific Review SR
We investigate if internationalization behaviors encourage sustainable operations of China’s manufacturing firms due to their substantial impact on climate change and special governance modes, and organize a heterogeneity test to clarify what kind of internationalization behaviors can robustly influence such operations. We find that firms with abundant assets and heavy-polluting feature are more committed to sustainable operations. Getting close to international sustainability standards, international auditing standards, and international business all improve sustainable operations. Heterogeneity test further shows that compared with international standards, the positive impact of international business on sustainable operation lacks a robustness, which responds to an argument that for one country, international business acts as a double-edged sword. Overall, this paper reveals internationalization as a key indicator significantly influencing economic, ecological, and social spheres in manufacturing sectors of emerging markets, and complying with well-accepted international standards can be significantly embodied in a more optimistic sustainable operations. However, how to deal with international business in a right manner is a research highlight worthy of ongoing discussion. We focus on different types of internationalization behaviors, and this indicator can theoretically inspire future study to dialectically evaluate the role of internationalization in addressing sustainability problems in emerging markets’ pillar industries.
Mechanical Engineering in Ancient Egypt, Part 92: Tomb Inscription During the...Scientific Review SR
This work is based on a previously published hypothesis which proposed that the solid matter of the universe can be represented as a vibrational wave of energy propagating over an ether or matrix through a mechanism that scrambles the degree of duality in matter: x% localized (solid), y% delocalized (wave). The main purpose of this paper is to present a two-dimensional approximation of the three-dimensional structure of the shape of the energy distribution of an atomic orbital to propose a mechanism through which the orbital can be transported as a vibration from a point A to point B in the matrix. This process requires cycles or oscillations of mounting-dismounting-remounting in which what travels from point A to point B is the energy forming the orbital and not the solid matter that it can form. The atomic seven-dimensional f orbital of hydrogen-like atoms is used as a model to show an analogy to the transformations that it can be submitted to when transported over the matrix.
Usability Engineering, Human Computer Interaction and Allied Sciences: With R...Scientific Review SR
Human Computer Interaction is actually responsible for the designing of the computing technologies keeping in mind the aspects of Interaction. Some of the fields viz. Man-Machine Interaction (MMI), User Experience Designing, User Experience Design, Human Centered Designing etc and importantly all these systems and technologies are dedicated to the designing of interface of various tools and systems such as computers, laptops, electronic systems, smart phones etc. Information Technology field is growing rapidly and there are various technologies are increasing viz. Big Data Management, Cloud Computing, Green Computing, Data Science, Internet of Things (IoT), HCI, Usability Engineering etc. Usability Engineering is gaining as a field of study as well and dedicated in creation of the higher usability and user friendliness of the electronic tools and products. In this field few aspects and technologies are most important and emerging viz. Human cognition, behavioral Research Methods, Quantitative techniques etc for the development of usability systems. Designing, implementation, usability even in multimedia material viz. audio-video may also practice in the Usability Engineering and allied fields. Wireframes including few other prototypes are required in maintaining of the better and healthy man and machine interaction. As the field is growing therefore, it is applicable in other sectors and allied areas and among these agriculture is important one. In agricultural sector different applications of information technologies are increasing and among this Usability Engineering and HCI are important one. In pre production and also in post production; directly and indirectly this technology is emerging and growing. This paper talks about the basics of this technologies and also its current and future technologies with reference to academic potentialities of this branch in Agricultural Informatics programs.
Concentration Distribution and Ecological Risk Assessment of Polycyclic Aroma...Scientific Review SR
The ecological risk assessment of 16 USEPA priority polycyclic aromatic hydrocarbon (PAHs) in water and sediments of Kolo creek, Niger Delta Nigeria was assessed the samples were collected from November, 2018 to June, 2019 from seven locations (A-G) along the creek. The samples were extracted using standard methods and analyzed using gas chromatography (model: HP5890 S). The concentrations of the PAHs in the water and sediment samples ranged between 0.000 - 9.239 µ/L and .002 – 374.35µg/Kg respectively. All the compounds analyzed were detected in all the sampling places, even area far from the flow stations. Hence, the urban runoffs, sewage discharges, and agricultural activities are implicated. Four rings hydrocarbon were present in higher concentration when compared to other PAHs in all sampling sites, with benz (a)anthracene having the highest values in both matrixes. Similarly, lower molecular weight (LMW) PAHs were present in lower concentrations in all sampling sites and they are known to exhibit higher lethal toxicity than the larger PAHs. HMW were present in high concentrations than LMW and are persistent in the environment as a result of their increase resistance to oxidation, reduction and vaporization as molecular weight increases. Similarly, The PAFs of the investigated creek is less than 5%, suggesting existences of minor ecological risks that are insignificance. However, the TEQs detected in high molecular weight showed that there is possibility of cancer to those who may be exposed to the bottom sediment. The indices measured in this habitat may put more pressures to the aquatic organisms and cause drastic changes to their ecosystem which may lead to species extinction.
Volume Fractions of Tantalum Carbides Deduced from the Ta Contents in the Mat...Scientific Review SR
Some superalloys for service at high temperature under stresses are strengthened by tantalum carbides. Their creep resistance depends on the quantity of TaC and this is the reason why it is often important to control the volume fraction of these carbides in the microstructure. Metallographic preparation followed by electron imaging and surface fraction measurements by image analysis is a frequent way for that. Another possibility is to deduce the mass fraction of TaC, and after their volume fraction, from the chemical composition of the matrix when the alloys are only double–phased, on the {matrix + TaC} type. In this work three alloys – chemically designed to be made exclusively of matrix and TaC – were elaborated and isothermally exposed to an elevated temperature for a duration long enough to allow the alloys being at their thermodynamic equilibria. The chemical compositions of the alloy and of its matrix were measured and the results allowed evaluating their TaC mass fractions which were converted in volume fractions. The obtained TaC fractions were compared to results issued from thermodynamic calculations. Good agreement was found for the three alloys, and this allowed to exploit the used software and thermodynamic database to explore further the microstructures at the same high temperature, notably to know the conditions on the Co, Ni, Cr, Ta and C contents to keep the {matrix + TaC} structure and to avoid any possible partial melting.
Assessment of the Coliform Bacterial Load of Some Drinking Water Sources in D...Scientific Review SR
Drinking water samples from 5 sachet water companies, 3 boreholes and 2 taps, collected from different locations of Dutse Metropolis of Jigawa State, Nigeria were analysed for coliform bacterial counts using the Membrane Filtration Technique. All the samples contained some amounts of total coliforms, but mostly within permissible levels. Thirty three percent (33%) of the samples from borehole, 60% from sachet water and 100% from the taps contained faecal coliforms, which indicates contamination. Cultures of the faecal coliforms obtained were morphologically identified using the gram-staining procedure and some series of biochemical tests were carried out in order to identify the organisms. The identified organisms were Escherichia coli (E. coli), Klebsiella sp. and Citrobacter sp. Presence of coliforms above the regulatory set standards indicates contamination and un-safeness of the water for drinking. Presence of organisms such as E. coli, Klebsiella sp. and Citrobacter sp. necessitates improvement in monitoring and water hygiene practices to improve the quality of drinking water in the study area.
Bio Inspired Self-Curing Composite: A Leap into Augmented EnactmentScientific Review SR
Relentless progress has been made on composite materials, their manufacturing processes and their structural design in past few decades. Nevertheless, the approval of composite materials in all engineering disciplines is constrained due to its susceptibility to various kinds of defects during manufacturing stage viz porosity, foreign body inclusion, incorrect fiber volume, bonding defect, fiber misalignment, ply misalignment, incorrect curing cycle, wavy fiber, ply cracking, delamination, fiber microstructural defects etc. Hence there was a requirement of techniques to somehow overcome these defects during the service life of composites being used in various structures and equipment. This promising field of research has made great progress over the past several years, but many procedural encounters are still to be overcome, and there exists a great need for focused research to address several areas of concern. On the other hand, nature has materials that have curing potential and repair strategies ensuring their survival. Sustained development in the field will produce new curing chemistries that possess greater stability, faster kinetics. Tailor-made placement of curing agents is dynamic research subject at the cutting edge of self-curing. New bio-imitative curing agents are closely connected to vascular networks. The purpose of this technical paper is to sort the methodology in line with ongoing research efforts in composites. A perspective on current and future self-curing approaches using this biomimetic technique is offered.
Influence of Information and Communication Technology (ICT) in Tourism Sector...Scientific Review SR
Nepal is a country blessed with natural beauty, diverse culture, majestic Himalayas, religious destination which attracts thousands of tourists every year making the tourism industry progressive to flourish. Information Communication Technology (ICT) proves to be an effective tool for strengthening the tourism industry. Thus, the purpose of this research study is to analyze about the past scenario of tourism industry, advent of ICT in tourism industry, positive impacts of ICT in tourism industry through in-depth interview with tourism experts and people who have worked for tourism since decades. This study is a form of qualitative research where narrative inquiry has been selected and the scenario has been analyzed through themes developed from the narratives. The result reveals that the emerging technology brings positive impacts to tourism industry assisting branding, promotion of the country, enhancing networks through communication and easily booking tours. The proper utilization of ICT helps to welcome tourists and to give identity of our country Nepal to the world.
Reinforcement of Bakelite Moulding Powder in Acrylonitrile Butadiene Rubber (...Scientific Review SR
The influences of two phenolic resins, that is, cashew nut oil modified phenol-formaldehyde resin (CN-m-PF) and Bakelite moulding powder (BMP), on properties of carbon black filled acrylonitrile butadiene rubber (NBR) were investigated and compared. Processability, cure characteristics, mechanical properties, thermal ageing resistance, and oil resistance of the NBR filled with various contents of phenolic resins (0-60 phr) were determined. The addition of both resins leads to a prolonged cure time with a greater value of torque difference. Regardless of the resin type, the improvement of compound processability and the enhancement of modulus and hardness of the NBR vulcanisates are observed with increasing resin content. However, many mechanical properties such as tensile strength, elongation at break and abrasion resistance are deteriorated. Thermal ageing resistance of the NBR vulcanisate is slightly improved in the presence of both resins, probably due to the dilution of NBR with the high heat-resistant phenol-formaldehyde resins. Results also disclose that all NBR vulcanisates demonstrate excellent oil resistance, regardless of the resin type and content. At any given resin content, CN-m-PF gives a better processability, higher stiffness and greater mechanical properties than BMP. However, due to its lower cost, BMP can be used to enhance stiffness of NBR vulcanisates without the risk of processing problem.
Toxic Effect of Glyphosate-Pesticide on Lipid Peroxidation Superoxide Dismuta...Scientific Review SR
The oxidative stress indices lipid peroxidation (LPO), superoxide dismutase (SOD) and catalase (CAT) in juvenile Clarias gariepinus (average weight 200.15 g) exposed to sub - lethal dose 2.40mg/L and 4.98mg/L of glyphosate was investigated over a period of days 1,5,10 and 15 in three replicates. The colorimetric analysis showed increase in lipid peroxidation from 4.55 ±2.14a1 to 12.12± 10.00a1at 2.40mg/L but remain the same at 4.98mg/L (4.55±2.14a1) compared with control (3.03±0.01a1 to 1.51±2.14b1) from day 1 to 15. The SOD activity decreased significantly with time and concentration compared with control. The Catalase activity at day 15 decreased to 0.17±0.05a1 in 2.40mg/L but further increased to 0.28±0.05b1 in 4.98mg/L compared to 0.28±0.02a1 catalase activity as control. The result suggests that glyphosate induce oxidative stress that may overwhelm the antioxidant system in juvenile catfish especially at higher concentrations with long exposure.
Wheeled robots are often utilized for various remote sensing and telerobotic applications because of their ability to navigate through dynamic environments, mostly under the partial control of a human operator. To make these robots capable to traverse through terrains of rough and uneven topography, their driving mechanisms and controllers must be very efficient at producing and controlling large mechanical power with great precision in real-time, however small the robot may be. This paper discusses an approach for designing a quad-wheeled robot, which is wirelessly controlled with a personal computer (PC) by medium-range radio frequency (RF) transceiver, to navigate through unpaved paths with little or no difficulty. An efficient servo-controlled Ackerman steering mechanism and a high-torque driving power-train were developed. The robot’s controller is programmed to receive and respond to RF control signals from the PC to perform the desired motions. The dynamics of the robot’s drivetrain is modeled and analyzed on MATLAB to predict its performances. The robot was tested on various topographies to determine its physical capabilities. Results show that the robot is capable of non-holonomically constrained motions on rough and uneven terrains.
Geometrical Analysis and Design of Tension-Actuated Ackermann Steering System...Scientific Review SR
The tension-actuated steering system is a vehicular steering design that comprises a motorized gear system, pulleys, inelastic string, main steering bar, and a strain gauge. This development is aimed to produce a steering design that could enhance the efficiency of steering systems in quad-wheeled (i.e. four-wheeled) robots. In this work, the steering system of conventional passenger vehicles and existing quad-wheeled robots are reviewed and their technical deficiencies are improved based on cost, power and production factors. Thus, the tension-actuated steering system is proposed as a solution for mechanizing steering functions in quad-wheeled robots. It is expected that this work will stimulate interest and enthusiasm.
A Study of Propensity Score on Influencing Factors of Length of Stay in Hospi...Scientific Review SR
Background: Burns are a global public health problem, which are universal and can happen to anyone. Because the physical functions in children and adults are different, the confounding factors are easy to affect the results of study. Objective: In this study, we aimed to explore influencing factors of the length of hospital stay (LOS) when the confounding factors were excluded by Propensity Score (PS) in children and adults. Methods: Patients hospitalized for burn from 2014 to 2016 were retrieved from the medical record system of a general biggest hospital in Zunyi. A database was established to analyze the influencing factors of LOS between children and adults by the PS. Results A total of 465 children (61.7% males) and 327 (69.7% males) adults were recruited. The average age was 3.61±3.57 years and 42.48±14.76 years in children and adults with burns respectively. Before PS matching, low age and skin grafting were the protective factors for LOS (Hazard Ratio [HR]=0.993 and 0.339). The risk factors of LOS were male (HR=1.234), the burn depth and total body surface area (TBSA), and burn etiology (HR=1.497). After PS matching, only skin grafting (HR=0.080) and treatment within 24 hours (HR=1.865) were the common influencing factors of LOS. Conclusion the confounding factors were excluded by the PS method, and skin grafting was still a protective factor of LOS for both children and adults. The results provide a reference for the promotion of skin grafting to reduce LOS in burn patients.
Concrete is one of the reliable, durable, economical and acceptable construction materials among the building and construction stakeholders worldwide. Performance of concrete could be threatened especially reinforced concrete by some processes such as corrosion, sulfate attack among others. Corrosion of reinforcement in reinforced concrete can be induced by carbonation process. Even though carbonation initiates corrosion, it has been gathered that carbonation could still be of immense benefits to building and construction industries if its mechanism of operation is understudied. This research work has therefore investigated the effect of carbonation on some selected mechanical properties of concrete such as compressive strength, flexural strength, water absorption and weight changes. Concrete cubes and beams of M15 grade with 0.5 % water-cement ratio were prepared and subjected to accelerated carbonation. Their compressive strength, flexural strength, water absorption and weight changes were determined in accordance with the relevant standards. The outcomes show that carbonation improves all the mechanical properties investigated. The use of carbonation can be positively explored in reinforced concrete provided there is adequate nominal cover.
Biogas Synthesis as Means of Solid Waste Management in Kampala, UgandaScientific Review SR
Cattle dung, cooked food waste, and chicken droppings mixed with coffee husks have been used separately and also as mixtures to form anaerobic digestion slurries in a bid to treat to degrade the organic fractions of these wastes and recycle the bio-fertilizer after recovering biogas. Single and mixed substrate slurries evolved significant quantities of methane within 27days together with reduced mass of soil conditioner. The volume of biogas formed in cogeneration mixtures were higher than for single substrate digestion due to the C/N ratio shifting to near 30:1 as a result of mixing. So degradation of organic pollutants was higher in mixed substrate digestion mixtures. Our study yielded average volumes ranging from 315 to 435+ 5.65.mL/L which was in agreement with what is in literature. Digestion of cattle dung, cooked waste foods, and droppings of chicken and mixed substrate slurries using sludge inoculums was very effective in degrading solid waste from homes, thus detoxifying it to bio-fertilizers. Although both single and mixed substrate digestion of waste yielded high enough volumes of biogas; digestion of slurry of mixed organic solid waste substrates is better method of waste management. Digestion of garbage from Kampala should be tested at macro levels at both ambient and mesophilic temperatures. There is need to try out the garbage digestion experiments in the semi-arid towns as well as very cold towns in Uganda.
The Influence of Partial Replacement of Some Selected Pozzolans on the Drying...Scientific Review SR
Concrete is prone to cracking and one of the major causes of cracking is drying shrinkage of the hardened concrete. This research work was carried out to study the influence of partial replacement of some selected pozzolans on the drying shrinkage of concrete. Four pozzolans used in this study, were made to replace cement at various percentages resulting in various concrete mixes. Setting time test was conducted for the various cement mixes using Vicat’s apparatus and drying shrinkage test was done for the concrete test specimens. The results of the setting time indicate that partial replacement of pozzolans with ordinary Portland cement increases both the initial and final setting time of cement as the percentage replacement increases. Similarly, drying shrinkage results show that concrete made with Groundnut Shell Ash (GSA) and Locust Bean Pod Ash (LBA) at 12% replacement will have a stable and better shrinkage resistance than the control at both 56 days and 90 days. Meanwhile, the control concrete gives a better drying shrinkage at 28 days curing. In conclusion, the results show that pozzolanas [Bamboo Leaves Ash (BLA), Locust Bean Pod Ash (LBA), Sugarcane Bagasse Ash (SBA) and Groundnut Shell Ash (GSA)] can successfully replace cement up to 12% without necessarily affecting the shrinkage ability of the produced concrete. It also shows that Groundnut Shell Ash (GSA), Locust Bean Pod Ash (LBA) and Bamboo Leaves Ash (BLA) are more resistance to drying shrinkage than the control.
Study on the Granulation of FLY Ash from Thermal Power StationScientific Review SR
The effect of the type and amount of binding substance on the yield and strength of granules prepared from fly ash was studied. The highest yield of granules was achieved with clayish slip used as binder. The granules obtained are brittle, with compression strength 0,1МРа. The apparent density of the sintered granulates was in the range1200-1500kg/m3 and the total porosity was 55-40%.
Machining Versus Molding Tolerances in Manufacturing Automotive Sealing SystemsScientific Review SR
The automotive industry has been at the forefront of converting traditional metal parts to plastics. The latter surely offer greater design freedom, opportunity for consolidation, fewer assembly operations, reduced secondary finishing, weight reduction, lower total system costs, a range of properties tailored to specific applications, the ability to withstand temperatures, immunity to most chemicals and corrosive environments. They offer processing in many colors, electrical non-conductivity (insulation from electrical shocks), good thermal breaks (“warmth-to-the-touch”), and low sound transmission (tendency to muffle noise). Nonetheless, plastics have only tapped an estimated 15% of their tremendous potential to replace metals. This is particularly to increase with newer high-performance plastics, increasing sophistication in alloying and blending technologies, and use of computer-aided design and engineering (CAD/CAE) systems. The latter enable engineers to visualize complex parts and molding tools more effectively and faster than ever before. This article identifies fundamental steps and requirements to conduct an efficient and successful conversion of metallic parts to plastics, reviewing the replacement design process from concept to production; an under-the-hood rear retainer for Ford Motor Company is detailed as a case study.
Sinthesis and Properties of Marble-Like Glass-Ceramics Using of Ash from Ther...Scientific Review SR
Color marble-like glass-ceramic materials were obtained through thermal treatment of glasses of the system CaO-Al2O3-SiO2 by using natural materials with the introduction of waste materials - ash from thermal power plants (TPP). The melting of the glass batch was in corundum crucibles at 1450oC with an isothermal hold of 60 min. The glasses obtained was fritted in distilled water and dried for 6 hours at 100oC, then completely crushed and divided into fractions with grain size of 0.8 mm, 1.0 mm, 2 mm, 2.5 mm and over 2.5 mm. It was found that the use of ash from TPP lead to higher values of degree of transformation (crystallization) than using base composition. Values of Avramy parameter’s in the range n=1,0 ÷ 1,6 are showed that crystallization of the glass frit is largely heterogeneous and crystal growing starts from the surface. The introduction of ash from TPP to native glasses carry out to significant reduction of energy of crystallization by Ес=289 kJ/mol to Ec=221 kJ/mol. The glass-ceramic materials were obtained through a one stage crystallization - 1050÷1070оС and an isothermal hold of 60 min., colored white, yellow brown to dark brown. The main crystalline phase in glass-ceramics is β-vollastonite with needle habit, size of crystals - ĺ = 40 ÷ 120 μm and d <5 μm in quantities 37 ÷ 42%. As secondary phases depending on the amount of ash have been identified - the anorthite, gehlenite and α-quartz with prismatic habit were appeared. The obtained glass-ceramic materials have a marble-like effect and technical parameters compared with natural granite and marble and have higher values of density, micro hardness, speed grinding, bending strength and chemical resistance. That’s why they can be used in construction such as lining materials.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Design and Simulation of Dye Sensitized Solar Cell as a Cost-Effective Alternative to Silicon Solar Panel
1. Scientific Review
ISSN(e): 2412-2599, ISSN(p): 2413-8835
Vol. 4, Issue. 5, pp: 44-52, 2018
URL: http://arpgweb.com/?ic=journal&journal=10&info=aims
Academic Research Publishing
Group
*Corresponding Author
44
Original Research Open Access
Design and Simulation of Dye Sensitized Solar Cell as a Cost-Effective
Alternative to Silicon Solar Panel
P. K. Olulope*
Department of Electrical and Electronic Engineering, Ekiti State University Ado-Ekiti, Nigeria
A. O. Adeleye
Department of Electrical and Electronic Engineering, Ekiti State University Ado-Ekiti, Nigeria
A. B. Amomoh
Department of Electrical and Electronic Engineering, Ekiti State University Ado-Ekiti, Nigeria
Abstract
The continuous research in the area of renewable energy technology to substitute the unsustainable nature of fossil
fuel in terms of it future availability and negative environmental impact created by fossil fuel has ensure the explore
of solar energy as a good alternative. Dye sensitized solar cells (DSSCs) serve to be a good alternative means of
producing photovoltaic solar cell. This work reports the working principle and construction process of dye-sensitized
solar cell. A synthesized dye (Ruthenium oxide) and an iodide electrolyte were used for better performance based on
already researched work. Also, this work reports the evaluation process with results recorded by the produced solar
cell within 6:00am (GMT) and 6:00pm (GMT) for selected days. The results from the evaluation process show a
better performance of a dye-sensitized solar cell in low and normal sunny day. The solar cell has a good performance
at 12:00noon with a 0.5V output.
Keywords: Design; Simulation; Dye sensitized solar cell; Silicon solar panel.
CC BY: Creative Commons Attribution License 4.0
1. Introduction
The unsustainable nature of fossil fuel as a cogent source of energy from the point of view of future availability
and negative environmental impart, has energized interest in diversification of energy sources, with particular
interest in renewable energy. This is indeed helping us to confront climate change by ending the world‟s dependence
on fossil fuels, by tapping the power of new sources of energy like the wind and sun. The photovoltaic (PV) industry
is a player in the renewable energy segment and the electricity generation from photovoltaic (solar cells) is deemed
to be one of the key technologies of the 21st
century [1]. Photovoltaic solar electricity remain a classy means of
electricity generation, as there are no moving parts, clean and zero emissions and no noise.
The dominant material used in PV cells is silicon, particularly multi-crystalline silicon [2]. Further research has
evolved new method of producing solar cell such as dye sensitizing solar cell. Since the invention of dye- sensitized
solar cells (DSSCs) in 1991, they have been studied extensively as an alternative to silicon-based solar cells, owing
to their simple structure, transparency, flexibility, low production cost, and wide range of application. Despite these
advantages, the low efficiency of DSSCs compare to that of silicon-based cells has limited their commercial
implementation [3]. Consequently there is a critical need to improve the efficiency of state-of-the-art DSSCs in
order to realize next generation solar cells.
DSSCs are composed of four parts as follows:
1. The electrode film layer.
2. The conductive transparent Titanium oxide layer that facilitates charge transfer from the electrode layer.
3. The counter electrode layer made of platinum or carbon.
4. The redox electrolyte layer for reducing the level of energy supplied from the dye molecules [4, 5].
Recently, titanium dioxide (TiO2) has attracted attention from researches worldwide due to its potential
applications in environmental potential and energy generation [6], and has been applied largely in DSSC due to its
nanocrystalline mesoporous nature that translates to high surface area for dye adsorption. The absorbed dye
molecules can then be excited by the solar energy to generate electron-hole pairs that are subsequently separated and
transported within the lattice of TiO2 [7]. The absorption spectrum of the dye and the anchorage of the dye to the
surface of TiO2 are important parameters in determining the efficiency of cell [8].
2. Literature Review
A Dye Solar Cell is composed of two electrodes, the anode and the cathode. These electrodes are made from a
specific glass that has a Transparent Conductive Oxide (TCO) coating on one side. The transparent conductive oxide
2. Scientific Review
45
material is a thin layer of fluorine-doped tin oxide, also called FTO. The transparency of the substrate allows
sunlight to enter the cell while its conductive surface collects charges.
The anode is the negative terminal of the solar cell. It essentially bears a continuous network of sintered
titanium dioxide nanoparticles. This porous network offers an inner surface that is a thousand times greater than the
equivalent flat area, and acts like a “light sponge” in which sunlight can get trapped.
Among the various types of third generation solar cells, dye-sensitized solar cells are promising as they are cost
effective, relatively easy to fabricate on large panels, lightweight and flexible; they also offer transparency compared
to the first two generations of solar cells [9-11].
Due to their unique transparency [12], dye-sensitized solar cells have also shown superior performance under
indoor lighting [13] and have been developed extensively on flexible substrates [14]. Dye-sensitized solar cells
provided a technically and economically credible alternative concept to present day p-n junction photovoltaic
devices. Unlike the conventional solar cell systems in which semiconductors functions as both photon absorber and
charge carrier, dye-sensitized solar cells separate these two functions to two different materials. A light sensitized
organic dye functions as the photon absorber, leaving the charge carrier function to the semiconductor.
Dye-sensitized solar cells are promising due to their low cost fabrication compared to the first two generations
of solar cells; however, their efficiency is much lower than commercially available thin silicon solar modules.
Although efficiency values up to about 13% have been reported in dye-sensitized solar cells [3].
The mechanism of dye-sensitized solar cells is similar to that of silicon solar cell. Photo excitation at a
monolayer of organic dye results in the injection of an electron into the conduction band of oxide. Then, organic dye
restores its original electron configuration by electron donation from the electrolyte, usually an organic system
containing redox couples [15].
The heart of this solar cell is composed of nano-particles of meso-porous (with the pore width of 2-50 nm)
oxide layer, which allows electronic conduction taking place. Since inorganic nano-particles have several
advantages such as size tenability and high absorption coefficients, it is always the first choice when considering the
cost and performance, etc. The material choice is mainly Titanium dioxide TiO2 (Anatase), but an alternative choice
such as Zinc oxide (ZnO) and Niobium pentoxide (Nb2O5) have been investigated as well [16].
Titanium dioxide was recognized as semiconductor of choice due to its great properties in photochemistry and
photo-electrochemistry; it is a low-cost, widely available, non-toxic and biocompatible semiconductor material.
Besides, experimental results showed meso-porous TiO2 layer has a highly efficient charge transport [17]. Titanium
dioxide which is a white semiconductor that is not sensitive to visible light. The Titania particles have to be
sensitized with a layer of dye molecules absorbing light in the visible spectrum. Some natural dyes can be employed,
but the most efficient pigments were synthesized after intense scientific investigation [18].
3. Working Principle of a Dye-Sensitized Solar Cell
A single layer of dye molecules acts as a light absorber and is interspersed between TiO2 particles. A drop of
liquid electrolyte containing iodide is placed on the film to percolate into the pores of the film to complete the
device. Conductive glass that has been coated with a thin catalytic layer of platinum or carbon as a counter electrode
is placed on top of the cell, and light is illuminated from the TiO2 side, as illustrated in Figure 1.0. A thicker coating
of organic dye for solar cells has been tested; however, electric charges do not move easily within most organic
materials, and it was reported that an active charge for charge injection is only effective with extremely thin layers.
Thus, thick organic films do not transfer photo excited charges as well as thin films, absorbing all of the light, and a
solar cell made from an interconnected series of thin film layers would be more effective than a cell made from a
single thick layer of dye.
Figure-1. Working principle of a dye-sensitized solar cell [19]
Dye-sensitized solar cell components are:
Transparent Conductive Oxide (TCO)
3. Scientific Review
46
Semiconductor Oxide Material
Dye Sensitizer
Electrolyte
Counter Electrode
3.1. Transparent Conducting Oxide (TCO)
Dye sensitized solar cell are constructed with two sheets of TCO material as current collectors for the
deposition of the semiconductor and catalyst. The Transparent conductive oxide material characteristics determine
the efficiency of Dye sensitized solar cell [20] due to the efficient charge transfer of electrical conductivity to
minimize energy losses.
Fluorine tin oxide (FTO) and indium tin oxide (ITO) are typical conductive oxide substrates consisting of soda
lime glass coated with fluorine tin oxide or indium tin oxide, respectively. The fluorine tin oxide is the most
common TCO used for the production of dye-sensitized solar cell.
3.2. Semiconductor Oxide Material
The central part of a Dye sensitized solar cell device consists of a thick nanoparticle film that provides a large
surface area for light-harvesting absorption molecules to accept electrons from the excited dye [21], such as TiO2,
ZnO [22], SnO2 [23], Nb2O5, WO3, Ta2O5, CdSe, CdTe, and CdS. These molecules are interconnected to allow
electronic conduction [24]. The efficiency of DSSCs depends on the electron transfer rates, which in turn depend on
the crystallization, morphology and surface area of the semiconductor.
3.3. Dye Sensitizer
An efficient solar cell sensitizer must be able to adsorb strongly to the surface of the semiconductor oxide via
anchoring groups, exhibit intense absorption in the visible part of the spectrum, and possess an appropriate energy
level alignment of the dye excited state and the conduction band edge of the semiconductor. The performance of dye
sensitized solar cell mainly depends on the molecular structure of the photosensitization. The best photosensitization
can be attained using metal transition materials [25].
Three classes of dye sensitizers are used in DSSCs: metal complex sensitizers, metal-free organic sensitizers
and natural sensitizers.
Ru (II) is the most efficient dye due to its numerous advantageous features, such as good absorption, long
excited-state lifetime, and highly efficient metal-to-ligand charge transfer. Tris(bipyridine)ruthenium(II) complexes
are excellent photosensitizers due to the stability of the complexes‟ excited states and the long-term chemical
stability of oxidized Ru (III) [26].
The standard dye used in traditional DSSCs is tris(2,2‟-bipyridyl-4,4‟-carboxylate) ruthenium (II) (N3 dye) [27].
Natural dyes are a viable alternative to expensive organic-based DSSCs. The overall solar energy conversion
efficiency of natural dye extracted from pigments containing anthocyanins and carotenoids has been demonstrated to
be below 1% [28]. Different parts of the plant, including the flower petals, fruits, leaves, stems, and roots, typically
have different pigments. The advantages of natural dyes are their low cost, easy extraction, non-toxicity and
environmentally benign nature [29].
3.4. Electrolyte
Electrolytes are used to regenerate the dye after electron injection into the conduction band of the
semiconductor and also act as a charge transport medium for the transfer of positive charge toward the counter
electrodes [30]. The liquid electrolyte is based on an organic solvent with a high ionic conductivity and distinctive
interfacial contact properties; nevertheless, the leakage and volatility of the solvent affect the long-term performance
of DSSCs [31]. Therefore, the electrolyte must have the following characteristics [32, 33]: (i) high electrical
conductivity and low viscosity for faster electron diffusion; (ii) good interfacial contact with the nanocrystalline
semiconductor and counter electrode; (iii) no tendency to induce the desorption of the dye from the oxidized surface
or the degradation of the dye; and (iv) no absorption of light in the visible region.
3.5. Counter Electrode
Counter electrodes are mainly used to regenerate the electrolyte, with the oxidized electrolyte diffusing towards
the counter electrode [30]. The counter electrode transports the electron that arrives from the external circuit back to
the redox electrolyte system. Hence, for efficient charge transfer, the counter electrode should exhibit a high
catalytic activity and high electrical conductivity [29]. Thus, the catalyst must accelerate the reduction reaction.
Based on this consideration, platinum (Pt) is considered a preferred catalyst. Pt is a superior catalyst for use as a
counter electrode for I3-
reduction because of its high exchange current density, good catalytic activity and
transparency. The performance of the counter electrode depends on the method of Pt deposition on TCO substrates,
such as the thermal decomposition of hexachloroplatinic in isopropanol [27], electrodeposition [34], sputtering [35],
vapor deposition [36], and screen printing.
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4. Silicon Solar Cell versus Dye-Sensitized Solar Cell
Table-1. Comparison between silicon solar cell and the dye-sensitized solar cell [30]
5. Methodology
1. A piece of transparent glass that conducts electricity is used as an electrode in the solar cell.
2. It is tapped down, with the conducting side facing upwards using two pieces of tape.
3. The gap between the tape is covered with a paste containing small particles of titanium dioxide using a process
called doctor blading. A blob of paste is put onto the glass and spread over the surface using a glass rod.
4. The tape is removed and the electrode is heated at a high temperature.
5. The electrode is removed and the electrode is heated at a high temperature.
6. The Titanium side of the electrode is socked or inserted into a dye. The dye molecules get attached to the surface
of the titanium dioxide particles with a chemical bond.
This process is called „sensitization‟ which is why these solar cells are called Dye-sensitized solar cells.
7. When the electrode is removed, the titanium dioxide is now coloured which allow it to adsorb sunlight better.
8. Another piece of conducting glass is used to make the other electrode of the cell. Two holes are drilled into it and
then platinum metal is sprayed onto one side to help the cell conduct electricity better.
9. The two electrodes are now put together with a square of easy-melt plastic (meltonix film to seal cell).
10. They are then heated. When heated, the plastic melts and glues the two electrodes together.
11. The cell is filled with a liquid electrolyte by injecting it through the drilled holes.
12. A piece of sticky tape then seals the holes and stops the electrolyte leaking out.
13. The solar cell production is completed and can thereby be tested in the sun.
The figure 2 below summaries the step involve in manufacturing of dye sensitizing solar cell.
Figure-2. Block diagram of dye sensitizing solar cell production procedure
When sunlight falls on the cells, a flow of small particles called electrons (e) is created. This is called a current
and can power an electrical device. Inside the cell, a particle of light called a photon hits the dye molecule. This
gives an electron enough energy to escape the molecule and move to the titanium dioxide nanoparticles.
When this happens, a hole is left behind. A mediator (M), for example iodide, in the liquid electrolyte fills the
hole with one of its own electron. The electrons travel in a big circle and create an electrical circuit, which powers a
device. All that is required is a bit of energy from the sum to start it off.
Function/ Performance Silicon Solar Cells Dye-Sensitized solar cells
Transparency Opaque Transparent
Pro-environment
(material
and process)
Normal Great
Power generation cost High Low
Power generation
Efficiency
High Normal
Colour Limited Various
Manufacturing costs High Moderate
Performance in
Diffuse Light
Low Better
Performance at
high temperature
Normal Great
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6. Evaluation of the Dye-Senitizing Solar Cells
6.1. Evaluation Equipment
Light source (Sunlight)
Cables
Variable resistance (or switchable fixed resistances) Voltmeter
Figure-3. Pictorial view showing the testing of the produced solar cell
6.2. Results and Evaluation of the Dye-Sensitized Solar Cell
6.2.1. Chart Comparing the Voltmeter Reading At Different Day
Observations from Section 6.2.1 are summarized with the Table 2 and 3 shown below.
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Table-2. Harvested voltages of 0.5V and above
Table-3. Showing voltages of 0.4Volt and above
Table 2 shows the performance of the dye-sensitized solar cell with a voltage output of 0.5V and above. This
table show that the best electricity harvest occurs at 12:00noon and 1:00pm. Also, Table 3 shows an output of 0.4V
and above with a clear indication that dye-sensitized solar cell performs effectively between the hour of 8:00am and
4:00pm.
6.2.2. Chart Relating the Average Voltage and Power for R X103 and R X102 Ohms at
12:00pm
Time Day 1 Day 2 Day 3 Day 7
6:00am
7:00am
8:00am
9:00am
10:00am
11:00am
12:00pm
1:00pm
2:00pm
3:00pm
4:00pm
5:00pm
6:00pm
Time Day 1 Day 2 Day 3 Day 7
6:00am
7:00am
8:00am
9:00am
10:00am
11:00am
12:00pm
1:00pm
2:00pm
3:00pm
4:00pm
5:00pm
6:00pm
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The chart in section 6.2.2 shows the relation of average voltage and power of the two selected ohmic value of
load at 12:00noon indicated clearly how power decreases with corresponding increase in load. This satisfies the
power law equation;
6.2.3. Chart Relating the Voltage and Power for R X103
and R X102
Ohms at 2:00pm
The chart in section 6.2.3 shows the relation of average voltage and power of the two selected ohmic value of
load at 2:00pm also correlated with the observation in section 6.2.2 by satisfying the power law equation.
P =
Hence, the increase in the value of the load leads to corresponding decrease in the power output of the dye-
sensitized solar cell.
7. Conclusion
This project was considered successful resulting from the result derived from the analyses done on the measured
data at different hours of the day. The great performance and efficiency of dye-sensitized solar cell as compare to it
cost in relation to silicon solar cell gave it an effective alternative to silicon solar cell.
This project has made it also possible to study the behavior and performance of dye-sensitized solar cell in
Nigeria since solar cells depends on the amount of irradiate which varies with geographical region.
Also, due to the remarkable performance of DSSCs under low levels of light and compact fluorescent lamps
through study, there is strong interest in both glass-based products and even more so in thin flexible dye-sensitized
solar modules, which can be easily integrated in fixed or portable electronic products such as sensors in the home
and personal computer peripherals. The commercialization of these products with integrated DSSs has been enabled
by the fact that their efficiencies are particularly high indoors, their flexibility and light weight characteristics permit
easy integration (and portability), their degradation rates are reduced in less-harsh indoor conditions.
Dye-sensitized solar cells can be used excellently as energy-harvesting electrochromic window (EH-ECW).
This helps to boast the energy generation rate.
References
[1] Braga, A. F. B. and Moreira, S. P., 2008. "New processes for the production of solar- grade polycrystalline
silicon." A Review on Solar Energy Materials and Solar Cells, vol. 92, pp. 418-424.
[2] Zhang, L. and Ciftja, A., 2008. "Recycling of solar cell silicon scrap through filtration, part 1: experimental
investigation." Solar Energy Materials and Solar Cells, vol. 92, pp. 1450-1461.
[3] Mathew, S., Yella, A., Gao, P., Humphry-Baker, R., Curchod, B. F. E., Ashari-Astani, N., Tavernelli, I.,
Rothlisberger, U., Nazeeruddin, M. K., et al., 2014. "Dye-sensitized solar cells with 13% efficiency
achieved through the molecular engineering of porphyrin sensitizers." Nat. Chem., vol. 6, pp. 242-247.
[4] Matsui, H., Okada, K., Kawashima, T., Ezure, T., Tanabe, N., Kawano, R., and Watanabe, M., 2004.
"Application of an ionic liquid –based electrolyte to a 100mmm X 100mm sized dye-sensitized solar cell."
J. Photochem. Photobio. A Chem., vol. 164, pp. 129-135.
[5] Kim, S. S., Nah, Y. C., Noy, Y. Y., and Jo, J. D. Y., 2006. "Electrodeposited pt for cost-efficient and
flexible dye-sensitized solar cells." Electrochim. Acta., vol. 51, pp. 3814-3819.
8. Scientific Review
51
[6] Saadoun, L., 2000. "Synthesis and photocatalytic activity of mesoporous anatase prepared from tatrabuty
lammonium-titania composites." Material Research Bulletin, vol. 35, pp. 193-202.
[7] O‟Regan, B. and Gratzel, M., 1991. "A low-cost , high efficiency solar cell based on dye-sensitized
colloidal TiO2 films." Nature, vol. 35, pp. 737-740.
[8] Hao, S. and Wu, J., 2006. "Natural dyes as photo-sensitizers for dye-sensitized solar cell." Solar Energy,
vol. 80, pp. 209-214.
[9] Perlin, J., 2004. "The silicon solar cell turns 50" NREL report no. BR-520-33947.
[10] Hagfeldt, A., Boschloo, G., Sun, L., Kloo, L., and Pettersson, H., 2010. "Dye-sensitized solar cells." Chem.
Rev., vol. 110, pp. 6595–6663.
[11] Bisquert, J., 2011. "Dilemmas of dye-sensitized solar cells." Chem. Phys. Chem., vol. 12, pp. 1633-1636.
[12] Tagliaferro, R., Colonna, D., Brown, T. M., Reale, A., and Di Carlo, A., 2013. "Interplay between
transparency and efficiency in dye sensitized solar cells." Opt. Express, vol. 21, pp. 3235-3242.
[13] Sridhar, N. and Freeman, D., 2011. "Proceedings of 26th European photovoltaic solar energy conference
and exhibition." In Hamburg, Germany.
[14] Brown, T. M., De Rossi, F., Di Giacomo, F., Mincuzzi, G., Zardetto, V., Reale, A., Di Carlo, A., and Mater,
J., 2014. "Progress in flexible dye solar cell materials, processes and devices." Chem. A., vol. 2, pp. 10788-
10817.
[15] Michael, G., 2003. "Dye-sensitized solar cells." Journal of Photochemistry and Photobiology,
[16] Tennakone, K., Kumara, G. R. R., Kottegoda, I. R. M., and Perera, V. S. P., 1999. "An efficient dye-
sensitized photoelectrochemical solar cell made from oxides of tin and zinc." Chem. Commun.,
[17] Nelson, J., 1999. "Continuous-time random-walk model of electron transport in nanocrystalline TiO2
electrodes." Physical Review B., vol. 59, pp. 15374–15380.
[18] Martineau, D. "The assembly guide for making your own solar cells, Dye solar cell for real." REV.,
Available: https://www.solaronix.com/documents/dye_solar_cells_for_real.pdf
[19] Stathatos, E., 2011. Solar cells - dye-sensitized devices. Rijeka, Croatia: InTech Open Access Publisher. pp.
471-492.
[20] Gong, J., Liang, J., and Sumathy, K., 2012. "Review on dye-sensitized solar cells (DSSC): Fundamental
concepts and novel materials." Renewable and sustainable Energy Reviews, vol. 16, pp. 5848-5860.
[21] Hoffmann, M. R., Martin, S. T., Choi, W., and Bahnemann, D. W. "The role of metal ion dopants in
quantum-sized TiO2: correlation between photoreactivity and charge carrier recombination dynamics."
Chem. Rev., vol. 95, pp. 6996-1995.
[22] Lupan, O., Guérin, V., Tiginyanu, I., Ursaki, V., Chow, L., Heinrich, H., and Pauporté, P., 2010. "Well-
aligned arrays of vertically oriented ZnO nanowires electrodeposited on ITO-coated glass and their
integration in dye sensitized solar cells." Inorg. Chem., vol. 211, pp. 65-73.
[23] Han, D., Heo, J., Kwak, D., Han, C., and Sung, Y., 2009. "Texture, morphology and photovoltaic
characteristics of nanoporous F:SnO2 films." Journal of Electrical Engineering Technology, vol. 4, pp. 93-
97.
[24] Chergui, Y., Nehaoua, N., and Mekki, D. E., 2011. "Solar cells - dye-sensitized devices." Intech Open, pp.
49-64.
[25] Kalyanasundaram, K. and Grätze, A., 2009. "Efficient dye-sensitized solar cells for direct conversion of
sunlight to electricity." Material Matters, vol. 4, pp. 88-90.
[26] Taya, S. A., El-Agez, T. M., El-Ghamri, H. S., and Abdel-Latif, M. S., 2013. "Dye-sensitized solar cells
using fresh and dried natural dyes." International Journal of Materials Science and Applications, vol. 2, pp.
37-42.
[27] Wei, D., 2010. "Dye sensitized solar cells." International Journal of Molecular Sciences, vol. 11, pp. 1103-
1113.
[28] Giuseppe, C., 2010. "Efficient dye-sensitized solar cells using red turnip and purple wild sicilian prickly
pear fruits." International Journal of Molecular Sciences, vol. 11, pp. 254-267.
[29] Suhaimi, S., Shahimin, M. M., Mohamad, I. S., and Norizan, M. N., 2013. "Comparative study of natural
anthocyanins compound as photovoltaic sensitizer." Advances in Environmental Biology, vol. 7, pp. 3617-
3620.
[30] Dyesol Information Article, 2011. "Unique characteristics and benefits of DSC." Available:
www.dyesol.com
[31] Wang, Z. S., Kawauchi, H., Kashima, T., and Arakawa, H., 2004. "Significant influence of TiO2
photoelectrode morphology on the energy conversion efficiency of N719 dye-sensitized solar cell." Inorg.
Chem., vol. 248, pp. 1381-1389.
[32] Xiang, N., Zhou, W., Jiang, S., Deng, L., Liu, Y., and Tan, Z., 2011. "Synthesis and characterization of
trivalent metal porphyrin with NCS ligand for application in dye-sensitized solar cells." Solar Energy
Materials and Solar Cells, vol. 95, pp. 1174-1181.
[33] Panda, M. K., Ladomenou, K., and Coutsolelos, A. G., 2012. "Porphyrins in bio-inspired transformations:
Light-harvesting to solar cell." Coordination Chemistry Reviews, vol. 256, pp. 2601-2627.
[34] Papageorgiou, N., Maier, W. F., and Grätzel, M., 1997. "An iodine/triiodide reduction electrocatalyst for
aqueous and organic media." J. Electrochem. Soc., vol. 144, pp. 876-884.
9. Scientific Review
52
[35] Tsekouras, G., Mozer, A. J., and Wallace, G. G., 2008. "Enhanced performance of dye sensitized solar cells
utilizing platinum electrodeposit counter electrodes." Journal of the Electrochemical Society, vol. 155, pp.
K124-K128.
[36] Fang, X., Ma, T., Guan, G., Akiyama, M., and Abe, E., 2004. "Performances characteristics of dye-
sensitized solar cells based on counter electrodes with Pt films of different thickness." Journal of
Photochemistry and Photobiology A: Chemistry, vol. 164, pp. 179-182.