Shyamalima Sharma has extensive research experience in developing polymer nanocomposites for photovoltaic devices. She has a Ph.D. in chemical sciences from Tezpur University and worked on projects related to solid state photovoltaics and dye-sensitized solar cells. She has published 17 papers in peer-reviewed journals and presented in several conferences. Her expertise includes fabricating bulk heterojunction and dye-sensitized solar cells to optimize efficiency. She is seeking opportunities in research and development of renewable energy technologies.
Impact of Gamma Irradiation on Structural and Dielectric Properties of CuI-PV...iosrjce
IOSR Journal of Applied Physics (IOSR-JAP) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of physics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in applied physics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Dr. M. Jayalakshmi is an electrochemist with over 20 years of experience in materials synthesis and characterization. She has worked on projects related to electrode materials for batteries and supercapacitors. Her background includes electroplating, electroless plating, and synthesis of transition metal oxides, sulfides, and lithium metal oxides. She is currently a Principal Scientist at NFTDC in India, where she leads several projects on electrodeposition, battery technologies, and solar cell materials.
This curriculum vitae outlines the educational and professional qualifications of Dr. Mahadevaiah. He holds a Ph.D. in Polymer Science from 2009 and has over 6 years of research experience. His areas of research interest include biodegradable polymers, conducting polymers, and silk films. He has published over 30 research papers in international and national journals and presented over 20 papers at conferences. He is currently a research associate studying polymer blends and composites.
Charge Transport in organic semiconductorsTauqueer Khan
This document summarizes research on synthesizing cadmium telluride (CdTe) nanocrystals directly within a poly(3-hexylthiophene) (P3HT) matrix for use in photovoltaic devices. The in situ growth improves the polymer-nanoparticle interface facilitating efficient charge transfer. Spectral results suggest CdTe forms a charge transfer complex with P3HT via dipole-dipole interaction. Structural studies show CdTe facilitates charge transport pathways between polymer chains. Photovoltaic devices using P3HT-CdTe nanocomposites demonstrated enhanced current density and open circuit voltage compared to P3HT:PCBM devices due to increased energy level offset between donor and
This document discusses the use of titanium dioxide nanomaterials in photovoltaic applications. It begins by introducing the properties and polymorphs of titanium dioxide. The main sections then summarize the use of titanium dioxide nanomaterials in different types of solar cells, including dye-sensitized solar cells, polymer-inorganic hybrid solar cells, quantum dot-sensitized solar cells, inorganic solid-state solar cells, and perovskite solar cells. For each application, it provides a brief introduction to the solar cell type and discusses how nanostructured titanium dioxide materials can improve device performance through increased surface area and modulation of interfacial charge transfer kinetics.
Organic solar cells the exciting interplay of excitons and nano-morphologyvvgk-thalluri
1) The document summarizes organic solar cells, which use a bulk heterojunction of a conjugated polymer donor and fullerene acceptor. When light is absorbed, excitons are formed that must dissociate at the donor-acceptor interface into free charges.
2) The bulk heterojunction morphology, consisting of an interpenetrating network of the donor and acceptor materials, allows more excitons to dissociate since the interface is throughout the volume. This leads to higher efficiencies than simple bilayer cells.
3) Efficiencies of over 6% have been achieved but further work is needed to improve stability and lower costs for organic solar cells to become commercially viable. Optimization of
Impact of Gamma Irradiation on Structural and Dielectric Properties of CuI-PV...iosrjce
IOSR Journal of Applied Physics (IOSR-JAP) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of physics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in applied physics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Dr. M. Jayalakshmi is an electrochemist with over 20 years of experience in materials synthesis and characterization. She has worked on projects related to electrode materials for batteries and supercapacitors. Her background includes electroplating, electroless plating, and synthesis of transition metal oxides, sulfides, and lithium metal oxides. She is currently a Principal Scientist at NFTDC in India, where she leads several projects on electrodeposition, battery technologies, and solar cell materials.
This curriculum vitae outlines the educational and professional qualifications of Dr. Mahadevaiah. He holds a Ph.D. in Polymer Science from 2009 and has over 6 years of research experience. His areas of research interest include biodegradable polymers, conducting polymers, and silk films. He has published over 30 research papers in international and national journals and presented over 20 papers at conferences. He is currently a research associate studying polymer blends and composites.
Charge Transport in organic semiconductorsTauqueer Khan
This document summarizes research on synthesizing cadmium telluride (CdTe) nanocrystals directly within a poly(3-hexylthiophene) (P3HT) matrix for use in photovoltaic devices. The in situ growth improves the polymer-nanoparticle interface facilitating efficient charge transfer. Spectral results suggest CdTe forms a charge transfer complex with P3HT via dipole-dipole interaction. Structural studies show CdTe facilitates charge transport pathways between polymer chains. Photovoltaic devices using P3HT-CdTe nanocomposites demonstrated enhanced current density and open circuit voltage compared to P3HT:PCBM devices due to increased energy level offset between donor and
This document discusses the use of titanium dioxide nanomaterials in photovoltaic applications. It begins by introducing the properties and polymorphs of titanium dioxide. The main sections then summarize the use of titanium dioxide nanomaterials in different types of solar cells, including dye-sensitized solar cells, polymer-inorganic hybrid solar cells, quantum dot-sensitized solar cells, inorganic solid-state solar cells, and perovskite solar cells. For each application, it provides a brief introduction to the solar cell type and discusses how nanostructured titanium dioxide materials can improve device performance through increased surface area and modulation of interfacial charge transfer kinetics.
Organic solar cells the exciting interplay of excitons and nano-morphologyvvgk-thalluri
1) The document summarizes organic solar cells, which use a bulk heterojunction of a conjugated polymer donor and fullerene acceptor. When light is absorbed, excitons are formed that must dissociate at the donor-acceptor interface into free charges.
2) The bulk heterojunction morphology, consisting of an interpenetrating network of the donor and acceptor materials, allows more excitons to dissociate since the interface is throughout the volume. This leads to higher efficiencies than simple bilayer cells.
3) Efficiencies of over 6% have been achieved but further work is needed to improve stability and lower costs for organic solar cells to become commercially viable. Optimization of
The effects of ZnO particles on the color homogeneity of phosphor-converted h...IJECEIAES
Color homogeneity is one of the goals to continuously improve WLED. Among the methods for enhancing the color uniformity of WLEDs, improving scattering in phosphor layer is considered to be the most effective. In this paper, ZnO is used for that purpose. The results show that ZnO particle size significantly affects scattering in the phosphor layer, which is a vital factor to analyze scattering, scattering sand surface, scattering coefficient and scattered phase function C sca (D, λ), μ ( λ ) and ρ(θ, λ). In addition, the concentration of ZnO was also analyzed with values from 2% to 22%. Color homogeneity depends not only on size but also on the concentration of added ZnO. Therefore, color homogeneity control is the control of ZnO size and concentration. The proposed result is 10% ZnO for the highest lumen of LED. With 14% and 500 nm of ZnO particles, ΔCCT reaches the lowest. Depending on the production needs, manufacturers can choose the most appropriate way. However, with both required lumen and ΔCCT, 14% ZnO is suitable for ZnO sizes. sca
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).
Water-splitting photoelectrodes consisting of heterojunctions of carbon nitri...Pawan Kumar
Quinary and senary non-stoichiometric double perovskites such as Ba2Ca0.66Nb1.34−xFexO6−δ (BCNF) have been utilized for gas sensing, solid oxide fuel cells and thermochemical CO2 reduction. Herein, we examined their potential as narrow bandgap semiconductors for use in solar energy harvesting. A cobalt co-doped BCNF, Ba2Ca0.66Nb0.68Fe0.33Co0.33O6−δ (BCNFCo), exhibited an optical absorption edge at ∼800 nm, p-type conduction and a distinct photoresponse up to 640 nm while demonstrating high thermochemical stability. A nanocomposite of BCNFCo and g-C3N4 (CN) was prepared via a facile solvent-assisted exfoliation/blending approach using dichlorobenzene and glycerol at a moderate temperature. The exfoliation of g-C3N4 followed by wrapping on perovskite established an effective heterojunction between the materials for charge separation. The conjugated 2D sheets of CN enabled better charge migration resulting in increased photoelectrochemical performance. A blend composed of 40 wt% perovskites and CN performed optimally, whilst achieving a photocurrent density as high as 1.5 mA cm−2 for sunlight-driven water-splitting with a Faradaic efficiency as high as ∼88%.
Polymeric carbon nitride-based photocatalysts for photoreforming of biomass d...Pawan Kumar
Photoreforming of biomass to value-added chemicals and fuels is a chemical approach to extract photosynthetically-trapped energy in complex biomolecules which otherwise disintegrate naturally in the environment. Designing precise photocatalytic materials that can selectively break the sturdy, nature-designed biomass with multiplex chemical composition/bonding and inaccessible sites is central to deploying this technology. Polymeric carbon nitride (CN) comprised of a 2D network of condensed heptazine/triazine (C6N7/C3N3) core has shown great promise for photoreforming of biomass derivatives due to intriguing physicochemical and optical properties. This review comprehensively summarizes the state-of-the-art applications of CN-based photocatalysts for the conversion of lignocellulosic biomass derivatives. Various chemical and structural modifications in CN structure such as doping, surface functionalization, hybridization entailing to higher selectivity and conversion have been discussed aiming at providing valuable guidance for future CN-based materials design.
IRJET-A Review on Utilization of Waste Heat from Automobile Based on Thermoel...IRJET Journal
This document discusses using metal-doped zinc oxide nanoparticles for water treatment in industries. It begins by introducing zinc oxide nanoparticles and the need to dope them with metals like magnesium to modify their properties. It then describes how magnesium-doped zinc oxide nanoparticles were synthesized using a sol-gel method. Characterization of the nanoparticles showed they were uniform in size and distribution. Experiments were conducted using these nanoparticles to degrade methylene blue dye in water via a photocatalytic process when exposed to light. The mechanism of photocatalysis is explained where light generates electron-hole pairs that initiate degradation reactions on the nanoparticle surfaces. The goal is to use this process to treat wastewater from industries in an efficient and environmentally friendly
The document describes a solar power battery charger circuit that uses a parallel-loaded resonant converter. Key points:
- The circuit consists of a boost converter between the solar panels and battery charger to stabilize the current, and a resonant tank and switching device in the battery charger circuit.
- The switching frequency is higher than the resonant frequency, allowing zero-voltage switching to improve efficiency.
- The continuous current conduction mode divides operation into four modes depending on switch and diode conduction. Waveforms and equivalent circuits are shown for each mode.
- Equations are derived for each operating mode based on the equivalent circuits to analyze current and voltage. Parameters can then be determined and simulation carried out.
This curriculum vitae provides information about Trung-Dung Dang, including his present position as a lecturer at Hanoi University of Science and Technology in Vietnam. It details his education qualifications including a Ph.D from Kyungpook National University in South Korea. His research interests involve nano material fabrication and microfluidic device fabrication. He has over 20 publications in journals and 5 patent applications.
Acceptor–donor–acceptor small molecules based on derivatives of 3,4-ethylened...Boniface Y. Antwi
Simple EDOT based photo-active molecules have been synthesised by fewer synthetic steps. The molecules separately acted as donor units in organic solar cells fabrications. Best device efficiency was 1.36%.
introduction to DSSC, Principle and working of DSSC,Component involved in DSSC, how does DSSC work?,Advantage and disadvantage of DSSC, application of DSSC.
This document discusses the performance of dye-sensitized solar cells that use different types of titanium dioxide photoelectrodes. Nanocrystalline and nanotube anatase TiO2 photoelectrodes were fabricated using a hydrothermal technique and their morphological characteristics were analyzed using scanning electron microscopy. The nanotube-based dye-sensitized solar cell was found to have a higher efficiency of 7.28% compared to the 6.6% efficiency of the nanocrystalline anatase-based cell, as measured by current density-voltage curves and incident photon to current conversion efficiency spectra. The nanotube structure allows for illumination from both the front and back sides.
Design and Simulation of Dye Sensitized Solar Cell as a Cost-Effective Alt...Scientific Review SR
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.
This document discusses photoelectrochemical water splitting for hydrogen production. It describes the process which uses a photoelectrode to drive the oxidation of water at the anode and the concurrent reduction of protons at the cathode to produce hydrogen gas. Issues with the technology include high costs of production compared to natural gas, slow oxygen evolution kinetics, and challenges associated with transporting and storing the gases produced. The document then reviews current research trends focused on developing new photoelectrode materials like metal oxides, improving material morphologies at the nano-scale, and investigating techniques like electrospinning to produce novel structures with improved performance.
A dye sensitized solar cell (DSSC) functions by using light absorbing dye molecules to convert sunlight into electricity through photovoltaic processes. When light is absorbed by the dye, electrons are injected into the conduction band of a nanostructured titanium dioxide layer. The electrons then travel through an external circuit, generating electricity, and are collected by a counter electrode. The oxidized dye is regenerated by electron donation from an electrolyte, allowing the process to repeat continuously. DSSCs have the advantages of being relatively inexpensive, flexible in design, and using natural dyes, making them a promising solar technology.
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,
Photochemical study of micelles in photogalvanic cell for solar energy converIAEME Publication
- The document describes a study of a photogalvanic cell containing Rhodamine 6G, EDTA, and sodium lauryl sulfate (NaLS) for solar energy conversion and storage.
- Key results include a maximum photopotential of 905.0 mV, photocurrent of 450.0 μA, conversion efficiency of 1.26%, fill factor of 0.2516, and storage capacity of 170 minutes under illumination for 140 minutes.
- The effects of varying the concentrations of dye, reductant, and micelles were investigated, finding optimal values that produced the highest electrical outputs from the cell. Other parameters such as pH, diffusion length, and electrode area were also examined.
Dr. Amit Kumar has extensive experience in chemistry, including a Ph.D. in Chemistry and positions teaching chemistry. He has published 36 papers in international journals, guided many students in projects, and currently works on developing magnetically recoverable nanocomposites for environmental remediation and biological applications.
This document discusses the fabrication of a dye-sensitized solar cell using extracts from unripe mango peels as the photosensitizer. Key points:
- A DSSC was fabricated using a platinum-coated counter electrode, titanium dioxide photoelectrode, iodolyte electrolyte, and a natural dye extracted from unripe mango peels.
- The energy conversion efficiency of the fabricated DSSC was measured to be 0.345%. I-V curves and absorption/transmittance spectra were also determined.
- Previous research has achieved efficiencies up to 11% using synthetic dyes or modifications to cell components, but natural dyes offer advantages of low cost,
Come ottenere una consulenza utile per far crescere davvero la tua aziendaVendere 2.0
Ecco qui spiegato come il team di Vendere 2.0 può fornirvi con costi contenuti consulenze utili alla vostra azienda per lo sviluppo commerciale, l'internazionalizzazione, l'organizzazione, la gestione e la comunicazione
There are several options for accommodations in South Korea. Saunas called jimjilbang are the most affordable at $7,000-10,000 won per night and provide basic mats to sleep on and access to hot baths and saunas. Hanok guesthouses offer rooms in traditional Korean homes starting around $10,000 won per night with mattresses on the floor and renovated bathrooms. Hotels range from $200,000-350,000 won on average for standard rooms and provide amenities like breakfast and wifi. Resorts can cost $150,000-600,000 won and include kitchens, pools, and breakfast.
The effects of ZnO particles on the color homogeneity of phosphor-converted h...IJECEIAES
Color homogeneity is one of the goals to continuously improve WLED. Among the methods for enhancing the color uniformity of WLEDs, improving scattering in phosphor layer is considered to be the most effective. In this paper, ZnO is used for that purpose. The results show that ZnO particle size significantly affects scattering in the phosphor layer, which is a vital factor to analyze scattering, scattering sand surface, scattering coefficient and scattered phase function C sca (D, λ), μ ( λ ) and ρ(θ, λ). In addition, the concentration of ZnO was also analyzed with values from 2% to 22%. Color homogeneity depends not only on size but also on the concentration of added ZnO. Therefore, color homogeneity control is the control of ZnO size and concentration. The proposed result is 10% ZnO for the highest lumen of LED. With 14% and 500 nm of ZnO particles, ΔCCT reaches the lowest. Depending on the production needs, manufacturers can choose the most appropriate way. However, with both required lumen and ΔCCT, 14% ZnO is suitable for ZnO sizes. sca
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).
Water-splitting photoelectrodes consisting of heterojunctions of carbon nitri...Pawan Kumar
Quinary and senary non-stoichiometric double perovskites such as Ba2Ca0.66Nb1.34−xFexO6−δ (BCNF) have been utilized for gas sensing, solid oxide fuel cells and thermochemical CO2 reduction. Herein, we examined their potential as narrow bandgap semiconductors for use in solar energy harvesting. A cobalt co-doped BCNF, Ba2Ca0.66Nb0.68Fe0.33Co0.33O6−δ (BCNFCo), exhibited an optical absorption edge at ∼800 nm, p-type conduction and a distinct photoresponse up to 640 nm while demonstrating high thermochemical stability. A nanocomposite of BCNFCo and g-C3N4 (CN) was prepared via a facile solvent-assisted exfoliation/blending approach using dichlorobenzene and glycerol at a moderate temperature. The exfoliation of g-C3N4 followed by wrapping on perovskite established an effective heterojunction between the materials for charge separation. The conjugated 2D sheets of CN enabled better charge migration resulting in increased photoelectrochemical performance. A blend composed of 40 wt% perovskites and CN performed optimally, whilst achieving a photocurrent density as high as 1.5 mA cm−2 for sunlight-driven water-splitting with a Faradaic efficiency as high as ∼88%.
Polymeric carbon nitride-based photocatalysts for photoreforming of biomass d...Pawan Kumar
Photoreforming of biomass to value-added chemicals and fuels is a chemical approach to extract photosynthetically-trapped energy in complex biomolecules which otherwise disintegrate naturally in the environment. Designing precise photocatalytic materials that can selectively break the sturdy, nature-designed biomass with multiplex chemical composition/bonding and inaccessible sites is central to deploying this technology. Polymeric carbon nitride (CN) comprised of a 2D network of condensed heptazine/triazine (C6N7/C3N3) core has shown great promise for photoreforming of biomass derivatives due to intriguing physicochemical and optical properties. This review comprehensively summarizes the state-of-the-art applications of CN-based photocatalysts for the conversion of lignocellulosic biomass derivatives. Various chemical and structural modifications in CN structure such as doping, surface functionalization, hybridization entailing to higher selectivity and conversion have been discussed aiming at providing valuable guidance for future CN-based materials design.
IRJET-A Review on Utilization of Waste Heat from Automobile Based on Thermoel...IRJET Journal
This document discusses using metal-doped zinc oxide nanoparticles for water treatment in industries. It begins by introducing zinc oxide nanoparticles and the need to dope them with metals like magnesium to modify their properties. It then describes how magnesium-doped zinc oxide nanoparticles were synthesized using a sol-gel method. Characterization of the nanoparticles showed they were uniform in size and distribution. Experiments were conducted using these nanoparticles to degrade methylene blue dye in water via a photocatalytic process when exposed to light. The mechanism of photocatalysis is explained where light generates electron-hole pairs that initiate degradation reactions on the nanoparticle surfaces. The goal is to use this process to treat wastewater from industries in an efficient and environmentally friendly
The document describes a solar power battery charger circuit that uses a parallel-loaded resonant converter. Key points:
- The circuit consists of a boost converter between the solar panels and battery charger to stabilize the current, and a resonant tank and switching device in the battery charger circuit.
- The switching frequency is higher than the resonant frequency, allowing zero-voltage switching to improve efficiency.
- The continuous current conduction mode divides operation into four modes depending on switch and diode conduction. Waveforms and equivalent circuits are shown for each mode.
- Equations are derived for each operating mode based on the equivalent circuits to analyze current and voltage. Parameters can then be determined and simulation carried out.
This curriculum vitae provides information about Trung-Dung Dang, including his present position as a lecturer at Hanoi University of Science and Technology in Vietnam. It details his education qualifications including a Ph.D from Kyungpook National University in South Korea. His research interests involve nano material fabrication and microfluidic device fabrication. He has over 20 publications in journals and 5 patent applications.
Acceptor–donor–acceptor small molecules based on derivatives of 3,4-ethylened...Boniface Y. Antwi
Simple EDOT based photo-active molecules have been synthesised by fewer synthetic steps. The molecules separately acted as donor units in organic solar cells fabrications. Best device efficiency was 1.36%.
introduction to DSSC, Principle and working of DSSC,Component involved in DSSC, how does DSSC work?,Advantage and disadvantage of DSSC, application of DSSC.
This document discusses the performance of dye-sensitized solar cells that use different types of titanium dioxide photoelectrodes. Nanocrystalline and nanotube anatase TiO2 photoelectrodes were fabricated using a hydrothermal technique and their morphological characteristics were analyzed using scanning electron microscopy. The nanotube-based dye-sensitized solar cell was found to have a higher efficiency of 7.28% compared to the 6.6% efficiency of the nanocrystalline anatase-based cell, as measured by current density-voltage curves and incident photon to current conversion efficiency spectra. The nanotube structure allows for illumination from both the front and back sides.
Design and Simulation of Dye Sensitized Solar Cell as a Cost-Effective Alt...Scientific Review SR
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.
This document discusses photoelectrochemical water splitting for hydrogen production. It describes the process which uses a photoelectrode to drive the oxidation of water at the anode and the concurrent reduction of protons at the cathode to produce hydrogen gas. Issues with the technology include high costs of production compared to natural gas, slow oxygen evolution kinetics, and challenges associated with transporting and storing the gases produced. The document then reviews current research trends focused on developing new photoelectrode materials like metal oxides, improving material morphologies at the nano-scale, and investigating techniques like electrospinning to produce novel structures with improved performance.
A dye sensitized solar cell (DSSC) functions by using light absorbing dye molecules to convert sunlight into electricity through photovoltaic processes. When light is absorbed by the dye, electrons are injected into the conduction band of a nanostructured titanium dioxide layer. The electrons then travel through an external circuit, generating electricity, and are collected by a counter electrode. The oxidized dye is regenerated by electron donation from an electrolyte, allowing the process to repeat continuously. DSSCs have the advantages of being relatively inexpensive, flexible in design, and using natural dyes, making them a promising solar technology.
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,
Photochemical study of micelles in photogalvanic cell for solar energy converIAEME Publication
- The document describes a study of a photogalvanic cell containing Rhodamine 6G, EDTA, and sodium lauryl sulfate (NaLS) for solar energy conversion and storage.
- Key results include a maximum photopotential of 905.0 mV, photocurrent of 450.0 μA, conversion efficiency of 1.26%, fill factor of 0.2516, and storage capacity of 170 minutes under illumination for 140 minutes.
- The effects of varying the concentrations of dye, reductant, and micelles were investigated, finding optimal values that produced the highest electrical outputs from the cell. Other parameters such as pH, diffusion length, and electrode area were also examined.
Dr. Amit Kumar has extensive experience in chemistry, including a Ph.D. in Chemistry and positions teaching chemistry. He has published 36 papers in international journals, guided many students in projects, and currently works on developing magnetically recoverable nanocomposites for environmental remediation and biological applications.
This document discusses the fabrication of a dye-sensitized solar cell using extracts from unripe mango peels as the photosensitizer. Key points:
- A DSSC was fabricated using a platinum-coated counter electrode, titanium dioxide photoelectrode, iodolyte electrolyte, and a natural dye extracted from unripe mango peels.
- The energy conversion efficiency of the fabricated DSSC was measured to be 0.345%. I-V curves and absorption/transmittance spectra were also determined.
- Previous research has achieved efficiencies up to 11% using synthetic dyes or modifications to cell components, but natural dyes offer advantages of low cost,
Come ottenere una consulenza utile per far crescere davvero la tua aziendaVendere 2.0
Ecco qui spiegato come il team di Vendere 2.0 può fornirvi con costi contenuti consulenze utili alla vostra azienda per lo sviluppo commerciale, l'internazionalizzazione, l'organizzazione, la gestione e la comunicazione
There are several options for accommodations in South Korea. Saunas called jimjilbang are the most affordable at $7,000-10,000 won per night and provide basic mats to sleep on and access to hot baths and saunas. Hanok guesthouses offer rooms in traditional Korean homes starting around $10,000 won per night with mattresses on the floor and renovated bathrooms. Hotels range from $200,000-350,000 won on average for standard rooms and provide amenities like breakfast and wifi. Resorts can cost $150,000-600,000 won and include kitchens, pools, and breakfast.
Este documento describe la investigación como un camino para la innovación educativa. Discute los tipos de investigación educativa, incluyendo la investigación sobre la propia práctica docente como una forma de impulsar el cambio escolar. También analiza las condiciones necesarias para que ocurra la innovación tecnológica y educativa, así como el papel fundamental que deben desempeñar los profesores como investigadores.
[Kelley Frank] Social Media Management Deck (1)Kelley Frank
Kelley Frank provides social media marketing services. She has 10+ years of experience managing professional accounts and building corporate identities online. Her services include community management, content curation, social media guidance, and reporting. She has worked with clients from various industries in multiple countries. Some of her past clients include event promoters, record labels, DJs/producers, and bands.
United Parcel Service (UPS) is a global shipping and business services company founded in 1907 with over $58 billion in annual revenue. The marketing team presented an action plan to address UPS's sustainability goals by redesigning the logo, promoting electric trucks, hosting an Earth Day run, and launching a digital marketing campaign to highlight UPS's sustainability efforts. They also proposed a larger "Plan B" campaign using the Super Bowl and Wall Street Journal to integrate sustainability messaging.
Data visualization is the presentation of data in a visual format to help identify patterns, trends, and correlations. It allows business users to easily understand and apply insights from large amounts of data. The document discusses various data visualization tools like dashboards, graphs, sensitivity modeling, and heat maps that can provide executives actionable insights to inform strategic decisions and drive business performance. These tools simplify complex data and communicate insights across organizations in a visual and easy to understand manner.
Retailer-branded credit card programs can provide significant benefits to retailers, including increased sales, customer loyalty, and wallet share. Case studies show that credit cardholders spend 39-86% more on average annually than non-cardholders. They also visit stores more frequently and have attrition rates that are 75% lower. Retailers can gain insights into customer purchasing behaviors from credit card transaction data to improve marketing. When implemented effectively, retailer credit programs can help drive higher long-term revenues and profits through customer retention and increased spending.
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1. SHYAMALIMA SHARMA
Address: Marathahalli, Bangalore
Hand Phone: 9435358526-7086122812
Email: shyamalimasharma@gmail.com
RESEARCH INTERESTS
Solid state photovoltaics Dye-sensitized solar cells
Polymer nanocomposites Anisotropic nanoparticles
EDUCATION
Qualification Subject Name of
Board/University
Name of the
Institution
Year of
passing
Percentag
e/CGPA
Ph.D. Chemic
al
Sciences
Tezpur University Tezpur
University
2016
Thesis
submitte
d
8.71
Thesis Title: Development of polymer nanocomposite based photovoltaic devices
with improved efficiency
M.Sc. Nanoscienc
e and Tech.
Tezpur
University
Tezpur
University
2010 7.4
Dissertation Title: Polypyrrole-silver coated styrene/ methyl acylate with core shell
morphology with increasing mechanical and thermal stability.
B.Sc. Chemistry Gauhati
University
Biswanath
College
2008 56.6%
H.S.S.L.C. Science AHSEC Madhabdev
College
2005 66.8%
H.S.L.C. SEBA Lohit Dikrong
H.S. School
2003 81.8%
2. RESEARCH EXPERIENCE
1. Project Undertaken in M.Sc. Dissertation “Polypyrrole-silver coated
styrene/methyl acrylate with core shell morphology with increasing
mechanical and thermal stability”.
2. Junior Research Fellow, in a DAE sponsored project entitled “Development of
nano-composite material based organic-inorganic hybrid flexible solar cell by
magnetron sputtering and plasma polymerization combined process”, in
Institute of Advanced Study in Science and Technology (IASST), Guwahati,
Assam.
Period: 2010-2011, Duration: 13 months.
• Deposition of composite thin film of polyaniline/TiO2 (PAni/TiO2) were carried out
by a combined process of magnetron sputtering and plasma polymerization at a
pressure of 5 × 10-2 Torr using titanium as target material for sputtering, aniline as
monomer, oxygen as reactive gas and argon as carrier gas/ion source for
sputtering.
• The ultraviolet (UV) photo-stability of the composite film were studied by exposing
the film deposited on silicon substrate for different reaction times up to one hour
under UV radiation at wave length range of 280-400 nm with intensity 0.4
mW/cm2.
• An organic/inorganic nanocomposite film based photovoltaic device was
developed. The device has an aluminium/composite/indium tin oxide
sandwiched structure that shows strong photo response in ultraviolet region and
hence the device has potential for application as an UV detector.
2. Ph.D. student, at Tezpur University, Tezpur, Assam.
Period: 2011-2016.
Thesis title: Development of polymer nanocomposite based photovoltaic
devices with improved efficiency.
Synopsis in brief:
Zinc oxide (ZnO) nanorods of aspect ratio 8-20 were synthesized by a standard
hydrothermal method and incorporated into a conducting polymer, poly(9-
vinylcarbazole) (PVK) matrix.
A set of bulk heterojunction (BHJ) solar cells was fabricated by using the
synthesized nanocomposites as the active layer and the device performance
of the solar cells was carried out under simulated (AM1.5) solar illumination at 1
sun (100 mW/cm2) in laboratory air.
Maximum photo conversion efficiency (PCE) of 0.44% was achieved with the
nanorods of aspect ratio 20.
Au nanorods of aspect ratio 2-3.5 were synthesized by a seeded growth
method and incorporated into PVK matrix.
A set of BHJ solar cells was fabricated by using the synthesized PVK/Au
nanocomposites as the active layer.
3. Maximum PCE of 1.45% was achieved with the nanorods of aspect ratio 3.5.
Poly(3-octylthiophene) (P3OT)/ZnO nanocomposites were synthesized by
incorporating ZnO nanorods of aspect ratio 8-20 into P3OT matrix.
The synthesized P3OT/ZnO nanocomposites were used as the active layer in a
set of BHJ solar cells.
Maximum PCE of 1.33% was achieved with the nanorods of aspect ratio 20.
Au nanorods of aspect ratio 2-3.5 were immobilized into gelatin hydrogel.
The synthesized Au/gelatin nanocomposites were used as the gel electrolyte in
a set of quasi solid state dye sensitized solar cells (DSSCs).
Maximum PCE of 1.98% was achieved with the nanorods of aspect ratio 3.5 at
a concentration of 0.04%.
ZnO nanorods (aspect ratio 8-20) were synthesized by a standard hydrothermal
method.
Multiwalled carbon nanotubes (MWCNTs) were immobilized into gelatin
hydrogel.
A set of quasi solid state DSSCs was fabricated by using the synthesized
MWCNT/gelatin as the gel electrolyte and the ZnO nanorods as the
photoanodes.
Maximum PCE of 1.35% was achieved for nanorods of aspect ratio 20 at a
MWCNT concentration of 0.2% in the gel electrolyte.
Worked as a Junior Research Fellow, in a DeitY sponsored project entitled
“Development of polymer nanocomposite based photovoltaic devices with improved
efficiency”, during Ph.D. period.
Period: 2013-2016, Duration: 3 yrs 3 months.
COMPUTER SKILLS
Operating Systems: Windows 7-10, Windows XP
Scientific Applications: Origin 6.0, Origin 8.5
Technical Drawing: Adobe PhotoShop.
Office Applications: Microsoft PowerPoint, Excel, Word.
AWARDS
1. Awarded the best oral presentation in National Seminar on ‘Recent Advances In
Polymer Science and Technology’ (Poly-2012) held at Department of Chemistry,
North Bengal University, Darjeeling, West Bengal, from Nov 2-4, 2012.
2. State merit scholarship holder.
4. List of publications:
1. S. Sharma, P.J. Bora, P. Gogoi, R. Boruah, K.J. Mohan, S.K. Dolui, Plasmonic bulk
heterojunction photovoltaic devices based on poly (9-vinylcarbazole)/gold
nanocomposites: effect of aspect ratio of gold nanorods, J Mater Sci: Mater
Electron 2015, 26, 5465-5474.
2. S. Sharma, P. Gogoi, R. Bhargav, S.K. Dolui, A. Patra, Hybrid Bulk Heterojunction
Solar Cells Based on Poly (9-Vinylcarbazole)/Zinc Oxide Nanocomposites: Effect
of Aspect Ratio of Zinc Oxide Nanorod, J. Polym. Mater. 2015, 32 (2), 179-196.
3. S. Sharma, M. Khannam, M. Boruah, B.C. Nath, S.K. Dolui, Development of Dye-
Sensitized Solar Cells Based on Gold/Gelatin Gel Electrolyte: Effect of Different
Aspect Ratio of Gold Nanocrystals, IEEE J. Photovolt. 2015, 5 (6), 1665-1673.
4. S. Sharma, M. Khannam, S.K Dolui, A Quasi Solid State Dye Sensitized Solar Cell
based on Gelatin/Multiwalled Carbon Nanotube Gel Electrolyte and ZnO
Nanorod Photoanode, J. Mater. Sci.: Mater. Electron. (Just accepted-DOI:
10.1007/s10854-016-4777-x)
5. S. Sharma, A.K. Manhar, P.J. Bora, S.K. Dolui, M. Mandal, Evaluation of antioxidant
and antibacterial activity of various aspect ratio gold (Au) nanorods, Adv. Mater.
Lett. 2015, 6(3), 235-241.
6. S. Sharma, P.J. Bora, M. Boruah, S.K. Dolui, Gelatin-Immobilized High Aspect Ratio
Gold Nanocrystals: An Efficient Catalyst for 4-Nitrophenol Reduction, Adv. Polym.
Tech., DOI 10.1002/adv.21608.
7. S. Sharma, P. Gogoi, B.J. Saikia, S.K. Dolui, Synthesis of cadmium sulfide quantum
dots with simultaneous desulfurization of kerosene oil, J. Renew. Mater. (In press).
8. S. Sharma, S.K. Dolui, Enhanced photo conversion efficiency of a hybrid bulk
heterojunction device based on poly(3-octylthiophene)/zinc oxide
nanocomposite, (Communicated).
9. P. Gogoi, M. Boruah, S. Sharma, S.K. Dolui, Blends of epoxidized alkyd resins
based on jatropha oil and the epoxidized oil cured with aqueous citric acid
solution -A green technology approach. ACS Sus. Chem. Eng. 3 (2015) 261-268.
10. P. Gogoi, D. Das, S. Sharma, S.K. Dolui, Synthesis and characterization of Jatropha
curcas oil based alkyd resins and their blends with epoxy resin. J. Renew. Mater. 3
(2) (2015) 151-159.
11. M. Boruah, M. Mili, S. Sharma, B. Gogoi, S.K. Dolui, Synthesis and evaluation of
swelling kinetics of electric field responsive poly (vinyl alcohol)‐g‐polyacrylic
acid/OMNT nanocomposite hydrogels. Polymer Composites, 2015 36(1), 34-41.
12. B. C. Nath, B. Gogoi, M. Boruah, S. Sharma, M. Khannam, G. A. Ahmed, S.K. Dolui,
High performance polyvinyl alcohol/multi walled carbon nanotube/polyaniline
5. hydrogel (PVA/MWCNT/PAni) based dye sensitized solar cells, Electrochimica
Acta, (2014) 146, 106-111.
13. B.J. Saikia, P. Gogoi, S. Sharmah, S.K. Dolui, Synthesis of pH‐and solvent‐responsive
smart core crosslinked star polymer by atom transfer radical polymerization,
Polymer International, (2015) 64(3), 437-445.
14. , L.J. Borthakur, S. Sharma, S.K. Dolui, J. Mater Studies on Ag/Polypyrrole
composite deposited on the surface of styrene-methyl acrylate copolymer micro
particles and their electrical and electrochemical properties. Sci: Mater. Electron.
22, (2011), 949-958.
15. M. Khannam, S. Sharma, P. Gogoi, S.K. Dolui, J Mater Enhanced conversion
efficiency of quasi solid state dye sensitized solar cells based on functionalized
multi-walled carbon nanotubes incorporated TiO2 photoanode, Sci: Mater
Electron (Just accepted-DOI 10.1007/s10854-016-5072-6).
16. M. Khannam, S. Sharma, S.K. Dolui A graphene oxide incorporated TiO2
photoanode for high efficiency quasi solid state dye sensitized solar cells based
on a poly-vinyl alcohol gel electrolyte, , RSC Adv. 6, (2016), 55406-55414.
17. S. Sharma, A.R. Pal, J. Chutia, H. Bailung, N.S. Sarma, N.N. Dass, D. Patil, Plasma
process for development of a bulk heterojunction optoelectronic device: A
highly sensitive UV detector, Appl. Surf. Sci. 258, (2012), 7897-7906.
18. A.A. Hussain, S. Sharma, A.R. Pal, H. Bailung, J. Chutia, D.S. Patil, Role of Plasma
Parameters on the Conjugated Structure Retention in Polyaniline Thin Film,
Plasma Chem. Plasma Process. 32, (2012), 817-832.
Papers presented in academic conferences:
1. S. Sharma, S.K. Dolui, Oral presentation entitled ‘Poly (9-vinylcarbazole)-Zinc
Oxide (PVK-ZnO) Nanocomposite: Synthesis and Property Evaluation’, POLY-2012,
Prof. Sukumar Maiti Polymer Award Foundation (PSMPAF), Kolkata, West Bengal,
Nov. 2012.
2. S. Sharma, B.J. Saikia, S.K. Dolui, Poster presentation entitled ‘Development of
Ag/Polypyrrole Composite Deposited Styrene-Methyl Acrylate Copolymer Micro
Particles with Core-Shell Morphology and Study of Their Electrical and
Electrochemical Properties’, NCCCTS-2011, Dept. of Chemical Sciences, Tezpur
University, Assam, Nov. 2011.
3. S. Sharma, S.K. Dolui, Poster presentation entitled ‘Gold/gelatin gel electrolyte
based dye-sensitized solar cells: Effect of different aspect ratio of gold
nanocrystals’, ICNPM-2015, International and Inter University Centre for
Nanoscience and Nanotechnology (IIUCNN), Mahatma Gandhi University,
Kottayam, Kerala, Nov. 2015.
6. 4. S. Sharma, S.K. Dolui, Poster presentation entitled ‘Quasi solid state dye-sensitized
solar cells based on Gold/gelatin gel electrolyte’, CDCS-2015, Dept. of Chemical
Sciences, Tezpur University, Assam, Nov 2015.
5. Participated in ‘International Congress on Renewable Energy’ (ICORE 2011),
Dept. of Energy, Tezpur University, Assam, Nov 2011.
6. Participated in ‘Science Academies Lecture Workshop on Modern Trends in
Chemistry’, Dept. of Chemical Sciences, Tezpur University, Assam, Nov 2013.
HIGHLIGHTS OF QUALIFICATIONS
• Thirteen months research experience as a Junior Research Fellow
(JRF), in a DAE sponsored project in Institute of Advanced Study in
Science and Technology (IASST), Guwahati, Assam.
• Three year research experience as a Junior Research Fellow (JRF), in a
DeitY sponsored project in Tezpur University.
• Familiar with both bulk heterojunction (BHJ) and dye-sensitized solar cell
fabrication.
• Sufficient knowledge in handling instruments like UV-visible spectroscopy,
Photoluminescence (PL), Digital sourcemeter, Electrochemical
Impedance analyzer etc.
• Expertise in Origin, Photoshop, Microsoft office.
Master Degree Courses:
Quantum Mechanics Electronics
Computational Techniques Basic Polymer Science
Cell and Molecular Architecture of
Cells
Statistical Physics
Condensed Matter Physics Nanostructures
Fundamentals of Molecular Biology
and Elements of Immunology
Instrumental Methods of
Analysis
Surface Science Optical Properties of
Nanostructures
Electrical and Magnetic Properties of
Nanostructures
Biosynthesis of
Nanoparticles and
Applications
Title of M.Sc. Dissertation: Development of Poly (styrene-co-methylacrylate) and
Polypyrrole-Silver Nanocomposite with Core-Shell Morphology
7. REFERENCES
Prof. Swapan K. Dolui, Ph.D.
Dept. of Chemical Sciences
Tezpur University
Napaam, Tezpur
Assam-784028
Email:dolui@tezu.ernet.in
Telephone: 9957198489
Prof. Dolui is my Ph.D. supervisor.
Personal Particulars:
Fathers Name: Sri M. SHARMA
Date of Birth: 30TH Sept 1987
Sex: Feale
Marital Status: Single
Nationality: Indian
Language Known English, Hindi, Assamese
Place: Bangalore
Date: Shyamalima Sharma