Crystalline silicon solar cells are the most commonly used type of solar cells, representing about 85% of global PV production. They work by converting sunlight into electricity via the photovoltaic effect using silicon wafers or ingots. The three main types are monocrystalline, polycrystalline, and amorphous silicon solar cells. Research is ongoing to improve efficiency and reduce costs through techniques like reducing wafer thickness and developing selective contacts. Crystalline silicon solar cells have efficiencies up to 25% in the lab and 18-22% commercially, and see wide use in applications from consumer electronics to utility-scale solar farms.
The most common type of solar cells are Photovoltaic Cells (PV cells)
Converts sunlight directly into electricity
Cells are made of a semiconductor material (eg. silicon)
Light strikes the PV cell, and a certain portion is absorbed
The light energy (in the form of photons) knocks electrons loose, allowing them to flow freely, forming a current
Metal contacts on the top and bottom of PV cell draws off the current to use externally as power
The most common type of solar cells are Photovoltaic Cells (PV cells)
Converts sunlight directly into electricity
Cells are made of a semiconductor material (eg. silicon)
Light strikes the PV cell, and a certain portion is absorbed
The light energy (in the form of photons) knocks electrons loose, allowing them to flow freely, forming a current
Metal contacts on the top and bottom of PV cell draws off the current to use externally as power
Solar cell is the device that converts energy of light directly into electrical energy (electricity) by photovoltaic effect In general, a solar cell that includes both solar and non solar sources of light
(such as photons from incandescent bulbs) is termed a photovoltaic cell. Solar cell is also know as photovoltaic cell
Most familiar solar cells are based on the effect
of photovoltaic In this effect, light falling on semiconductor device of the two layer produces a potential difference or photo voltage between the layers The voltage thus produced can drive a current through an external circuit producing useful work
Huge demand of silicon in photovoltaic cells caused a shortage of silicon which results in demand
for new technology in this field and so another revolutionary cheap method is innovated namely thin film solar
cell. In this paper, various types of thin film solar cells are reviewed. They have less efficiency and also low cost
compared to 1st generation solar cell. They are based on silicon Thin film implies that less material is used
which makes the solar cells cheaper.
A solar cell is an electrical device that converts the energy of light directly into electricity
The first practical photovoltaic cell was publicly demonstrated on April 25, 1954 at Bell Laboratories.
From 2002 we can see the modern solar cell.
This ppt gives you the basic introduction, talks about it's inception, the basic physics behind it and mainly the fabrication process and after that it discusses the uses and future prospects of it.
the solar panels are the primary source of the solar equipment which helps in trapping the solar energy. the performance of the solar panels vary. check the types of solar panles in these slides
Solar cell is the device that converts energy of light directly into electrical energy (electricity) by photovoltaic effect In general, a solar cell that includes both solar and non solar sources of light
(such as photons from incandescent bulbs) is termed a photovoltaic cell. Solar cell is also know as photovoltaic cell
Most familiar solar cells are based on the effect
of photovoltaic In this effect, light falling on semiconductor device of the two layer produces a potential difference or photo voltage between the layers The voltage thus produced can drive a current through an external circuit producing useful work
Huge demand of silicon in photovoltaic cells caused a shortage of silicon which results in demand
for new technology in this field and so another revolutionary cheap method is innovated namely thin film solar
cell. In this paper, various types of thin film solar cells are reviewed. They have less efficiency and also low cost
compared to 1st generation solar cell. They are based on silicon Thin film implies that less material is used
which makes the solar cells cheaper.
A solar cell is an electrical device that converts the energy of light directly into electricity
The first practical photovoltaic cell was publicly demonstrated on April 25, 1954 at Bell Laboratories.
From 2002 we can see the modern solar cell.
This ppt gives you the basic introduction, talks about it's inception, the basic physics behind it and mainly the fabrication process and after that it discusses the uses and future prospects of it.
the solar panels are the primary source of the solar equipment which helps in trapping the solar energy. the performance of the solar panels vary. check the types of solar panles in these slides
HOW SHOULD ONE CHOOSE BETWEEN MONOCRYSTALLINE AND MULTICRYSTALLINE PANELS?Vikram Solar
HOW SHOULD ONE CHOOSE
BETWEEN MONOCRYSTALLINE AND
MULTICRYSTALLINE PANELS?
but are confused about which type to opt for, you’re in the right place.
There’s a myriad of variables to take into account when you are investing in a
solar energy system – our job at Vikram Solar is to help you sort through them!
When it comes to choosing the most appropriate photovoltaic solar panels
for your business, you are faced with countless choices regarding quality,
performance, and price. Let’s start by considering the benefits and comparing
the different types of solar panels currently available.
Sustainable Solar Power-The Solution to Providing Energy for Low Cost HousingEES Africa (Pty) Ltd
South Africa faces an immense challenge to address the backlog in the construction and delivery
of quality, low cost housing. While there are a number of initiatives underway, there is said to be a
backlog of some 2.3 million houses. Integral to the construction of these houses is the provision of
energy for basic needs. Solar technology is a cost-effective solution for providing energy to low cost houses.
Building Integrated Photovoltaic Solar Glazing, Current & Emerging TechnologiesGavin Harper
Presentation at the Low Carbon Research Institute Conference, Cardiff, SWALEC Stadium, 18th November 2014 on Building Integrated Photovoltaics Solar Glazing:Current & Emerging Technologies
Similar to Crystalline Silicon Solar Cells.pptx (20)
The term "alternative energy" generally refers to sources of energy like solar power, wind power, and hydropower. These are non-polluting, renewable resources that represent an alternative to traditional fossil fuel sources like coal, oil, and natural gas.
Hardness measurement | Material Science and MetallurgyPeeyush Mishra
In this presentation, we are going to learn about hardness, hardness measurement, Brinell Hardness, Rockwell Hardness, Vicker's Hardness, Moh's hardness, etc
This presentation will explain everything about iron. From it's general properties to types of iron to rust to iron carbon phase diagram to applications of iron.
In this presentation, I have tried to discuss about entropy. It has been designed in such a way that it'll be helpful for anyone who's interested in thermodynamics.
Classification of Nanostructures by Peeyush MishraPeeyush Mishra
In this presentation, I have tried to define Nanostructures and discuss various types of Nanostructures. I have also compared the ways in which Nanomaterials can be synthesized.
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.
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Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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.
2. Contents
● Overview
● Functioning & Structure of Silicon Solar Cells
● Types of Silicon Solar Cells
● Production of Silicon Solar Cells
● Merits and Demerits of Silicon Solar Cells
● Efficiency of Silicon Solar Cells
● Future Prospects & Challenges of Silicon Solar Cells
● Applications of Silicon Solar Cells
● References
2
3. “Crystalline silicon solar cells have high
efficiency, making crystalline silicon
photovoltaics an interesting technology
where space is at a premium.”
3
5. Crystalline silicon photovoltaic (PV)
cells are used in the largest quantity of
all types of solar cells on the market,
representing about 85% of the world
total PV cell production in 2011.
Overview
5
6. ● Silicon is the most popular PV material
● Most cells are made from leftover computer
chip manufacturing
● Silicon must be refined to almost 100%
purity
● The uniform molecular structure of silicon
makes it efficient for electric transport
● Silicon wafers are cut from ingots
Overview
6
7. ● Sharp Electronic Corporation
● Sanyo
● Bp Solar
● Shell
● Sunwise
● Uni-Solar
● Astro Power
Manufacturers
7
https://www.pv-magazine.com/2018/07/20/top-10-crystalline-pv-module-manufacturer-ranking/
9. A silicon solar cell works the same way as other types of solar
cells. When the sun rays fall on the silicon solar cells within
the solar panels, they take the photons from the sunlight
during the daylight hours and convert them into free electrons.
The electrons pass through the electric wires and supply
electric energy to the power grid. The direct current from the
sunlight is transformed into alternating current within a solar
inverter. It is then made to pass through the cables to charge
different devices and appliances.
Functioning
9
10. Structure
Typical mono- and polycrystalline
silicon solar cells (upper), and
simplified cross-section of a
commercial monocrystalline silicon
solar cell (lower)
10
https://www.nature.com/articles/am201082
14. Amorphous
Silicon Solar
Cell
● Most significant thin film variant
● High absorption capacity
● Maximum Efficiency of 13%
● Cheapest
● Ideal for charging small electronic
gadgets- calculator and watches
● Simple design- can be deposited on
glass and plastic
14
16. Czochralski
Process
● For monocrystalline silicon PV cell
production
● This is the process of creating an ingot
● A small single silicon rod is placed in
an inert gas at high temperature
● When the seed is rotated up and out
silicon adheres to it and forms an ingot
16
https://www.sciencephoto.com/media/482610/view/czochralski-silicon-crystal-growth
17. Siemens
Process
● For multicrystalline silicon PV cell
production
● Made from metallurgical grade Silicon
by a chemical purification method
● Involves distillation of volatile silicon
compounds and its decomposition at a
high temperature
17
https://www.schunk-carbontechnology.com/en/products/produkte-detail/siemens-process
20. ● Maturity: Considerable amount of information on
evaluating the reliability and robustness of the design,
which is crucial to obtaining capital for deployment
projects.
● Performance: Offers higher efficiencies than any other
mass-produced single-junction device. Higher efficiencies
reduce the cost of the final installation because fewer
solar cells need to be manufactured and installed for a
given output.
● Reliability: Reaches module lifetimes of 25+ years and
exhibit little long-term degradation.
● Abundance: Silicon is the second most abundant element
in Earth's crust (after oxygen)
Merits
20
21. ● Non-Toxic
● Cost Effective
● Good Photoconductivity
● Light weight
● Resistant to corrosion and does not rust easily.
● Handles intense sunlight and high temperatures.
● Low maintenance.
● Can be placed in solar panels and used for residential,
commercial, and industrial applications.
Merits
21
22. ● Heavily reliant on weather.
● Humongous space needed to store and accommodate
them.
● Installation cost is higher than those of electrical
systems.
● Demonstrates intermittent problems.
● Users need to purchase batteries and inverters
separately to convert solar energy into electric energy
and save the excess for later use.
Demerits
22
24. ● Crystalline Silicon PV cells have laboratory
conversion efficiency of:
○ 25% for single crystal cells
○ 20% for multicrystalline cells
○ 13% for amorphous cells
● However, industrially produced solar modules
currently achieve efficiencies ranging from 18-
22% under standard test conditions
Efficiency
24
26. Efficiency
Efficiency of various
solar cells over the
years presented by
NREL
26
https://www.prostarsolar.net/blog/evaluating-solar-panels-efficiency.html
27. Efficiency
Simulation of the solar
cell efficiency of a
double-junction solar
cell as a function of
light concentration at a
temperature of 320 K.
27
https://www.researchgate.net/figure/Efficiency-as-a-function-of-solar-concentration-for-a-mono-crystalline-silicon-solar-cell_fig1_221929091
29. ● Efforts being focused on innovative ways to
reduce costs
● R&D being done to reduce raw material
requirements ,including pioneering ultra-thin
crystalline silicon absorber layers, developing
kerf-free wafer production techniques and
optimizing growth processes.
Current Research
29
30. Developments
Reduction of silicon wafer
thickness
30
https://www.researchgate.net/figure/Efficiency-e-as-a-function-of-the-solar-cell-thickness-W-for-n-type-silicon-solar-
cells_fig30_327467751
31. ●Selective front diffusions
●Localized back contacts and dielectric back surface
passivation
●Metallization
●Wafer crystallinity and conductivity type
Increasing efficiency
31
32. Due to the usage of pricey and high-quality silicon in
manufacturing, silicon solar panels used to be extremely expensive.
Additionally, the cost of purifying silicon cells was also high.
But as technology advanced, low-cost silicon materials made it
possible to produce affordable silicon cells. Government subsidies
have also contributed to decreasing the overall cost.
Customers must contact the manufacturers to find the exact price
before making a purchase. The cost of a silicon solar cell can alter
based on the number of cells used and the brand
Costs
32
34. ● Automotive industry
● Charging calculators
● Household appliances
● Power Farms for producing electricity on large
scale
● Business-related industries
Applications
34
35. References.
[1] Saga, T. Advances in crystalline silicon solar cell
technology for industrial mass production. NPG Asia Mater
2, 96–102 (2010).
https://doi.org/10.1038/asiamat.2010.82
[2] Sopian, K., et al. “An Overview of Crystalline Silicon
Solar Cell Technology: Past, Present, and Future.” AIP
Conference Proceedings, vol. 1877, no. 1, Sept. 2017, p.
https://doi.org/10.1063/1.4999854
[3] Battaglia, Corsin, et al. “High-Efficiency Crystalline
Silicon Solar Cells: Status and Perspectives.” Energy &
Environmental Science, vol. 9, no. 5, May 2016, pp. 1552–
76 https://doi.org/10.1039/C5EE03380B
35
The Czochralski process (Cz) is also known as “crystal pulling” or “pulling from the melt”. In this process, Silicon (Si) is first melted and then allowed to freeze into a crystalline state in a controlled manner. The advantage of this method is that it is fast and highly controllable. The industrial cultivation of high-purity monocrystalline Silicon crystals using the Cz Process has become well established primarily for the solar and semiconductor industries (in the computer industry for integrated circuits and in microsystem technology). You benefit from the high effectiveness and quality of the cultivated crystals.
To begin with, high-purity polycrystalline silicon is placed in the Silica crucible of a single crystal pulling system and then melted in a controlled atmosphere (Argon) using a resistance heater. Once the temperature of the melt has stabilized (the melting point is around 1,412 °C), a rotating monocrystalline Silicon seed crystal is dipped into the melt. A slight temperature drop initiates the crystallization of Silicon on the seed crystal. When the seed crystal is slowly pulled upward, a cylindrical Silicon monocrystal hanging on the seed crystal starts to form. The pulling rate and temperature are regulated such that a Silicon monocrystal—whose orientation and structure is identical to those of the seed crystal—can be pulled with a constant diameter.
The Siemens process involves deposition of silicon from a mixture of purified silane or trichlorosilane (TCS) gas with an excess of hydrogen onto high-purity polysilicon filaments. The silicon growth then occurs inside an insulated reaction chamber or ’bell jar’, which contains the gases. The filaments are assembled as electric circuits in series and are heated to the vapor deposition temperature by an external direct current. The silicon filaments are heated to very high temperatures of 1100–1175 ºC at which TCS with the help of the hydrogen decomposes to elemental silicon and deposits as a thin-layer film onto the filaments. Hydrogen chloride (HCl) is formed as a by-product.
The most critical process parameter is temperature control. The temperature of the gas and filaments must be high enough for the silicon from the gas to deposit onto the solid surface of the filament, but well below the melting point of 1414 ºC, so that the filaments do not start to melt. Second, the deposition rate must be well controlled and not too fast because otherwise the silicon will not deposit in a uniform, polycrystalline manner, making the material unsuitable for semiconductor and solar applications.
However, converting sand into high grade silicon comes at a high cost and is an energy intensive process. High-purity silicon is produced from quartz sand in an arc furnace at very high temperatures.
Ingots: The silicon is collected, usually in the form of solid rocks. Hundreds of these rocks are being melted together at very high temperatures in order to form ingots in the shape of a cylinder. To reach the desired shape, a steel, cylindrical furnace is used.
In the process of melting, attention is given so that all atoms are perfectly aligned in the desired structure and orientation. Boron is added to the process, which will give the silicone positive electrical polarity.
Mono crystalline cells are manufactured from a single crystal of silicon. Mono Silicon has higher efficiency in converting solar energy into electricity, therefore the price of monocrystalline panels is higher.
Polysilicone cells are made from melting several silicon crystals together. You can recognise them by the shattered glass look given by the different silicon crystals. After the ingot has cooled down, grinding and polishing are being performed, leaving the ingot with flat sides
Wafers: Wafers represent the next step in the manufacturing process.
The silicon ingot is sliced into thin disks, also called wafers. A wire saw is used for precision cutting. The thinness of the wafer is similar to that of a piece of paper.
Because pure silicon is shiny, it can reflect the sunlight. To reduce the amount of sunlight lost, an anti-reflective coating is put on the silicon wafer.
Solar Cell: The following processes will convert a wafer into a solar cell capable of converting solar power into electricity.
Each of the wafers is being treated and metal conductors are added on each surface. The conductors give the wafer a grid-like matrix on the surface. This will ensure the conversion of solar energy into electricity. The coating will facilitate the absorption of sunlight, rather than reflecting it.
System+ Battery+ Inverter: The solar cells are soldered together, using metal connectors to link the cells. Solar panels are made of solar cells integrated together in a matrix-like structure.
The current standard offering in the market are:
48 cell panels - suitable for small residential roofs.
60-cell panels - this is the standard size.
72-cell panels -used for large-scale installations.
With the invention of modern photovoltaics, and in a quest to increase efficiencies and reduce costs, engineers in the 1970s demonstrated that concentrating sunlight and focusing the equivalent of hundreds of “suns” onto solar cells increases their efficiency (Backus, 2003). For example, 20.7% efficient mono-c-Si cells, under AM1.5 spectral conditions, reach 26.5% efficiencies under 500 suns because the efficiency of a solar cell increases as the voltage- and fill factor of the cell rise. However, further increases in solar concentration require augmented cell package designs to collect the increased electrical current and dissipate additional waste heat. Otherwise there will be a decline in efficiency as shown in Fig. 1 for a cell package optimized for 500 suns.
Unlike the flat-plate photovoltaic systems seen on roofs, solar concentrators must track the sun to focus light on to a solar cell throughout the day. Sun tracking increases the daily energy production above that of non-tracking flat-plate PV panels. However, electrical output drops dramatically if the sun is not focused on the cell, or if clouds block the sun.
kerf is silicon dust that is wasted when silicon ingots are cut into thin wafers