Amorphous silicon solar cells (a-Si solar cell) are devices that convert light energy into electrical energy through photoelectric or photochemical effects. Amorphous silicon cells are solar cells made of amorphous silicon thin films deposited on conductive glass substrates. This kind of solar cell features with low cost and good performance at weak light condition, it has been widely used in micro-low-power power supplies for indoor use, such as watch batteries, calculator batteries and self-powered wireless sensor etc . Welcome to watch this video to know more about a-Si solar cell.
Created by Carrie Wong | WSL Solar
WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006.
Many thanks to our employees for their hard work. Pay attention to every detail in the production process, such as wire welding, silicone molding, EL testing, measuring dimensions, etc. It is because of their carefulness and hard work that we can produce high quality solar panels.
WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006.
Photovoltaic glass is a special type of glass that converts sunlight into electricity by encapsulating solar cell modules in layers of glass. Usually low-iron tempered glass or double-layer glass is used, and the surface is coated with anti-reflection coating and transparent conductive layer.
Float glass is a common glass manufacturing process. In the production process, glass raw materials (such as silica sand, sodium carbonate, limestone, etc.) are melted, flowed out evenly from the top of the glass melting bath, and solidified into thin flake glass after cooling. This technique produces high-quality, uniform-thickness glass for a wide variety of applications.
The difference between photovoltaic glass and float glass is mainly reflected in the following aspects:
Different uses: Photovoltaic glass is mainly used in the manufacture of solar panels, while float glass is widely used in construction, automobiles and other fields;
Different materials: Photovoltaic glass usually uses special materials such as low-iron tempered glass or double-layer glass, while float glass is produced by using ordinary glass raw materials through special processes;
The manufacturing method is different: photovoltaic glass needs to be coated with anti-reflection coating and transparent conductive layer on the surface, and the solar cell module is encapsulated in it. Float glass, on the other hand, is made from thin sheets of glass by melting the raw material.
Different performance requirements: Photovoltaic glass needs to have certain special properties such as transmittance, reflectivity and wind pressure resistance, while float glass mainly requires uniform thickness, high strength and light transmission performance.
WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006. https://www.wsl-solar.com
Considering factors such as conversion efficiency of solar panels, technical level, maturity of production process, market share, etc., for large-scale grid-connected photovoltaic power plants, the types of solar panels currently commonly used can be roughly divided into crystalline silicon solar panels and amorphous silicon solar panels. Crystalline silicon solar panels are further divided into monocrystalline silicon solar panels and polycrystalline silicon solar panels. Amorphous silicon solar panels are mainly thin-film solar panels. The following is a brief analysis of the conversion efficiency of various photovoltaic solar panels:
1. Monocrystalline silicon solar panels Monocrystalline solar panels are the most common high-efficiency solar panels on the market today. The production process and technological breakthroughs of the single crystal industry chain determine that it has a more perfect crystal lattice, can better absorb light, and has a higher conversion efficiency. For monocrystalline solar panels, the efficiency of PERC high-efficiency monocrystalline solar cells has exceeded 23%, setting a world record. The conversion efficiency of ordinary monocrystalline solar cells is also above 19%, which is the highest photoelectric conversion efficiency among all types of solar cells. With the continuous maturity of technology, the price of monocrystalline solar panels is almost the same as that of polycrystalline. Because monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is durable and its service life can generally reach 20 years, and the maximum can reach 30 years.
2. Polycrystalline silicon solar panels Compared with monocrystalline solar cells, the silicon wafer of polycrystalline solar cells is a combination of multiple tiny single crystals, with a large number of grain boundaries in the middle, including many defects. It is actually a minority carrier recombination center, thus reducing the polycrystalline silicon. At present, the conversion efficiency of polycrystalline solar cells is about 18%-20%.
3. Thin film solar panels After several years of rapid development, the laboratory efficiency of single-junction amorphous silicon thin-film solar cells can reach about 12.7%, and the laboratory efficiency of microcrystalline silicon multi-junction solar cells can reach 13.4%. The laboratory photoelectric conversion efficiency of solar cells can reach 16%, and the average efficiency of commercial solar cells is 8%-10%. The conversion efficiency of copper indium gallium selenide can reach 14%.
However, compared with crystalline silicon solar panels, the main problem of thin-film solar panels is the low photoelectric conversion efficiency, and the area of thin-film solar panels required to convert the same amount of electric energy is huge. In addition, thin-film solar panels also have the disadvantage of poor stability, and their energy conversion efficiency changes with the prolongation of irradiation time. These shortcomings are the biggest obstacles to the wide application of thin-film solar panels. From the analysis of the conversion efficiency of the above three types of photovoltaic solar panels, it is not difficult to see that the conversion efficiency of crystalline silicon solar panels is significantly higher and more stable than that of thin-film solar panels. Monocrystalline silicon solar panels have significantly higher conversion efficiency and are more stable than polycrystalline silicon solar panels. For the selection of photovoltaic power plant components, it should be combined with the specific conditions of the project, and the corresponding technical and economic comparison analysis should be carried out to finally determine the best solar panel selection suitable for the photovoltaic power plant.
WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006. https://www.wsl-solar.com
Key Features: – Utilize high efficiency mono PERC solar cell, up to 22.5% efficiency – Laminated by tempered glass, rigid, durable and long lasting – Waterproof, scratch resistant, and UV resistant – Customized solar panels for industrial use
Description: 5V 3W Solar Panel
This custom shaped 3w solar panel utilizes high efficiency mono PERC solar cells with efficiency up to 22.5%, to ensure its high output. It is laminated by tempered glass to protect the solar cells inside, making it rigid, durable and long lasting. This rigid solar panel is waterproof, scratch resistant, and UV resistant, specially designed for long term outdoor use in any challenging condition.
Applications: Tempered glass solar panels are widely used in IoT applications, marine buoys, wireless sensors, traffic warning devise, GPS devices, asset tracking, electric fence chargers, outdoor lighting systems, weather monitoring systems etc.
The construction of custom solar panels varies slightly depending on the lamination method and the materials used. The following is a brief introduction to the construction of tempered glass solar panels and ETFE solar panels.
1. Solar Panel Construction of Tempered Glass Solar Panels Tempered Glass / EVA / Solar Cell / EVA / Backsheet
2. Solar Panel Construction of ETFE Solar Panels ETFE film / EVA / Solar Cell / PCB
Tempered glass: The role of tempered glass is to protect the solar cells, the selected photovoltaic glass must have high light transmittance (generally more than 91%), and requires ultra-white tempering treatment. The thickness of photovoltaic glass is either 3.2mm or 2.0mm. The most commonly used is the 3.2mm thick glass.
EVA: EVA is an important encapsulant material, which is used to bond tempered glass and solar cells. It is usually cut into a thin sheet that can be inserted at the front and rear of the solar cells. The quality of transparent EVA material directly affects the lifespan of the solar panel. Should EVA be exposed to the air, it will easily age and turn yellow, thus affecting the light transmittance of the solar panel, and power generation quality. The thickness of EVA ranges from 3mm to 4.5mm; among them, 4mm and 4.5mm are used the most.
Solar Cell: Solar cells convert sunlight into electricity via the photovoltaic effect. They are the core parts of solar panels. Generally speaking, the power of a solar panel is proportional to the area of the solar cell.
Backsheet The function of the backsheet is to seal, insulate and waterproof. Therefore, the selected backsheet materials such as TPT and TPE must be resistant to aging. The backsheet is available in white and black. The white backsheet is commonly used, but some clients choose to use the black backsheet in order to maintain the color consistency with the application product and to be aesthetically pleasing.
ETFE Film: ETFE film is a film used to protect solar cells inside solar panels. Its thickness is usually less than 0.2mm, making it thin and light. In addition, it has the characteristics of resistance to temperature changes, high light transmittance of up to 95%, high self-cleaning, corrosion resistance, and long service life.
IBC Solar Cell ETFE solar panels adopt IBC solar cells (interdigitated back contact) with efficiency up to 24%, to achieve a higher power output in a limited area. Traditional solar cells achieve energy conversion by having front contacts in the cell, while IBC solar cells have the contacts on the rear side, instead of placing them in the front of the cell. This allows them to achieve higher efficiency due to reduced shading on the front of the cell, and also increases the aesthetics since no contacts are visible on the front. IBC solar cell technology also improves the temperature coefficient, which means an IBC solar panel can deliver a better performance in hot climate installations. It also has excellent performance under low light conditions.
WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006. https://www.wsl-solar.com
Quality is of paramount importance to us. To deliver outstanding quality solar panels while meeting highly customized demands for solar applications is the most import thing to us. From the selection of raw materials, through the process of manufacturing, to packaging and transportation; quality control is strictly implemented.
At WSL Solar facility, in-process inspection is an overall effort performed at each stage of solar panel manufacturing. We will conduct 100% visual inspection and performance tests of all custom solar panels before packaging and shipping.
This 5v 5w solar panel utilizes high efficiency mono PERC solar cells with efficiency up to 22.5%, to ensure its high output. It is laminated by tempered glass to protect the solar cells inside, making it rigid, durable and long lasting. This IoT solar panel is waterproof, scratch resistant, and UV resistant, specially designed for long term outdoor use in any challenging condition.
Key Features:
– Utilize high efficiency mono PERC solar cell, up to 22.5% efficiency – Laminated by tempered glass, rigid, durable and long lasting – Waterproof, scratch resistant, and UV resistant – Customized solar panels for industrial use
Applications: Tempered glass solar panels are widely used in IoT applications, marine buoys, wireless sensors, traffic warning devise, GPS devices, asset tracking, electric fence chargers, outdoor lighting systems, weather monitoring systems etc.
This summer has been very hot, with temperatures reaching 36 degrees Celsius. But when we ascended the mountain, the summit was very cool, the temperature was only 26 degrees. The wind on the top of the mountain is very strong, and there are many wind turbines installed on it. Great to see more and more clean energy.
WSL Solar has been a professional manufacturer of high quality custom solar panels and solar solution provider in China since 2006.
WSL Solar’s 4W 5V IoT solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for IoT applications. Solar panel size: 345x190x18mm
IoT Solar Panel, 3V 10W
3 Volt Solar Panel | 10W
WSL Solar’s 10W 3 volt solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for IoT applications. Solar panel size: 345x190x18mm
IoT Solar Panel, 5V 2.5W
5V Solar Panel | 2.5W
This 2.5W 5V solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom shaped solar panel is great for charging your 3.7-volt DC batteries and ideal for IoT applications. Solar panel size: 176x86x4.5mm
IoT Solar Panel, 8V 2W
2 Watt Solar Panel | 8V
WSL Solar’s 2 watt solar panel is built with high efficiency mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This black solar panel comes with a black back sheet, a matte black frame and black solar cells, providing an all-black aesthetic. This custom solar panel is ideal for use in IoT applications. Solar panel size: 124x124x18mm
IoT Solar Panel, 6V 3W
6 Volt Solar Panel | 3W
WSL Solar’s 6 Volt solar panel 3W is built with the latest mono PERC mono solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for use in IoT applications. Solar panel size: 120x160x4.5mm
IoT Solar Panel, 9V 2W
9V Solar Panel | 2W
WSL Solar’s 2W 9V solar panel is built with the latest mono PERC mono solar cell. It is laminated by tempered glass, which is durable and robust. This 2 watt solar panel is ideal for use in IoT applications. Solar panel size: 130x140x17mm
IoT Solar Panel, 5V 0.6W
5V Solar Panel, 0.6W | ETFE Solar Panel
This 0.6W 5V solar panel is built with the super high efficiency IBC solar cell (23.5% efficiency). It is laminated by ETFE film, which is light weight and thin. This ETFE solar panel is great for charging your 3.2-volt DC batteries and ideal for use in IoT applications. Solar panel size: 65x65x2mm
IoT Solar Panel, 6V 1.2W
6V Solar Panel, 1.2W | IBC Solar Panel
This 6v 1.2w IBC solar panel is built with the super high efficiency IBC solar cell (23.5% efficiency). It is laminated by PET film, which is light weight and thin. This 6V solar panel is great for charging your 3.7-volt DC batteries and ideal for use in IoT applications. Solar panel size: 85x85x1.8mm
WSL Solar has been a professional manufacturer of high quality custom solar panels and solar solution provider in China since 2006.
Custom Solar Panel 