Flexible solar cells are now mainly divided into three categories: one is thin-film solar cells made of inorganic semiconductor materials; the other is thin-film organic solar cells made of organic or polymer semiconductor materials; solar cells prepared from nanoscale titanium dioxide.
The first type has been applied commercially, with an efficiency of about 10%. But the cost remains relatively high.
To increase the open circuit voltage, the main thing is to increase the difference between the HOMO of the N-type material and the LOMO of the P-type material. There are also reports that the Increasing the work function difference between the two electrode metals will also help increase the open circuit voltage of the battery.
The increase in short-circuit current mainly dependsThis is due to the improvement of the quantum efficiency of the battery, that is to say the efficiency of conversion of absorbed photons into electrons and holes. Quantum efficiency can be improved by increasing the absorption of light by the battery and increasing the interface contact inside the battery. The most important thing is to find more suitable materials. In addition, the generated electrons and holes can recombine during the transmission process, resulting in a lower short-circuit current. Generally, it can be eliminated through structural design to reduce compounding risks.
The fill factor is partly related to the internal resistance of the battery, and partly to the characteristics of the battery material. Reducing the thickness of the battery can increase the fill factor.
For more information, please refer to the book “Optoelectronic Functional Ultrathin Films” edited by academician Huang Chunhui (Peking University Press) and other professional publications.
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Hangzhou LibraryWhat are the advantages of flexible solar panels compared with ordinary crystalline silicon?
The main categories of New solar cells currently include: organic solar cells, perovskite solar cells, copper indium gallium selenide solar cells, quantum dot solar cells, polycrystalline silicon thin film solar cells.
1. Organic solar cells: This type of battery is made from organic materials and is typically lightweight, flexible, and customizable. The research and development of organic solar cells has made significant progress in recent years, making this typecell a promising alternative energy source.
2. Perovskite solar cells: Perovskite solar cells are a new type of high-efficiency solar cells that use perovskite materials as the light-absorbing layer. Perovskite solar cells have high conversion efficiencies and can be manufactured in large sizes, making them ideal for large-scale applications.
3. Copper Indium Gallium Selenide Solar Cells: This type of solar cells uses elements such as copper, indium, gallium and selenium as the main components. CIGS solar cells have high efficiency and stability and can operate in different environments.
4. Quantum dot solar cells: Quantum dot solar cells use quantum dot materials to absorb sunlight and generate current. This type of batteryoffers high efficiency and stability while being relatively inexpensive to manufacture, making it an attractive and promising alternative energy source.
5. Polycrystalline silicon thin film solar cells: This type of solar cell is made of a thin layer of polycrystalline silicon and generally has the advantages of being lightweight and foldable. Polycrystalline silicon thin-film solar cells are relatively inexpensive to manufacture and can operate in a variety of environments.
Flexible thin film solar cells have advantages over conventional solar cells:
1.Structural advantages:
< p>Conventional solar cells usually have a structure made of EVA material, and cells between two layers of glass are heavier and require supports during installation, making them difficult to move.Flexible thin-film solar cells do not require glass backsheets or covers and are 80% lighter than double-glass solar cell modules. Flexible cells using PVC backsheets and ETFE film covers can even be folded at will, making them easy to transport.2. Advantages:
Can be used in solar backpacks, solar convertibles, solar flashlights, solar cars, solar sailboats and even solar airplanes. The scope of use is relatively wide. The disadvantage is that the photoelectric conversion efficiency is lower than that of conventional crystalline silicon components. There is also a semi-flexible solar panel with a high conversion rate that can only be bent about 30 degrees. Guangrui Industrial Co., Ltd. is relatively mature in the production of solar panels for this type of productt.
3. Advantages of assembly:
Dye-sensitized solar cells and organic perovskite solar cells combined with nanotechnology have obvious advantages in the assembly of materials and devices and are currently more common in the world. flexible solar cells.
To obtain high-performance dye-sensitized flexible solar cells and promote their industrialization, advancements should be sought in the following aspects. On the one hand, there is a need to further improve the photoelectric conversion efficiency and stability of dye-sensitized flexible solar cells. Another aspect is to further reduce the cost of batteries and enable the preparation of large-scale roll-to-roll printing.