Solar cells can be divided into two categories according to the crystallization state: crystalline thin film type and amorphous thin film type (hereinafter referred to as a-), and the former is divided into single crystal form and polycrystalline form.
According to the material, it can be divided into silicon thin film type, compound semiconductor thin film type and organic film type. The compound semiconductor thin film type is further divided into amorphous type (a-Si:H). , a-Si:H:F , a-SixGel-x:H, etc.), Group IIIV (GaAs, InP, etc.), Group IIVI (Cds series) and zinc phosphide (Zn 3 p 2), etc. .
According to the different materials used, solar cells can also be divided into: silicon solar cells, multi-compound thin-film solar cells, polymer multi-layer modified electrode solar cells, nanocrystalline solar cells, solar cells organic solar. , including celSilicon solar cells currently constitute the most mature and dominant applications.
What is thin film solar power generation
1 square meter of solar panel can generate 1.4 to 1.5 kWh of electricity in ten hours.
The power of a 1.1 square meter solar panel is about 140-150W. It is a relatively fixed quantity, but daily lighting conditions are variable, such as rain, cloudy days, morning, evening..., all affect electricity production. In theory, 1 square meter of solar panels can generate 1.4 to 1.5 kilowatt hours of electricity in ten hours.
2. There are several types of solar energy production. One is crystalline silicon, including monocrystalline silicon and polycrystalline silicon, the other is amorphous silicon power generation, which is not crystalline silicon. power, flexible solar energy production. DueDue to the low conversion rate of amorphous solar cells, crystalline silicon solar power generation is now more widely used.
A 3.1 square meter crystalline silicon solar panel is equivalent to approximately 120-140 W. If calculated at 120 W, the sun at 6 hours a day is 120*6 = 720 WH. A 10W lamp depends on how many hours you use it per day and how many consecutive rainy days you use it. If you use it 9 hours a day and 3 rainy days, then the battery panel is 30-50W.
4. One square meter of monocrystalline silicon solar panel is equivalent to approximately 120 watts. It generates electricity for approximately 8 hours a day. It can generate approximately 0.96 kilowatt hours of electricity every day. is greatly affected by sunlight, the stronger the sunshine and the longer the sunshine duration, the greater the energy output.
Whatare the advantages of flexible solar panels over ordinary crystalline silicon?
Thin film solar power generation is a thin film solar cell technology.
Thin-film solar cells can be manufactured using glass, plastic, ceramic, graphite, metal foil and other low-cost materials as substrates. The thickness of the thin layer that can generate voltage is only a few. μm, so that it can receive light at the same time. Compared with silicon wafer solar cells, the amount of raw materials used can be greatly reduced (the thickness can be more than 90% lower than that of silicon wafer solar cells at present). , the highest conversion efficiency in the laboratory has reached more than 20%, and the maximum stable efficiency in large-scale mass production is about13%. thin-film solar In addition to being flat, swimming pools can also be transformed into non-planar structures due to their flexibility. They have a wide range of applications. They can be combined with buildings or be part of buildings. , different types of swimming pools can be used. Various deposition technologies grow p-type or n-type materials layer by layer. Common thin-film solar cells include amorphous silicon, CuInSe2 (CIS), CuInGaSe2 (CIGS), and CdTe.
Module structure
Thin-film solar modules are composed of glass substrates, metal layers, transparent conductive layers, electrical function boxes, adhesive materials, semiconductor layers, etc.
Product application
Translucent solar cell module: building integrated solar (BIPV) application
Application of solar energy tothin film: portable foldable charging power supply, military, travel
Applications of thin film solar modules: roofing, building integration, remote power supply, national defense
Comparison of thickness
Crystalline silicon (180~250μm), single junction amorphous silicon film (600nm), laminated amorphous silicon film (400nm ~ 500nm).
Features
1. Low power loss under the same shielding area (good power generation in low light conditions)
2. Power loss under the same lighting Less. energy than wafer solar cells
3. Best power temperature coefficient
4. Better light transmission
5. Higher cumulative energy production quantity
6. Only a small amount of silicon raw material is required
7. There is no internal short circuit problem (the connection was integratede during the production of the battery in series)
8. Thinner than sliced solar cells
9. Material procurement is worry-free
10. Can be integrated into building materials (BIPV)
1. Structural advantages:
Conventional solar cells are usually made of two layers of glass with EVA materials and batteries. between the two. Due to the structure of the chip, these components 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 coversETFE film ones can even be folded as desired, 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 product.
3. Advantages of assembly:
Dye-sensitized solar cells and organic perovskite solar cells combined with nanotechnology have obvious advantages in assembling materials and devices et are currently the most flexible in the world. . Solar battery.
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.