The main raw material used in amorphous silicon solar cells is amorphous silicon, which generally uses silicon as the basic element.
Here are the main raw materials and uses of amorphous silicon solar cells:
1. Amorphous silicon material (a-Si): Amorphous silicon material is a silicon material with an amorphous material. structure, which has a higher light absorption coefficient and can absorb sunlight with a thinner layer thickness. Amorphous silicon films can be prepared by techniques such as physical vapor deposition (PECVD). Amorphous silicon material is mainly used as a photoelectric conversion layer to convert light energy into electrical energy.
2. Transparent Conductive Oxide (TCO): Transparent conductive oxides such as indium tin oxide (ITO) are commonly usedas electrode materials for amorphous silicon solar cells. TCO materials can maintain current conductivity while maintaining high transparency, allowing light to enter solar cells.
3. Base material: The base material of amorphous silicon solar cells is usually a glass or plastic substrate. The glass substrate has good flatness and chemical stability and is suitable for high temperature deposition processes. Plastic substrates are lighter and more flexible, making them suitable for the preparation of flexible solar cells.
4. Metal electrodes: In addition to TCO materials, amorphous silicon solar cells also require metal electrodes as current collection and transmission layers. Commonly used metal electrode materials include aluminum (Al), silver (Ag), etc.
1. Diappearance difference
The four corners of the single crystal silicon cells are arc-shaped, and there is no pattern on the surface;
The four corners of the cells polycrystalline silicon cells are The corners are square and the surface has a pattern similar to that of ice flowers;
Amorphous silicon cells are what we usually call thin film components, unlike polycrystalline silicon cells. crystalline silicon where the gate lines can be. seen, the surface is as clear as a mirror.
2. The above usage differences
For users, there is not much difference between monocrystalline silicon batteries and polycrystalline silicon. batteries. Their lifespan and stability are very good.
Although the average conversion efficiency of monocrystalline silicon cells is about 1% higher than that of polycrystalline silicon cells, since thes monocrystalline silicon cells can only have a quasi-square shape (all four sides are arc-shaped). ), they cannot be used when forming solar panels. If there is a problem, part of the area will not be filled with polysilicon, so there is no such problem. Their advantages and disadvantages are as follows:
< p>Crystalline silicon modules: The power of a single module is relatively high. Under the same floor space, the installed capacity is higher than that of thin-film modules. However, the components are heavy and fragile, have poor high temperature performance, poor low light performance, and high annual attenuation rate.Thin film module: The power of a single module is relatively low. However, it has high power generation performance, good high temperature performance, good performancelow-light ances, low shadow-blocking power loss, and low annual attenuation rate. It has a wide application environment, beautiful appearance and environmental protection.
3. Differences in manufacturing processes
The energy consumed in the manufacturing process of polycrystalline silicon solar cells is approximately 30% lower than that of monocrystalline silicon solar cells;
3 . p>Therefore, polycrystalline silicon solar cells Batteries account for the total global production of solar cellsThe volume share is large and the manufacturing cost is lower than that of monocrystalline silicon cells, so the use of solar cells made of polycrystalline silicon will be more energy efficient and environmentally friendly;
There are many methods for amorphous silicon. solar cells, including chemistry enhanced byplasma vapor deposition, reactive sputtering method, glow discharge method, electron beam evaporation method and silane thermal decomposition method, etc.
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Encyclopedia Baidu - Amorphous silicon solar cells