Amorphous silicon is a direct bandgap semiconductor, with a wide range of light radiation absorption and a thin required thickness. Therefore, amorphous silicon thin film solar cells can be made very thin. The total thickness of the light absorption film is about 1 micron, and amorphous silicon consumes fewer raw materials. , low cost and better performance are favored by the market.

    The low cost is reflected in the fact that the silicon material uses less material and can fully absorb light. The single crystal should be 200μ thick, and the amorphous silicon should be 1μ thick (amorphous silicon has a large light absorption coefficient).

    The second point is that the main raw material is silane used in the production of high-purity polysilicon. This gas can be supplied in large quantities by the chemical industry and is very cheap. The raw material for manufacturing one-watt amorphous silicon solar panels costs about RMB3.5-4 ( efficiency higher than 6%).

    The basic thickness of mono solar panels is 240-270um, a difference of more than 200 times. Large-scale production requires an extremely large number of semiconductor grades. The cost of silicon wafers alone accounts for 65-70% of the cost of the entire solar cell. In China, 1 watt of crystalline silicon The cost of silicon material for solar cells has risen to more than RMB22.

    Because the core process is suitable for the production of a-Si alloy films with very large areas without structural defects; the PN junction and the corresponding laminated structure can be realized only by changing the gas phase composition or gas flow; the product can be fully automated.

    Moreover, thin-film a-Si solar cells are easy to be integrated, and the device power, output voltage, and output current can be freely designed and manufactured, which can easily produce a variety of products suitable for different needs.