CIGSSe thin film solar cells produced by "sputtering metal prefabricated layer and then selenizing and sulfurizing" are the second generation photovoltaic products with the most advanced technology and the most mature industrial production in the world. CIGSSe thin film is a direct band gap compound semiconductor material composed of copper, indium, selenium and other metal elements. Its absorption coefficient for visible light is the highest among all thin film battery materials, but the consumption of raw materials is much lower than that of traditional crystalline silicon solar cells. Compared with crystalline silicon solar cells with high efficiency and high cost and amorphous silicon solar cells with low efficiency and low cost, CIGSSe solar cells have multiple advantages of high efficiency, low cost and long life, and are the most promising high-efficiency thin film solar cells to reduce the cost of photovoltaic power generation, and have broad development prospects.
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