Outdoor 60 watt solar street light knowledge: structure and characteristics of CGs solar cells

CS has the strongest light absorption capability in semiconductors. Since CS (Cuinse) is a direct transition type semiconductor, its light absorption coefficient is much larger than other semiconductors. Therefore, a film with a thickness of 1 to 2 um can absorb the sun well. Light. The CIGS obtained by replacing some of the In atoms with Ga has a band gap close to 13x, and the conversion efficiency is high. It is reported that the small-area battery has a conversion efficiency of up to 20%. Even for large-area components, the conversion efficiency is 16.7%, which is not inferior to the conversion efficiency of polycrystalline silicon solar cells.

The same power generation 1kW, silicon needs 5kg, and CS only needs 60g copper and indium

Silicon cells require about 200 um thick crystalline silicon, so about 5 kg of silicon is required to achieve an output power of kW. The CIGS film only needs 2um thick, and the total weight of the raw materials required for power generation kW is only 60g, which saves a lot of material. Compared with sea film silicon, its effect is higher, there is no light attenuation, and the production cost is lower. Therefore, CIGS is recognized as a solar material superior to polysilicon.