Multi-component solar cells refer to solar cells that are not made of a single element semiconductor material. There are many varieties of research in various countries, solar panel and most of them have not been industrialized, solar panel mainly including the following: a) cadmium sulfide solar cells b) gallium arsenide solar cells c) copper indium selenium solar cells (new multi-element band gap gradient Cu(In, Ga) Se2 thin film solar cell)
Cu(In, Ga)Se2 is a kind of solar absorbing material with excellent performance. It has a gradient energy band gap (the energy level difference between the conduction band and the valence band). It can expand the solar energy absorption spectrum range and improve the photoelectric conversion. effectiveness. Based on it, solar panel thin-film solar cells with significantly improved photoelectric conversion efficiency than silicon thin-film solar cells can be designed. The achievable photoelectric conversion rate is 18%. Moreover, solar panel this type of thin-film solar cell has no performance degradation effect (SWE) caused by light radiation. Its photoelectric conversion efficiency is about 50~75% higher than that of commercial thin-film solar panels. Solar cells have the highest level of photoelectric conversion efficiency in the world.