The multi-compound solar cell refers to a solar cell that is not made of a single element semiconductor material. Now the variety of research in countries, most not industrialized production, mainly the following: A, cadmium sulfide solar cell B, gallium arsenide solar cell c) Copper indium Selenium solar cell (new multi-element bandgap gradient Cu (in, GA) Se2 thin film solar cell)
Cu (In, GA) Se2 is a kind of high performance sunlight absorbing materials, with gradient band gap (between the band and the valence band between the difference between the energy), the semiconductor materials, can enlarge the range of solar absorption spectrum, and thus improve photoelectric conversion efficiency. Based on it, the photoelectric conversion efficiency can be designed to improve the thin film solar cells obviously than silicon thin film solar cells. The photoelectric conversion rate can be reached 18%, moreover, such thin-film solar cells so far have not been found to have the effect of radiation-induced degradation of performance (SWE), its photoelectric conversion efficiency than the current commercial thin film solar panels to improve about 50 75, in thin film solar cells belonging to the world's highest level of photoelectric conversion efficiency.