Electrical knowledge: description thin-film solar cells
At present, solar cells crystalline silicon have been widely used solar cells occupy the main market. However, crystal now widely used in solar cells crystalline silicon solar cells occupy the main market. However, solar cells weaknesses inherent crystalline silicon: silicon materials, the gap Eg = 1.12eV,Studio 1435 battery , land conversion efficiency of solar PV is relatively low silicon material is a material indirect band in the visible, the coefficient light absorption of silicon is far is far below that of other photovoltaic materials, such as the same 95% of the absorption of sunlight, the GaAs solar cells need only 5 to 10 microns thick, while that silicon solar cells requires more than 150 microns thick, even when in the preparation of silicon solar cells crystalline silicon thickness of 150 to 200 microns or more can effectively absorb solar energy, material crystalline silicon to go through several purification, the relatively high cost, silicon solar cell size is relatively small, so the composition of photovoltaic systems, use the number 10 the same silicon solar cells connected together, resulting in higher cost of the system.sony vgp-bpl11 , Therefore, the thin-film solar cells has aroused people’s interest and a degree of industrial applications.