分别设计与优化了非晶薄膜太阳能电池的上表层和电池底部结构, 采用严格耦合波方法(RCWA)数值计算了电池的光吸收。计算结果表明: 在仅考虑TM偏振的情况下, 优化后的增透膜与无增透膜相比, 300~840 nm波长范围内的吸收平均提高了35%左右; 优化后的背反射器与无背反射器相比, 700~840 nm波长范围内的吸收平均提高了23%左右。该非晶硅薄膜太阳能电池结构在全角宽频范围内有较高吸收, 可以提高太阳能电池的转化效率。

The front-surface and the bottom of amorphous silicon(a-Si) thin-film solar cell are designed respectively. Light absorption is calculated by using the rigorous coupled wave analysis(RCWA) . In TM polarization, the absorption of solar cells with optimized AR coating can be increased by an average of 35% compared with that without AR coating in the range of 300~840 nm. Furthermore, the absorption of solar cells with optimized back reflector can be increased by an average of 23% compared with that without back reflector in the range of 700~840 nm. The amorphous silicon(a-Si) thin-film solar cell that we design has broadband and omnidirectional absorption, so that it can improve the conversion efficiency of solar cells.