提出了一种新型的表面和底部都带有阳极氧化铝(AAO)纳米光栅的GaAs太阳能电池结构,理论分析了表面和底部陷光作用的原理.利用FDTD Solution软件研究了短路电流密度(Jsc)和AAO几何参数的关系.结果表明,表面AAO和TiO2双减反层能很好的减少反射.背部AAO和Ag背反射可以有效的增大光程,从而减少电池厚度.带有组合陷光结构的电池可以在0°～45°范围内保持较稳定的Jsc数值.与只有减反层的结构相比,在相同Jsc条件下,组合陷光结构可以减少一半GaAs厚度.
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