非晶硅太阳电池减反射膜的设计

基于非晶硅太阳电池的工作原理，对其减反射膜进行研究．根据四分之一波长作用原理得到反射率最小时的厚度优化参数．单层减反射膜选用ITO（m=2．0，d=75nm），加权平均反射率为5．91％．双层膜选用MgF2／ITO，厚度分别为111nm和75nm，加权平均反射率为3．72％．此外，还作出反射率随波长的变化曲线，并通过计算仿真结果进行比较说明如何选材：对于单层减反射膜，采用折射率小的材料能取得更好的效果，而对于双层减反射膜，采用折射率上低下高形式，能取得更好的效果．

Design of Anti-Reflection Coating for A-Si Solar Cell

The anti-reflection coating is researched theoretically based on the principle of the amorphous sili- con solar cell. Following the quarter-wavelength action principle, the optimized thickness parameters can be ob- tained by computing the minimal reflectivity of the anti-reflection coatings. The single-layer anti-reflection coating adopts ITO（ n = 2.0, d = 75 nm） with the weighted average reflectance of 5.91% ; the double-layer anti-re- flection coating uses MgF2/ITO with the thickness of 111 nm and 75 nm, and the weighted average reflectance of 3.72%. In addition, the variation curve of reflectivity with the wavelength is put forward to explain how to select materials according to the results calculated by the computer program： as for single-layer anti-reflection coatings, the materials with a small refractive index can achieve good results, and for the double-layer anti-re- flection coatings, the materials with the low（up）/high（down） form of refractive index can get better effect.