摘要
在考虑折射率色散效应的情况下,通过光学干涉矩阵法数值计算了2种MgF_2/ZnS双层减反射膜晶体硅太阳电池的反射率,并与未考虑折射率色散效应的结果及实验数据进行对比;在考虑折射率色散情形下,利用智能优化算法设计了硅太阳电池的双层减反射膜,并与未考虑折射率色散效应的设计结果进行比较.结果表明,考虑色散情形下的反射率与实验测量结果更相符,尤其是在短波范围内.SiO_2/ZnSe双层减反射膜的最小加权平均反射率减少了34.82%;MgF_2/ZnS、SiO_2/ZnS、MgF_2/Al_2O_3双层减反射膜的最小加权平均反射率分别减少了9.15%,7.73%,3.44%.可见,在考虑折射率色散效应的情况下,优化后的双层减反射膜的最小加权平均反射率均出现较大程度的减小.因此,在晶体硅太阳电池减反射膜的设计中,考虑晶体硅和减反射膜材料的折射率色散效应是十分必要的.
The reflectance of two double-layer MgF_2/ZnS anti-reflection coatings for space silicon solar cells was calculated by optical interference matrix method considering the refractive-index dispersion effect.The calculated results were compared with those of no dispersion effect and experimental data.Then,the parameters of the double-layer anti-reflection coatings for the cells were designed by intelligent optimization algorithm and compared with the results of without considering the refractive-index dispersion effect.The results show that the reflectivity in the case of dispersion is considered to be more consistent with the experimental results,especially in the short wave range.Compared with no dispersion effect,the minimum weighted average reflectivity of the SiO_2/ZnSe double-layer anti-reflective coatings after optimizing is reduced by 34.82%,and the minimum weighted average reflectivity of MgF_2/ZnS,SiO_2/ZnS and MgF_2/Al_2O_3 double-layer anti-reflective coatings is reduced by 9.15%,7.73%,3.44%,respectively,considering the dispersion effect.It can be seen that the minimum weighted average reflectivity of the optimized double-layer anti-reflective coatings is reduced greatly in consideration of the refractive index dispersion effect.Therefore,it is necessary to take into account the refractive-index dispersion effect in the design of the anti-reflective coatings of the crystalline silicon solar cells.
引文
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