晶体硅太阳电池ZnS/MgF_(2)减反射膜的设计与分析

Design and Analysis of ZnS/MgF_(2) Antireflective Film for Crystal Silicon Solar Cells

选取ZnS和MgF_(2)两种材料设计了ZnS/MgF_(2)双层减反射膜,并利用TFCalc软件分析了膜层厚度、折射率以及光入射角对双层膜系有效反射率的影响.结果表明:ZnS和MgF_(2)的最佳物理厚度分别为67.86 nm和119.14 nm,此时达到最小有效反射率3.37%;在380~1200 nm波长范围内,ZnS的厚度对有效反射率的影响比MgF_(2)大;MgF_(2)的折射率对有效反射率的影响比ZnS大;适当降低MgF_(2)折射率可以获得较低的有效反射率.

In order to improve the photoelectric conversion efficiency of crystalline silicon solar cells,the ZnS/MgF_(2) double-layer anti-reflection film was designed by choosing ZnS and MgF_(2) materials.The effects of the thickness,refractive index and light incidence angle of each layer on the effective reflectivity of the double-layer film system were analyzed by TFCalc.The simulation results show that the optimal physical thickness of ZnS and MgF_(2) is 67.86 nm and 119.14 nm,respectively,and the minimum effective reflectance is 3.37%.The effect of the thickness of ZnS on the effective reflectivity is greater than that of MgF_(2) in the wavelength range from 380 nm to 1200 nm.The effect of MgF_(2) refractive index on effective reflectivity is greater than that of ZnS.Lower effective reflectivity can be obtained by appropriately decreasing the refractive index of MgF_(2).