GaAs多结电池宽光谱ZnS/Al_2O_3/MgF_2减反射膜的设计与分析  

ZnS/Al_2O_3/MgF_2 antireflection coating with wide spectrum for GaAs multi-junction solar cells

作　　者：肖祥江[1] 涂洁磊[1] 白红艳[1] 

机构地区：[1]云南师范大学太阳能研究所,教育部可再生能源材料先进技术与制备重点实验室,云南省农村能源工程重点实验室,云南昆明650092

出　　处：《应用光学》2014年第4期670-674,共5页Journal of Applied Optics

基　　金：国家高技术研究发展计划项目(2011AA050512)

摘　　要：为了提高砷化镓(GaAs)多结太阳电池的光电转换效率,设计了宽光谱(300nm^1 800nm)ZnS/Al2O3/MgF2三层减反射膜,分析了各层的厚度及折射率对三层膜系有效反射率的影响。结果表明:对于整个波长,ZnS厚度对有效反射率的影响要大于Al2O3和MgF2,MgF2厚度对有效反射率的影响最小;适当减小MgF2的折射率或增加ZnS的折射率可得到更低的有效反射率。同时,当ZnS,Al2O3和MgF2的最优物理厚度分别为52.77nm,82.61nm,125.17nm时,此时最小有效反射率为2.31%。ZnS/Al2O3/MgF2three-layer antireflection coating with wide spectrum(300nm^1800nm)was designed in order to improve the photoelectric conversion efficiency of GaAs multi-junction solar cells.The influence of each layer's thickness and refractive index on the effective reflectance of film system was analyzed.The results show that the impact of the film thickness of ZnS is greater than that of Al2O3and MgF2on the effective reflectance in the whole wavelength,and the impact of MgF2is the lowest;decreasing the refractivity of MgF2or increasing the refractivity of ZnS proportionally can get lower effective reflectance.Furthermore,when the optimal physical thickness of ZnS,Al2O3and MgF2is 52.77nm,82.61nm and125.17nm respectively by programming calculation,the minimum effective reflectance is2.31%.

关 键 词：薄膜光学 GaAs多结太阳电池 ZnS/Al2O3/MgF2三层减反射膜 有效反射率 

分 类 号：O484.41[理学—固体物理]