倒置GaInP/GaAs/InGaAs三结太阳电池失效分析  

Analysis of Inverted GaInP/GaAs/InGaAs Triple-Junction Solar Cell Failure

作　　者：张怡[1] 龙军华 孙强健 宣静静 李雪飞[2] 王霞 陈志韬 吴晓旭 陆书龙[2] Zhang Yi;Long Junhua;Sun Qiangjian;Xuan Jingjing;Li Xuefei;Wang Xia;Chen Zhitao;Wu Xiaoxu;Lu Shulong(School of NanoTech and NanoBionics,University of Science and Technology of China,Hefei 230026,Anhui,China;Suzhou Institute of NanoTech and NanoBionics,Chinese Academy of Sciences,Suzhou 215123,Jiangsu,China)

机构地区：[1]中国科学技术大学纳米技术与纳米仿生学院,安徽合肥230026 [2]中国科学院苏州纳米技术与纳米仿生研究所,江苏苏州215123

出　　处：《光学学报》2022年第20期119-124,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61774165,61704186,61827823);SINANO计划(Y8AAQ11003,Y4JAQ21005)。

摘　　要：利用衬底剥离和临时键合技术制备了倒置GaInP/GaAs/InGaAs三结太阳电池并研究了其可靠性。通过温度为85℃、相对湿度为85%环境下的可靠性测试发现,当湿热实验进行至144 h时三结电池的初始光电转换效率从31.86%急剧下降到了24.84%。随着实验时间的继续增加,太阳电池性能相对稳定。外量子效率和电致发光光谱测试结果表明,三结电池性能的退化主要来自GaInP顶电池。在高温、高湿环境下,AlInP窗口层中元素含量分布发生变化,导致材料对340~480 nm波段的反射率提高,此外高含量Al元素的聚集导致顶电池缺陷密度增加,引起GaInP顶电池载流子收集效率下降,从而限制了三结太阳电池的整体性能。二次离子质谱的结果也直观地证明了这种现象。该研究结果证明了AlInP窗口层对多结太阳电池环境稳定性有重要影响。Inverted GaInP/GaAs/InGaAs triple-junction solar cells are fabricated by substrate lift-off and temporary bonding techniques,and their reliability is investigated.The reliability test in an environment with a temperature of 85℃and a relative humidity of 85%finds that the initial photoelectric conversion efficiency of the triple-junction cells drops sharply from 31.86%to 24.84%when the damp heat test is performed for 144 h.As the test time increases,the solar cell performance is relatively stable.External quantum efficiency and electroluminescence spectroscopy tests show that the degradation of the triple-junction cell performance mainly comes from the GaInP top cell.Under the high temperature and high humidity environment,the distribution of the element concent in the AlInP window layer changes,which results in the enhanced spectral reflectance of the material in the range from 340 nm to 480 nm.In addition,the aggregation of the high-concent Al element leads to an increase in the defect density of the top cell and a decrease in the carrier’s collection efficiency of the GaInP top cell,which thus limits the overall performance of triple-junction solar cells.The results of secondary ion mass spectrometry(SIMS)also visually demonstrate this phenomenon.The results of this study prove that the AlInP window layer has an important impact on the environmental stability of multi-junction solar cells.

关 键 词：材料 光伏 GAAS太阳电池 可靠性 湿热实验 AlInP窗口层 

分 类 号：O436[机械工程—光学工程]