Enhanced stability of FA-based perovskite:Rare-earth metal compound EuBr_(2) doping  

作　　者：候敏娜 郭旭 韩梅斗雪 赵均陶 王志元 丁毅 侯国付 张宗胜 韩小平 Minna Hou;Xu Guo;Meidouxue Han;Juntao Zhao;Zhiyuan Wang;Yi Ding;Guofu Hou;Zongsheng Zhang;Xiaoping Han(School of Energy and Power Engineering,North University of China,Taiyuan 030051,China;Institute of Photoelectronic Thin Film Devices and Technology,Nankai University,Tianjin 300072,China)

机构地区：[1]School of Energy and Power Engineering,North University of China,Taiyuan 030051,China [2]Institute of Photoelectronic Thin Film Devices and Technology,Nankai University,Tianjin 300072,China

出　　处：《Chinese Physics B》2024年第4期669-675,共7页中国物理B（英文版）

基　　金：Project supported by the Fundamental Research Program of Shanxi Province,China (Grant No.20210302124228);the National Key Research and Development Program of China (Grant No.2022YFB4200203);the Key Project of Natural Science Foundation of Tianjin (Grant No.22JCZDJC00120);the 111 Project (Grant No.B16027)。

摘　　要：It is highly desirable to enhance the long-term stability of perovskite solar cells(PSCs)so that this class of photovoltaic cells can be effectively used for the commercialization purposes.In this contribution,attempts have been made to use the two-step sequential method to dope EuBr_(2)into FAMAPbI_(3)perovskite to promote the stability.It is shown that the device durability at 85℃in air with RH of 20%-40%is improved substantially,and simultaneously the champion device efficiency of 23.04%is achieved.The enhancement in stability is attributed to two points:(ⅰ)EuBr_(2)doping effectively inhibits the decomposition andα-δphase transition of perovskite under ambient environment,and(ⅱ)EuBr_(2)aggregates in the oxidized format of Eu(BrO_(3))_(3)at perovskite grain boundaries and surface,hampering humidity erosion and mitigates degradation through coordination with H_(2)O.

关 键 词：EuBr_(2) doping inhibited phase transition and decomposition STABILITY perovskite solar cell 

分 类 号：TB34[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]