首页|Enhanced stability of FA-based perovskite:Rare-earth metal compound EuBr2 doping
Enhanced stability of FA-based perovskite:Rare-earth metal compound EuBr2 doping
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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 EuBr2 into FAMAPbI3 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)EuBr2 doping effectively inhibits the decomposition and α-δ phase transition of perovskite under ambient environment,and(ii)EuBr2 aggregates in the oxidized format of Eu(BrO3)3 at perovskite grain boundaries and surface,hampering humidity erosion and mitigates degradation through coordination with H2O.
EuBr2 dopinginhibited phase transition and decompositionstabilityperovskite solar cell
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
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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
Fundamental Research Program of Shanxi Province国家重点研发计划天津市自然科学基金重点项目高等学校学科创新引智计划(111计划)
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