Mixed-cation perovskite solar cells have attracted tremendous attention in space applications due to their excellent power conversion efficiency(PCE)and stability to light and heat.Although the evolution of photovoltaic performance in different space environments has been investigated,the role of inorganic cesium ions(Cs+)in the enhancement of irradiation resistance needs to be further clarified.Herein,the structure and performance evolution of Cs-doped CH3NH3PbI3(MAPbI3)films and planar heterojunction devices under proton irradiation up to 1 x 1016 p cm-2 were studied.5％of Cs+doping can increase the cohesive energy of MAPbI3 and effectively alleviate the lattice strain induced by proton irradiation,thereby enhancing the crystallinity and stability of films.The bandgap changes of irradiated Cso.05MAo.95PbI3 films under the identical fluence were only one third of that of MAPbI3 films.Upon irra-diation under the fluence of 1 x 1014 p cm2,the density of trap states in the undoped and 5％Cs-doped films increased by 71％and 9％,respectively,and the average PCE of 20 corresponding devices decreased only by 12％and 9％,respectively.This proves that the replacement of organic methylamine ion with inor-ganic cesium ion contributes to the improvement of MAPbI3 resistance to proton irradiation,thus con-firming the application prospects of mixed-cation or all-inorganic perovskite solar cells in spacecraft.

Pan Luo;Xue-Yin Sun;Hao Jiang;Li Yang;Yang Li;Wen-Zhu Shao;Liang Zhen;Cheng-Yan Xu

School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing,Harbin Institute of Technology,Harbin 150080,Heilongjiang,China;National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China;Sauvage Laboratory for Smart Materials,School of Materials Science and Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,Guangdong,China

能源化学

[1]Pan Luo;Xue-Yin Sun;Hao Jiang;Li Yang;Yang Li;Wen-Zhu Shao;Liang Zhen;Cheng-Yan Xu-.Enhanced proton irradiation resistance in Cs-doped CH3NH3PbI3 films and solar cells)[J].能源化学,2022(06):261-269

Cs+doping,Cso,05MAo,95PbI3

Enhanced,proton,irradiation,resistance,CH3NH3PbI3,films,solar,cells,Mixed,perovskite,have,attracted,tremendous,attention,applications,due,their,excellent,power,conversion,efficiency,PCE,stability,light,heat,Although,evolution,photovoltaic,performance,different,environments,has,been,investigated,role,inorganic,cesium,enhancement,needs,further,clarified,Herein,structure,MAPbI3,planar,heterojunction,devices,under,up,were,studied,can,cohesive,energy,effectively,alleviate,lattice,strain,induced,thereby,enhancing,crystallinity,bandgap,changes,irradiated,identical,fluence,only,one,third,that,Upon,density,trap,states,undoped,increased,respectively,average,corresponding,decreased,This,proves,replacement,methylamine,contributes,improvement,thus,firming,prospects,mixed,spacecraft

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