典型文献
Surface Passivation and Energetic Modification Suppress Nonradiative Recombination in Perovskite Solar Cells
文献摘要：
Surface passivation via post-treatment is an important strategy for improving power conversion efficiency and operational stability of perovskite solar cells.However,so far the interaction mechanisms between passivating additive and perovskite are not well understood.Here,we report the atomic-scale interaction of surface pas-sivating additive 2,2-difluoroethylammonium bromine(2FEABr)on the MAPbI3.It is found that the bulky 2FEA+cations tend to distribute at film surface,while the Br-anions diffuse from surface into bulk.A combination of 19F,207Pb,and 2H solid-state NMR further reveal the Br-anions'partial substitution for the I-sites,the restricted motion of partial MA+cations,and the firmed perovskite lattices,which would improve charge transport and stability of the perovskite films.Optical spectroscopy and ultraviolet photoelectron spectroscopy demonstrate that the 2FEABr induced surface passivation and energetic modification suppress the nonradiative recombination loss.These findings enable the efficiency of the p-i-n structured PSC significantly increasing from 19.44 to 21.06％,accompanied by excellent stability.Our work further establishes more knowledge link between passivating additive and PSC performance.
文献关键词：
中图分类号：
作者姓名：
Wei Dong;Wencheng Qiao;Shaobing Xiong;Jianming Yang;Xuelu Wang;Liming Ding;Yefeng Yao;Qinye Bao
作者机构：
Shanghai Key Laboratory of Magnetic Resonance,East China Normal University,Shanghai 200241,People's Republic of China;School of Physics and Electronic Science,East China Normal University,Shanghai 200241,People's Republic of China;Center for Excellence in Nanoscience(CAS),Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS),National Center for Nanoscience and Technology,Beijing 100190,People's Republic of China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,Shanxi,People's Republic of China
文献出处：
引用格式：
[1]Wei Dong;Wencheng Qiao;Shaobing Xiong;Jianming Yang;Xuelu Wang;Liming Ding;Yefeng Yao;Qinye Bao-.Surface Passivation and Energetic Modification Suppress Nonradiative Recombination in Perovskite Solar Cells)[J].纳微快报（英文）,2022(07):32-42
A类：
Suppress,Nonradiative,sivating,difluoroethylammonium,2FEABr,2FEA+cations,MA+cations
B类：
Surface,Passivation,Energetic,Modification,Recombination,Perovskite,Solar,Cells,passivation,via,post,treatment,important,strategy,improving,power,conversion,efficiency,operational,stability,perovskite,solar,cells,However,far,interaction,mechanisms,between,passivating,additive,are,not,well,understood,Here,report,atomic,scale,surface,bromine,MAPbI3,It,found,that,bulky,tend,distribute,while,anions,diffuse,from,into,19F,207Pb,2H,solid,state,NMR,further,reveal,partial,substitution,sites,restricted,motion,firmed,lattices,which,would,improve,charge,transport,films,Optical,spectroscopy,ultraviolet,photoelectron,demonstrate,induced,energetic,modification,suppress,nonradiative,recombination,loss,These,findings,enable,structured,PSC,significantly,increasing,accompanied,by,excellent,Our,work,establishes,more,knowledge,link,performance
AB值：
0.614446
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