Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic

查看全文 作　　者：Lingfeng [1]Chao;Tingting [1]Niu;Hao [2]Gu;Yingguo [3]Yang;Qi [1]Wei;Yingdong [2]Xia;Wei [2]Hui;Shouwei [4]Zuo;Zhaohua [2]Zhu;Chengjie [2]Pei;Xiaodong [5]Li;Jing [4]Zhang;Junfeng [5]Fang;Guichuan [6]Xing;Hai [2]Li;Xiao [2]Huang;Xingyu [3]Gao;Chenxin [1]Ran;Lin [1]Song;Li [1]Fu;Yonghua [1,2]Chen;Wei [1,2,7]Huang

机构地区：[1]Frontiers Science Center for Flexible Electronics,Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&Engineering,Northwestern Polytechnical University,127 West Youyi Road,Xi’an 710072,China;[2]Key Laboratory of Flexible Electronics(KLOFE)&Institution of Advanced Materials(IAM),Nanjing Tech University(Nanjing Tech),Nanjing,211816 Jiangsu,China;[3]Shanghai Synchrotron Radiation Facility,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China;[4]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;[5]School of Physics and Electronic Science,Ministry of Education,Nanophotonics&Advanced Instrument Engineering Research Center,East China Normal University,Shanghai 200062,China;[6]Institute of Applied Physics and Materials Engineering,University of Macao,Macao,Macao SAR 999078,China;[7]Key Laboratory for Organic Electronics&Information Displays(KLOEID)and Institute of Advanced Materials(IAM),Nanjing University of Posts and Telecommunications,Nanjing,210023 Jiangsu,China

出　　处：《Research》索引2020年第1期,共13页

基　　金：This work was financially supported by the Natural Science Foundation of China(Grants 51972172,61705102,and 91833304);the Natural Science Basic Research Plan in Shaanxi Province of China(2019JM-326);the Young 1000 Talents Global Recruitment Program of China;the Fundamental Research Funds for the Central Universities;This work also was financially supported by the National Key Research and Development Program of China(grant no.2017YFA0403400). 摘　　要：Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells(PSCs)with a simple one-step air processing and without an antisolvent treatment approach.However,it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy.Here,we unambiguously demonstrate that the three functions of solvents,additive,and passivation are present for protic amine carboxylic acid ILs.We found that the ILs have the capability to dissolve a series of perovskite precursors,induce oriented crystallization,and chemically passivate the grain boundaries.This is attributed to the unique molecular structure of ILs with carbonyl and amine groups,allowing for strong interaction with perovskite precursors by forming C=O…Pb chelate bonds and N-H…I hydrogen bonds in both solution and film.This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics. 关键词：PEROVSKITE BONDS BREAKTHROUGH

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Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic

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