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Efficient and stable planar all-inorganic perovskite solar cells based on high-quality CsPbBr3 films with controllable morphology

查看全文 作　　者：Xiaojing [1]Wan;Ze [1]Yu;Wenming [2]Tian;Fuzhi [3]Huang;Shengye [2]Jin;Xichuan [1]Yang;Yi-Bing [3,4]Cheng;Anders [5]Hagfeldt;Licheng [1,6]Sun 高影响力作者 机构地区：[1]State Key Laboratory of Fine Chemicals,Institute of Artificial Photosynthesis,DUT-KTH Joint Education and Research Center on Molecular Devices,Institute of Energy Science and Technology,Dalian University of Technology(DUT),Dalian 116024,Liaoning,China;[2]State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;[3]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Luoshi Road,Wuhan 430070,Hubei,China;[4]The Australian Centre for Advanced Photovoltaics(ACAP),Monash University,Victoria 3800,Australia;[5]Laboratory of Photomolecular Science,Ecole Polytechnique Federale de Lausanne,Lausanne CH-1015,Switzerland;[6]Department of Chemistry,School of Engineering Sciences in Chemistry,Biotechnology and Health,KTH Royal Institute of Technology,Stockholm 10044高影响力机构 出　　处：《Journal of Energy Chemistry》索引2020年第29卷第7期,共9页高影响力期刊 基　　金：financial support by the National Natural Science Foundation of China(21975038,21606039,and 51661135021);the Swiss National Science Foundation(IZLCZ2_170177);the Fundamental Research Funds for the Central Universities(DUT17JC39);the Swedish Foundation for Strategic Research(SSF);the Swedish Energy Agency;the Knut and Alice Wallenberg Foundation。 摘　　要：All-inorganic cesium lead bromide(CsPbBr3)perovskite is attracting growing interest as functional materials in photovoltaics and other optoelectronic devices due to its superb stability.However,the fabrication of high-quality CsPbBr3 films still remains a big challenge by solution-process because of the low solubility of the cesium precursor in common solvents.Herein,we report a facile solution-processed approach to prepare high-quality CsPbBr3 perovskite films via a two-step spin-coating method,in which the Cs Br methanol/H2 O mixed solvent solution is spin-coated onto the lead bromide films,followed by an isopropanol-assisted post-treatment to regulate the crystallization process and to control the film morphology.In this fashion,dense and uniform CsPbBr3 films are obtained consisting of large crystalline domains with sizes up to microns and low defect density.The effectiveness of the resulting CsPbBr3 films is further examined in perovskite solar cells(PSCs)with a simplified planar architecture of fluorine–doped tin oxide/compact Ti O2/CsPbBr3/carbon,which deliver a maximum power conversion efficiency of 8.11%together with excellent thermal and humidity stability.The present work offers a simple and effective strategy in fabrication of high-quality CsPbBr3 films for efficient and stable PSCs as well as other optoelectronic devices. 关 键 词：All-inorganic perovskite solar cells CsPbBr3 Morphology control Solution-processed Stability
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