Unraveling the roles of mesoporous TiO2 framework in CH3NH3PbI3 perovskite solar cells

作     者：Juntian Zhou Xiantao Wei Jun Zhu Xi Yang Haihong Niu Lei Wan Ping Jiang Jinzhang Xu Ru Zhou Guozhong Cao 周钧天;韦先涛;朱俊;杨熙;牛海红;万磊;江萍;徐进章;周儒;曹国忠

作者机构：School of Electrical Engineering and AutomationHefei University of TechnologyHefei 230009China School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230009China School of Instrument Science and Opto-electronics EngineeringHefei University of TechnologyHefei 230009China Department of Materials Science and EngineeringUniversity of WashingtonSeattleWA 98195USA 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第7期

页      面：1151-1162页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(51602088) the Open Fund of the Key Laboratory of Photovoltaic and Energy Conservation Materials,Chinese Academy of Sciences(PECL2019KF007) and China Postdoctoral Science Foundation(2017T100313) 

主　　题：perovskite solar cells CH3NH3PbI3 device architecture electron transporting layer electron extraction 

摘      要：Both of planar and mesoporous architectures prevail for perovskite solar cells(PSCs).However,it is still an open question how the architecture affects the performance of *** inconsistent results in the references often create *** particular,the specific roles of mesoporous frameworks are yet to be well elaborated and require further *** this study,we carefully compared the properties of perovskite films and the device performances for both architectures to unravel the roles of mesoporous TiO2 framworks in CH3NH3PbI3 *** detailed characterizations of structural,microscopic,optical and electrical properties revealed that the presence of mesoporous TiO2 framework contributed to enlarged perovskite crystal sizes,enhanced light harvesting,efficient electron extration and suppressed charge *** a result,compared with the planar device,the mesoporous device yielded an improved power conversion efficiency of 18.18%,coupled with a reduced *** study reveals the benefits of mesoporous TiO2 framework in PSCs and provides the guidance for the design and optimization of architectures for high-performance devices.