Efficient and stable Ruddlesden-Popper layered tin-based perovskite solar cells enabled by ionic liquid-bulky spacers

作     者：Jian Qiu Yuexin Lin Xueqin Ran Qi Wei Xingyu Gao Yingdong Xia Peter Müller-Buschbaum Yonghua Chen Jian Qiu;Yuexin Lin;Xueqin Ran;Qi Wei;Xingyu Gao;Yingdong Xia;Peter Müller-Buschbaum;Yonghua Chen

作者机构：Key Laboratory of Flexible Electronics(KLOFE)&Institution of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing211816China Frontiers Science Center for Flexible ElectronicsXi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi’an710072China Shanghai Synchrotron Radiation FacilityShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201204China Lehrstuhl für Funktionelle MaterialienPhysik DepartmentTechnische Universität München85748GarchingGermany Heinz Maier-Leibnitz Zentrum(MLZ)Technische Universität München85748GarchingGermany 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2021年第64卷第9期

页      面：1577-1585页

核心收录：

学科分类：08[工学] 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 Natural Science Foundation of China(51972172,61705102,61605073,61935017,91833304,91733302) the National Key R&D Program of China(2017YFB1002900) Projects of International Cooperation and Exchanges NSFC(51811530018) Young 1000 Talents Global Recruitment Program of China Jiangsu Specially-Appointed Professor program “Six talent peaks”Project in Jiangsu Province,China 

主　　题：lead-free Ruddlesden-Popper phase Sn-based perovskite solar cells ionic liquid-bulky spacer crystallization kinetic control 

摘      要：The crucial component,bulky spacers,in two-dimensional Ruddlesden-Popper(2 DRP)layered tin(Sn)perovskites are highly limited by halide ammonium salts,leading to the insufficient control of complex crystallization process due to the limited interaction between bulky spacers and 2 DRP perovskite ***,we report an ionic liquid-bulky spacer,butylammounium acetate(BAAc O),for constructing efficient and stable 2 DRP Sn-based perovskite solar cells(PSCs).In contrast to the traditional halide ammonium bulky spacer,butylammounium iodide(BAI),the Ac O^(-)-functional group in BAAc O has a strong interaction with formamidine ions(FA^(+))and Sn2+.The inter-component interaction allows the formation of controllable intermediates for the favorable growth of smooth,dense,and highly oriented perovskite films.A PSC with power conversion efficiency of 10.36%(7.16%for BAI)is achieved,which is the highest report,along with improved stability with~90%retained after~600 h storage in N_(2) atmosphere without any encapsulation.