Ionic Liquid Assisted Imprint for Efficient and Stable Quasi-2D Perovskite Solar Cells with Controlled Phase Distribution  

作　　者：Haibin Peng Dengxue Li Zongcai Li Zhi Xing Xiaotian Hu Ting Hu Yiwang Chen 

机构地区：[1]Department of Polymer Materials and Engineering,School of Physics and Materials Science,Nanchang University,999 Xuefu Avenue,Nanchang 330031,People’s Republic of China [2]College of Chemistry and Chemical Engineering,Institute of Polymers and Energy Chemistry(IPEC),Nanchang University,999 Xuefu Avenue,Nanchang 330031,People’s Republic of China [3]National Engineering Research Center for Carbohydrate Synthesis/Key,Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education,Jiangxi Normal University,99 Ziyang Avenue,Nanchang 330022,People’s Republic of China [4]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第7期1-15,共15页纳微快报（英文版）

基　　金：support from the National Natural Science Foundation of China(NSFC)(52163019,22005131,52173169 and U20A20128);support from the Natural Science Foundation of Jiangxi Province(20224ACB214006)。

摘　　要：Although two-dimensional perovskite devices are highly stable,they also lead to a number of challenges.For instance,the introduction of large organic amines makes crystallization process complicated,causing problems such as generally small grain size and blocked charge transfer.In this work,imprint assisted with methylamine acetate were used to improve the morphology of the film,optimize the internal phase distribution,and enhance the charge transfer of the perovskite film.Specifically,imprint promoted the dispersion of spacer cations in the recrystallization process with the assistance of methylamine acetate,thus inhibited the formation of low-n phase induced by the aggregation of spacer cations and facilitated the formation of 3D-like phase.In this case,the corresponding quasi-2D perovskite solar cells delivered improved efficiency and exhibited superior stability.Our work provides an effective strategy to obtain uniform phase distribution for quasi-2D perovskite.

关 键 词：IMPRINT Two-dimensional perovskite Phase distribution Charge transfer Stability 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]