An Effcient Trap Passivator for Perovskite Solar Cells: Poly(propylene glycol) bis(2-aminopropyl ether)

作     者：Ningli Chen Xiaohui Yi Jing Zhuang Yuanzhi Wei Yanyan Zhang Fuyi Wang Shaokui Cao Cheng Li Jizheng Wang 

作者机构：CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Physics Xiamen University CAS Key Laboratory of Analytical Chemistry for Living Biosystems Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences School of Materials Science and Engineering Zhengzhou University 

出 版 物：《Nano-Micro Letters》 (纳微快报(英文))

年 卷 期：2020年第12卷第12期

页      面：255-267页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Key Research Program of China (2016YFA0200104) the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB12030200) 

摘      要：Perovskite solar cells(PSCs) are regarded as promising candidates for future renewable energy production. High-density defects in the perovskite films, however, lead to unsatisfactory device performances. Here, poly(propylene glycol) bis(2-aminopropyl ether)(PEA) additive is utilized to passivate the trap states in perovskite. The PEA molecules chemically interact with lead ions in perovskite, considerably passivate surface and bulk defects, which is in favor of charge transfer and extraction. Furthermore, the PEA additive can e ciently block moisture and oxygen to prolong the device lifetime. As a result, PEA-treated MAPb I3(MA: CH3NH3) solar cells show increased power conversion e ciency(PCE)(from 17.18 to 18.87%) and good longterm stability. When PEA is introduced to(FAPb I3)1-x(MAPb Br3)x(FA: HC(NH2)2) solar cells, the PCEffis enhanced from 19.66 to 21.60%. For both perovskites, their severe device hysteresis is e ciently relieved by PEA.