An Efficient 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 

机构地区：[1]CAS Key Laboratory of Organic Solids,Beijing National Laboratory for Molecular Sciences,Institute of Chemistry Chinese Academy of Sciences,Beijing 100190,People’s Republic of China [2]University of Chinese Academy of Sciences,Beijing 100190,People’s Republic of China [3]Department of Physics,Xiamen University,Xiamen 361005,People’s Republic of China [4]CAS Key Laboratory of Analytical Chemistry for Living Biosystems,Beijing National Laboratory for Molecular Sciences,Institute of Chemistry Chinese Academy of Sciences,Beijing 100190,People’s Republic of China [5]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450000,People’s Republic of China

出　　处：《Nano-Micro Letters》2020年第12期251-263,共13页纳微快报（英文版）

基　　金：Financial support for this research is provided by 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 efficiently block moisture and oxygen to prolong the device lifetime.As a result,PEA-treated MAPbI3(MA:CH3NH3)solar cells show increased power conversion efficiency(PCE)(from 17.18 to 18.87%)and good longterm stability.When PEA is introduced to(FAPbI3)1-x(MAPbBr3)x(FA:HC(NH2)2)solar cells,the PCE is enhanced from 19.66 to 21.60%.For both perovskites,their severe device hysteresis is efficiently relieved by PEA.

关 键 词：Defects Grain boundaries PASSIVATION Stability Perovskite solar cells 

分 类 号：TQ317[化学工程—高聚物工业] TM914.4[电气工程—电力电子与电力传动]