Facile surface regulation for highly efficient and thermally stable perovskite solar cells via chlormequat chloride

作     者：Bo Yang Pu-An Lin Tingwei Zhou Xiaojia Zheng Bing Cai Wen-Hua Zhang Bo Yang;Pu-An Lin;Tingwei Zhou;Xiaojia Zheng;Bing Cai;Wen-Hua Zhang

作者机构：Institute of Chemical MaterialsChina Academy of Engineering PhysicsMianyang 621900China School of Physical Science and TechnologySouthwest UniversityChongqing 400715China Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon TechnologiesSchool of Materials and EnergyYunnan UniversityKunming 650000China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第10期

页      面：517-523页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 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：supported by the National Natural Science Foundation of China(No.21773218) and Huacai Solar Co.,Ltd 

主　　题：Perovskite solarcells Quaternary ammonium halide Chlormequat chloride Surface modulation Thermal stability 

摘      要：Defects at the surface and grain boundaries of the perovskite films are extremely detrimental to both the efficiency and stability of perovskite solar cells(PSCs).Herein,a simple and stable quaternary ammonium halide,named chlormequat chloride(i.e.,chlorinated choline chloride,CCC),is introduced to regulate the upper surface chemical environment of perovskite *** anion(Cl^(-))and cation[ClCH_(2)CH_(2)N(CH_(3))_(3)]+in CCC could effectively self-search and passivate positively and negatively charged ionic defects in per ovskites,respectively,which contributes to inhibited nonradiative recombination and reduced energy los in *** a result,the champion power conversion efficiency(PCE)of PSCs can be significantly enhanced from 22.82%to 24.07%.Moreover,the unencapsulated device with CCC modification retains 92.0%of it original PCE even subject to thermal aging at 85℃ for 2496 *** work provides guidance for the ratio nal design of functional molecules as defect passivators in PSCs,which is beneficial for the improvement in both device performance and stability.