Unveiling the key factor affecting the illumination deterioration and response measures for lead halide perovskite solar cells

作     者：Feihong Ye Haibing Wang Weijun Ke Chen Tao Guojia Fang Feihong Ye;Haibing Wang;Weijun Ke;Chen Tao;Guojia Fang

作者机构：School of Physics and TechnologyWuhan UniversityWuhan 430000HubeiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第10期

页      面：429-435,I0011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：the support of the National High Technology Research and Development Program(2015AA050601) the National Natural Science Foundation of China(12134010,62074117,61904126,12174290) the Natural Science Foundation of Hubei Province,China(Grant No.2019AAA020) the Fundamental Research Funds for the Central Universities(2042021kf0228) 

主　　题：Perovskite solar cell Degradation mechanism Light-induced halide ion migration MPP stability 

摘      要：So far,it s been widely acknowledged that the Pb I2decomposition under illumination mainly accounts for the degradation of perovskite solar cells(PSCs)under maximum power point(MPP)tracking ***,PSCs without excess Pb I2were also reported to deteriorate rapidly under the same ***,we demonstrate that the key to enhance PSCs stability under MPP tracking condition is not to have fascinating surface morphology with effective suppression of nonradiative recombination traps but to prevent the migration of iodine ion(I-)under light *** partially substituting methylammonium chloride(MACl)with methylammonium iodide(MAI)and simutaneouly introducing I2during the sequential deposition,the iodine vacancies in perovskite films are substantially suppressed,thereby limiting the pathways for I^(-)*** a consequence,PSCs with efficiency of 24.28%are fabricated with remarkably enhanced working stability.