Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

作     者：Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang 

作者机构：Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) 

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

年 卷 期：2025年第100卷第1期

页      面：87-93页

核心收录：

学科分类：08[工学] 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 financial support of National Key Research and Development Program of China (Grant No.2022YFB04200302) the joint funds of National Natural Science Foundation of China (Grant No. 62104115) the National Natural Science Foundation of China (Grant No. U21A2072) the Overseas Expertise Introduction Project for Discipline Innovation of Higher Education of China (Grant No. B16027) the Key R&D Program of Hebei Province (No. 19214301D) the Yunnan Provincial Science and Technology Project at Southwest United Graduate School(No. 202302A0370009) the Haihe Laboratory of Sustainable Chemical Transformations the Fundamental Research Funds for the Central Universities,Nankai University 

主　　题：Inverted inorganic perovskite solar cells Flexible molecules Strain release Crystallization Energy barrier High PCE 

摘      要：The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pullthe perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.