In-situ photoisomerization of azobenzene to inhibit ion-migration for stable high-efficiency perovskite solar cells

作     者：Xuejiao Zuo Yiyang He Hongyu Ji Yong Li Xiuying Yang Binxun Yu Tao Wang Zhike Liu Wenliang Huang Jing Gou Ningyi Yuan Jianning Ding Shengzhong Frank Liu Xuejiao Zuo;Yiyang He;Hongyu Ji;Yong Li;Xiuying Yang;Binxun Yu;Tao Wang;Zhike Liu;Wenliang Huang;Jing Gou;Ningyi Yuan;Jianning Ding;Shengzhong Frank Liu

作者机构：Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina School of Materials Science and EngineeringJiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Province Cultivation Base for StateKey Laboratory of Photovoltaic Science and TechnologyChangzhou UniversityChangzhou 213164JiangsuChina 

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：556-564,I0014页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 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）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(21603140) the 111 Project(B21005) 

主　　题：Perovskite Solar cell Photovoltaic Photoisomerization 

摘      要：Ion migration is a notorious problem in perovskite solar cells(PSCs)that severely mutilates device ***,a strategy to inhibit ion migration in situ is developed by using photoisomerization of azobenzene(AZO)to immobilize cations in the *** the nucleation process,the photoisomerized cis-AZO reacts with FA^(+),MA^(+)and Pb2+cations in the perovskite precursor by synergistic cation-πinteraction and Lewis base coordination,leading to heterogeneous nucleation to produce uniform perovskite ***,it accelerates conversion of intermediate yellowδ-phase to desired black aphase of FAPb I3for improved crystallinity with well-passivated grain ***,defect density is effectively reduced for the perovskite film to demonstrate suppressed carrier recombination and enhanced carrier ***,the solar cell efficiency is elevated from 21.29%to 23.58%with negligible J-V ***-term stability is also improved,with the bare device without any encapsulation retaining 84%of its initial efficiency after aging 744 hours in ambient.