Phase-stable wide-bandgap perovskites enabled by suppressed ion migration  

作　　者：Zhiyu Gao Yu Zhu Jingwei Zhu Cong Chen Zongjin Yi Yi Luo Yuliang Xu Kai Wu Tianshu Ma Fangfang Cao Zijun Chen Fang Yao Juncheng Wang Wenwu Wang Chuanxiao Xiao Hao Huang Hongxiang Li Qianqian Lin Pei Cheng Changlei Wang Xia Hao Guanggen Zeng Dewei Zhao 

机构地区：[1]College of Materials Science and Engineering&Institute of New Energy and Low-Carbon Technology&Engineering Research Center of Alternative Energy Materials and Devices,Ministry of Education,Sichuan University,Chengdu 610065,Sichuan,China [2]School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology,Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,Jiangsu,China [3]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Zhejiang,China [4]Ningbo New Materials Testing and Evaluation Center Co.Ltd,Ningbo 315201,Zhejiang,China [5]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structure&School of Resources,Environment and Materials,Guangxi University,Nanning 530004,Guangxi,China [6]Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of China,School of Physics and Technology,Wuhan University,Wuhan 430072,Hubei,China [7]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,Sichuan,China

出　　处：《Journal of Energy Chemistry》2024年第9期120-128,共9页能源化学（英文版）

基　　金：financially supported by the National Key R&D Program of China (2022YFB4200304);the National Natural Science Foundation of China (52303347);the Fundamental Research Funds for the Central Universities (YJ2021157);the Engineering Featured Team Fund of Sichuan University (2020SCUNG102);open foundation of Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University (2022GXYSOF05);the support from the National Natural Science Foundation of China (E30853YM19)

摘　　要：Wide-bandgap(>1.7 eV)perovskites suffer from severe light-induced phase segregation due to high bromine content,causing irreversible damage to devices stability.However,the strategies of suppressing photoinduced phase segregation and related mechanisms have not been fully disclosed.Here,we report a new passivation agent 4-aminotetrahydrothiopyran hydrochloride(4-ATpHCl)with multifunctional groups for the interface treatment of a 1.77-eV wide-bandgap perovskite film.4-ATpH^(+)impeded halogen ion migration by anchoring on the perovskite surface,leading to the inhibition of phase segregation and thus the passivation of defects,which is ascribed to the interaction of 4-ATpH^(+)with perovskite and the formation of low-dimensional perovskites.Finally,the champion device achieved an efficiency of 19.32%with an open-circuit voltage(V_(OC))of 1.314 V and a fill factor of 83.32%.Moreover,4-ATpHCl modified device exhibited significant improved stability as compared with control one.The target device maintained 80%of its initial efficiency after 519 h of maximum power output(MPP)tracking under 1 sun illumination,however,the control device showed a rapid decrease in efficiency after 267 h.Finally,an efficiency of 27.38%of the champion 4-terminal all-perovskite tandem solar cell was achieved by mechanically stacking this wide-bandgap top subcell with a 1.25-eV low-bandgap perovskite bottom subcell.

关 键 词：Wide-bandgap perovskite Phase segregation lon migration Interface post-treatment All-perovskite tandems 

分 类 号：TB34[一般工业技术—材料科学与工程]