Surface repair of wide-bandgap perovskites for high-performance all-perovskite tandem solar cells

作     者：Xiaojing Lv Weisheng Li Jin Zhang Yujie Yang Xuefei Jia Yitong Ji Qianqian Lin Wenchao Huang Tongle Bu Zhiwei Ren Canglang Yao Fuzhi Huang Yi-Bing Cheng Jinhui Tong Xiaojing Lv;Weisheng Li;Jin Zhang;Yujie Yang;Xuefei Jia;Yitong Ji;Qianqian Lin;Wenchao Huang;Tongle Bu;Zhiwei Ren;Canglang Yao;Fuzhi Huang;Yi-Bing Cheng;Jinhui Tong

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070HubeiChina Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of ChinaSchool of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina Department of Electrical and Electronic EngineeringPhotonics Research Institute(PRI)Research Institute for Intelligent Wearable Systems(iWEAR)The Hong Kong Polytechnic University999077Hong KongChina Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshan 528200GuangdongChina 

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

年 卷 期：2024年第93卷第6期

页      面：64-70,I0003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：financially supported by the National Natural Science Foundation of China(52330004) the Fundamental Research Funds for the Central Universities(WUT:2023IVA075 and 2023IVB009) the financial support from RISE project Grant(Q-CDBK) Start-up Fund for RAPs under the Strategic Hiring Scheme(PoluU)(1-BD1H) PRI Strategic Grant(1-CD7X) RI-iWEAR Strategic Supporting Scheme(1-CD94) 

主　　题：Wide-bandgap perovskite Surface defect Multifunctional molecule All-perovskite tandem solar cells 

摘      要：Wide-bandgap(WBG)perovskite solar cells(PSCs)play a fundamental role in perovskite-based tandem solar ***,the efficiency of WBG PSCs is limited by significant open-circuit voltage losses,which are primarily caused by surface *** this study,we present a novel method for modifying surfaces using the multifunctional S-ethylisothiourea hydrobromide(SEBr),which can passivate both Pb^(-1)and FA^(-1)terminated surfaces,Moreover,the SEBr upshifted the Fermi level at the perovskite interface,thereby promoting carrier *** proposed method was effective for both 1.67 and 1.77 eV WBG PSCs,achieving power conversion efficiencies(PCEs)of 22.47%and 19.90%,respectively,with V_(OC)values of 1.28 and 1.33 V,along with improved film and device *** this advancement,we were able to fabricate monolithic all-perovskite tandem solar cells with a champion PCE of 27.10%,This research offers valuable insights for passivating the surface trap states of WBG perovskite through rational multifunctional molecular engineering.