Hole-Selective Contact with Molecularly Tailorable Reactivity for Passivating High-Performing Inverted Perovskite Solar Cells  

作　　者：Wenlin Jiang Yingie Hu Fengzhu Li Francis R.Lin Alex K-Y.Jen 

机构地区：[1]Department of Materials Science and Engineering,City University of Hong Kong,Kowloon,Hong Kong China 999077 [2]Department of Chemistry,City University of Hong Kong,Kowloon,Hong Kong China 999077 [3]Hong Kong Institute for Clean Energy,City University of Hong Kong,Kowloon,Hong Kong China 999077 [4]State Key Laboratory of Marine Pollution,City University of Hong Kong,Kowloon,Hong Kong China 999077

出　　处：《CCS Chemistry》2024年第7期1654-1661,共8页中国化学会会刊（英文）

基　　金：support from the CityU Infrastructure Support from Central (APRC;grant nos.9380086,9610419,9610492,and 9610508)of the City University of Hong Kong;the Guangdong-Hong Kong Technology Cooperation Funding Scheme (TCFS,grant no.GHP/018/20SZ);Midstream Research Programme for Universities (MRP)Grant (grant no.MRP/040/21X)from the Innovation and Technology Commission of Hong Kong;the Green Tech Fund (grant no.202020164)from the Environment and Ecology Bureau of Hong Kong;the General Research Fund (GRF,grant nos.11307621 and 11316422)from the Research Grants Council of Hong Kong;Shenzhen Science and Technology Program (grant no.SGDX20201103095412040);Guangdong Major Project of Basic and Applied Basic Research (grant no.2019B030302007).

摘　　要：The precisely customizable attributes of self-assembled monolayers(SAMs)molecules at the atomic level hold the potential to facilitate efficient hole selection and interface passivation simultaneously.However,the correlation between the exposure of passivating groups on the surface and device performance remains unexplored.Herein,we introduce two newly designed SAM molecules,Cbz2S and Cbz2SMe,incorporating cyclic disulfide or two flanking thiomethyls by modifying the 4,5-position of carbazole to adjust the Lewis basicity of the SAM-modified surface.Despite possessing suitable energetic alignment,Cbz2S with more-exposed sulfur atoms exhibited inferior device performance due to excessive reactivity,leading to an overpopulation of PbI2 crystallites at the buried perovskite interface.In contrast,the screening effect from the methyl groups of Cbz2SMe optimized SAM reactivity,exquisitely integrating buried interface passivation and hole selection together.Consequently,the champion inverted perovskite solar cell(PSC)employing Cbz2SMe achieved an impressive power conversion efficiency of 24.42%,accompanied by prolonged stability.This work demonstrates the feasibility of incorporating Lewis-basic passivation groups into SAM molecules and elucidates the relationship between the reactivity of SAM passivation groups and device performance.These findings provide valuable insights for the design of novel multifunctional SAM molecules,further advancing the performance of PSCs.

关 键 词：self-assembled monolayer perovskite solar cell hole-selective layer carbazole derivatives defect passivation 

分 类 号：O62[理学—有机化学]