文献类型：期刊文献

英文题名：Ultrafast Hole Transfer Mediated by a Conjugated Self-Assembled Monolayer Enables Efficient and Stable Wide-Bandgap Perovskite Solar Cells

作者：Guo, Yuxiao[1]; Guo, Shiyan[2]; Wu, Tai[3]; Zhan, Shaoqi[4]; Wei, Changting[1]; Luo, Xin[1]; Huang, Jinhai[5]; Su, Jianhua[2]; Hua, Yong[3]; Xu, Bo[1]

机构：[1] MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; [2] Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Centre, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] Yunnan Key Laboratory for Micro/Nano Materials & Technology, International Joint Research Center for Optoelectronic and Energy Materials, School of Materials Science and Engineering, Yunnan University, Yunnan, Kunming, 650091, China; [4] Department of Chemistry - ?ngstr?m, Uppsala University, Box 523, Uppsala, 751 20, Sweden; [5] Shanghai Nanoshine Technology Co., Ltd, Shanghai, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240230672)

语种：英文

外文关键词：Conversion efficiency - Energy gap - Hole mobility - Organic polymers - Perovskite solar cells - Self assembled monolayers

摘要：Charge accumulations and electron recombination at the interfaces between perovskites and charge transporting materials are two critical factors significantly hindering the power conversion efficiency (PCE) and device stability of wide-bandgap perovskite solar cells ( WBG PSCs). Herein, we tailor-made a self-assembled monolayer (SAM), termed XS13, featuring an enlarged π-donor and a π-linker, to regulate the interface carrier dynamics in ?1.8 eV WBG PSCs. Ultrafast spectroscopy clearly demonstrated that the XS13 facilitated the rapid extraction and transfer of photo-generated holes compared to the reference SAM-2PACz. Consequently, WBG PSCs based on XS13 achieved an outstanding PCE of up to 19.20%, surpassing that of control devices (16.41%). Furthermore, XS13-based WBG PSCs exhibited a remarkable suppression of light/electricity-induced halide ions migration, leading to significantly improved device stability. Our findings offer a new strategy for the rational design of hole transporting molecules with controlled properties to enhance device performance of PSCs. ? 2024, The Authors. All rights reserved.