文献类型：期刊文献

英文题名：Immobilizing Surface Halide in Perovskite Solar Cells via Calix[4]pyrrole

作者：Guo, Huanxin[1,2];Wang, Xiaoyu[3];Li, Chengjie[1,2];Hu, Honglong[1,2];Zhang, Huidong[1,2];Zhang, Lijun[3];Zhu, Wei-Hong[1,2];Wu, Yongzhen[1,2]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Key Lab Adv Mat,Feringa Nobel Prize Scientist Join, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem,Feringa Nobel Priz, Shanghai 200237, Peoples R China;[3]Jilin Univ, Sch Mat Sci & Engn, State Key Lab Integrated Optoelect, Key Lab Automobile Mat,Minist Educ,Jilin Prov Int, Changchun 130012, Peoples R China

年份：2023

卷号：35

期号：26

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20232014089630);WOS:【SCI-EXPANDED(收录号:WOS:000986367700001)】；

基金：The work was supported by the National Natural Science Foundation of China (22179037), Shanghai pilotProgram for Basic Research (22TQ1400100-1), Program of Introducing Talents of Discipline to Universities (B16017), Innovation Program of Shanghai Municipal Education Commission (2021-01-07-00-02-E00107), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03, 21JC1401700). Thanks for the financial support of "Zhang Jiangshu" cultivation program.

语种：英文

外文关键词：electrode corrosion; halide complexation; perovskite solar cells; supramolecular interaction

摘要：Halide diffusion across the charge-transporting layer followed by a reaction with metal electrode represents a critical factor limiting the long-term stability of perovskite solar cells (PSCs). In this work, a supramolecular strategy with surface anion complexation is reported for enhancing the light and thermal stability of perovskite films, as well as devices. Calix[4]pyrrole (C[4]P) is demonstrated as a unique anion-binding agent for stabilizing the structure of perovskite by anchoring surface halides, which increases the activation energy for halide migration, thus effectively suppressing the halide-metal electrode reactions. The C[4]P-stabilized perovskite films preserve their initial morphology after ageing at 85 degrees C or under 1 sun illumination in humid air over 50 h, significantly outperforming the control samples. This strategy radically tackles the halide outward-diffusion issue without sacrificing charge extraction. Inverted-structured PSCs based on C[4]P modified formamidinium-cesium perovskite exhibit a champion power conversion efficiency of over 23%. The lifespans of unsealed PSCs are unprecedentedly prolonged from dozens of hours to over 2000 h under operation (ISOS-L-1) and 85 degrees C ageing (ISOS-D-2). When subjected to a harsher protocol of ISOS-L-2 with both light and thermal stresses, the C[4]P-based PSCs maintain 87% of original efficiency after ageing for 500 h.