文献类型：期刊文献

英文题名：Surface chelation of cesium halide perovskite by dithiocarbamate for efficient and stable solar cells

作者：He, Jingjing[1];Liu, Junxian[2];Hou, Yu[1];Wang, Yun[2];Yang, Shuang[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Key Lab Ultrafine Mat,Minist Educ, 130Meilong Rd, Shanghai 200237, Peoples R China;[2]Griffith Univ, Sch Environm & Sci, Ctr Clean Environm & Energy, Gold Coast Campus, Brisbane, Qld 4222, Australia

年份：2020

卷号：11

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000567536300005)】；

基金：This work was financially supported by National Natural Science Funds for Distinguished Young Scholar (51725201), National Natural Science Foundation of China (51972111, 51602103, 51902185), Young Elite Scientists Sponsorship Program by CAST (2017QNRC001), International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China (51920105003), Innovation Program of Shanghai Municipal Education Commission (E00014), the Fundamental Research Funds for the Central Universities (JKD012016025, JKD012016022), and Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400). This research was also undertaken on the supercomputers at the National Computational Infrastructure (NCI) in Canberra, Australia, which is supported by the Australian Commonwealth Government, and Pawsey Supercomputing Centre in Perth with funding from the Australian Government and the Government of Western Australia.

语种：英文

摘要：Surface engineering has been shown critical for the success of perovskite solar cells by passivating the surface enriched defects and mobile species. The discovery of surface modulators with superior interaction strength to perovskite is of paramount importance since they can retain reliable passivation under various environments. Here, we report a chelation strategy for surface engineering of CsPbI2Br perovskite, in which dithiocarbamate molecules can be coordinate to surface Pb sites via strong bidentate chelating bonding. Such chelated CsPbI2Br perovskite can realize excellent passivation of surface under-coordinated defects, reaching a champion power conversion efficiency of 17.03% and an open-circuit voltage of 1.37V of CsPbI2Br solar cells. More importantly, our chelation strategy enabled excellent device stability by maintaining 98% of their initial efficiency for over 1400h in ambient condition. Our findings provide scientific insights on the surface engineering of perovskite that can facilitate the further development and application of perovskite optoelectronics.