文献类型：期刊文献

英文题名：Functionalization of perovskite thin films with moisture-tolerant molecules

作者：Yang, Shuang[1];Wang, Yun[2];Liu, Porun[2];Cheng, Yi-Bing[3];Zhao, Hui Jun[2];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Southport, Qld 4111, Australia;[3]Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia

年份：2016

卷号：1

期号：2

外文期刊名：NATURE ENERGY

收录：;EI(收录号：20181404980330);WOS:【SCI-EXPANDED(收录号:WOS:000394096700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21373083) and Fundamental Research Funds for the Central Universities (WD1313009). This research was undertaken in the NCI National Facility in Canberra, Australia, which is supported by the Australian Commonwealth Government.

语种：英文

外文关键词：organic-inorganic materials - Perovskite solar cells - Thin films

摘要：Organic-inorganic hybrid perovskites are particularly suited as light-harvesting materials in photovoltaic devices. The power conversion efficiency of perovskite solar cells has reached certified values of over 20% in just a few years. However, one of the major hindrances for application of these materials in real-world devices is the performance degradation in humid conditions, leading to a rapid loss of photovoltaic response. Here, we demonstrate that hydrophobic tertiary and quaternary alkyl ammonium cations can be successfully assembled on the perovskite surface as efficient water-resisting layers via a facile surface functionalization technique. Such layers can protect the perovskite film under high relative humidity ( 90 +/- 5%) over 30 days. More importantly, devices based on such films can retain the photovoltaic capacities of bulk perovskites, with power conversion efficiencies over 15%. Improving the humidity tolerance of perovskite materials is a necessary step towards large-scale production of high- performance perovskite-based devices under ambient humidity.