Upgraded antisolvent engineering enables 2D@3D quasi core-shell perovskite for achieving stable and 21.6%efficiency solar cells  

作　　者：Fengyou Wang Jinyue Du Yuhong Zhang Meifang Yang Donglai Han Lili Yang Lin Fan Yingrui Sui Yunfei Sun Jinghai Yang 

机构地区：[1]Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,China [2]National Demonstration Center for Experimental Physics Education,Jilin Normal University,Siping 136000,China [3]Key Laboratory of Preparation and Application of Environmental Friendly Materials,Ministry of Education,Jilin Normal University,Changchun 130103,China [4]School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China

出　　处：《Journal of Materials Science & Technology》2021年第33期21-30,共10页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.61775081,11904127,22075101,61904066,61705020,and 51902126);the Program for the Development of Science and Technology of Jilin Province(Nos.20200801032GH and 20190103002JH);the Thirteenth FiveYear Program for Science and Technology of Education Department of Jilin Province(Nos.JJKH20190998KJ,JJKH20200417KJ and JJKH20190550KJ);the Special Project of Industrial Technology Research and Development in Jilin Province(No.2019C042-2);the Construction Program for Innovation Research Team of Jilin Normal University(No.201703)。

摘　　要：Perovskite solar cells(PSCs)have become a promising alternative to sustainable energy due to their high power conversion efficiency(PCE)and low-cost processing.However,the practical applications of PSCs are still limited by the trade-off between high performance and poor stability under operation.Here,a2D@3D perovskite with quasi core-shell architecture linking the superiorities of both two-dimensional(2D)and three-dimensional(3D)perovskite is prepared through a novel upgraded antisolvent approach.The basic properties as well as the phase distribution and the charge transport behavior of the 2D@3D perovskite were systematically elucidated.A high PCE of 21.60%for 2D@3D PSCs is achieved due to the enhanced surface and grain boundaries passivation,improved energy level alignment and efficient holes transport.The 2D@3D perovskite device without encapsulation shows significantly improved stability at the room temperature(90%of initial PCE for 45 d with a relative humidity of 50%±5%)and relative thermal conditions(83%of initial PCE for 200 h under 85℃).Compared with traditional 3D PSCs,it proved that such 2D@3D perovskite configuration is an effective architecture for enhancing efficiency and improving stability and therefore will facilitate the further industrialization of PSCs.

关 键 词：Low-cost processing Surface and grain boundaries Two-dimensional materials EFFICIENCY Stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]