Enhanced efficiency and stability in Sn-based perovskite solar cells by trimethylsilyl halide surface passivation  

作　　者：Zheng Zhang Liang Wang Ajay Kumar Baranwal Shahrir Razey Sahamir Gaurav Kapil Yoshitaka Sanehira Muhammad Akmal Kamarudin Kohei Nishimura Chao Ding Dong Liu Yusheng Li Hua Li Mengmeng Chen Qing Shen Teresa SRipolles Juan Bisquert Shuzi Hayase 

机构地区：[1]Graduate School of Informatics and Engineering,University of Electro-Communication,1-5-1 Chofugaoka,Chofu,Tokyo 182-8585,Japan [2]Escuela Técnica Superior de Ingeniería de Telecomunicación,Universidad Rey Juan Carlos,Madrid 28933,Spain [3]Institute of Advanced Materials(INAM),Universitat Jaume I,Castelló12006,Spain

出　　处：《Journal of Energy Chemistry》2022年第8期604-611,I0016,共9页能源化学（英文版）

摘　　要：Lead free tin perovskite solar cells(PKSCs)are the most suitable alternative candidate for conventional lead perovskite solar cells.However,the efficiency and the stability are insufficient,mainly because of the poor film quality and numerous defects.Here we introduce an efficient strategy based on a simple trimethylsilyl halide surface passivation to increase the film quality and reduce the defect density.At the same time,a hydrophobic protective layer on the perovskite surface is formed,which enhanced the PKSCs’stability.The efficiency of the solar cell after the passivation was enhanced from 10.05%to 12.22%with the improved open-circuit voltage from 0.57 V to 0.70 V.In addition,after 92 days of storage in N_(2) filled glovebox,the modified T-PKSCs demonstrated high stability maintaining 80%of its initial efficiency.This work provides a simple and widely used strategy to optimize the surface/interface optoelectronic properties of perovskites for giving more efficient and stable solar cells and other optoelectronic devices.

关 键 词：Tin halide perovskite Trimethylsilyl halide Surface passivation STABILITY 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]