In situ polymerization of water-induced 1,3-phenylene diisocyanate for enhanced efficiency and stability of inverted perovskite solar cells  

作　　者：Shiyao Jia Jiabao Yang Tong Wang Xingyu Pu Hui Chen Xilai He Guangpeng Feng Xingyuan Chen Yijun Bai Qi Cao Xuanhua Li 

机构地区：[1]State Key Laboratory of Solidification Processing,Center for Nano Energy Materials,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an,China

出　　处：《Interdisciplinary Materials》2024年第2期316-325,共10页交叉学科材料（英文）

基　　金：Shaanxi Science Fund for Distinguished Young Scholars,Grant/Award Number:2022JC-21;Postdoctoral Research Project Funding in Shaanxi Province;National Natural Science Foundation of China,Grant/Award Numbers:22261142666,52372225,52172237,22305191,21975205;Science,Technology,and Innovation Commission of Shenzhen Municipality,Grant/Award Number:GJHZ20220913143204008。

摘　　要：In the realm of photovoltaics,organometallic hybridized perovskite solar cells(PSCs)stand out as promising contenders for achieving high-efficiency photoelectric conversion,owing to their remarkable performance attributes.Nevertheless,defects within the perovskite layer,especially at the perovskite grain boundaries and surface,have a substantial impact on both the overall photoelectric performance and long-term operational stability of PSCs.To mitigate this challenge,we propose a method for water-induced condensation polymerization of small molecules involving the incorporation of 1,3-phenylene diisocyanate(1,3-PDI)into the perovskite film using an antisolvent technique.Subsequent to this step,the introduction of water triggers the polymerization of[P(1,3-PDI)],thereby facilitating the in situ passivation of uncoordinated lead defects inherent in the perovskite film.This passivation process demonstrates a notable enhancement in both the efficiency and stability of PSCs.This approach has led to the attainment of a noteworthy power conversion efficiency(PCE)of 24.66% in inverted PSCs.Furthermore,based on the P(1,3-PDI)modification,these devices maintain 90.15% of their initial efficiency after 5000 h of storage under ambient conditions of 25℃ and 50±5% relative humidity.Additionally,even after maximum power point tracking for 1000 h,the PSCs modified with P(1,3-PDI)sustain 82.05% of the initial PCE.Small molecules can rationally manipulate water and turn harm into benefit,providing new directions and methods for improving the efficiency and stability of PSCs.

关 键 词：antisolvent engineering defect passivation inverted perovskite solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]