六亚甲基四胺
钙钛矿(结构)
非阻塞I/O
能量转换效率
化学
分子
氧化物
材料科学
化学工程
纳米技术
光电子学
催化作用
结晶学
有机化学
工程类
作者
Jingxu Tian,Jihuai Wu,Yuhe Lin,Jialian Geng,Jialiang Shi,Wenhui Lin,Wenxuan Hao,Chaoran Ke,Jinhui Yang,Weihai Sun,Zhang Lan
标识
DOI:10.1002/ente.202201182
摘要
As a rising star in the photovoltaic field, perovskite solar cells (PSCs) have attracted extensive attention. However, the industrialization development of PSCs still faces the dual challenges of improving efficiency and stability. Herein, a cage polyamine molecule hexamethylenetetramine (HMTA) as additive is incorporated into the tin oxide electron transport layer (ETL). The introduction of HMTA improves the electron extraction ability of SnO 2 and optimizes the energy‐level alignment of function layers. The modification of HMTA also passivates the uncoordinated Pb 2+ in the perovskite and reduces the oxygen vacancy defects of SnO 2 , which alleviate trap‐state density and carrier nonradiative recombination. As a result, the PSC based on the SnO 2 ETL modified with HMTA achieves a high power conversion efficiency of 22.37% along with good stability. The research results demonstrate a typical case of using cage polyamines to improve the performance and stability of PSCs.
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