材料科学
钝化
能量转换效率
钙钛矿(结构)
载流子寿命
化学工程
氧化锡
氧化物
光电子学
光伏系统
图层(电子)
锡
氧化铟锡
纳米技术
兴奋剂
硅
冶金
工程类
生物
生态学
作者
Ping Yang,Jihuai Wu,Jinhui Yang,Chaoran Ke,Lin Wang,Yipeng Huang,Jingxu Tian,Ying Wang,Weihai Sun,Zhang Lan,Jianming Lin
标识
DOI:10.1016/j.surfin.2023.103700
摘要
Perovskite solar cells (PSCs) have been extensively studied owing to their excellent photovoltaic performance. Tin oxide (SnO2) is an ideal electron transport material for PSCs. However, owing to nanoparticle agglomeration and defects, the excellent performance of SnO2 cannot be effectively utilized. In this article, a multifunctional additive guanidinium phosphate (GP) is introduced into SnO2. The modification of GP not only improves the surface properties of the electron transport layer (ETL) and the crystalline quality of the perovskite layer (PVK), but also passivates the double-sided defects and suppresses the non-radiative carrier recombination, as well as enhances the electron extraction ability and harmonizes the energy level alignment between the ETL and PVK. Consequently, the GP-modified device achieves a power conversion efficiency (PCE) of 23.91% and a fill factor (FF) of up to 83.45%. In addition, the unencapsulated device maintains over 90% of its starting efficiency after being aged under 25 ℃ and 40 ± 10% relative humidity (RH) for 1000 h. The results demonstrate that the introduction of GP is an effective strategy to enhance the performance and stability of PSCs.
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