钝化
材料科学
钙钛矿(结构)
佩多:嘘
晶界
化学工程
能量转换效率
甲基丙烯酸甲酯
热稳定性
载流子寿命
聚合物
图层(电子)
光电子学
纳米技术
聚合
复合材料
硅
微观结构
工程类
作者
Meng Zhang,Fanghui Zhang,Kewang Shi,Wenxi Zhang,Jin Huang,Huimin Qiu
标识
DOI:10.1007/s11801-022-1187-6
摘要
Inorganic perovskite solar cells (IPSCs) have attained attention due to their excellent thermal and phase stability. In this work, we demonstrate a novel approach for fabricating IPSCs, using the strategies of interface passivation and anti-solvent before spin-coating perovskite. Poly(methyl methacrylate) (PMMA) and chlorobenzene (CB) are used as passivator and anti-solvent, respectively. The CB improves the perovskite crystal morphology. Meanwhile, PMMA passivates the defects between poly(3, 4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT: PSS) and perovskite layer, thus increasing the short-circuit current. Excitingly, we find that PMMA benefits the grain boundaries (GBs) of perovskite, which makes it more humidity-resistant, increasing the stability of perovskite film. Especially, PMMA mitigates interfacial charge losses, and the devices based on CsPbI3−xBrx passivated by PMMA exhibit the power conversion efficiency (PCE) much higher than those based on pure CsPbI3−xBrx.
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