钙钛矿(结构)
材料科学
铬
能量转换效率
热稳定性
载流子
价(化学)
化学工程
金属
纳米技术
无机化学
光电子学
化学
有机化学
工程类
冶金
作者
Songyang Yuan,Yeming Xian,Long Yi,Andreu Cabot,Wenzhe Li,Jiandong Fan
标识
DOI:10.1002/adfm.202106233
摘要
Abstract Inorganic CsPbI x Br 3− x perovskite solar cells (PSCs) have gained enormous interest due to their excellent thermal stabilities. However, their intrinsically poor moisture stability hampers their further development. Herein, a chromium‐based metal–organic framework group is intercalated inside the inorganic PbI framework, resulting in a new multiple‐dimensional electronically coupled CsPbI 2 Br perovskite. In this structurally and electronically coupled perovskite, the π‐conjugated terpyridyl can delocalize the excited valence electrons of metal Cr 3+ ion, enabling multi‐interactive charge‐carrier transport channels within CsPbI 2 Br perovskites. The stability and efficiency of the produced devices are substantially enhanced in comparison to their counterparts with only a pristine CsPbI 2 Br active layer. The optimized all‐inorganic PSC yields a power conversion efficiency (PCE) as high as 17.02%. Remarkably, the stabilized device retains 80% of its PCE after 1000 h in the ambient atmosphere. This study provides a new paradigm toward addressing the stability challenge of the inorganic perovskite while enhancing its carrier transport ability.
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