材料科学
钙钛矿(结构)
结晶
结晶度
能量转换效率
晶界
化学工程
润湿
粒度
热稳定性
成核
图层(电子)
光电子学
纳米技术
微观结构
复合材料
工程类
有机化学
化学
作者
Mengqi Wang,Wenwen Wu,Yulin Liu,Songyang Yuan,Dehua Tian,Cuili Zhang,Zhipeng Ma,Jiahuan Deng,Jianhui Chen,Zaizhu Lou,Wenzhe Li,Jiandong Fan
标识
DOI:10.1002/adfm.202300700
摘要
Abstract Despite inorganic CsPbI 3− x Br x perovskite solar cells (PSCs) being promising in thermal stability, the perovskite degradation and severe nonradiative recombination at the interface hamper their further development. Herein, the typical MXene material, that is, Ti 3 C 2 T x , is employed to be the buried interface prior to the perovskite absorber layer in the device, which multi‐functionalizes the as‐prepared electron‐transfer layers by means of both fascinating preferential crystallization of perovskite and/or accelerating the charge extraction with respect to an ideal energy‐level alignment and suppressed trap states. Accordingly, the power conversion efficiency of the modified PSC device is substantially enhanced by as high as 19.56% in comparison to their counterparts with only the pristine CsPbI 3− x Br x active layer. More importantly, MXene modification is favorable to improve the wettability of perovskite precursor solution with enhanced grain size and crystallinity, thereby increasing the UV long‐term stability of solar cells. This work provides a new paradigm toward alleviating the severe nonradiative recombination at the interface in the device whilst enhancing the long‐term stability via the preferential crystallization process.
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