共轭体系
钙钛矿(结构)
材料科学
化学
结晶学
复合材料
聚合物
作者
Haowei Guan,Jieyun Wu,Daobin Yang,Lisha Xie,Wei Zhang,Jixiu Shan,Zhongqiang Wang,Yuanyuan Meng,Jintao Zhu,Fei Chen,Yubo Zhou,Ziyi Ge
标识
DOI:10.1002/anie.202418606
摘要
Interfacial issues between the perovskite film and electron transport layer greatly limit the efficiency and stability of inverted (p‐i‐n) perovskite solar cells (PSCs). Despite organic ammonium passivants have been widely established as interfacial layers, they failed to improve electron extraction. Here, we reported that the heavy n‐type characteristics in a low bandgap perovskite film could be modulated by incorporating non‐conjugated ammonium passivants with strong electron‐withdrawing abilities. This resulted in a significant enhancement of electron extraction in the heavily n‐type doped perovskite. The passivant‐treated PSCs exhibited a power conversion efficiency of 25.74% with an excellent fill factor of 85.4% and a high open‐circuit voltage of 1.166 V, which are significantly higher than that of the control device. The unencapsulated devices maintained 88% of their initial PCEs after 1,200 hours at 85 °C.
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