锡
材料科学
氟化物
结晶度
成核
Crystal(编程语言)
晶体生长
钙钛矿(结构)
薄膜
化学工程
无机化学
纳米技术
冶金
结晶学
复合材料
计算机科学
有机化学
化学
工程类
程序设计语言
作者
Min Xiao,Shuai Gu,Pengchen Zhu,Mingyao Tang,Jingjing Chang,Renxing Lin,Chuanlu Chen,Weichao Xu,Tao Yu,Jing Zhu
标识
DOI:10.1002/adom.201700615
摘要
Abstract Tin fluoride (SnF 2 ) is widely used as an effective additive for lead‐free tin‐based perovskite solar cells. However, the function of SnF 2 and the mechanism in improving the film morphology are still not clear. In this work, it is clearly demonstrated that SnF 2 can play a crucial role in the crystal nucleation process. Due to the limited solubility, SnF 2 creates more nucleuses for the crystal growth and therefore enables more uniform thin film with high coverage. It is confirmed that this mechanism can be applied to the growth of both thin film and single crystal. As a result of tin‐fluoride‐assisted heterogeneous nucleation, an MASnIBr 2 ‐based perovskite solar cell with a high and stable power conversion efficiency of 3.70% is demonstrated.
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