甲脒
X射线光电子能谱
材料科学
结晶
涂层
钙钛矿(结构)
碘化物
化学工程
Crystal(编程语言)
旋涂
结晶学
纳米技术
化学
计算机科学
无机化学
工程类
程序设计语言
作者
Yan Xiang,Mingshan Zhu,Yuelong Huang,Wenfeng Zhang,Changtao Peng,Haijin Li
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-10-29
卷期号:4 (11): 12091-12098
被引量:5
标识
DOI:10.1021/acsaem.1c01568
摘要
FAMACs triple-cation perovskite is an excellent organic–inorganic perovskite material widely used in solar cells, light-emitting diodes (LEDs), and other optoelectronic devices. This work proposes a crystallization management strategy by adding formamidinium iodide (FAI) to PbI2 precursor in a two-step spin-coating process for FAMACs perovskite solar cells and obtains the best PCE of 22.88%. Nonstoichiometric FAI interacts with PbI2 to form FAI-PbI2 low-dimensional perovskites, which is demonstrated using X-ray diffraction (XRD), UV–vis, and X-ray photoelectron spectroscopy (XPS) measurements. The efficiency and stability of the cells are improved due to the improvement in the perovskite crystal quality and reduced crystal defects.
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