钝化
甲脒
材料科学
苯并三唑
X射线光电子能谱
钙钛矿(结构)
光致发光
能量转换效率
光电子学
钙钛矿太阳能电池
太阳能电池
分析化学(期刊)
图层(电子)
化学
化学工程
纳米技术
结晶学
工程类
冶金
色谱法
作者
Alessandro Caiazzo,Arthur Maufort,Bas T. van Gorkom,Willemijn H. M. Remmerswaal,Jordi Ferrer Orri,Junyu Li,Junke Wang,Wouter Van Gompel,Kristof Van Hecke,Gunnar Kusch,Rachel A. Oliver,Caterina Ducati,Laurence Lutsen,Martijn M. Wienk,Samuel D. Stranks,Dirk Vanderzande,Raj René Janssen
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-03-27
卷期号:6 (7): 3933-3943
标识
DOI:10.1021/acsaem.3c00101
摘要
2H-Benzotriazol-2-ylethylammonium bromide and iodide and its difluorinated derivatives are synthesized and employed as interlayers for passivation of formamidinium lead triiodide (FAPbI3) solar cells. In combination with PbI2 and PbBr2, these benzotriazole derivatives form two-dimensional (2D) Ruddlesden-Popper perovskites (RPPs) as evidenced by their crystal structures and thin film characteristics. When used to passivate n-i-p FAPbI3 solar cells, the power conversion efficiency improves from 20% to close to 22% by enhancing the open-circuit voltage. Quasi-Fermi level splitting experiments and scanning electron microscopy cathodoluminescence hyperspectral imaging reveal that passivation provides a reduced nonradiative recombination at the interface between the perovskite and hole transport layer. Photoluminescence spectroscopy, angle-resolved grazing-incidence wide-angle X-ray scattering, and depth profiling X-ray photoelectron spectroscopy studies of the 2D/three-dimensional (3D) interface between the benzotriazole RPP and FAPbI3 show that a nonuniform layer of 2D perovskites is enough to passivate defects, enhance charge extraction, and decrease nonradiative recombination.
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