钙钛矿(结构)
材料科学
卤化物
化学工程
微晶
光电子学
化学计量学
光伏系统
能量转换效率
纳米技术
太阳能电池
无机化学
化学
有机化学
生态学
冶金
工程类
生物
作者
Huanping Zhou,Yu Zhang,Zijian Huang,Zhenyu Guo,Cheng Zhu,Jingying He,Qi Chen,Wentao Sun
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-05-10
卷期号:15 (5): 8350-8362
被引量:20
标识
DOI:10.1021/acsnano.0c09822
摘要
2D/3D hybrid perovskites have shown great environmental stability for use as solar cells. Yet insulating organic cation spacers affect the formation of vertically oriented crystalline grains to hamper carrier transport. To date, the selection of cation spacers is limited because crystal growth kinetics should be strictly obeyed. Here, we adopted a mobile-media-assisted method to fabricate highly oriented 2D/3D hybrid perovskite films, wherein bulky molecules of (C(CH3)3NH3, TBA) are used as cation spacers. We found the compositional volatile salt promote the orientation of perovskite polycrystalline films with various compositions universally. And we obtained efficient solar cells with a photoelectric conversion efficiency (PCE) of 17.38% and a certified PCE of 19.30% based on 2D/3D hybrid perovskites an overall stoichiometry matching n = 10 and 20, respectively, which are one of the highest efficiencies among all 2D/3D hybrid perovskite based solar cells so far. These findings largely broaden the selection category of bulky cations and promote further exploration of more functional organic cations.
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