钙钛矿(结构)
结晶
卤化物
成核
二甲基乙酰胺
材料科学
化学工程
异质结
能量转换效率
沉积(地质)
降水
薄膜
相(物质)
图层(电子)
二甲基甲酰胺
溶剂
无机化学
化学
纳米技术
有机化学
光电子学
物理
地质学
工程类
古生物学
沉积物
气象学
作者
Dinghan Shen,Xiao Yu,Xin Cai,Ming Peng,Yingzhuang Ma,Xin Su,Lixin Xiao,Dechun Zou
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2014-10-30
卷期号:2 (48): 20454-20461
被引量:155
摘要
N,N-Dimethylformamide (DMF) has been shown to be an efficient precursor solvent for the one-step deposition of perovskite thin films in photovoltaic applications. Here, the specific advantage DMF introduces during the perovskite crystallization process is elucidated through comparison with dimethylacetamide (DMAc), one of its homologues. The unique presence of a DMF-induced intermediate phase was verified for the first time and its positive functions to inhibit uncontrolled perovskite precipitation and facilitate homogeneous nucleation were demonstrated. When combined with a double blocking layer structure to prevent shunting, our planar heterojunction (PHJ) perovskite solar cells achieved a high power conversion efficiency of up to 13.8%. Our results uncover the origin of the widespread adoption of DMF in perovskite thin film deposition, and represent a helpful step towards judicious perovskite morphological control.
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