溶剂化
化学
二甲基乙酰胺
结晶
溶解度
钙钛矿(结构)
溶解
色散(光学)
卤化物
化学工程
二甲基甲酰胺
溶剂
材料科学
无机化学
有机化学
工程类
物理
光学
作者
Xiwei Huang,Fei Cao,Shaoqi Zhan,Qifan Feng,Minghua Zhu,Zhenhuang Su,Xingyu Gao,Jun Yin,Jing Li,Nanfeng Zheng,Binghui Wu
出处
期刊:Joule
[Elsevier]
日期:2023-07-01
卷期号:7 (7): 1556-1573
被引量:7
标识
DOI:10.1016/j.joule.2023.05.020
摘要
Summary
The solvation capacity of dispersion solvents plays a crucial role in the solution processing of metal halide perovskites. For instance, N,N-dimethylformamide (DMF), a widely used dispersion solvent, possesses high solvation capacity but often generates suboptimal film quality due to slow crystallization kinetics. We propose using low-solvation binary cosolvents (nitrile- and ether-type solvents) to achieve a balance between solvation (i.e., sufficient solubility of precursors) and desolvation (i.e., rapid crystallization of films) processes during perovskite synthesis. The polarity and hydrogen-bonding property of these cosolvents synergistically enhance their solvation capacity, facilitating perovskite precursor dissolution. Moreover, the low-solvation cosolvents accelerate the crystallization of well-defined intermediate films, yielding higher-quality perovskites than those synthesized with DMF. The optimized modules achieved an active-area efficiency of 22.27%, with a certified aperture-area efficiency of 16.10% and corresponding active-area efficiency of 20.75%. This research on solvation regulation provides universal guidelines for innovatively preparing high-quality halide perovskites.
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