纳米晶
溶剂
钙钛矿(结构)
极地的
表面工程
纳米技术
光催化
材料科学
化学工程
光电效应
乙醇
配体(生物化学)
光化学
化学
催化作用
光电子学
有机化学
受体
天文
工程类
物理
生物化学
作者
Dejian Chen,Kunyuan Xu,Mingwei Yang,J. F. Hu,Renfu Li,Decai Huang,Sisi Liang,Ketai He,Yuan Luo,Shujian Wang,Cong Zhang,Jiaxuan Zhang,Haomiao Zhu
标识
DOI:10.1016/j.cej.2023.144848
摘要
The extremely poor stability of perovskite nanocrystals (NCs) in polar solvent is a critical unsolved problem and seriously hinder their practical application scenarios. Herein, a surface chemistry engineering strategy is proposed for synthesizing robust CsPbX3 (X = Cl, Br, I) NCs in non-toxic ethanol-based solvent by building an extensive inter-ligand H-bond network on perovskite lattice. The obtained unsealed CsPbX3 NCs show unprecedented year-long stability in ethanol. Notably, a water (∼6–50%, v/v) post-treatment can obviously decrease surface defects of NCs, thus yielding a significant enhancement in their emission efficiency (increased from 9.6% to 83.4% for CsPbBr3 NCs in ethanol). We further translated the obtained CsPbBr3 NCs to fluorescent sensor and visible-light-driven photocatalysts, achieving ultra-high sensitivity (limit of detection is 11 nM) and high photocatalytic efficiency (>99% removal within 10 min). Overall, the low-cost, easy-to-process, highly efficient and ethanol/water tolerant perovskites NCs indicate their promising application prospect in multifunctional photoelectric devices.
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