钝化
量子点
材料科学
纳米技术
钙钛矿(结构)
光致发光
离子键合
卤化物
纳米颗粒
量子产额
光电探测器
纳米晶
发光二极管
光电子学
化学工程
荧光
无机化学
化学
离子
光学
图层(电子)
工程类
物理
有机化学
作者
Wentao Song,Dandan Wang,Jianwu Tian,Guobin Qi,Min Wu,Shitai Liu,Tongtong Wang,Bing Wang,Yingfang Yao,Zhigang Zou,Bin Liu
出处
期刊:Small
[Wiley]
日期:2022-09-14
卷期号:18 (42)
被引量:21
标识
DOI:10.1002/smll.202204763
摘要
Abstract Due to their marvelous electrical and optical properties, perovskite nanocrystals have reached remarkable landmarks in solar cells, light‐emitting diodes, and photodetectors. However, the intrinsic instability of ionic perovskites, which would undergo an undesirable phase transition and decompose rapidly in ambient humidity, limits their long‐term practical deployment. To address this challenge, halogenated trimethoxysilane as the passivation additive is chosen, which utilizes simultaneous halide and silica passivation to enhance the stability of perovskite nanoparticles via a dual‐passivation mechanism. The processable nanoparticles show high photoluminescence quantum yield, tunable fluorescence wavelength, and excellent resistance against air and water, highlighting great potential as green to deep‐red bio‐labels after further phospholipid encapsulation. This work demonstrates that the dual‐passivation mechanism could be used to maintain the long‐term stability of ionic crystals, which sheds light on the opportunity of halide perovskite nanoparticles for usage in a humid environment.
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