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Highly Efficient and Stable Inorganic Perovskite Quantum Dots by Embedding into a Polymer Matrix
Author(s) -
Zhu Jinyang,
Xie Zhifeng,
Sun Xueke,
Zhang Siyuan,
Pan Gencai,
Zhu Yongsheng,
Dong Biao,
Bai Xue,
Zhang Hanzhuang,
Song Hongwei
Publication year - 2019
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201800357
Subject(s) - quantum dot , perovskite (structure) , quantum yield , halide , materials science , photoluminescence , light emitting diode , optoelectronics , luminescence , polymer , ion , diode , chemical engineering , photochemistry , inorganic chemistry , chemistry , composite material , optics , organic chemistry , physics , fluorescence , engineering
All‐inorganic perovskite quantum dots (QDs) with high photoluminescence quantum yield, narrow spectral bandwidth, and broad spectral tunability have broad applications. However, perovskite QDs suffer from poor stability and the fast anion‐exchange reaction between different halide ions. Herein, we embedded green‐light‐emitting CsPbBr 3 QDs and red‐light‐emitting CsPb(Br/I) 3 QDs into carboxyl‐containing polymethyl methacrylate (PMMA) by the hot‐injection method. As a result, the as‐prepared perovskite@PMMA composites not only retain high luminescence but also exhibit good water resistance. Moreover, this treatment prevents anion exchange between different halide QD particles in the solid state. The applications in light‐emitting diodes and cellular labeling agents are also carried out to demonstrate their good stability.