In situ growth strategy to construct perovskite quantum dot@covalent organic framework composites with enhanced water stability

In situ growth strategy to construct perovskite quantum dot@covalent organic framework composites with enhanced water stability

Metal halide perovskite quantum dots (QDs) have excellent optoelectronic properties; however, their poor stability under water or thermal conditions remains an obstacle to commercialization. Here, we used a carboxyl functional group (-COOH) to enhance the ability of a covalent organic framework (COF...

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Veröffentlicht in:Nanotechnology 2023-06, Vol.34 (24), p.245601
Hauptverfasser: Zhang, Hongyan, He, Xiaoxiong, Wang, Hao, Chen, Liangjun, Xu, Gaopeng, Zhang, Nan, Qu, Kang, He, Qingquan, Peng, Yongwu, Pan, Jun
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composite
covalent organic framework
growth
perovskite quantum dots
stability
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container_end_page
container_issue 24
container_start_page 245601
container_title Nanotechnology
container_volume 34
creator Zhang, Hongyan
He, Xiaoxiong
Wang, Hao
Chen, Liangjun
Xu, Gaopeng
Zhang, Nan
Qu, Kang
He, Qingquan
Peng, Yongwu
Pan, Jun
description Metal halide perovskite quantum dots (QDs) have excellent optoelectronic properties; however, their poor stability under water or thermal conditions remains an obstacle to commercialization. Here, we used a carboxyl functional group (-COOH) to enhance the ability of a covalent organic framework (COF) to adsorb lead ions and grow CH NH PbBr (MAPbBr ) QDs into a mesoporous carboxyl-functionalized COF to construct MAPbBr QDs@COF core-shell-like composites to improve the stability of perovskites. Owing to the protection of the COF, the as-prepared composites exhibited enhanced water stability, and the characteristic fluorescence was maintained for more than 15 d. These MAPbBr QDs@COF composites can be used to fabricate white light-emitting diodes with a color comparable to natural white emission. This work demonstrates the importance of functional groups for the growth of perovskite QDs, and coating with a porous structure is an effective way to improve the stability of metal halide perovskites.
doi_str_mv 10.1088/1361-6528/acc1ec
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subjects composite
covalent organic framework
growth
perovskite quantum dots
stability
title In situ growth strategy to construct perovskite quantum dot@covalent organic framework composites with enhanced water stability
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