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Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering

[Image: see text] Metal halide perovskites exhibit small exciton binding energy, which leads to a low electron–hole capture rate for radiative recombination and accordingly decreases the luminescence efficiency. Reducing the thickness of the perovskite film or the size of the perovskite crystal is f...

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Autores principales: Wang, Wenkang, Wu, Yuanchuang, Wang, Duofa, Zhang, Tianjin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6881822/
https://www.ncbi.nlm.nih.gov/pubmed/31788594
http://dx.doi.org/10.1021/acsomega.9b02248
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author Wang, Wenkang
Wu, Yuanchuang
Wang, Duofa
Zhang, Tianjin
author_facet Wang, Wenkang
Wu, Yuanchuang
Wang, Duofa
Zhang, Tianjin
author_sort Wang, Wenkang
collection PubMed
description [Image: see text] Metal halide perovskites exhibit small exciton binding energy, which leads to a low electron–hole capture rate for radiative recombination and accordingly decreases the luminescence efficiency. Reducing the thickness of the perovskite film or the size of the perovskite crystal is found to be an effective method to spatially confine the electrons and holes to promote the bimolecular radiative recombination. Here, we fabricate CsPbBr(3)/Cs(4)PbBr(6) nanocomposites, applicable for light emission diodes, by a simple self-assembly method. We effectively reduce the critical size of the CsPbBr(3) nanocrystals in the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites by adding a certain amount of dimethyl sulfoxide into the perovskite precursor solution. Accordingly, the photoluminescence quantum yield of the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites increased from 56 to 91% due to the quantum size effect. In situ observation of the growth of CsPbBr(3)/Cs(4)PbBr(6) nanocomposites reveals that the reduction of the CsPbBr(3) crystal size is due to the change of the chemical reaction speed during the two-step growth process of the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites.
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spelling pubmed-68818222019-11-29 Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering Wang, Wenkang Wu, Yuanchuang Wang, Duofa Zhang, Tianjin ACS Omega [Image: see text] Metal halide perovskites exhibit small exciton binding energy, which leads to a low electron–hole capture rate for radiative recombination and accordingly decreases the luminescence efficiency. Reducing the thickness of the perovskite film or the size of the perovskite crystal is found to be an effective method to spatially confine the electrons and holes to promote the bimolecular radiative recombination. Here, we fabricate CsPbBr(3)/Cs(4)PbBr(6) nanocomposites, applicable for light emission diodes, by a simple self-assembly method. We effectively reduce the critical size of the CsPbBr(3) nanocrystals in the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites by adding a certain amount of dimethyl sulfoxide into the perovskite precursor solution. Accordingly, the photoluminescence quantum yield of the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites increased from 56 to 91% due to the quantum size effect. In situ observation of the growth of CsPbBr(3)/Cs(4)PbBr(6) nanocomposites reveals that the reduction of the CsPbBr(3) crystal size is due to the change of the chemical reaction speed during the two-step growth process of the CsPbBr(3)/Cs(4)PbBr(6) nanocomposites. American Chemical Society 2019-11-13 /pmc/articles/PMC6881822/ /pubmed/31788594 http://dx.doi.org/10.1021/acsomega.9b02248 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Wang, Wenkang
Wu, Yuanchuang
Wang, Duofa
Zhang, Tianjin
Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title_full Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title_fullStr Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title_full_unstemmed Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title_short Effective Control of the Growth and Photoluminescence Properties of CsPbBr(3)/Cs(4)PbBr(6) Nanocomposites by Solvent Engineering
title_sort effective control of the growth and photoluminescence properties of cspbbr(3)/cs(4)pbbr(6) nanocomposites by solvent engineering
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6881822/
https://www.ncbi.nlm.nih.gov/pubmed/31788594
http://dx.doi.org/10.1021/acsomega.9b02248
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