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Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes

In this study, the CuInS(2)/ZnS core/shell quantum dots (QDs) were prepared via simple and environmentally friendly solvothermal synthesis and were used as phosphors for white light-emitting diodes (WLEDs). The surface defect of the CuInS(2) core QDs were passivated by the ZnS shell by forming CuInS...

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Autores principales: Li, Huimin, Jiang, Xiaohong, Wang, Anzhen, Chu, Xiaotian, Du, Zuliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7477729/
https://www.ncbi.nlm.nih.gov/pubmed/33195004
http://dx.doi.org/10.3389/fchem.2020.00669
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author Li, Huimin
Jiang, Xiaohong
Wang, Anzhen
Chu, Xiaotian
Du, Zuliang
author_facet Li, Huimin
Jiang, Xiaohong
Wang, Anzhen
Chu, Xiaotian
Du, Zuliang
author_sort Li, Huimin
collection PubMed
description In this study, the CuInS(2)/ZnS core/shell quantum dots (QDs) were prepared via simple and environmentally friendly solvothermal synthesis and were used as phosphors for white light-emitting diodes (WLEDs). The surface defect of the CuInS(2) core QDs were passivated by the ZnS shell by forming CuInS(2)/ZnS core/shell QDs. By adjusting the Cu/In ratio and the nucleation temperature, the photoluminescence (PL) peak of the CuInS(2) QDs was tunable in a range of 651–775 nm. After coating the ZnS layer and modifying oleic acid ligands, the PL quantum yield increased to 85.06%. The CuInS(2)/ZnS QD powder thermal stability results showed that the PL intensity of the QDs remained 91% at 100°C for 10 min. High color rendering index values (CRI, 90) and correlated color temperature of 4360 K for the efficient WLEDs were fabricated using CuInS(2)/ZnS QDs and (Ba,Sr)(2)SiO(4):Eu(2+) as color converters in combination with a blue GaN light-emitting diode chip.
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spelling pubmed-74777292020-11-12 Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes Li, Huimin Jiang, Xiaohong Wang, Anzhen Chu, Xiaotian Du, Zuliang Front Chem Chemistry In this study, the CuInS(2)/ZnS core/shell quantum dots (QDs) were prepared via simple and environmentally friendly solvothermal synthesis and were used as phosphors for white light-emitting diodes (WLEDs). The surface defect of the CuInS(2) core QDs were passivated by the ZnS shell by forming CuInS(2)/ZnS core/shell QDs. By adjusting the Cu/In ratio and the nucleation temperature, the photoluminescence (PL) peak of the CuInS(2) QDs was tunable in a range of 651–775 nm. After coating the ZnS layer and modifying oleic acid ligands, the PL quantum yield increased to 85.06%. The CuInS(2)/ZnS QD powder thermal stability results showed that the PL intensity of the QDs remained 91% at 100°C for 10 min. High color rendering index values (CRI, 90) and correlated color temperature of 4360 K for the efficient WLEDs were fabricated using CuInS(2)/ZnS QDs and (Ba,Sr)(2)SiO(4):Eu(2+) as color converters in combination with a blue GaN light-emitting diode chip. Frontiers Media S.A. 2020-08-25 /pmc/articles/PMC7477729/ /pubmed/33195004 http://dx.doi.org/10.3389/fchem.2020.00669 Text en Copyright © 2020 Li, Jiang, Wang, Chu and Du. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Li, Huimin
Jiang, Xiaohong
Wang, Anzhen
Chu, Xiaotian
Du, Zuliang
Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title_full Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title_fullStr Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title_full_unstemmed Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title_short Simple Synthesis of CuInS(2)/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes
title_sort simple synthesis of cuins(2)/zns core/shell quantum dots for white light-emitting diodes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7477729/
https://www.ncbi.nlm.nih.gov/pubmed/33195004
http://dx.doi.org/10.3389/fchem.2020.00669
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