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Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs

Colloidal quantum dots (QDs) are a promising luminescent material for the development of next generation hybrid light-emitting diodes (QDLEDs). In particular, QDs are of great interest in terms of the development of solid-state light sources with an emission spectrum that mimics daylight. In this st...

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Autores principales: Zvaigzne, Mariya, Domanina, Irina, Il’gach, Dmitriy, Yakimansky, Alexander, Nabiev, Igor, Samokhvalov, Pavel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7764205/
https://www.ncbi.nlm.nih.gov/pubmed/33322281
http://dx.doi.org/10.3390/nano10122487
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author Zvaigzne, Mariya
Domanina, Irina
Il’gach, Dmitriy
Yakimansky, Alexander
Nabiev, Igor
Samokhvalov, Pavel
author_facet Zvaigzne, Mariya
Domanina, Irina
Il’gach, Dmitriy
Yakimansky, Alexander
Nabiev, Igor
Samokhvalov, Pavel
author_sort Zvaigzne, Mariya
collection PubMed
description Colloidal quantum dots (QDs) are a promising luminescent material for the development of next generation hybrid light-emitting diodes (QDLEDs). In particular, QDs are of great interest in terms of the development of solid-state light sources with an emission spectrum that mimics daylight. In this study, we used CdSe(core)/ZnS/CdS/ZnS(shell) QDs with organic ligands mimicking polyfluorene and its modified derivatives to obtain QD–polymer composites emitting white light. We found that the emission of the composites obtained by spin-coating, being strongly dependent on the chemical structure of the polymer matrix and the QD-to-polymer mass ratio, can be accurately controlled and adjusted to bring its emission spectrum close to the spectrum of daylight (CIE coordinates: 1931 0.307; 0.376). Moreover, the light emission of these composites has been found to be temporally stable, which is due to the minimal structural instability and volume-uniform charge and energy transfer properties. Thus, the use of the synthesized polyfluorene-based organic ligands with controllable chemical structures adaptable to the structure of the polymer matrix can significantly increase the stability of white light emission from QD composites, which can be considered promising electroluminescent materials for fabrication of white QDLEDs.
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spelling pubmed-77642052020-12-27 Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs Zvaigzne, Mariya Domanina, Irina Il’gach, Dmitriy Yakimansky, Alexander Nabiev, Igor Samokhvalov, Pavel Nanomaterials (Basel) Article Colloidal quantum dots (QDs) are a promising luminescent material for the development of next generation hybrid light-emitting diodes (QDLEDs). In particular, QDs are of great interest in terms of the development of solid-state light sources with an emission spectrum that mimics daylight. In this study, we used CdSe(core)/ZnS/CdS/ZnS(shell) QDs with organic ligands mimicking polyfluorene and its modified derivatives to obtain QD–polymer composites emitting white light. We found that the emission of the composites obtained by spin-coating, being strongly dependent on the chemical structure of the polymer matrix and the QD-to-polymer mass ratio, can be accurately controlled and adjusted to bring its emission spectrum close to the spectrum of daylight (CIE coordinates: 1931 0.307; 0.376). Moreover, the light emission of these composites has been found to be temporally stable, which is due to the minimal structural instability and volume-uniform charge and energy transfer properties. Thus, the use of the synthesized polyfluorene-based organic ligands with controllable chemical structures adaptable to the structure of the polymer matrix can significantly increase the stability of white light emission from QD composites, which can be considered promising electroluminescent materials for fabrication of white QDLEDs. MDPI 2020-12-11 /pmc/articles/PMC7764205/ /pubmed/33322281 http://dx.doi.org/10.3390/nano10122487 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zvaigzne, Mariya
Domanina, Irina
Il’gach, Dmitriy
Yakimansky, Alexander
Nabiev, Igor
Samokhvalov, Pavel
Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title_full Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title_fullStr Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title_full_unstemmed Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title_short Quantum Dot–Polyfluorene Composites for White-Light-Emitting Quantum Dot-Based LEDs
title_sort quantum dot–polyfluorene composites for white-light-emitting quantum dot-based leds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7764205/
https://www.ncbi.nlm.nih.gov/pubmed/33322281
http://dx.doi.org/10.3390/nano10122487
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