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Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition

Phosphor-converted white LEDs rely on combining a blue-emitting InGaN chip with yellow and red-emitting luminescent materials. The discovery of cyan-emitting (470–500 nm) phosphors is a challenge to compensate for the spectral gap and produce full-spectrum white light. Na(0.5)K(0.5)Li(3)SiO(4):Eu(2+...

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Autores principales: Zhao, Ming, Liao, Hongxu, Molokeev, Maxim S., Zhou, Yayun, Zhang, Qinyuan, Liu, Quanlin, Xia, Zhiguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456736/
https://www.ncbi.nlm.nih.gov/pubmed/30992988
http://dx.doi.org/10.1038/s41377-019-0148-8
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author Zhao, Ming
Liao, Hongxu
Molokeev, Maxim S.
Zhou, Yayun
Zhang, Qinyuan
Liu, Quanlin
Xia, Zhiguo
author_facet Zhao, Ming
Liao, Hongxu
Molokeev, Maxim S.
Zhou, Yayun
Zhang, Qinyuan
Liu, Quanlin
Xia, Zhiguo
author_sort Zhao, Ming
collection PubMed
description Phosphor-converted white LEDs rely on combining a blue-emitting InGaN chip with yellow and red-emitting luminescent materials. The discovery of cyan-emitting (470–500 nm) phosphors is a challenge to compensate for the spectral gap and produce full-spectrum white light. Na(0.5)K(0.5)Li(3)SiO(4):Eu(2+) (NKLSO:Eu(2+)) phosphor was developed with impressive properties, providing cyan emission at 486 nm with a narrow full width at half maximum (FWHM) of only 20.7 nm, and good thermal stability with an integrated emission loss of only 7% at 150 °C. The ultra-narrow-band cyan emission results from the high-symmetry cation sites, leading to almost ideal cubic coordination for UCr(4)C(4)-type compounds. NKLSO:Eu(2+) phosphor allows the valley between the blue and yellow emission peaks in the white LED device to be filled, and the color-rendering index can be enhanced from 86 to 95.2, suggesting great applications in full-spectrum white LEDs.
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spelling pubmed-64567362019-04-16 Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition Zhao, Ming Liao, Hongxu Molokeev, Maxim S. Zhou, Yayun Zhang, Qinyuan Liu, Quanlin Xia, Zhiguo Light Sci Appl Article Phosphor-converted white LEDs rely on combining a blue-emitting InGaN chip with yellow and red-emitting luminescent materials. The discovery of cyan-emitting (470–500 nm) phosphors is a challenge to compensate for the spectral gap and produce full-spectrum white light. Na(0.5)K(0.5)Li(3)SiO(4):Eu(2+) (NKLSO:Eu(2+)) phosphor was developed with impressive properties, providing cyan emission at 486 nm with a narrow full width at half maximum (FWHM) of only 20.7 nm, and good thermal stability with an integrated emission loss of only 7% at 150 °C. The ultra-narrow-band cyan emission results from the high-symmetry cation sites, leading to almost ideal cubic coordination for UCr(4)C(4)-type compounds. NKLSO:Eu(2+) phosphor allows the valley between the blue and yellow emission peaks in the white LED device to be filled, and the color-rendering index can be enhanced from 86 to 95.2, suggesting great applications in full-spectrum white LEDs. Nature Publishing Group UK 2019-04-10 /pmc/articles/PMC6456736/ /pubmed/30992988 http://dx.doi.org/10.1038/s41377-019-0148-8 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhao, Ming
Liao, Hongxu
Molokeev, Maxim S.
Zhou, Yayun
Zhang, Qinyuan
Liu, Quanlin
Xia, Zhiguo
Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title_full Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title_fullStr Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title_full_unstemmed Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title_short Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition
title_sort emerging ultra-narrow-band cyan-emitting phosphor for white leds with enhanced color rendition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456736/
https://www.ncbi.nlm.nih.gov/pubmed/30992988
http://dx.doi.org/10.1038/s41377-019-0148-8
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