Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix

Abstract We introduce a low-melting-point (MP) Sn-P-F-O glass ceramic material into the phosphor-in-glass (PIG) material to realize an ‘on-chip’ chip-on-board (COB) type of phosphor-converted (pc) white light-emitting diode (WLED) with green (BaSr)2SiO4:Eu2+ and red (SrCa)AlSiN3:Eu2+ (SCASN) phospho...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hee Chang Yoon, Kouhara Yoshihiro, Heeyeon Yoo, Seung Woo Lee, Ji Hye Oh, Young Rag Do
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/27d4c66626594916a64db4b8e09df72a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:27d4c66626594916a64db4b8e09df72a
record_format	dspace
spelling	oai:doaj.org-article:27d4c66626594916a64db4b8e09df72a2021-12-02T11:40:26ZLow-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix10.1038/s41598-018-25680-62045-2322https://doaj.org/article/27d4c66626594916a64db4b8e09df72a2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25680-6https://doaj.org/toc/2045-2322Abstract We introduce a low-melting-point (MP) Sn-P-F-O glass ceramic material into the phosphor-in-glass (PIG) material to realize an ‘on-chip’ chip-on-board (COB) type of phosphor-converted (pc) white light-emitting diode (WLED) with green (BaSr)2SiO4:Eu2+ and red (SrCa)AlSiN3:Eu2+ (SCASN) phosphors. The optimum Sn-P-F-O-based ceramic components can be sintered into the glass phase with a facile one-step heating process at 285 °C for 1 min. Specifically, these soft-fabrication conditions can be optimized to minimize the degradation of the luminescent properties of the red SCASN phosphor as well as the green silicate phosphor in PIG-based white COB-type pc-LEDs owing to the low thermal loss of the phosphors at low fabrication temperatures below 300 °C. Moreover, the constituents of the COB package, in this case the wire bonding and plastic exterior, can be preserved simultaneously from thermal damage. That is, the low sintering temperature of the glass ceramic encapsulant is a very important factor to realize excellent optical qualities of white COB LEDs. The optical performances of low-MP Sn-P-F-O-based PIG on-chip COB-type pc-WLEDs exhibit low yellowing phenomena, good luminous efficacy of 70.9–86.0 lm/W, excellent color rendering index of 94–97 with correlated color temperatures from 2700 to 10000 K, and good long-term stability.Hee Chang YoonKouhara YoshihiroHeeyeon YooSeung Woo LeeJi Hye OhYoung Rag DoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hee Chang Yoon Kouhara Yoshihiro Heeyeon Yoo Seung Woo Lee Ji Hye Oh Young Rag Do Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
description	Abstract We introduce a low-melting-point (MP) Sn-P-F-O glass ceramic material into the phosphor-in-glass (PIG) material to realize an ‘on-chip’ chip-on-board (COB) type of phosphor-converted (pc) white light-emitting diode (WLED) with green (BaSr)2SiO4:Eu2+ and red (SrCa)AlSiN3:Eu2+ (SCASN) phosphors. The optimum Sn-P-F-O-based ceramic components can be sintered into the glass phase with a facile one-step heating process at 285 °C for 1 min. Specifically, these soft-fabrication conditions can be optimized to minimize the degradation of the luminescent properties of the red SCASN phosphor as well as the green silicate phosphor in PIG-based white COB-type pc-LEDs owing to the low thermal loss of the phosphors at low fabrication temperatures below 300 °C. Moreover, the constituents of the COB package, in this case the wire bonding and plastic exterior, can be preserved simultaneously from thermal damage. That is, the low sintering temperature of the glass ceramic encapsulant is a very important factor to realize excellent optical qualities of white COB LEDs. The optical performances of low-MP Sn-P-F-O-based PIG on-chip COB-type pc-WLEDs exhibit low yellowing phenomena, good luminous efficacy of 70.9–86.0 lm/W, excellent color rendering index of 94–97 with correlated color temperatures from 2700 to 10000 K, and good long-term stability.
format	article
author	Hee Chang Yoon Kouhara Yoshihiro Heeyeon Yoo Seung Woo Lee Ji Hye Oh Young Rag Do
author_facet	Hee Chang Yoon Kouhara Yoshihiro Heeyeon Yoo Seung Woo Lee Ji Hye Oh Young Rag Do
author_sort	Hee Chang Yoon
title	Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
title_short	Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
title_full	Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
title_fullStr	Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
title_full_unstemmed	Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix
title_sort	low-yellowing phosphor-in-glass for high-power chip-on-board white leds by optimizing a low-melting sn-p-f-o glass matrix
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/27d4c66626594916a64db4b8e09df72a
work_keys_str_mv	AT heechangyoon lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix AT kouharayoshihiro lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix AT heeyeonyoo lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix AT seungwoolee lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix AT jihyeoh lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix AT youngragdo lowyellowingphosphoringlassforhighpowerchiponboardwhiteledsbyoptimizingalowmeltingsnpfoglassmatrix
_version_	1718395630964965376

Low-Yellowing Phosphor-in-Glass for High-Power Chip-on-board White LEDs by Optimizing a Low-Melting Sn-P-F-O Glass Matrix

Ejemplares similares