A novel green-emitting Ca15(PO4)2(SiO 4)6:Eu2+ phosphor for applications in n-UV based w-LEDs

Seyoon Hur; Hee Jo Song; Hee Suk Roh; Dong Wan Kim; Kug Sun Hong

doi:10.1016/j.matchemphys.2013.02.009

A novel green-emitting Ca₁₅(PO₄)₂(SiO ₄)₆:Eu²⁺ phosphor for applications in n-UV based w-LEDs

Seyoon Hur
, Hee Jo Song
, Hee Suk Roh
, Dong Wan Kim
, Kug Sun Hong^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A novel green-emitting phosphor Eu²⁺-doped Ca ₁₅(PO₄)₂(SiO₄)₆ with a structure derivative of α′-Ca₂SiO₄ is synthesized by a conventional solid-state reaction method. The photoluminescence properties, the concentration quenching of Eu²⁺ ion, and the thermal stability are investigated. The Ca₁₅(PO₄) ₂(SiO₄)₆:Eu²⁺ phosphor is excited efficiently at a wavelength of 330 nm. At the optimum doping concentration of 0.5 mol% Eu²⁺ ion, the Ca₁₅(PO₄) ₂(SiO₄)₆:Eu²⁺ phosphor has the strongest emission intensity at 491 nm. The main mechanism of concentration quenching is found to be the rapid migration of excitation between the excited Eu²⁺ ions by exchange coupling. The thermal activation energy barrier is confirmed as 0.244 eV. Furthermore, the performance of this phosphor is tested by the fabrication of a phosphor-converted LED (pc-LED) through the integration of an InGaN-based near-ultraviolet light-emitting diode (LED) and driving under from 50 mA to 300 mA. The pc-LED reveals high color rendering index (CRI) value over 50, which is good for applications in w-LED.

Original language	English
Pages (from-to)	350-354
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	139
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2013.02.009
Publication status	Published - 2013 May 15
Externally published	Yes

Bibliographical note

Funding Information:
This work was partly supported by the IT R&D program of MKE/IITA [2009-F-020-01, Development of Red nitride phosphor and self-assembly phosphorescent layer packaging technology for high rendition LED illumination] and the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2009-0094046 ).

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

Keywords

A. Optical materials
B. Heat treatment
C. Photoluminescence spectroscopy
D. Luminescence

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2013.02.009

Cite this

@article{9b335076601c4c87b29da1142460e140,

title = "A novel green-emitting Ca15(PO4)2(SiO 4)6:Eu2+ phosphor for applications in n-UV based w-LEDs",

abstract = "A novel green-emitting phosphor Eu2+-doped Ca 15(PO4)2(SiO4)6 with a structure derivative of α′-Ca2SiO4 is synthesized by a conventional solid-state reaction method. The photoluminescence properties, the concentration quenching of Eu2+ ion, and the thermal stability are investigated. The Ca15(PO4) 2(SiO4)6:Eu2+ phosphor is excited efficiently at a wavelength of 330 nm. At the optimum doping concentration of 0.5 mol\% Eu2+ ion, the Ca15(PO4) 2(SiO4)6:Eu2+ phosphor has the strongest emission intensity at 491 nm. The main mechanism of concentration quenching is found to be the rapid migration of excitation between the excited Eu2+ ions by exchange coupling. The thermal activation energy barrier is confirmed as 0.244 eV. Furthermore, the performance of this phosphor is tested by the fabrication of a phosphor-converted LED (pc-LED) through the integration of an InGaN-based near-ultraviolet light-emitting diode (LED) and driving under from 50 mA to 300 mA. The pc-LED reveals high color rendering index (CRI) value over 50, which is good for applications in w-LED.",

keywords = "A. Optical materials, B. Heat treatment, C. Photoluminescence spectroscopy, D. Luminescence",

author = "Seyoon Hur and Song, \{Hee Jo\} and Roh, \{Hee Suk\} and Kim, \{Dong Wan\} and Hong, \{Kug Sun\}",

note = "Funding Information: This work was partly supported by the IT R\&D program of MKE/IITA [2009-F-020-01, Development of Red nitride phosphor and self-assembly phosphorescent layer packaging technology for high rendition LED illumination] and the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2009-0094046 ). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

month = may,

day = "15",

doi = "10.1016/j.matchemphys.2013.02.009",

language = "English",

volume = "139",

pages = "350--354",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

number = "2-3",

}

TY - JOUR

T1 - A novel green-emitting Ca15(PO4)2(SiO 4)6:Eu2+ phosphor for applications in n-UV based w-LEDs

AU - Hur, Seyoon

AU - Song, Hee Jo

AU - Roh, Hee Suk

AU - Kim, Dong Wan

AU - Hong, Kug Sun

N1 - Funding Information: This work was partly supported by the IT R&D program of MKE/IITA [2009-F-020-01, Development of Red nitride phosphor and self-assembly phosphorescent layer packaging technology for high rendition LED illumination] and the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2009-0094046 ). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/5/15

Y1 - 2013/5/15

N2 - A novel green-emitting phosphor Eu2+-doped Ca 15(PO4)2(SiO4)6 with a structure derivative of α′-Ca2SiO4 is synthesized by a conventional solid-state reaction method. The photoluminescence properties, the concentration quenching of Eu2+ ion, and the thermal stability are investigated. The Ca15(PO4) 2(SiO4)6:Eu2+ phosphor is excited efficiently at a wavelength of 330 nm. At the optimum doping concentration of 0.5 mol% Eu2+ ion, the Ca15(PO4) 2(SiO4)6:Eu2+ phosphor has the strongest emission intensity at 491 nm. The main mechanism of concentration quenching is found to be the rapid migration of excitation between the excited Eu2+ ions by exchange coupling. The thermal activation energy barrier is confirmed as 0.244 eV. Furthermore, the performance of this phosphor is tested by the fabrication of a phosphor-converted LED (pc-LED) through the integration of an InGaN-based near-ultraviolet light-emitting diode (LED) and driving under from 50 mA to 300 mA. The pc-LED reveals high color rendering index (CRI) value over 50, which is good for applications in w-LED.

AB - A novel green-emitting phosphor Eu2+-doped Ca 15(PO4)2(SiO4)6 with a structure derivative of α′-Ca2SiO4 is synthesized by a conventional solid-state reaction method. The photoluminescence properties, the concentration quenching of Eu2+ ion, and the thermal stability are investigated. The Ca15(PO4) 2(SiO4)6:Eu2+ phosphor is excited efficiently at a wavelength of 330 nm. At the optimum doping concentration of 0.5 mol% Eu2+ ion, the Ca15(PO4) 2(SiO4)6:Eu2+ phosphor has the strongest emission intensity at 491 nm. The main mechanism of concentration quenching is found to be the rapid migration of excitation between the excited Eu2+ ions by exchange coupling. The thermal activation energy barrier is confirmed as 0.244 eV. Furthermore, the performance of this phosphor is tested by the fabrication of a phosphor-converted LED (pc-LED) through the integration of an InGaN-based near-ultraviolet light-emitting diode (LED) and driving under from 50 mA to 300 mA. The pc-LED reveals high color rendering index (CRI) value over 50, which is good for applications in w-LED.

KW - A. Optical materials

KW - B. Heat treatment

KW - C. Photoluminescence spectroscopy

KW - D. Luminescence

UR - https://www.scopus.com/pages/publications/84875921651

U2 - 10.1016/j.matchemphys.2013.02.009

DO - 10.1016/j.matchemphys.2013.02.009

M3 - Article

AN - SCOPUS:84875921651

SN - 0254-0584

VL - 139

SP - 350

EP - 354

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -