Efficiency and thermal stability enhancements of Sr 2SiO 4:Eu 2+ phosphor via Bi 3+ codoping for solid-state white lighting

Seung Hyok Park; Ho Shin Yoon; Hye Min Boo; Ho Gyeom Jang; Kyoung Hwa Lee; Won Bin Im

doi:10.1143/JJAP.51.022602

Efficiency and thermal stability enhancements of Sr ₂SiO ₄:Eu ²⁺ phosphor via Bi ³⁺ codoping for solid-state white lighting

Seung Hyok Park, Ho Shin Yoon, Hye Min Boo, Ho Gyeom Jang, Kyoung Hwa Lee, Won Bin Im

College of Science

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

14 Citations (Scopus)

Abstract

Bi and Eu-codoped yellow-emitting phosphors of composition Sr _1.95-xEu _0.05Bi _xSiO ₄ were prepared, and their emission and thermal quenching characteristics were investigated. The initial PL intensity and thermal quenching behaviors of Sr _1.95-xEu _0.05Bi _xSiO ₄ were affected by the Bicodoping as a coactivator. When 0.01 mol% of Bi was codoped to Sr _1.95-xEu _0.05Bi _xSiO ₄, it showed an intense emission peak at 543nm under 450nm excitation. The peak intensity corresponds to a relative intensity of 112% of a commercial Sr ₂SiO ₄:Eu ²⁺ phosphor (Force4 Corp.), which may be attributed to energy transfer between Bi ³⁺ and Eu ²⁺. The results suggest that phosphors deriving from Sr _1.95-xEu _0.05Bi _xSiO ₄ will be a breakthrough for white light emitting diode (LEDs) and related applications in terms of efficiency enhancement and thermal stability.

Original language	English
Article number	022602
Journal	Japanese journal of applied physics
Volume	51
Issue number	2 PART 1
DOIs	https://doi.org/10.1143/JJAP.51.022602
Publication status	Published - 2012 Feb

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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title = "Efficiency and thermal stability enhancements of Sr 2SiO 4:Eu 2+ phosphor via Bi 3+ codoping for solid-state white lighting",

abstract = "Bi and Eu-codoped yellow-emitting phosphors of composition Sr 1.95-xEu 0.05Bi xSiO 4 were prepared, and their emission and thermal quenching characteristics were investigated. The initial PL intensity and thermal quenching behaviors of Sr 1.95-xEu 0.05Bi xSiO 4 were affected by the Bicodoping as a coactivator. When 0.01 mol% of Bi was codoped to Sr 1.95-xEu 0.05Bi xSiO 4, it showed an intense emission peak at 543nm under 450nm excitation. The peak intensity corresponds to a relative intensity of 112% of a commercial Sr 2SiO 4:Eu 2+ phosphor (Force4 Corp.), which may be attributed to energy transfer between Bi 3+ and Eu 2+. The results suggest that phosphors deriving from Sr 1.95-xEu 0.05Bi xSiO 4 will be a breakthrough for white light emitting diode (LEDs) and related applications in terms of efficiency enhancement and thermal stability.",

author = "Park, {Seung Hyok} and Yoon, {Ho Shin} and Boo, {Hye Min} and Jang, {Ho Gyeom} and Lee, {Kyoung Hwa} and Im, {Won Bin}",

year = "2012",

month = feb,

doi = "10.1143/JJAP.51.022602",

language = "English",

volume = "51",

journal = "Japanese journal of applied physics",

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publisher = "Japan Society of Applied Physics",

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T1 - Efficiency and thermal stability enhancements of Sr 2SiO 4:Eu 2+ phosphor via Bi 3+ codoping for solid-state white lighting

AU - Park, Seung Hyok

AU - Yoon, Ho Shin

AU - Boo, Hye Min

AU - Jang, Ho Gyeom

AU - Lee, Kyoung Hwa

AU - Im, Won Bin

PY - 2012/2

Y1 - 2012/2

N2 - Bi and Eu-codoped yellow-emitting phosphors of composition Sr 1.95-xEu 0.05Bi xSiO 4 were prepared, and their emission and thermal quenching characteristics were investigated. The initial PL intensity and thermal quenching behaviors of Sr 1.95-xEu 0.05Bi xSiO 4 were affected by the Bicodoping as a coactivator. When 0.01 mol% of Bi was codoped to Sr 1.95-xEu 0.05Bi xSiO 4, it showed an intense emission peak at 543nm under 450nm excitation. The peak intensity corresponds to a relative intensity of 112% of a commercial Sr 2SiO 4:Eu 2+ phosphor (Force4 Corp.), which may be attributed to energy transfer between Bi 3+ and Eu 2+. The results suggest that phosphors deriving from Sr 1.95-xEu 0.05Bi xSiO 4 will be a breakthrough for white light emitting diode (LEDs) and related applications in terms of efficiency enhancement and thermal stability.

AB - Bi and Eu-codoped yellow-emitting phosphors of composition Sr 1.95-xEu 0.05Bi xSiO 4 were prepared, and their emission and thermal quenching characteristics were investigated. The initial PL intensity and thermal quenching behaviors of Sr 1.95-xEu 0.05Bi xSiO 4 were affected by the Bicodoping as a coactivator. When 0.01 mol% of Bi was codoped to Sr 1.95-xEu 0.05Bi xSiO 4, it showed an intense emission peak at 543nm under 450nm excitation. The peak intensity corresponds to a relative intensity of 112% of a commercial Sr 2SiO 4:Eu 2+ phosphor (Force4 Corp.), which may be attributed to energy transfer between Bi 3+ and Eu 2+. The results suggest that phosphors deriving from Sr 1.95-xEu 0.05Bi xSiO 4 will be a breakthrough for white light emitting diode (LEDs) and related applications in terms of efficiency enhancement and thermal stability.

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JO - Japanese journal of applied physics

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ER -

Efficiency and thermal stability enhancements of Sr ₂SiO ₄:Eu ²⁺ phosphor via Bi ³⁺ codoping for solid-state white lighting

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