Efficiency and Thermal Stability Enhancements of Sr2SiO4:Eu2+ Phosphor via Bi3+ Codoping for Solid-State White Lighting

被引：13

作者：

Park, Seung Hyok ^{[1
,2
]}

Yoon, Ho Shin ^{[1
]}

Boo, Hye Min ^{[1
]}

Jang, Ho Gyeom ^{[2
]}

Lee, Kyoung Hwa ^{[3
]}

Im, Won Bin ^{[3
]}

机构：

[1] Force4 Corp, Res Inst, Kwangju 500470, South Korea

[2] Korea Univ, Dept Chem, Seoul 136706, South Korea

[3] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

OPTICAL-PROPERTIES; YELLOW PHOSPHOR; GREEN; PHOTOLUMINESCENCE; CA;

D O I：

10.1143/JJAP.51.022602

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bi and Eu-codoped yellow-emitting phosphors of composition Sr1.95-xEu0.05BixSiO4 were prepared, and their emission and thermal quenching characteristics were investigated. The initial PL intensity and thermal quenching behaviors of Sr1.95-xEu0.05BixSiO4 were affected by the Bi-codoping as a coactivator. When 0.01 mol% of Bi was codoped to Sr1.95-xEu0.05BixSiO4, it showed an intense emission peak at 543nm under 450nm excitation. The peak intensity corresponds to a relative intensity of 112% of a commercial Sr2SiO4:Eu2+ phosphor (Force4 Corp.), which may be attributed to energy transfer between Bi3+ and Eu2+. The results suggest that phosphors deriving from Sr1.95-xEu0.05BixSiO4 will be a breakthrough for white light emitting diode (LEDs) and related applications in terms of efficiency enhancement and thermal stability. (C) 2012 The Japan Society of Applied Physics

引用

页数：5

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