Eu2+-activated silicon-oxynitride Ca3Si2O4N2: a green-emitting phosphor for white LEDs

被引：114

作者：

Chiu, Yi-Chen ^{[1
]}

Huang, Chien-Hao ^{[2
,3
]}

Lee, Te-Ju ^{[2
,3
]}

Liu, Wei-Ren ^{[1
]}

Yeh, Yao-Tsung ^{[1
]}

Jang, Shyue-Ming ^{[1
]}

Liu, Ru-Shi ^{[4
]}

机构：

[1] ITRI, Mat & Chem Res Labs, Hsinchu 300, Taiwan

[2] Natl Chiao Tung Univ, Phosphors Res Lab, Hsinchu 300, Taiwan

[3] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan

[4] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 10期

关键词：

LUMINESCENCE PROPERTIES; ENERGY-TRANSFER; CA; SR; CAALSIN3-EU2+; DIODE; BA;

D O I：

10.1364/OE.19.00A331

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The green-emitting phosphor Ca3Si2O4N2:Eu2+ was synthesized using a solid-state reaction. The luminescence properties, diffuse reflection spectrum, and thermal quenching were firstly studied, and a white light-emitting diode (wLED) was fabricated using the Eu2+-activated Ca3Si2O4N2 phosphor. Eu2+-doped Ca3Si2O4N2 exhibited a broad green emission band centered between 510 and 550 nm depending on the concentration of Eu2+. The optimal doping concentration of Eu2+ in Ca3Si2O4N2 was 1 mol%. The energy transfer between Eu2+ ions proceeds by an electric multipolar interaction mechanism, with a critical transfer distance of approximately 30.08 angstrom. A wLED with an color-rendering index R-a of 88.25 at a correlated color temperature of 6029 K was obtained by combining a GaN-based n-UV LED (380 nm) with the blue-emitting BaMgAl10O17:Eu2+, green-emitting Ca3Si2O4N2: Eu2+, and red-emitting CaAlSiN3:Eu2+ phosphors. The results present Ca3Si2O4N2:Eu2+ as an attractive candidate for use as a conversion phosphor for wLED applications. (C) 2011 Optical Society of America

引用

页码：A331 / A339

页数：9

共 30 条

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