Ce3+→Eu2+ energy transfer studies on BaMgSiO4 -: A green phosphor for three band white LEDs

被引：39

作者：

Sivakumar, V. ^{[1
]}

Varadaraju, U. V.

机构：

[1] Indian Inst Technol, Ctr Mat Sci, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol, Dept Chem, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2007年 / 154卷 / 05期

关键词：

D O I：

10.1149/1.2714303

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Ce3+ luminescence is studied for the first time in BaMgSiO4. Intense and broad blue emission is observed with maximum at 430 nm when excited with 356 nm. Studies on Ba1-2yCeyLiyMgSiO4 (y=0.0025-0.125) show that the emission intensity is maximum for y=0.1 and a decrease in emission intensity is observed for higher y values. The concentration of Eu2+ and Ce3+ are varied in BaMgSiO4:0.1Ce(3+), Eu2+, and BaMgSiO4:0.01Eu(2+), Ce3+ systems, respectively, in order to find the critical concentration of Eu2+ and Ce3+ to achieve high emission intensity of Eu2+. Ba0.75Eu0.05Ce0.1Li0.1MgSiO4 and Ba0.97Eu0.01Ce0.01Li0.01MgSiO4 compositions show maximum Eu2+ emission, and the emission intensity is found to be comparable with that of commercial ZnS:Cu,Al (green phosphor, SONY) under near-UV excitation (400 nm). Commission Internationale de I'Eclairage (CIE) chromaticity coordinates indicate that the Eu2+ and Ce3+ substituted compositions are potential green phosphors for solid-state lighting, light-emitting diode technology. (c) 2007 The Electrochemical Society.

引用

页码：J167 / J171

页数：5

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