Enhancement of fluorescence by Ce3+ doping in green-emitting Ca15(PO4)2(SiO4)6:Eu2+ phosphor for UV-based w-LEDs

被引：8

作者：

Hur, Seyoon ^{[1
]}

Song, Hee Jo ^{[1
]}

Roh, Hee-Suk ^{[1
]}

Kim, Dong-Wan ^{[2
]}

Hong, Kug Sun ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Ajou Univ, Dept Mat Sci & Engn, Suwon 443749, South Korea

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

Powders: solid state reaction; Optical properties; Silicate; Functional applications; ENERGY-TRANSFER; WHITE-LIGHT; LUMINESCENCE; EU2+;

D O I：

10.1016/j.ceramint.2013.05.048

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ca-15(PO4)(2)(SiO4)(6):Eu2+,Ce3+ phosphor was synthesized by a solid-state reaction. Doping of Ce3+ into the Ca2+ site of the Ca-15(PO4)(2)(SiO4)(6):Eu2+ phosphor enhanced the Eu2+ emission greatly, as observed by measuring the photoluminescence properties and the quantum efficiency levels. The mechanism of the enhancement of the Eu2+ emission by Ce3+ doping was investigated by comparing the normalized photoluminescence (PL) spectra with the normalind photoluminescence excitation (PLE) spectra and analyzing the absorbance and the fluorescence lifetime of the Ca-15(PO4)(2)(SiO4)(6):Eu2+,Ce3+ phosphors. Furthermore, the thermolumineseence properties were measured to confirm the thermal stability of the synthesized phosphor when exposed to the high junction temperature of recent high-power LED chips, showing a thermal activation energy bather of 0.213 eV. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：9791 / 9795

页数：5

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