Luminescence properties of rare-earth doped α-SiAlONs

被引：0
|
作者：
Xie, Rong-Jun [1 ]
Mitomo, Mamoru [1 ]
Hirosaki, Naoto [1 ]
机构：
[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
来源：
SCIENCE OF ENGINEERING CERAMICS III | 2006年 / 317-318卷
关键词：
photoluminescence; rare earth; alpha-SiAlON; phosphor;
D O I：
10.4028/www.scientific.net/KEM.317-318.797
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：
Rare-earth doped Ca-alpha-SiAlON phosphors, with the compositions of (Ca1-3/2xREx)(m/2)Si12-m-nAlm+nOnN16-n(RE = Ce, Sm, Eu, Tb, Yb and Dy, 0.5 <= m = 2n <= 3.0), were prepared by reaction at 1700 degrees C for 2h under 10 atm N-2. The concentration of rare earths varied from 3 to 30 at% with respect to Ca. The photoluminescence properties of the powders were investigated at room temperature. The results show that (i) strong visible emissions are observed in rare-earth doped Ca-alpha-SiAlONs; (ii) the emission properties can be optimized by tailoring the activator concentration and the composition of the alpha-SiAlON host crystal; and (iii) the yellow Eu2+-doped Ca-alpha-SiAlON phosphors can be used in warm white LEDs.
引用
收藏
页码：797 / 802
页数：6
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