New Green Phosphor Ba3Si6O12N2:Eu for White LED: Crystal Structure and Optical Properties

被引：64
|
作者：
Mikami, Masayoshi [1 ]
Shimooka, Satoshi [1 ]
Uheda, Kyota [1 ]
Imura, Hiroyuki [1 ]
Kijima, Naoto [1 ]
机构：
[1] Mitsubishi Chem Grp Sci & Technol Res Ctr Inc, Aoba Ku, Yokohama, Kanagawa 2278502, Japan
来源：
SIAIONS AND NON-OXIDES | 2009年 / 403卷
关键词：
Ba3Si6O12N2; Ba3Si6O9N4; White LED; Phosphor; Density Functional Theory; LUMINESCENCE;
D O I：
10.4028/www.scientific.net/KEM.403.11
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：
A new oxynitride, Ba3Si6O12N2, has been synthesized. The crystal structure has been successfully determined by close collaboration between experiment and first-principles calculation. This compound doped with Eu exhibits intense green photoluminescence with high color purity under near-ultraviolet to blue light excitation; in particular, it has much less thermal quenching than (Ba,Sr,Eu)(2)SiO4. Thus (Ba,Eu)(3)Si6O12N2 appears promising green phosphor for white LED backlight for display. The atomic/electronic structure is discussed in comparison with Ba3Si6O9N4, which could not become efficient phosphor by doping Eu due to strong thermal quenching at room temperature.
引用
收藏
页码：11 / 14
页数：4
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