Luminescence properties of Eu2+-doped Ba3Si6O12N2 green phosphor: concentration quenching and thermal stability

被引：24

作者：

Chen Guantong

Zhuang Weidong ^{[1
]}

Hu Yunsheng

Liu Yuanhong

Liu Ronghui

He Huaqiang

机构：

[1] Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2013年 / 31卷 / 02期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

oxynitride phosphor; white LEDs; photoluminescence; concentration quenching; thermal stability; rare earths; ENERGY-TRANSFER; EMISSION; NITRIDOSILICATES; FLUORESCENCE; EU2+; BA;

D O I：

10.1016/S1002-0721(12)60243-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The efficient Eu2+-doped Ba3Si6O12N2 green phosphors were prepared by a traditional solid state reaction method under N-2/H-2 atmosphere at a temperature up to 1350 degrees C for 12 h. Photoluminescence (PL) properties showed a broad emission band with a peak of 525 nm and the full width of half-emission maximums (FWHM) of 70 nm under 460 nm light irradiation. The X-ray diffraction patterns (XRD) and scanning electron microscope (SEM) images of the synthesized powder demonstrated its pure phase and excellent crystallization. Quenching concentration in this phosphor was found to be 0.3. The mechanisms of concentration quenching and redshift of emission peak with increasing concentration of Eu2+ were studied. The temperature dependence measurement of this green phosphor revealed excellent thermal quenching property compared to silicate green phosphor. It is believed that Ba3Si6O12N2:Eu2+ is an excellent green phosphor for UV or blue chip based white LEDs.

引用

页码：113 / 118

页数：6

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