Identification of The Two Luminescence Sites of Sr2SiO4:Eu2+ and (Sr,Ba)2SiO4:Eu2+ Phosphors

被引：26

作者：

Hoang-Duy Nguyen ^{[1
]}

Yeo, In-Hyeong ^{[2
]}

Mho, Sun-il ^{[1
]}

机构：

[1] Ajou Univ, Div Energy Syst Res, Suwon 443749, South Korea

[2] Dongguk Univ, Dept Chem, Seoul 100715, South Korea

来源：

NANOSCALE LUMINESCENT MATERIALS | 2010年 / 28卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-EMITTING-DIODES; YELLOW PHOSPHOR;

D O I：

10.1149/1.3367223

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Europium activated strontium orthosilicate Sr2SiO4:Eu2+ phosphors were prepared by a solid state reaction method using flux. Two emissions bands of blueish-green at 490 nm (SI) and of yellow at 560 nm (SII) were observed. The two emission bands are assigned to the 4f-5d transition of Eu2+ ions in two different cation sites in alpha'-Sr2SiO4 orthorhombic lattices. The relative intensities of two emission bands and the efficient yellow-emission strongly depend on the fluxes used for the preparation process and the Eu2+ concentration in the Sr2SiO4:Eu2+ phosphors. The emission intensity of Eu2+ was also increased especially for the SII site, by incorporating Ba2+ into the lattice (BaxSr2-xSiO4).

引用

页码：167 / 173

页数：7

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