Comparative investigation of photoluminescence and long-lasting phosphorescence properties in the (CaO-CaBr2-SiO2):: Eu2+ phosphor system

被引：21
|
作者：
Xia, Zhiguo [1 ]
Liu, Jie
Li, Qiang
Sun, Jiayue
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[2] Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China
[3] Beijing Technol & Business Univ, Coll Chem & Environm Engn, Beijing 100037, Peoples R China
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 01期
关键词：
D O I：
10.1149/1.2364307
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We developed a (CaO - CaBr2 - SiO2) : Eu2+ long-lasting phosphor system. The photoluminescence (PL) spectrum reveals that two quite different emission bands can be observed, in which is presumed that Eu2+ ions occupy two types of sites, Eu(1) and Eu(2). The phosphor shows strong blue and weak greenish yellow emission under 365 nm UV light. The long-lasting phosphorescence (LLP) spectrum testifies to the existence of two types of emission centers, but the corresponding emission intensity is reversed. It emits obvious greenish yellow light and shows strong long-lasting phosphorescence in the dark. The possible mechanism of the unusual PL and LLP emission is also discussed. (c) 2006 The Electrochemical Society.
引用
收藏
页码：J4 / J8
页数：5
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