Preparation and luminescent characteristics of Eu3+-activated MgxZn1-xGa2O4 nanocrystals

被引：16
作者：
Tsai, BS [1 ]
Chang, YH [1 ]
Chen, YC [1 ]
机构：
[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 407卷 / 1-2期
关键词：
luminescence; phosphors; sol-gel synthesis;
D O I：
10.1016/j.jallcom.2005.06.021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nanometer-scale Eu-doped MgxZn1-xGa2O4 phosphorpowders have been synthesized by sol-gel process. The crystallization behaviors were investigated as well as the excitation and photoluminescence spectra employed to study the luminescence properties of Eu3+ in Mg-Zn mixed gallate. The grain size gradually decreases from 32.5 to 8.6 nm as Mg content increases. The excitation spectrum varies with the composition and consists of a weak charge transfer band and intense f-f transitions. Under the excitation at 394nm, the Eu-doped MgxZn1-xGa2O4 phosphors display strong red luminescence at about 612nm belonging to D-5(0) -> F-7(2) electric dipole transition. Both the emission intensity and life-time increase with the arising concentration of Mg. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：289 / 293
页数：5
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