The up-conversion properties of Yb3+ and Er3+ doped Y4Al2O9 phosphors

被引：23
作者：
You, Weixiong [1 ]
Lai, Fengqin [1 ]
Jiang, Honghui [1 ]
Liao, Jinsheng [1 ]
机构：
[1] Jiangxi Univ Sci & Technol, Ganzhou 341000, Jiangxi, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 07期
关键词：
Up-conversion properties; Yb3+; Er3+; Y4Al2O9; NANOCRYSTALS; LUMINESCENCE; EXCITATION; EMISSION; RED; GLASS; GREEN; IONS; TB3+;
D O I：
10.1016/j.physb.2012.01.077
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Er3+ doped and Yb3+/Er3+ co-doped Y4Al2O9 phosphors are prepared by the sol-gel method. The effect of dopant concentration on the structure and up-conversion properties is investigated by X-ray diffraction (XRD) and photoluminescence, respectively. XRD pattern indicates that the sample structure belongs to monoclinic. Under 980 nm excitation, the green and red up-conversion emissions are observed and the emission intensities depended on the Yb3+ ion concentration. The green up-conversion emissions decrease with the increase of Yb3+ concentration, while red emission increases as Yb3+ concentration increases from 0 to 8 at% and then decreases at high Yb3+ concentration. The mechanisms of the up-conversion emissions are discussed and results shows that in Er3+ and Yb3+/Er3+ co-doped system, cross-relaxation (CR) and energy transfer (ET) processes play an important role for the green and red up-conversion emissions. (C) 2012 Elsevier BY. All rights reserved.
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收藏
页码：1094 / 1098
页数：5
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