Effect of Yb3+ concentration on the structures and upconversion luminescence properties of Y2O3:Er3+ ultrafine phosphors

被引：0
作者：
Zhang Yongming [1 ]
Li Yanhong [1 ]
Zang Yang [1 ]
Hong Guangyan [2 ]
Yu Yingning [2 ]
机构：
[1] Shenyang Inst Chem Technol, Sch Mat Sci & Engn, Shenyang 110142, Peoples R China
[2] Chinese Acad Sci, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China
来源：
RARE METALS | 2008年 / 27卷 / 06期
关键词：
ultrafine phosphor; ion concentration; urea homogeneous precipitation method; upconversion luminescence;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Y2O3:Er3- ultrafine phosphors with a varying Yb3+ ion concentration were prepared by a urea homogeneous precipitation method. The results of XRD show that all the samples are of a pure cubic structure and the average crystallite sizes can be calculated as 45, 34. and 28 nm for Y2O3:Er3+ Ultrafine phosphors with Yb3+ ion concentrations of 0, 10%, and 20%, respectively. The lattice constant and cell volume of the ultrafine phosphors decrease with enhancing Yb3+ ion concentration. The upconversion luminescence spectra of all the samples were studied under 980 nm laser excitation. The strong green and red upconversion emission were observed, and attributed to the H-2(11/2) -> I-4(15/2) -> S-4(3/2) I-4(15/2) and F-4(9/2) -> I-4(15/2) transitions of Er3+, respectively. The intensity of red emission increases with increasing Yb3+ ion concentration. The effect of Yb3+ concentration on the structures and upconversion luminescence mechanism were discussed.
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页码：603 / 607
页数：5
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