Improving monochromaticity of upconversion luminescence by codoping Eu3+ ions in Y2O3:Ho3+, Yb3+ nanocrystals

被引：22
|
作者：
Sheng, Y. Q. [1 ]
Xu, L. L. [2 ]
Liu, J. [1 ]
Zhai, D. [1 ]
Zhang, Z. G. [1 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150080, Peoples R China
[2] Harbin Normal Univ, Dept Phys, Harbin 150080, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 02期
关键词：
Upconversion luminescence; Rare earth; Energy transfer; LANTHANIDE;
D O I：
10.1016/j.jlumin.2009.09.014
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Upconversion (UC) luminescence of Y2O3:Ho3+, Yb3+ nanocrystals codoped with different concentrations of Eu3+ ions were investigated to improve the monochromaticity of the UC emission. The results show that the monochromaticity, quantified by a parameter SR, increases as the concentration of Eu3+ ions becomes higher, which is due to the energy transfer between I-5(7) (Ho3+) and F-7(6) (Eu3+). The energy transfer accelerates the relaxation of Ho3+ ions from the I-5(7) to I-5(8) state and then quenches the red emission. The influence of the Eu3+ concentration on the pump power dependence of the red UC fluorescence in Y2O3:Ho3+, Yb3+, Eu3+ nanocrystals is verified using the steady-state rate equation theory. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：338 / 341
页数：4
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