Enhancement of the upconversion photoluminescence intensity in Li+ and Er3+ codoped Y2O3 nanocrystals

被引：106
|
作者：
Bai, Yunfeng [1 ]
Yang, Kun [1 ]
Wang, Yuxiao [1 ]
Zhang, Xueru [1 ]
Song, Yinglin [1 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 15001, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2008年 / 281卷 / 10期
关键词：
D O I：
10.1016/j.optcom.2008.01.014
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Infrared-to-visible upconversion luminescence spectra are investigated in Li+ and Er3+ codoped Y2O3 nanocrystals. By introducing Li+ ions, the upconverted emission intensity is found to be greatly enhanced when compared with the nanocrystals with the Li+ absent. The cause of the enhancement is believed to be the modification of the local symmetry of the Er3+ ion, which increases the intra-4f transitions of Er3+ ion, and the homogeneous distribution of Er3+. While in some other Er3+ doped oxides, such as ZnO, ZrO2, etc., the upconversion intensity of Er3+ ions could also be greatly increased by doping Li+. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：2930 / 2932
页数：3
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