Preparation and investigation on down-conversion near infrared emission of Tb3+, Yb3+ co-doped Y2O3 transparent ceramics

被引：2
|
作者：
Lin H. [1 ,2 ]
Zhou S. [1 ]
Hou X. [1 ,2 ]
Li Y. [1 ,2 ]
Li W. [1 ,2 ]
Teng H. [1 ,2 ]
Jia T. [1 ,2 ]
机构：
[1] Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
[2] Graduate University of Chinese Academy of Sciences
来源：
Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 12期
关键词：
Cooperative down-conversion emission; Energy transfer mechanisms; Materials; Near infrared; Transparent ceramics;
D O I：
10.3788/AOS20103012.3547
中图分类号：
学科分类号：
摘要：
Tb3+, Yb3+ codoped Y2O3 (mole fraction x=0.02, 0.05, 0.1) transparent ceramics of high transparency have been prepared by vacuum sintering and the down-conversion near infrared (NIR) emission has been demonstrated upon a 484 nm excitation. The dominant energy transfer mechanism is the cooperative down-conversion from 5D4 level of one Tb3+ ion to the 2F5/2 level of two Yb3+ ions. The suppression of Tb4+ during vacuum sintering and the suppression of Yb2+ due to the nature of Y2O3 lattice, together with the large energy gap between Tb3+:5D4 level and Tb4+-Yb2+ charge transfer state (CTS) and the low phonon energy of Y2O3 make the non-radiative influence from the CTS negligible. In addition, the contribution of Tb3+:5D4 → one Yb3+:2F5/2 (non-radiative) → Yb3+:2F7/2 (radiative) process to NIR emission should be little due to the large energy gap between Tb3+:5D4 level and low phonon energy of Y2O3.
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页码：3547 / 3551
页数：4
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