Near-infrared quantum cutting in Ho3+/Yb3+ co-doped BaZr0.8Y0.2O3-δ

被引：8
作者：
Chen, Tiejin [1 ]
Yang, Xiaoliang [1 ]
Xia, Wenbin [1 ]
Gao, Xuejun [1 ]
Li, Wei [1 ]
Xiao, Siguo [1 ]
机构：
[1] Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Hunan, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2016年 / 211卷
基金：
美国国家科学基金会;
关键词：
Luminescence materials; Rare earth ions; Quantum cutting; Quantum efficiency; Co-precipitation; Phosphor; PHOTOLUMINESCENCE PROPERTIES; DOWN-CONVERSION; LUMINESCENCE; DOWNCONVERSION; CATIO3; SR;
D O I：
10.1016/j.mseb.2016.05.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel HO3+ -> Yb3+ -> Ho3+ multi-step energy transfer caused quantum cutting under 455 nm excitation is observed in Ho3+/Yb3+ co-doped BaZr0.8Y0.2O3-delta phosphor. During the quantum cutting process, Yb3+ ions efficiently increase the particle population of I-5(6) level of Ho3+, resulting in 10 and 8 times of enhancement of HO3+ emission at 1216 nm (I-5(6) -> I-5(8)) and 1926 nm (I-5(7) -> I-5(8)), respectively. It is interesting that the F-2(5/2) -> F-2(7/2) emission of Yb3+ ions themselves is very weak although the quantum cutting is performed by the Ho3+/Yb3+ ion-pairs. The result indicates that the Yb3+ -> Ho3+ back energy transfer in the BaZr0.8Y0.2O3-delta phosphor is quite efficient and helpful for the enhancement of Ho3+ emission in near infrared region. A new valid method based on luminescence intensity ratio is developed to estimate the quantum cutting efficiency. It is found that the energy transfer form Ho3+ to Yb3+ is 52.8% in the phosphor with optimum Ho3+/Yb3+ doping concentration and 90% of near infrared emission of Ho3+ is performed by the multi-step energy transfer induced quantum cutting. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：20 / 25
页数：6
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