Optical High Temperature Sensor Based on Enhanced Green Upconversion Emissions in Er3+-Yb3+-Li+ Codoped TiO2 Powders

被引：14
作者：
Cao, B. S. [1 ,2 ]
He, Y. Y. [3 ]
Sun, Y. [1 ]
Song, M. [1 ]
Dong, B. [1 ]
机构：
[1] Dalian Nationalities Univ, Sch Sci, Dalian 116600, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[3] Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2011年 / 11卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Er3+-Yb3+ Codoped TiO2; Li+ Codoping; Green Upconversion Emission; Optical Temperature Sensor; DOPED SILICA FIBERS; LI+ IONS; ZNO NANOCRYSTALS; ER3+-DOPED TIO2; FLUORESCENCE; ER3+;
D O I：
10.1166/jnn.2011.5236
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The Er3+-Yb3+-Li+ codoped TiO2 powders have been prepared by sol-gel method. The strong enhancement of green and red upconversion emissions were obtained for Er3+-Yb3+ codoped TiO2 by additional Li+ codoping and investigated using 976 nm semiconductor laser diode excitation. The enhanced upconversion emissions by the addition of Li+ resulted from the formation of Li compound with lower crystal field symmetry. The fluorescence intensity ratio (FIR) of green upconversion emissions from the transitions of H-2(11/2) > 4I(15/2) and S-4(3/2) -> I-4(15/2) of Era in the Er3+-Yb3+-Li+ codoped TiO2 has been studied as a function of temperature in the range of 300-925 K, and the maximum sensitivity was determined to be 0.0025 K-1. Er3+-Yb3+-Li+ codoped TiO2 material with the highest operating temperature up to 925 K, has higher temperature sensitivity and fluorescence efficiency being a promising candidate for applications in optical high temperature sensor.
引用
收藏
页码：9899 / 9903
页数：5
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