期刊
OPTICS COMMUNICATIONS
卷 291, 期 -, 页码 138-142出版社
ELSEVIER
DOI: 10.1016/j.optcom.2012.11.005
关键词
Temperature sensing; Upconversion; Fluorescence intensity ratio; Hydrothermal method
类别
资金
- National Fundamental Research Program [2013CB921800]
- National Natural Science Foundation of China [11074245, 11204292, 11274299]
- Fundamental Research Funds for the Central Universities
Rare earth doped luminescent materials are promising candidates for temperature sensing. In this paper, pure beta-NaYF4:20%Yb3+, 2%Er3+ microprisms were synthesized by hydrothermal method. The temperature dependence of the fluorescence intensity ratio (FIR) of emission bands centered at 525 nm and 545 nm was measured in the temperature range of 160-300 K under excitation of a 980 nm diode laser. The monotonous increase of FIR with temperature shows that this material can be used for temperature sensing. The dependence of the FIR on temperature is fitted with an exponential function and the effective energy difference obtained is 752 cm(-1), which gives further a temperature sensitivity of 1.20% K-1 at 300 K. The FIR technique was then used to study the effect of heating caused by laser excitation under various powers. (C) 2012 Elsevier B.V. All rights reserved.
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