Journal
CURRENT APPLIED PHYSICS
Volume 14, Issue 8, Pages 1067-1071Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2014.05.020
Keywords
Optical thermometry; Fluorescence intensity ratio; Hydrothermal method; Thermally coupled energy levels
Funding
- National Natural Science Foundation of China [501100001809, 11374291, 11274299, 11204292, 11311120047]
- Fundamental Research Funds for the Central Universities [WK2030020021]
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Dy3+ doped BaYF5 nanoparticles with tetragonal structure were synthesized by hydrothermal method and solvothermal method. The structural and the luminescent properties of the samples were characterized by X-ray diffraction pattern, TEM and photoluminescence spectra. Emission of Dy3+ originated from I-4(15/2) located at 450 nm and F-4(9/2) located at 478 nm, 573 nm and 660 nm were observed under excitation of 355 nm laser. Behavior of fluorescence intensity ratio with temperature increasing from room temperature to approximately 800 K was investigated. And the optimum temperature range for thermometry is obtained to be 550-800 K according to its sensitivity-temperature relation, indicating the potential application of BaYF5:Dy3+ as a luminescent temperature sensor. (C) 2014 Elsevier B.V. All rights reserved.
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