Journal
JOURNAL OF LUMINESCENCE
Volume 200, Issue -, Pages 103-110Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2018.04.009
Keywords
Molybdate; Eu3+; Tb3+; Optical temperature sensing
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Funding
- Open Project Program of Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University, China [PEBM201614]
- Harbin Innovative Talent in Science and Technology Research Special Fund Project [2014RFXXJ091]
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CaMoO4: 5% Tb3+, x% Eu3+ (x = 0.3, 0.5, 1, 2) phosphors were synthesized successfully via precipitation method. The Temperature-dependent photoluminescence (PL) spectra of the synthesized phosphors were measured. Fluorescence Intensity Ratio (FIR) of Eu3+ to Tb3+ is dependent on temperature, and the FIR increases with the increase of temperature. The Fluorescence Intensity Ratio was used characterize the temperature. When FIR of Eu3+ to Tb3+ is used to characterize the temperature, the sensitivity increases with the increase of Eu3+ concentration. The maximum value of sensitivity is 0.095 K-1 (at 603 K), when the concentration of Eu3+ is 2%. The sensitivity is one order of magnitude higher than common Er3+ activated materials. In addition, the lower concentration of Eu3+, the greater change range of luminescent color of the samples which is reflected from color coordinates.
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