Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 103, Issue 2, Pages 1046-1056Publisher
WILEY
DOI: 10.1111/jace.16766
Keywords
optical materials; properties; optical thermometry; surface modification; up-conersion
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Funding
- National Key RD Plan [2017YFB0403100, 2017YFB0403105]
- National Natural Science Foundation of China [61575182, 51832005, LR19F050001]
- Preeminence Youth Science Funds of Zhejiang Province
- Applied Research Program of Commonweal Technology of Zhejiang Province [2018C37042]
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Non-contact temperature sensors based on the fluorescence intensity ratio (FIR) have been widely investigated owing to their high sensitivity and reliable real-time monitoring. Herein, the SiO2-coated LiY(MoO4)(2)@SiO2:Er3+,Yb3+ phosphor was investigated as an optical thermometry material, which was synthesized using the conventional solid state reaction and coated by a facile wet chemical route. The effect of surface modification on FIR was systematically characterized by structural analyses and spectral measurements and the temperature-dependent up-conversion FIR was investigated from 303 to 603 K under a 980 nm laser excitation. The results showed that the FIR value was thermally stable and the SiO2 coating led to a higher FIR sensitivity as well as a higher saturation threshold. This work would pave a way to design interesting optical thermometry materials in up-conversion phosphors with better properties.
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