Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 770, Issue -, Pages 1237-1243Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.167
Keywords
Thermometry; Apatite; Energy transfer; Fluorescence intensity ratios
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Funding
- National Natural Science Foundations of China [51672257, 51872269, 41672044]
- Fundamental Research Funds for the Central Universities [2652017335, 53200759022, 53200759023]
- State Scholarship Fund of China Scholarship Council (CSC)
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The novel apatite-type phosphor Ca9Tb(PO4)(5)(SiO4)F-2:Mn2+ (CTPSF:Mn2+) has been successfully synthesized and it demonstrated a potential for optical thermometry. The energy transfer process between Tb3+ and Mn2+ was of resonant type via a dipole-dipole mechanism based on the Inokuti-Hirayama theoretical model, and the energy transfer (ET) efficiency and ET rate were estimated. In view of the energy transfer behavior, a strategy, involving the use of Tb3+ and Mn2+ dual-emitting centers with different thermal quenching behavior, has been developed to achieve temperature sensitivity and good signal discrimination. The temperature dependence of the fluorescence intensity ratios (FIR) for the dual-emission bands peaking at 548 and 595 nm was studied in the range of 298-573 K under excitation of 377 nm ultraviolet light and the maximum relative sensitivity was approximately 1.92% K-1 at 423 K. It is expected that this preliminary study will provide an important advance in exploring novel ratiometric optical thermometry. (C) 2018 Elsevier B.V. All rights reserved.
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