Journal
JOURNAL OF RARE EARTHS
Volume 39, Issue 3, Pages 261-268Publisher
ELSEVIER
DOI: 10.1016/j.jre.2020.06.003
Keywords
Sr4La(PO4)(3)O; FIR; Optical thermometry; Energy transfer; Rare earths
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Funding
- Natural Science Foundation of Zhejiang Province, China [LY19E020005]
- Science and Technology Innovation Platform and Talent Plan of Zhejiang [2017R52037]
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Eu2+/Sm3+ co-doped Sr4La(PO4)(3)O phosphors were synthesized and showed high sensitivity and a wide range of temperature measurements, making them promising for applications in high-temperature optical thermometry.
Eu2+/Sm3+ co-doped dual-emitting Sr4La(PO4)(3)O phosphors were synthesized through a convenient high temperature solid state reaction in reductive atmosphere. The structure, luminescence, energy transfer and temperature-dependent luminescence properties of Eu2+/Sm3+ co-doped Sr4La(PO4)(3)O phosphors were researched and analyzed in detail. The blue emission of Eu2+ and the red emission of Sm3+ can work together as FIR signals. Based on the different response characteristics of these two ion emissions to temperature, Sr4La(PO4)(3)O:Eu2+/Sm3+ phosphor achieves the relative sensitivity of 0.48384%/K and a wide range of temperature measurements from room temperature to 573 K. The results reveal that the Sr4La(PO4)(3)O:Eu2+/Sm3+ phosphor has application prospect in the field of high temperature optical thermometry. The energy transfer mechanism is proved to be the dipole-dipole interaction between Eu2+ and Sm3+ ions. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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