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- W3203612933 abstract "Nowadays, there is enthusiastic effort to develop luminescent thermometers used for remote and high-sensitivity temperature readout over a wide sensing range. Herein, Pr3+ and Gd3+ co-doped ZrO2 nanocrystals are designed, prepared and investigated by XRD, Raman spectroscopy, XPS, TEM, EDS, DRS, PLE and PL spectroscopy. Upon 275 nm irradiation, the PL spectrum of ZrO2:Pr3+,Gd3+ is found to be composed of a narrow emission peak at 314 nm (Gd3+ 6P7/2-8S7/2), a broad defect-related emission band at 400 nm, and several emission peaks in the wavelength region of 585-700 nm (Pr3+ 1D2-3H4, 3P0-3H6, and 3P0-3F2), which exhibit different thermal responses owing to the effects of the various non-radiative relaxation processes and trap energy levels. Accordingly, the luminescence intensity ratio (LIR) between the Pr3+ 1D2-3H4 and Gd3+ 6P7/2-8S7/2 transitions demonstrates excellent relative sensing sensitivity values ((2.32 ± 0.01)% K-1-(8.32 ± 0.05)% K-1) and low temperature uncertainties (0.08 K-0.28 K) over a wide temperature sensing range of 303 K to 573 K, which are remarkably better than those of many other luminescence thermometers. What is discussed in the present study may be conducive to broadening the research region of RE3+ doped luminescence thermometric phosphors, especially for materials with rich 4f-4f transition lines and defect-related luminescence." @default.
- W3203612933 created "2021-10-11" @default.
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- W3203612933 date "2021-01-01" @default.
- W3203612933 modified "2023-10-15" @default.
- W3203612933 title "Synthesis of ZrO<sub>2</sub>:Pr<sup>3+</sup>,Gd<sup>3+</sup> nanocrystals for optical thermometry with a thermal sensitivity above 2.32% K<sup>−1</sup> over 270 K of sensing range" @default.
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- W3203612933 doi "https://doi.org/10.1039/d1dt02070f" @default.
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