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The comparison of the thermometric performance of optical ceramics, microcrystals and nanocrystals of Cr3+- doped Gd3Ga5O12 garnets
Autorzy
Rok wydania
2023
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
963
Strony
171284/1-171284/8
DOI
10.1016/j.jallcom.2023.171284
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The remote temperature readout capability offered by luminescent thermometry has high application potential. Designing thermometers with predefined thermometric parameters is only possible by understanding the processes responsible for temperature-induced changes in the spectroscopic properties of phosphor. One of the key factors, that should be considered, is the influence of the morphology of the phosphor on their spectroscopic properties. In this work, we present for the first time an analysis of the influence of material morphology on the thermometric properties of a ratiometric luminescent thermometer based on the luminescence intensity ratio of 2 E→4 A2 to 4 T2→4 A2 emission bands in Gd3Ga5O12:Cr3+ nanocrystals, microcrystals and optical ceramics. As shown, limitations in the thermal coupling between the 2 E and 4 T2 levels occurring in the cryogenic temperature range allowed to achieve a relative sensitivity of 5.8%/K at 11 K in optical ceramics compared to 2.6%/K and 1.95%/K in microcrystals and nanocrystals, respectively.
Słowa kluczowe
Luminescence thermometry, Cr3 +, Ratiometric thermometry, Nanocrystals, Microcrystals, Ceramics
Adres publiczny
http://dx.doi.org/10.1016/j.jallcom.2023.171284
Strona internetowa wydawcy
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