Widening the Temperature Range of Luminescent Thermometers through the Intra- and Interconfigurational Transitions of Pr3+


In this study, it is shown how the temperature range of luminescent thermometers can be widened in an unprecedented way by combining the intra- and interconfigurational transitions of the Pr3+ ion in a single material. Using Sr2GeO4:Pr3+ crystalline powders as an illustrative example, the implementation of luminescence thermometry is reported in the broadest temperature range up to now (17-600 K) with a remarkable performance: maximum relative sensitivity values of 9.0%.K-1 (at 22 K, cryogenic range), 0.6%.K-1 (at 300 K, physiological range), and 0.5%.K-1 (at 600 K, high-temperature range) and minimum temperature uncertainty of 0.1 K.



subject category

Materials Science; Optics


Brites, CDS; Fiaczyk, K; Ramalho, JFCB; Sojka, M; Carlos, LD; Zych, E

our authors


L.D.C. and E.Z. acknowledge Marco Bettinelli. His great hospitality during our joint visit to Verona at the end of January 2017 made us possible to come up with the idea of this research. This research was supported by the National Science Centre, Poland under grant #UMO-2017/25/B/ST5/00824. This work was partially developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by Portuguese funds through the Fundacao para a Ciencia e a Tecnologia/Ministerio da Educacao e Ciencia (FCT/MEC) and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. Financial support of FCT (PTDC/CTM-NAN/4647/2014 and POCI-01-0145-FEDER-016687) is also acknowledged. C.D.S.B. and J.F.C.B. R. thank their individual grants funded, respectively, by the SusPhotoSolutions (CENTRO-01-0145-FEDER-000005) and Smart Green Homes (POCI-01-0247-FEDER-007678) projects, financed by national funds through the FCT/MEC and Portugal 2020 through European Regional Development Fund.

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