Ga-modified YAG:Pr3+ dual-mode tunable luminescence thermometers


The temperature determination using luminescent materials is nowadays considered the perspective remote technique for temperature gauging, despite the few examples reported so far combining wide operating temperature range with satisfying relative thermal sensitivity and temperature uncertainty values. In this paper, we study the Y3(Al,Ga)5O12:0.1%Pr phosphors with controlled Ga:Al composition to deliberately affect their luminescent properties. We demonstrate that the energy barrier for thermal quenching of the 5d-4f luminescence can be effectively tailored, yielding the fine tune of the thermometric parameters of these phosphors. By exploiting time-resolved and time-integrated approaches we show that the thermometers can cover the 17-700 K temperature range with a maximum relative sensitivity up to 3.6%K- 1 and a temperature uncertainty as lower as 0.02 K. For each sample, the temperature readout of the distinct thermometric parameters is compared illustrating that the performance of the thermometers should also consider the relative temperature error between the calculated and the measured temperatures, besides relative thermal sensitivity and temperature uncertainty.




Engineering, Environmental; Engineering, Chemical


Bolek, P; Zeler, J; Brites, CDS; Trojan-Piegza, J; Carlos, LD; Zych, E

nossos autores


This research was supported by the Polish National Science Centre (NCN) under grants #UMO2017/25/B/ST5/00824 and 2018/29/B/ST5/00420. This work was also developed within the scope of the project CICECO - Aveiro Institute of Materials, UIDB/50011/2020, financed by Portuguese funds through the FCT/MEC and when appropriate cofinanced by FEDER under the PT2020 Partnership Agreement. The financial support from the project NanoHeatControl, POCI010145FEDER031469, funded by FEDER, through POCI and by Portuguese funds (OE) , through FCT/MCTES, and by European Union's Horizon 2020 FET Open program under grant agreements no. 801305 are acknowledged. E. Z. and L. D. C. are grateful to the Polish National Agency for Academic Exchange (NAWA) for support under the NAWABekker #PPN/BEK/2018/1/00333/DEC/1 and NAWAUlam #PPN/ULM/2019/1/00077/U/00001 projects, respectively. Finally, the authors express their gratitude to referee #4 of our manuscript for the constructive, detailed, didactic, and extremely useful comments that definitively contributed to the improvement of the text.

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