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Multimodal non-contact luminescence thermometry with Cr-doped oxides

DOI: 10.3390/s20185259 DOI Help

Authors: Vitaliy Mykhaylyk (Diamond Light Source) , Hans Kraus (University of Oxford) , Yaroslav Zhydachevskyy (Institute of Physics, Polish Academy of Sciences; Lviv Polytechnic National University) , Volodymyr Tsiumra (Institute of Physics, Polish Academy of Sciences; Ivan Franko National University of Lviv) , Andriy Luchechko (Ivan Franko National University of Lviv) , Armin Wagner (Diamond Light Source) , Andrzej Suchocki (Institute of Physics, Polish Academy of Sciences; University of Bydgoszcz)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Sensors , VOL 20

State: Published (Approved)
Published: September 2020

Open Access Open Access

Abstract: Luminescence methods for non-contact temperature monitoring have evolved through improvements of hardware and sensor materials. Future advances in this field rely on the development of multimodal sensing capabilities of temperature probes and extend the temperature range across which they operate. The family of Cr-doped oxides appears particularly promising and we review their luminescence characteristics in light of their application in non-contact measurements of temperature over the 5–300 K range. Multimodal sensing utilizes the intensity ratio of emission lines, their wavelength shift, and the scintillation decay time constant. We carried out systematic studies of the temperature-induced changes in the luminescence of the Cr3+-doped oxides Al2O3, Ga2O3, Y3Al5O12, and YAlO3. The mechanism responsible for the temperature-dependent luminescence characteristic is discussed in terms of relevant models. It is shown that the thermally-induced processes of particle exchange, governing the dynamics of Cr3+ ion excited state populations, require low activation energy. This then translates into tangible changes of a luminescence parameter with temperature. We compare different schemes of temperature sensing and demonstrate that Ga2O3-Cr is a promising material for non-contact measurements at cryogenic temperatures. A temperature resolution better than ±1 K can be achieved by monitoring the luminescence intensity ratio (40–140 K) and decay time constant (80–300 K range).

Journal Keywords: non-contact luminescence thermometry; luminescence decay thermometry; intensity ratio thermometry; wavelength shift thermometry; Cr3+ emission

Subject Areas: Materials, Physics

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