Ratiometric thermometry using single Er 3+ -doped CaWO 4 phosphors.

Autor: Kolesnikov IE; St. Petersburg State University, Universitetskaya nab. 7-9, 199034, St. Petersburg, Russia., Mamonova DV; St. Petersburg State University, Universitetskaya nab. 7-9, 199034, St. Petersburg, Russia., Kurochkin MA; St. Petersburg State University, Universitetskaya nab. 7-9, 199034, St. Petersburg, Russia., Medvedev VA; St. Petersburg State University, Universitetskaya nab. 7-9, 199034, St. Petersburg, Russia., Bai G; Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, China Jiliang University, Hangzhou 310018, People's Republic of China., Kolesnikov EY; Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya str. 29, 195251, St. Petersburg, Russia.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2022 Nov 15; Vol. 34 (5). Date of Electronic Publication: 2022 Nov 15.
DOI: 10.1088/1361-6528/ac9a55
Abstrakt: Single doped CaWO 4 :Er 3+ phosphors were synthesized and studied for application of optical thermal sensing within a wide range of 98-773 K. Ratiometric strategy utilizing two luminescence intensity ratios, one between host and Er 3+ band (LIR 1 ) and second between different Er 3+ transitions (LIR 2 ), results in self-referencing temperature readouts. The presence of two temperature-dependent parameters could improve thermometric characteristics and broaden the working temperature range compared to a usual single-parameter thermometer. Thermometric performances of prepared samples were evaluated in terms of thermal sensitivities, temperature resolution and repeatability. The highest sensitivity of 2.09% K -1 @300 K was found for LIR 1 , whereas LIR 2 provided more accurate thermal sensing with a temperature resolution of 0.06-0.1 K. Effect of Er 3+ doping concentration on sensing properties were studied. The presented findings indicate that CaWO 4 :Er 3+ phosphors are perspective in dual-mode thermal sensing with high sensitivity and sub-degree resolution.
(© 2022 IOP Publishing Ltd.)
Databáze: MEDLINE
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