Novel Fluoride Matrix for Dual‐Range Optical Sensors and Visualization

Alexander A. Alexandrov; Lada A. Petrova; Daria V. Pominova; Igor D. Romanishkin; Maria V. Tsygankova; Sergey V. Kuznetsov; Vladimir K. Ivanov; Pavel P. Fedorov

doi:10.20944/preprints202307.1528.v1

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preprints.org > chemistry and materials science > electronic, optical and magnetic materials > doi: 10.20944/preprints202307.1528.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Novel Fluoride Matrix for Dual‐Range Optical Sensors and Visualization

Alexander A. Alexandrov

Version 1 : Received: 21 July 2023 / Approved: 21 July 2023 / Online: 24 July 2023 (03:00:48 CEST)

A peer-reviewed article of this Preprint also exists.

Alexandrov, A.A.; Petrova, L.A.; Pominova, D.V.; Romanishkin, I.D.; Tsygankova, M.V.; Kuznetsov, S.V.; Ivanov, V.K.; Fedorov, P.P. Novel Fluoride Matrix for Dual-Range Optical Sensors and Visualization. Appl. Sci. 2023, 13, 9999. Alexandrov, A.A.; Petrova, L.A.; Pominova, D.V.; Romanishkin, I.D.; Tsygankova, M.V.; Kuznetsov, S.V.; Ivanov, V.K.; Fedorov, P.P. Novel Fluoride Matrix for Dual-Range Optical Sensors and Visualization. Appl. Sci. 2023, 13, 9999.

Abstract

Novel tetragonal matrix Ba0.5Gd0.5-xNaxF2.5-x, where x = 0.05, doped by Yb3+, Ho3+, Er3+, was synthesized by molten salt synthesis (MSS) from nitrate flux. XRD data show that tetragonal phase with a = 4.122(1) Å, c = 17.672(1) Å is stable in argon atmosphere up to 960 °C. Luminescence spectra recorded in 500-900 nm and 1050-1700 nm upon 974 nm pumping demonstrated the characteristic luminescence at 1550 nm (4I13/2 → 4I15/2) for Er3+ and 1150 nm (5I6 → 5I8) for Ho3+. The relative thermal sensitivity (Sr) at 296-316 K were 0.3 %*K-1 and 5.5%*К-1 in shortwave infrared (SWIR) and visible range, respectively. Synthesized luminophores can be used as dual-range optical temperature sensors, which simultaneously operating in visible and SWIR ranges.

Keywords

fluoride matrix; luminescence; thermometry; thermography; molten-salt synthesis

Subject

Chemistry and Materials Science, Electronic, Optical and Magnetic Materials

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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