Abstract
Triorthogermanates BaYb2 – xErxGe3O10 (x = 0.1–0.3) and BaY2 – 10yYb9yEryGe3O10 (y = 0.015–0.15) are synthesized by the solid phase method. According to X-ray powder diffraction data, the compounds crystallize in a monoclinic system, space group P21/m, Z = 2. The concentration and power dependences of upconversion luminescence that occurs in the range of 510–720 nm upon excitation by radiation with a wavelength of 980 nm are studied. The mechanism of energy transfer between optical sites is proposed and the optimal composition of the phosphor is determined. The temperature dependence of the ratio of the luminescence band intensities with maxima at 521 nm and 552 nm (the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions in Er3+) is studied, and conclusions are drawn about the possible application of triorthogermanates as materials for fluorescent temperature sensors.
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The study was supported by the Russian Science Foundation within project no. 19-73-00219.
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Lipina, O.A., Surat, L.L., Melentsova, A.A. et al. BaYb2 – xErxGe3O10 and BaY2 – 10yYb9yEryGe3O10: Luminescent Properties and Prospects for Applications in Remote Temperature Determination. Phys. Solid State 63, 1036–1041 (2021). https://doi.org/10.1134/S1063783421070143
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DOI: https://doi.org/10.1134/S1063783421070143