Abstract—
We report a study of upconversion luminescence in BaF2–HoF3 crystals in the visible spectral region under excitation to the 5I5 level of Ho3+ ions by laser radiation with a wavelength of 890 nm. For these excitation conditions, we propose mechanisms responsible for upconversion luminescence from the 5F3, 5S2(5F4) and 5F5 levels of Ho3+ ions.
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This work was supported by the Russian Federation President’s Grants Council, project no. MK-2168.2019.2.
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Lyapin, A.A., Ryabochkina, P.A., Ermakov, A.S. et al. Mechanisms of Upconversion Luminescence in BaF2–HoF3 Crystals under Excitation to the 5I5 Level of Ho3+ Ions. Inorg Mater 56, 1033–1038 (2020). https://doi.org/10.1134/S002016852010009X
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DOI: https://doi.org/10.1134/S002016852010009X