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Batygov, S. Kh; Brekhovskikh, M. N.; Moiseeva, L. V.; Vinokurova, V. V.; Kirikova, N. Yu; Kondratyuk, V. A.; Makhov, V. N.
Russian journal of inorganic chemistry, 08/2023, Letnik: 68, Številka: 8Journal Article
Chromium trifluoride-doped fluoride glasses in the ZrF 4 –BaF 2 –LaF 3 –AlF 3 –NaF (ZBLAN) system with partial substitution of fluorine for chlorine have been synthesized. The spectral data obtained confirm that chromium ions enter the glass structure and exhibit broadband luminescence caused by the 4 T 2 → 4 A 2 transition in the Cr 3+ ion. The observed long-wavelength shift of the broadband luminescence band and Cr 3+ absorption bands in fluoride–chloride glass compared to fluoride glass corresponds to the expected behavior of the Cr 3+ luminescence and absorption spectra when fluoride ions are replaced by chloride ions, which should lead to a weakening of the strength of the crystal field acting on Cr 3+ ions. At room temperature, the luminescence of Cr 3+ ions at 888 and 908 nm is strongly quenched due to the thermally stimulated nonradiative transition from the 4 T 2 excited state to the 4 A 2 ground state.
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