Influence of the chemical composition of the porous matrix and sintering atmosphere on the luminescent properties of bismuth-containing composites
Girsova M.A. 1, Antropova T.V. 1, Golovina G.F. 1, Anfimova I.A. 1, Kurilenko L.N. 1
1Grebenschikov Institute of Silicate Chemistry RAS, Saint-Petersburg, Russia
Email: girsovama@yandex.ru

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The spectral-optical and luminescence properties of bismuth-containing composite materials based on matrices of high-silica porous glasses are investigated. Luminescence spectra, luminescence excitation spectra, infrared transmission spectra (8000-4000 cm-1) depending on the composition of different types of matrices and sintering atmosphere (nitrogen, argon) of bismuth-containing composite materials were examined. It was found that the samples of bismuth-containing composite materials are characterized by UV (λem=350 nm), blue-green (λem=410-550 nm) and orange-red (λem=600-725 nm) luminescence due to the presence of various bismuth active centers. The analysis of the spectra obtained by near-infrared spectroscopy demonstrates the formation of Bi2+ dimers of bismuth and bismuth active centers associated with silicon. Keywords: Bismuth-containing composite materials, high-silica porous glass, near-infrared spectroscopy, luminescence, bismuth active centers.
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