Optical materials

Influence of the chemical composition of the porous matrix and sintering atmosphere on the luminescent properties of bismuth-containing composites

M. A. Girsova, T. V. Antropova, G. F. Golovina, I. N. Anfimova, L. N. Kurilenko

I. V. Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences, 199034 Saint Petersburg, Russia

Abstract: 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 ($\lambda_{\mathrm{em}}$ = 350 nm), blue-green ($\lambda_{\mathrm{em}}$ = 410–550 nm) and orange-red ($\lambda_{\mathrm{em}}$ = 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 Bi$^{2+}$ 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.

Received: 18.08.2022
Revised: 02.11.2022
Accepted: 07.11.2022

DOI: 10.21883/OS.2023.01.54542.4040-22

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