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Thermal stability of tin charge states in the structure of the (As2Se3)0.4(SnSe)0.3(GeSe)0.3 glass

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Abstract

Two valence states of tin atoms (namely, the doubly charged Sn2+ and quadruply charged Sn4+ states) in the structure of the (As2Se3)0.4(SnSe)0.3(GeSe)0.3 glasses are identified by 119Sn Mössbauer spectroscopy. It is demonstrated that the concentration ratio of the doubly charged Sn2+ and quadruply charged Sn4+ states in the glass of this composition depends on the rate of quenching of the melt and on the initial temperature of the melt before quenching. The optical band gap and the activation energy for electrical conduction of the studied glass do not depend on the concentration ratio of the Sn2+ and Sn4+ ions. This behavior of the optical band gap and the activation energy is explained within the model according to which the structure of the glasses under investigation is built up of the structural units AsS3/2, As2/2Se4/4, GeSe4/2, SnSe4/2, and SnSe3/3, which correspond to the compounds AsSe3, AsSe, GeSe2, SnSe2, and SnSe, respectively.

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References

  1. Bordovskii, G.A., Castro, R.A., Seregin, P.P., and Dobrodub, A.A., Properties and Structure of (As2Se3)1−z (SnSe) z − x (GeSe) x and (As2Se3)1−z (SnSe2) z − x (GeSe2) x Glasses, Fiz. Khim. Stekla, 2006, vol. 32, no. 3, pp. 438–445 [Glass Phys. Chem. (Engl. transl.), 2006, vol. 32, no. 3, pp. 320–325].

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Authors and Affiliations

  1. Herzen Russian State Pedagogical University, nab. Reki Moiki 48, St. Petersburg, 191186, Russia

    G. A. Bordovskii, R. A. Castro, A. V. Marchenko & P. P. Seregin

Authors
  1. G. A. Bordovskii
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  2. R. A. Castro
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  3. A. V. Marchenko
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  4. P. P. Seregin
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Corresponding author

Correspondence to P. P. Seregin.

Additional information

Original Russian Text © G.A. Bordovskii, R.A. Castro, A.V. Marchenko, P.P. Seregin, 2007, published in Fizika i Khimiya Stekla.

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Bordovskii, G.A., Castro, R.A., Marchenko, A.V. et al. Thermal stability of tin charge states in the structure of the (As2Se3)0.4(SnSe)0.3(GeSe)0.3 glass. Glass Phys Chem 33, 467–470 (2007). https://doi.org/10.1134/S1087659607050069

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  • DOI: https://doi.org/10.1134/S1087659607050069

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