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Effect of Pulsed Photon Treatment on Electrophysical and Thermophysical Properties of n-Type Solid Solution Based on Bi2Te3–Bi2Se3: I. Electrophysical Properties

  • EFFECT OF ENERGY FLUXES ON MATERIALS
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Inorganic Materials: Applied Research Aims and scope

Abstract

The effect of the pulsed photon treatment exerted on the electrical conductivity, the thermal EMF, and the power factor of n-type solid solution Bi2Te3–Bi2Se3 has been studied. The samples have been obtained by means of powder metallurgy in two stages consisting in the synthesis and hot pressing in an argon atmosphere. It has been found that the pulsed photon treatment in an argon atmosphere of samples synthesized by means of powder metallurgy leads to the surface layer recrystallization and to the changes in the phase composition owing to selenium sublimation. As a result of this, the concentration of free charge carriers in the material decreases, the thermal EMF exhibits an increase, and the electrical conductivity decreases. Depending on the pulse intensity, the mobility of free charge carriers can either decrease or increase. This makes it possible to choose a mode of pulsed photonic processing wherein the relative increase in the thermal EMF exceeds the decrease in the electrical conductivity of the material, as a result of which the power factor of the material exhibits a 2.6% increase.

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Funding

This work was financially supported by the Ministry of Education and Science of the Russian Federation as a part of the Decree of the Russian Federation Government no. 218 of April 9, 2010, agreement no. 03.G25.31.0246.

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Authors and Affiliations

  1. Basic Scientific and Educational Center Physics and Technology of Thermoelectric Phenomena, Voronezh State Technical University, 394062, Voronezh, Russia

    A. A. Grebennikov & A. I. Bocharov

  2. Voronezh State Technical University, 394026, Voronezh, Russia

    S. B. Kushchev, D. V. Serikov, A. V. Kostyuchenko & E. N. Fedorova

  3. Scientific and Production Corporation RIF, 394062, Voronezh, Russia

    I. V. Izvekova

  4. Zhukovsky and Gagarin Air Force Academy, 394064, Voronezh, Russia

    I. A. Safonov

Authors
  1. A. A. Grebennikov
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  2. A. I. Bocharov
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  3. S. B. Kushchev
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  4. D. V. Serikov
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  5. A. V. Kostyuchenko
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  6. E. N. Fedorova
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  7. I. V. Izvekova
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  8. I. A. Safonov
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Corresponding authors

Correspondence to A. A. Grebennikov, A. I. Bocharov, S. B. Kushchev, D. V. Serikov, A. V. Kostyuchenko, E. N. Fedorova, I. V. Izvekova or I. A. Safonov.

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Translated by O. Polyakov

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Grebennikov, A.A., Bocharov, A.I., Kushchev, S.B. et al. Effect of Pulsed Photon Treatment on Electrophysical and Thermophysical Properties of n-Type Solid Solution Based on Bi2Te3–Bi2Se3: I. Electrophysical Properties. Inorg. Mater. Appl. Res. 11, 526–530 (2020). https://doi.org/10.1134/S2075113320030144

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  • DOI: https://doi.org/10.1134/S2075113320030144

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