Thermoelectric properties of Bi0.5Sb1.5Te3/C60 nanocomposites

V.D. Blank, S.G. Buga, V.A. Kulbachinskii, V.G. Kytin, Viacheslav Medvedev, Y.M. Popov, P.B. Stepanov, V.F. Skok

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)

Abstract

A thermoelectric nanocomposite of Bi0.5Sb1.5Te3 with the C60 fullerene molecules has been synthesized and studied. The fullerene molecules provide the phonons blocking, reducing the lattice thermal conductivity. The reduction of the electrical conductivity is much less than the heat conductivity reduction at a low fullerene content. Therefore, the thermoelectric figure of merit increases up to 25% at 305 K. The thermoelectric properties of the synthesized materials have been analyzed theoretically in the frame of the Boltzmann equation approach. The calculations predict the optimal carrier concentration and C60 content for a maximal value of the thermoelectric figure of merit in a wide temperature range.
Original languageEnglish
Pages (from-to)075426-1-075426-8
Number of pages8
JournalPhysical review B: Condensed matter and materials physics
Volume86
Issue number7
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-298219
  • IR-100025

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