Thermoelectric Investigation of the Pseudo Binary System PbTe–CoSe2

V. Ponnambalam, Donald T. Morelli

    Research output: Contribution to journalArticle

    • 2 Citations

    Abstract

    Composites of nominal composition (Pb0.98Na0.02Te)1−y(CoSe2)y and (Pb0.95Na0.05Te)1−y(CoSe2)y with y = 0.05–0.15 have been synthesized to study their thermoelectric properties. In these composites CoTe2 is the secondary phase. The room temperature carrier concentration covers a wide range, 0.5–3.3 × 1020/cm3 depending on the composition. The high-temperature thermoelectric properties are similar to those of Na-doped Pb(Te,Se) alloys. The Seebeck coefficient can be as high as ~250 μV/K when the electrical resistivity is approximately 3.5 mΩ cm. The thermal conductivity of all the composites are very low. The CoTe2 seems to have little effect on the transport properties. The highest ZT achieved is ~1.2.

    Original languageEnglish (US)
    Pages (from-to)2089-2094
    Number of pages6
    JournalJournal of Electronic Materials
    Volume44
    Issue number6
    DOIs
    StatePublished - Jun 1 2015

    Profile

    Composite materials
    composite materials
    Acetanilides
    African horse sickness virus
    Chemical analysis
    Temperature
    Joint Loose Bodies
    Seebeck coefficient
    alpha-Fetoproteins
    Carrier concentration
    Transport properties
    Thermal conductivity
    Seebeck effect
    thermal conductivity
    transport properties
    electrical resistivity
    room temperature

    Keywords

    • cobalt selenide
    • electrical resistivity
    • Hall coefficient
    • Lead telluride
    • Seebeck coefficient
    • thermoelectric properties

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Materials Chemistry

    Cite this

    Thermoelectric Investigation of the Pseudo Binary System PbTe–CoSe2 . / Ponnambalam, V.; Morelli, Donald T.

    In: Journal of Electronic Materials, Vol. 44, No. 6, 01.06.2015, p. 2089-2094.

    Research output: Contribution to journalArticle

    Ponnambalam, V.; Morelli, Donald T. / Thermoelectric Investigation of the Pseudo Binary System PbTe–CoSe2 .

    In: Journal of Electronic Materials, Vol. 44, No. 6, 01.06.2015, p. 2089-2094.

    Research output: Contribution to journalArticle

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    abstract = "Composites of nominal composition (Pb0.98Na0.02Te)1−y(CoSe2)y and (Pb0.95Na0.05Te)1−y(CoSe2)y with y = 0.05–0.15 have been synthesized to study their thermoelectric properties. In these composites CoTe2 is the secondary phase. The room temperature carrier concentration covers a wide range, 0.5–3.3 × 1020/cm3 depending on the composition. The high-temperature thermoelectric properties are similar to those of Na-doped Pb(Te,Se) alloys. The Seebeck coefficient can be as high as ~250 μV/K when the electrical resistivity is approximately 3.5 mΩ cm. The thermal conductivity of all the composites are very low. The CoTe2 seems to have little effect on the transport properties. The highest ZT achieved is ~1.2.",
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