Influence of doping and solid solution formation on the thermoelectric properties of chalcopyrite semiconductors

Winston D. Carr, Donald T. Morelli

    Research output: Contribution to journalArticle

    • 13 Citations

    Abstract

    We have investigated the influence of zinc doping on the thermoelectric properties of CuInTe2-CuGaTe2 solid solution alloys. Undoped end-member compounds display typical p-type semiconducting behavior, with a negative temperature coefficient of resistivity and large Seebeck coefficient. With zinc substituting for indium or gallium, the hole concentration is increased and the electrical transport behavior evolves into that of a degenerate semiconductor, with both electrical resistivity and Seebeck coefficient increasing with temperature up to the highest temperature measured. For undoped samples the thermoelectric power factor is maximized close to 750 K, while in doped specimens the maximum occurs at much lower temperature. Substitution of gallium for indium induces significant phonon scattering and thermal conductivity reduction below 500 K. The dimensionless figure of merit rises to above unity over a range of compositions in these chalcopyrite compounds, with optimized samples reaching a figure of merit of 1.3.

    Original languageEnglish (US)
    Pages (from-to)277-281
    Number of pages5
    JournalJournal of Alloys and Compounds
    Volume630
    DOIs
    StatePublished - May 5 2015

    Profile

    Temperature
    Acetanilides
    Seebeck coefficient
    Gallium
    Indium
    Solid solutions
    Zinc
    Semiconductor materials
    Adrenergic beta-Agonists
    Negative temperature coefficient
    Hole concentration
    Phonon scattering
    Thermoelectric power
    Thermal conductivity
    Substitution reactions
    Chemical analysis
    Joint Loose Bodies
    Parametritis
    African horse sickness virus
    Paroxysmal Dyspnea

    Keywords

    • Powder metallurgy
    • Semiconductors
    • Thermoelectric

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Chemistry
    • Metals and Alloys

    Cite this

    Influence of doping and solid solution formation on the thermoelectric properties of chalcopyrite semiconductors. / Carr, Winston D.; Morelli, Donald T.

    In: Journal of Alloys and Compounds, Vol. 630, 05.05.2015, p. 277-281.

    Research output: Contribution to journalArticle

    Carr, Winston D.; Morelli, Donald T. / Influence of doping and solid solution formation on the thermoelectric properties of chalcopyrite semiconductors.

    In: Journal of Alloys and Compounds, Vol. 630, 05.05.2015, p. 277-281.

    Research output: Contribution to journalArticle

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