Transport properties and thermoelectric performance of (Zn1-yMgy)1-xAlxO

Toshiki Tsubota, Michitaka Ohtaki, Koichi Eguchi, Hiromichi Arai

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    71 Citations (Scopus)

    Abstract

    Addition of MgO to Al-doped ZnO was successful in reduction of the phonon thermal conductivity, κph, in order to suppress the unfavorably high thermal conductivity, κ, of the material in terms of applications to thermoelectric conversion. The electrical conductivity, σ, of Zn0.98Al0.02O decreased with increasing amount of the added MgO, whereas the Seebeck coefficient was virtually unchanged up to (Zn0.9Mg0.1)0.98Al0.02O. Further Al2O3 doping was ineffective in improving σ. The carrier mobility decreased with increasing amount of the added MgO but was independent of the extent of the Al doping. In spite of the significant suppression of κ, the figure of merit was smaller for the MgO-added samples because of the marked decrease of σ.

    Original languageEnglish
    Pages (from-to)409-412
    Number of pages4
    JournalJournal of Materials Chemistry
    Volume8
    Issue number2
    DOIs
    Publication statusPublished - Jan 1 1998

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Materials Chemistry

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