Thermoelectric properties of oxide solid solutions based on Al-doped ZnO

Michitaka Ohtaki, Toshiki Tsubota, Koichi Eguchi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    19 Citations (Scopus)

    Abstract

    Investigation on thermoelectric properties of oxide solid solutions based on Zn0.98Al0.02O revealed that the thermal conductivity of Al-doped ZnO was markedly suppressed via formation of solid solution, particularly for those with MgO. The decrease in the thermal conductivity was significant at the lower temperatures, and at room temperature, (Zn0.9Mg0.1)0.98Al0.02O attained a value less than a quarter of that for Zn0.98Al0.02O. However, the electrical conductivity also decreased, while the Seebeck coefficients almost unchanged. The Hall measurements revealed reduction in both the carrier concentration and the Hall mobility for the solid solution samples. In spite of the significant suppression of the thermal conductivity, improvement in the figure of merit was unsuccessful for the MgO-doped samples because of the unfavorable decrease in the electrical conductivity.

    Original languageEnglish
    Title of host publicationInternational Conference on Thermoelectrics, ICT, Proceedings
    Editors Anon
    PublisherIEEE
    Pages610-613
    Number of pages4
    Publication statusPublished - 1998
    EventProceedings of the 1998 17th International Conference on Thermoelectrics, ICT - Nagoya, Jpn
    Duration: May 24 1998May 28 1998

    Other

    OtherProceedings of the 1998 17th International Conference on Thermoelectrics, ICT
    CityNagoya, Jpn
    Period5/24/985/28/98

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    All Science Journal Classification (ASJC) codes

    • Engineering(all)

    Cite this

    Ohtaki, M., Tsubota, T., & Eguchi, K. (1998). Thermoelectric properties of oxide solid solutions based on Al-doped ZnO. In Anon (Ed.), International Conference on Thermoelectrics, ICT, Proceedings (pp. 610-613). IEEE.