The effect of carrier conduction between main chains on thermoelectric properties of polythiophene

Y. Shinohara, Y. Isoda, Y. Imai, K. Hiraishi, H. Oikawa, H. Nakanishi

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

    6 Citations (Scopus)

    Abstract

    Polythiophene films were synthesized by electrolytic polymerization using nitrobenzene as a solvent and tetra-n-butylammonium perchrorate as an electrolyte. We have evaluated thermoelectric properties of Seebeck coefficient, electrical conductivity, hall mobility and career concentration of the films in the in-plane direction. The films showed a tendency that Seebeck coefficient decreased with an increasing electrical conductivity. The figure-of-merit was calculated assuming the thermal conductivity was 0.1W/Km. The figure-of-merit increased with an increasing electrical conductivity up to 1.5×10 -4/K. The electrical conductivity was mainly changed with Hall mobility, which was related to molecular spacing of the mains chains. Variable range hopping was a determining process of carrier conduction. The easiness of carrier conduction between main chain molecules directly affected the figure-of-merit of the polythiophene polymers.

    Original languageEnglish
    Title of host publicationProceedings ICT'07 - 26th International Conference on Thermoelectrics
    Pages405-407
    Number of pages3
    DOIs
    Publication statusPublished - 2007
    EventICT'07 - 26th International Conference on Thermoelectrics - Jeju, Korea, Republic of
    Duration: 2007 Jun 32007 Jun 7

    Publication series

    NameInternational Conference on Thermoelectrics, ICT, Proceedings

    Other

    OtherICT'07 - 26th International Conference on Thermoelectrics
    Country/TerritoryKorea, Republic of
    CityJeju
    Period07/6/307/6/7

    ASJC Scopus subject areas

    • Engineering(all)

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