Thermoelectric properties and conduction mechanism of conductive polythiophenes

Yoshikazu Shinohara, Yukihiro Isoda, Kentaro Hiraishi, Akito Masuhara, Hidetoshi Oikawa

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this study, we synthesised conductive polymers of polythiophene series and evaluated their thermoelectric properties in the temperature range from 88 K to 350 K. Poly-hexylthiophenes showed a conduction mechanism of the nearest-neighbour distance hopping (NDH) in the measured temperature range, while the main conduction mechanism of polythiophenes was the variable range hopping (VRH). Only polythiophenes with low electrical conductivity (such as 0.02 S/cm) presented NDH at temperatures of below 200 K. The conduction mechanism is changed by the distance between the thiophene main chains and the kinetic energy of carriers.

    Original languageEnglish
    Pages (from-to)66-73
    Number of pages8
    JournalInternational Journal of Materials and Product Technology
    Volume42
    Issue number1-2
    DOIs
    Publication statusPublished - 2011 Jan

    Keywords

    • Conduction mechanism
    • Conductive polymer
    • Thermoelectric material

    ASJC Scopus subject areas

    • Safety, Risk, Reliability and Quality
    • Mechanics of Materials
    • Mechanical Engineering
    • Industrial and Manufacturing Engineering

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