Thermoelectric properties of PEDOT/PSS films prepared by a Gel-film formation process

Ryota Maeda, Hiroshi Kawakami, Yoshikazu Shinohara, Ikuzo Kanazawa, Masaya Mitsuishi

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    We have developed a technique for fabricating films of the thermoelectric material, PEDOT/PSS, with enhanced thermoelectric properties via a gel-film formation process. The salient features of the process are 1) the absence of any commonly used pre- and post-treatment steps and 2) wide film thickness control. The new process is different from direct film-formation processes such as the spin-coating and drop-casting methods. The film thickness can be controlled in the range of 1 to 30 μm. In this study, we investigated the dependence of the electrical conductivity (σ) and Seebeck coefficient (S) on the film thickness (d). While the value of σ increased with decreasing d, S decreased slightly with decreasing d. By this process, values of σ=1070S/cm and S=16.0μV/K were achieved for d=1.1μm, using ethanol as the gelling solvent. Ethanol plays the important roles of removing excess PSS and inducing subsequent gelling.

    Original languageEnglish
    Pages (from-to)169-171
    Number of pages3
    JournalMaterials Letters
    Publication statusPublished - 2019 Sept 15


    • Conductive polymer
    • Novel film fabrication
    • Organic thermoelectric material

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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