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In situ conductivity measurements of polythiophene partially containing 3,4-ethylenedioxythiophene and 3-hexylthiophene

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Abstract

Optical and electrochemical properties of a novel polythiophene partially containing 3,4-ethylenedioxythiophene (EDOT), poly(3,3″″-dihexyl-3′,4′,3‴,4‴-diethylenedioxy-2,2′:5′,2″:5″,2‴:5‴,2″″-quinquethiophene), in a neutral state, which was synthesized by polycondensation using direct C-H coupling reaction, were firstly investigated. In situ electrical conductivity of the doped polymer film was measured simultaneously with doping levels at different potentials to yield charge carrier mobilities as a function of doping level of the polymer. The highest conductivity was found to be around 101 S cm−1, which is almost one-order higher than that of an EDOT-containing polythiophene obtained by electrolytic polymerization, poly(3″,4″-ethylenedioxy-2,2′:5′,2″-terthiophene).

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Acknowledgments

This work was supported in part by grants from the Hiroshima Bank (I.I.), the General Sekiyu Research & Development Encouragement & Assistance Foundation (I.I.), the TANAKA Holdings (I.I.), and grants-in-aid for scientific research from the Japan Society for the Promotion of Science (JSPS) (no. 22550198, I.I. and no. 25288085, Y.H.).

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan

    Ichiro Imae, Takahiro Mashima, Hitoshi Sagawa, Kenji Komaguchi, Yousuke Ooyama & Yutaka Harima

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  1. Ichiro Imae
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  2. Takahiro Mashima
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  3. Hitoshi Sagawa
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  4. Kenji Komaguchi
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  5. Yousuke Ooyama
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  6. Yutaka Harima
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Correspondence to Ichiro Imae or Yutaka Harima.

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Dedicated to the memory of Professor Dr. Lothar Dunsch, a caring mentor and a good friend (Yutaka, Ichiro, Yousuke, Kenji).

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Imae, I., Mashima, T., Sagawa, H. et al. In situ conductivity measurements of polythiophene partially containing 3,4-ethylenedioxythiophene and 3-hexylthiophene. J Solid State Electrochem 19, 71–76 (2015). https://doi.org/10.1007/s10008-014-2579-8

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  • DOI: https://doi.org/10.1007/s10008-014-2579-8

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