Thermoelectric properties and conduction mechanism of conductive polythiophenes

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

Research output: Contribution to journalArticle


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
Issue number1-2
Publication statusPublished - 2011 Jan


  • 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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