Structure effect to thermoelectric properties of polythiophene synthesized by electrolytic polymerization

Kentaro Hiraishi, Hidetoshi Oikawa, Hitoshi Kasai, Akito Masuhara, Hachiro Nakanishi, Yoshikazu Shinohara, Shuji Okada

Research output: Contribution to conferencePaperpeer-review


Polythiophene films were synthesized by electrolytic polymerization using nitrobenzene as a solvent and tetra-π-butylammonium peichrorate as 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 tendency that Seebeck coefficient decreased with an increasing electrical conductivity. The Seebeck coefficient of potythiophene was larger than other conductive polymers. Electrical conductivity was strongly dependent on hall mobility. High conductivity was due to smooth surfaces, high compactness, and high crystallinity of monoclinic structure. In addition, the conductive mechanism was analyzed by measuring the temperature dependency of the electrical conductivity, and was evaluated the relation to the structure.

Original languageEnglish
Number of pages2
Publication statusPublished - 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sept 202005 Sept 22


Conference54th SPSJ Symposium on Macromolecules


  • Electrical conductivity
  • Electrolytic polymerization
  • Polythiophene
  • Seebeck coefficient
  • Thermoelectric material


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