Thermoelectric properties of poly (3,4-ethylenedioxy thiophene)/poly (sulfonic acid diphenyl aniline) composites synthesized in the absence and presence of magnetic field


UĞRAŞKAN V. , KARAMAN F.

MATERIALS RESEARCH EXPRESS, vol.7, no.1, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.1088/2053-1591/ab66f3
  • Title of Journal : MATERIALS RESEARCH EXPRESS
  • Keywords: PEDOT, PSDA, composite, magnetic field, PEDOT-PSS, CONDUCTIVE POLYMERS, ENHANCEMENT, FILMS, POLYMERIZATION, PERFORMANCE

Abstract

Poly(3,4-ethylenedioxy thiophene)/polysulfonic diphenyl aniline (PEDOT:PSDA) composites in the ratios of 1:0.5, 1:1, 1:1.5 and 1:2 were synthesized by oxidative chemical polymerization in the absence and presence of external constant magnetic field which the flux density is 3 kGa. The samples were characterized by UV-vis, FTIR-ATR and XRD. Their thermoelectric properties were obtained by means of electrical conductivities and Seebeck coefficients measurements. It was found that both the conductivity and Seebeck coefficients of the PEDOT:PSDA composites were increased in the presence of magnetic field. The conductivities of PEDOT:PSDA composites are lower whereas their Seebeck coefficients are considerably higher than that of commercial PEDOT:PSS. The highest power factor was obtained as 32 mu W m(-1)K(-2) for the composite PEDOTPSDA = 1:1 synthesized in the presence of magnetic field. The power factor of this sample was enhanced to 185 mu W m(-1)K(-2) by a secondary doping with sodium dodecyl benzene sulfonate.