| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1521570 | Materials Chemistry and Physics | 2015 | 6 Pages |
•The conductive PEDOT:PSS-filled carbon black composites are investigated.•Second dopant has a significant effect on the electrical conductivity of composites.•A slight influence of second dopant is found on thermopower of composites.•Dimethyl sulfoxide doped composite presents the largest power factor.
The electrical conductivity and thermopower of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) filled carbon black (CB) were investigated with dimethyl sulfoxide, ethylene glycol, and 1-butyl-3-methylimidazolium tetrafluoroborate as second dopants. The electrical conductivity (608 S m−1) and thermopower (6.0 μV K−1) of PEDOT:PSS-filled CB increased three and six times over pure CB, respectively. Dimethyl sulfoxide exhibits a better effect on the enhancement of electrical conductivity (2034 S m−1), while 1-butyl-3-methylimidazolium tetrafluoroborate has a greater influence on thermopower (8.3 μV K−1) of PEDOT:PSS-filled CB. Electrical conductivity and thermopower depend on second dopant contents and 30 vol.% dopants gain the highest power factor (0.75–0.10 μW m−1 K−2) for PEDOT:PSS-filled CB based on electrical conductivity and thermopower. The second dopants represent a great effect on the electrical conductivity of PEDOT:PSS-filled CB, but less influence on thermopower.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
