Metallic electrical transport of pf6-doped polypyrrole : Dc conductivity and thermoelectric power
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- Metallic electrical transport of pf6-doped polypyrrole : Dc conductivity and thermoelectric power
- Lee, WP; Park, YW; Choi, YunSeok
- Conductivity; Thermopower; Polypyrrole and derivatives
- Issue Date
- ELSEVIER SCIENCE SA
- SYNTHETIC METALS, v.84, no.1-3, pp.841 - 842
- We have measured the temperature dependence of conductivity and thermoelectric power of PF6-doped polypyrrole. The sample was electrochemically synthesized at −40 °C. The temperature coefficient of the conductivity changes the sign at T = 17 K where the conductivity becomes minimum. Thermoelectric power (TEP) measurement shows linear temperature dependence from room temperature down to 50 K characteristic to that of broad band metals, but a positive hump below 50 K is observed. Possibilities of the phonon drag effect due to the better crystallinity of the sample and/or the electron-phonon interaction in a disordered metallic state are discussed to understand the positive hump of TEP.
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