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Metallic electrical transport of pf6-doped polypyrrole : Dc conductivity and thermoelectric power

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Title
Metallic electrical transport of pf6-doped polypyrrole : Dc conductivity and thermoelectric power
Author
Lee, WPPark, YWChoi, YunSeok
Keywords
Conductivity;  Thermopower;  Polypyrrole and derivatives
Issue Date
199701
Publisher
ELSEVIER SCIENCE SA
Citation
SYNTHETIC METALS, v.84, no.1-3, pp.841 - 842
Abstract
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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DOI
http://dx.doi.org/10.1016/S0379-6779(96)04174-4
ISSN
0379-6779
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ECHE_Journal Papers
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