Abstract
Systematic investigations of the temperature-dependence (4K–300K) of the DC conductivity of polyacetylene doped with various species are reported. Additional microwave conductivity measurements in the range from liquid helium temperature to room temperature reveal that the observed behaviour is a superposition of different conduction mechanisms. At low doping levels, carrier hopping among localized states is dominating, while in heavily doped samples only the interfibrillar contact resistances are relevant. In an intermediate concentration region, the most important contribution to the conductivity is carrier tunneling between highly conducting parts of the sample separated by less conducting zones. Our results show that conduction via mobile charged conjugational defects (solitons) does not play a detectable role at any doping levels.
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Ehinger, K., Roth, S. (1985). Non-Solitonic Transport Model for Polyacetylene. In: Kuzmany, H., Mehring, M., Roth, S. (eds) Electronic Properties of Polymers and Related Compounds. Springer Series in Solid-State Sciences, vol 63. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82569-9_11
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DOI: https://doi.org/10.1007/978-3-642-82569-9_11
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