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Temperature Dependence of the Electrical Conductivity of Poly(Benzo[1,2-b:4,5-b'] Dithiophene-4,8-Diyl Vinylene) and Poly(Dodecylthiophene)

Published online by Cambridge University Press:  10 February 2011

R. C Hyer ,
R. G. Pethe ,
T. Yogi ,
S. C. Sharma ,
J. Wang ,
R. L. Meline ,
R. L. Elsenbaumer  and
R. C. McCullough
R. C Hyer
Affiliation:
Dept. of Physics, Martin Pomerantz
R. G. Pethe
Affiliation:
Dept. of Physics, Martin Pomerantz
T. Yogi
Affiliation:
Dept. of Physics, Martin Pomerantz
S. C. Sharma
Affiliation:
Dept. of Physics, Martin Pomerantz
J. Wang
Affiliation:
Dept. of Chemistry & Biochemistry, University of Texas at Arlington, Arlington, TX 76019Dept. of Chemistry, Carnegie Mellon University, Pittsburg, PA.
R. L. Meline
Affiliation:
Dept. of Chemistry & Biochemistry, University of Texas at Arlington, Arlington, TX 76019Dept. of Chemistry, Carnegie Mellon University, Pittsburg, PA.
R. L. Elsenbaumer
Affiliation:
Dept. of Chemistry & Biochemistry, University of Texas at Arlington, Arlington, TX 76019Dept. of Chemistry, Carnegie Mellon University, Pittsburg, PA.
R. C. McCullough
Affiliation:
Dept. of Chemistry & Biochemistry, University of Texas at Arlington, Arlington, TX 76019Dept. of Chemistry, Carnegie Mellon University, Pittsburg, PA.
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Abstract

We present results for the electrical conductivity (σ) of thin films of poly(benzo[1,2-b:4,5- b']dithiophene-4,8-diyl vinylene) (PBDV) and poly (dodecylthiophene) (PDDT) as a function of temperature in the range 15-295K. The polymers were doped with FeC13 and PF6 which resulted in electrical conductivities differing by two orders of magnitude at room temperature. We examine three sets of σ(T)-data by using the variable-range hopping (VRH) model that predicts a linear relationship between ln(T1/2σ) and T1/4. We observe a change in the slope of the ln(T1/2σ) vs T14 relationship in all three samples at low temperatures. We also analyze the temperature dependence of the resistivity of PBDV by using the thermal fluctuation-induced tunneling model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 701
Copyright
Copyright © Materials Research Society 1998

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