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Charge-Transport in Partially-Ordered Regioregular Poly(3-Hexylthiophene) Studied as a Function of the Charge-carrier Density

Published online by Cambridge University Press:  21 March 2011

D.B.A. Rep ,
B.-H. Huisman ,
E.J. Meijer ,
P. Prins  and
T.M. Klapwijk
D.B.A. Rep
Affiliation:
Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The, Netherlands
B.-H. Huisman
Affiliation:
Philips Research Laboratories, Professor Holstlaan 4, 5656 AA Eindhoven, The, Netherlands
E.J. Meijer
Affiliation:
Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The, Netherlands Philips Research Laboratories, Professor Holstlaan 4, 5656 AA Eindhoven, The, Netherlands
P. Prins
Affiliation:
Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The, Netherlands
T.M. Klapwijk
Affiliation:
Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The, Netherlands
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Abstract

We demonstrate that charge-transport in partially-ordered thin films of poly(3- hexylthiophene) is strongly dependent on the charge-carrier density in the film, which we relate to the localized nature of the charge carriers. We base our conclusions on measurements in which the charge-carrier density is varied by electrostatic means (in a transistor geometry) and by in- situ thermal removal of oxygen dopants. For the doping levels investigated, we argue that the removal of oxygen does not induce structural changes in the conjugated polymer, and that it only shifts the Fermi-level of the film.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 660: Symposia JJ – Organic Electronic & Photonic Materials and Devices , 2000 , JJ7.9
Copyright
Copyright © Materials Research Society 2001

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References

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