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Exciton Dissociation In Doped Conjugated Polymers

Published online by Cambridge University Press:  15 February 2011

Vladimir I. Arkhipov ,
Paul Heremans ,
Evgenia V. Emelianova  and
Heinz Bässler
Vladimir I. Arkhipov
Affiliation:
IMEC, Kapeldreef 75, B-3001 Heverlee-Leuven, Belgium Darmstadt University of Technology, Institute of Material Science, Petersenstrasse 23, D-64281 Darmstadt, Germany
Paul Heremans
Affiliation:
IMEC, Kapeldreef 75, B-3001 Heverlee-Leuven, Belgium
Evgenia V. Emelianova
Affiliation:
Semiconductor Physics Laboratory, University of Leuven, Celestijnenlaan 200D, B-3001 Heverlee-Leuven, Belgium
Heinz Bässler
Affiliation:
Institute of Physical, Nuclear and Macromolecular Chemistry, Philipps University of Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany
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Abstract

A model of carrier photogeneration in doped conjugated polymers is formulated. The model suggests that dissociation of a relaxed exciton into a Coulombically bound geminate pair (GP) occurs at a charge transfer center that consists of a polymer chain and a nearby electron acceptor. Further dissociation of the GP into free carriers is facilitated either by the kinetic energy of the zero-point oscillation of the on-chain carrier at low dopant concentrations or by the interfacial potential barrier for geminate pair recombination in polymer/electron acceptor blends.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 771: Symposium L – Organic and Polymeric Materials and Devices , 2003 , L7.15
Copyright
Copyright © Materials Research Society 2003

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References

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