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The Influence of Ordering on the Photoinduced Charge Transfer in Composites of Phenyl-type Substituted Polythiophenes with Methanofullerenes

Published online by Cambridge University Press:  21 March 2011

Christoph J. Brabec ,
Christoph Winder ,
Markus C. Scharber ,
N. Serdar Sariciftci ,
Mats R. Andersson ,
Olle Inganäs  and
Jan C. Hummelen
Christoph J. Brabec
Affiliation:
Christian Doppler Laboratory for Plastic Solar Cells, Johannes Kepler University Linz, A-4040AustriaTel.: +43 732 2468 766, Fax: +43 732 2468 770 Email : christoph.brabec@jk.uni-linz.ac.at
Christoph Winder
Affiliation:
Christian Doppler Laboratory for Plastic Solar Cells, Johannes Kepler University Linz, A-4040AustriaTel.: +43 732 2468 766, Fax: +43 732 2468 770 Email : christoph.brabec@jk.uni-linz.ac.at
Markus C. Scharber
Affiliation:
Christian Doppler Laboratory for Plastic Solar Cells, Johannes Kepler University Linz, A-4040AustriaTel.: +43 732 2468 766, Fax: +43 732 2468 770 Email : christoph.brabec@jk.uni-linz.ac.at
N. Serdar Sariciftci
Affiliation:
Christian Doppler Laboratory for Plastic Solar Cells, Johannes Kepler University Linz, A-4040AustriaTel.: +43 732 2468 766, Fax: +43 732 2468 770 Email : christoph.brabec@jk.uni-linz.ac.at
Mats R. Andersson
Affiliation:
Chalmers University of Technology, Department of Polymer Technology and Organic Chemistry, Gothenburg, Sweden
Olle Inganäs
Affiliation:
University of Linköping, Laboratory of Applied Physics, Linköping, Sweden
Jan C. Hummelen
Affiliation:
Stratingh Institute and Materials Science Center, University of Groningen, 9747 AG Groningen, The Netherlands
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Abstract

Regioregular polythiophenes baring 3-(p-methoxyethoxyethoxy)-phenyl substituents (PEOPT) show high photoluminescence efficiencies. Exposing thin films of this polymer to vapors of chloroform or annealing them by heat treatment results in a red shift of the absorption maximum due to solvent or heat induced ordering which gives rise to more planar conformations. The fact, that annealed thin films of PEOPT exhibit absorption edges at relatively low energies and thus have an enhanced spectral range makes them suitable for use in photodiodes / solar cells. The photoinduced charge generation efficiency in PEOPT is significantly enhanced by the addition of a strong electron acceptor like fullerene, as observed by quenching of the luminescence and by photoinduced absorption measurements in the infrared and UV-Vis regime. The efficiency of the photoinduced charge transfer from PEOPT to a methanofullerene is found to depend on the ordering of PEOPT in thin films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 598: Symposium BB – Electrical, Optical, & Magenetic Properties...V , 1999 , BB3.24
Copyright
Copyright © Materials Research Society 1999

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