The influence of ordering on the photoinduced charge transfer in composites of phenyl-type substituted polythiophenes with methanofullerenes

Christoph J. Brabec, Christoph Winder, Markus Clark Scharber, Niyuzi Serdar Sariciftci, Mats R. Andersson, Olle W. Inganäs, Jan Cornelis Hummelen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

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.
Original languageEnglish
Title of host publicationSymposium BB – Electrical, Optical, & Magenetic Properties...V
PublisherCambridge University Press
PagesBB3.24.1-BB3.24.6
Number of pages6
Volume598
DOIs
Publication statusPublished - 1999
Externally publishedYes

Publication series

NameMRS Symposium Proceedings Series
PublisherCambridge University Press
ISSN (Print)0272-9172
ISSN (Electronic)1946-4274

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