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research article
Momentum dependence of the excitons in pentacene
We have carried out electron energy-loss investigations of the lowest singlet excitons in pentacene at 20 K. Our studies allow to determine the full exciton band structure in the a*, b* reciprocal lattice plane. The lowest singlet exciton can move coherently within this plane, and the resulting exciton dispersion is highly anisotropic. The analysis of the energetically following (satellite) features indicates a strong admixture of charge transfer excitations to the exciton wave function. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4723812]
Type
research article
Web of Science ID
WOS:000304818400050
Authors
Roth, Friedrich
•
Schuster, Roman
•
Koenig, Andreas
•
Knupfer, Martin
•
Berger, Helmuth
Publication date
2012
Published in
Volume
136
Issue
20
Article Number
204708
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
June 29, 2012
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