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Exciton properties of selected aromatic hydrocarbon systems

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Abstract

We have examined the singlet excitons in two representatives of acene-type (tetracene and pentacene) and phenacene-type (chrysene and picene) molecular crystals, respectively, using electron energy-loss spectroscopy at low temperatures. We show that the excitation spectra of the two hydrocarbon families significantly differ. Moreover, close inspection of the data indicates that there is an increasing importance of charge-transfer excitons at lowest excitation energy with increasing length of the molecules.

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Authors and Affiliations

  1. IFW Dresden, P.O. Box 270116, 01171, Dresden, Germany

    Friedrich Roth, Benjamin Mahns, Silke Hampel, Markus Nohr, Bernd Büchner & Martin Knupfer

  2. Institute of Physics of Complex Matter, Ecole Polytechnique Federale de Lausanne (EPFL), 1015, Lausanne, Switzerland

    Helmuth Berger

  3. Institut für Festkörperphysik, Technische Universität Dresden, 01062, Dresden, Germany

    Bernd Büchner

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  1. Friedrich Roth
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  2. Benjamin Mahns
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  3. Silke Hampel
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  6. Bernd Büchner
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  7. Martin Knupfer
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Correspondence to Friedrich Roth.

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Roth, F., Mahns, B., Hampel, S. et al. Exciton properties of selected aromatic hydrocarbon systems. Eur. Phys. J. B 86, 66 (2013). https://doi.org/10.1140/epjb/e2012-30592-1

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