Observation of Two-Exciton States in Perylene Bisimide Aggregates
1 Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock, Germany
2 Institut für Organische Chemie and Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, Würzburg, Germany
The behavior of excitons on perylene bisimide aggregates is investigated at high excitation densities by femtosecond absorption spectroscopy. Indications for a significant population in the two-exciton manifold are found.
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