Berlin 2012 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 35: Organic thin films III: Monolayers and crystals
DS 35.7: Vortrag
Donnerstag, 29. März 2012, 19:15–19:30, H 2032
A comparative study of the absorption spectra of binary mixtures of organic semiconductors — •Katharina Broch1, Antje Aufderheide1, Jens Reinhardt1, Alexander Hinderhofer1, Christian Frank1, Falk Anger1, Reinhard Scholz2, Alexander Gerlach1, and Frank Schreiber1 — 1Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen — 2Technische Universität Dresden, Institut für Angewandte Photophysik, George-Bähr-Straße 1, 01069 Dresden
Mixtures of organic semiconductors can be used to increase the donor-acceptor interface in organic optoelectronic devices. However, the influence of molecular geometry and chemical structure on the mixing behaviour as well as on the optical properties is still not completely understood. We present a comparative study of binary mixtures of three organic semiconductors, i.e. pentacene (PEN), perfluoropentacene (PFP) and diindenoperylene (DIP), in different combinations [1,2]. Using spectroscopic ellipsometry we study the optical properties of the mixed films including possible intermolecular interactions. By comparing the spectroscopic results with detailed x-ray data [3,4], we discuss the influence of the mixing behaviour and structural properties on the absorption spectra of the intermixed films.
K. Broch et al., Phys. Rev B, 83, 245307 (2011).
[2] J. P. Reinhardt et al., in preparation
[3] A. Hinderhofer et al., J. Chem. Phys., 134, 104702 (2011).
[4] A. Aufderheide et al., in preparation