Dresden 2011 – scientific programme

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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.47: Poster

Wednesday, March 16, 2011, 15:00–17:30, P1

Structure and optical properties of binary co-evaporated organic thin films: Diindenoperylene and Perfluoropentacene — •Jens Reinhardt, Alexander Hinderhofer, Katharina Broch, Ute Heinemeyer, Alexander Gerlach, and Frank Schreiber — Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany

The structural and optical properties of co-evaporated thin films of diindenoperylene¹ (DIP) and perfluoropentacene² (PFP) on SiO₂ and glass-substrates were studied using x-ray reflectivity, grazing incidence x-ray diffraction, differential reflection spectroscopy (DRS), and absorption spectroscopy. The x-ray data reveal the coexistence of at least one molecular mixed DIP:PFP phase distinct from the pure DIP and PFP thin film phases. In addition the absorption and DRS spectra of the mixture cannot be described by a superposition of the single-component spectra which is attributed to different intermolecular coupling. A systematic variation of growth parameters (substrate temperature: 300 - 360 K; thickness: 5 - 40 nm) and their effect on phase mixing/separation will be discussed.

[1] U. Heinemeyer et al., Phys. Rev. B, 78 (2008) 085210

[2] A. Hinderhofer et al., J. Chem. Phys., 127 (2007) 194705