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DS: Fachverband Dünne Schichten
DS 39: Poster Session II
DS 39.12: Poster
Donnerstag, 19. März 2015, 16:00–18:30, Poster F
Real-time observation of superlattice formation in co-evaporated binary mixtures of Picene and Perfluoropentacene — •Johannes Dieterle1, Katharina Broch2, Alexander Hinderhofer1, Heiko Frank1, Jiri Novak3, Rupak Banerjee1, Alexander Gerlach1, and Frank Schreiber1 — 1Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen — 2Cavendish Laboratory, University of Cambridge, Cambridge, UK — 3Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
Studies of the mixing and ordering behaviour of binary organic semiconductor blends are not only relevant for applications, where blends are often used as the active layer, but also interesting for fundamental research, as new, mixing induced, ordering schemes may evolve [1,2]. For a detailed understanding of the mechanisms of structure formation during growth of binary blends, controlled growth and full structural characterization is crucial. For binary blends of Picene (C22H14) (’high gap’) and Perfuoropentacene (C22F14) (’low gap’) we observe the formation of a superlattice during co-evaporation. To study the dynamics of the superlattice formation and possible transient effects we perform real-time x-ray scattering and optical spectroscopy during growth of the blends.
[1] A. Hinderhofer and F. Schreiber, ChemPhysChem 13, 628 (2012) [2] A. Aufderheide et al., Phys. Rev. Lett. 109, 156102 (2012)