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DS: Fachverband Dünne Schichten
DS 39: Poster Session II
DS 39.1: Poster
Donnerstag, 19. März 2015, 16:00–18:30, Poster F
Charge transfer effects in binary mixtures of organic semiconductors: DIP:F6-TCNNQ as a case study — •Giuliano Duva1, Valentina Belova1, Alexander Hinderhofer1, Alexander Gerlach1, Andreas Opitz2, Paul Beyer2, and Frank Schreiber1 — 1Universität Tübingen, Institut für Angewandte Physik, Auf der Morgenstelle 10, 72076 Tübingen (Germany) — 2Humboldt-Universität zu Berlin, Department of Physics, Brook-Taylor-Str. 6, 12489 Berlin (Germany)
Binary mixtures of organic semiconductors have been studied in planar and bulk heterojunction architectures [1], and a correlation between the structural and optical properties has been found [2]. The orientation of the molecular components of donor-acceptor type binary mixtures has been recently shown to have a dramatic impact on charge-transfer efficiency [3]. However, charge transfer effects in donor-acceptor organic systems have not been fully understood yet. We use several experimental techniques to characterize the structure and molecular orientation and identify charge-transfer effects within systems of DIP as the donor and F6-TCNNQ as the acceptor, namely in bulk heterojunction architecture. Remarkably, charge transfer effects studied by means of IR spectroscopy, UV-vis and spectroscopic ellipsometry, and PL are related to structural properties of the films obtained by means of XRR and GIXD together with morphological characterization by means of AFM. [1]A. Hinderhofer and F. Schreiber, Chem. Phys. Chem. 13 (2012);[2]K. Broch et al., J. Chem. Phys. 139 (2013);[3]G. Aghamohammadi et al., J. Phys. Chem. C 118 (2014).