Dresden 2011 – wissenschaftliches Programm

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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 42.38: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

IR-Spectroscopy on organic charge-transfer complexes — Sebastian Beck¹, •Milan Alt¹, Tobias Glaser¹, Akemi Tamanai¹, Diana Nanova¹, Michael Kröger², and Annemarie Pucci¹ — ¹Kirchhoff-Institut für Physik, Universität Heidelberg — ²InnovationLab GmbH, Heidelberg

In the ongoing development of organic electronic devices new materials with adjustable properties are needed, in order to meet different specific requirements. Prototypical examples are the CT-complexes, such as TTF-TCNQ and its derivates. We studied the optical properties of these CT-complexes in the whole infrared range (100 - 12000 cm⁻¹). The suggested linear relationship between the excitation energy of the C-N-stretching vibration of the acceptor TCNQ and the associated charge-transfer was verified. In addition to the vibronic excitations of the molecules also widely broadened absorption bands in the MIR and NIR were observed. These are attributed to electronic excitations and in the range of the HOMO-LUMO gap of the investigated complexes.