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DS: Fachverband Dünne Schichten

DS 29: Poster: Molecular Spintronics, Biomolecular and Functional Organic Layers, Organic Electronics and Photovoltaics, Plasmonics and Nanophotonics, Organic Thin Films, Nanoengineered Thin Films, Thin Film Characterisation,

DS 29.11: Poster

Mittwoch, 24. März 2010, 15:00–17:30, Poster A

Growth and Structure of tetrazine based organic thin films — •Dominik Meyer¹, Philip Schulz¹, Martin Reininghaus¹, Pierre Audebert², and Matthias Wuttig¹ — ¹Institute of Physics (IA), RWTH Aachen University of Technology, 52056 Aachen, Germany — ²PPSM (CNRS UMR 8531), Ecole Normale Supérieure de Cachan, 61, avenue de Président Wilson, 94235 Cachan Cedex, France

In semiconductor and sensor technology, a variety of organic molecules have been explored for optoelectronic applications such as organic LEDs or TFTs. Tetrazines are aromatic molecules, which are comprised of a benzene ring where four carbon atoms are replaced by nitrogen, leading to an electron--poor delocalized electronic system that provides a high electron affinity. This structure may provide very interesting properties, i. e. luminescence and reversible electroactivity, thus rendering these molecules promising for use in sensor applications [1].

In this study we investigate the structural properties of tetrazine thin films, evaporated under high vacuum conditions on Au(111) substrates. X-ray Diffraction and Fourier transformed infrared spectroscopy been employed to explore the growth of the deposited organic layer. In order to describe the recorded IR spectra and conclude on the molecular orientation density functional theory calculations were performed. By tuning deposition parameters and surface conditions of the underlying substrate, we were able to realize different growth scenarios and tailor the film perfection with respect to the structural ordering.

[1] Kim, Y.; Kim, E.; Clavier, G.; Audebert, P. Chem. Commun., 2006, 3612--3614