Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Organic/bio Molecules on Metal Surfaces III

O 27.5: Vortrag

Dienstag, 1. April 2014, 11:30–11:45, TRE Phy

NTCDA and CuPc heteroorganic phases on Ag (111) — •Sonja Schröder, Benjamin Stadtmüller, Francois C. Bocquet, Caroline Henneke, Christoph Kleimann, Serguei Soubatch, Frank Stefan Tautz, and Christian Kumpf — Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, Germany and Jülich Aachen Research Alliance Fundamentals of Future Information Technology, Jülich, Germany

While in the last decade most studies of organic adsorbates on metal surfaces concentrated on homomolecular systems, recently also heteromolecular thin films moved into the focus of interest. In particular, acceptor-donator systems have considerable potential for future organic devices. Here we report on the heteroorganic system NTCDA and CuPc on Ag(111). In comparison to the system PTCDA+CuPc/Ag(111) investigated earlier [1], the acceptor strength of the charge accepting molecule is weakened by replacing PTCDA by NTCDA. We have investigated the consequences of this manipulation by means of SPA-LEED, NIXSW, UPS and ARPES. As for the PTCDA-CuPc system three mixed structures with different stoichiometric ratios were found: A NTCDA-rich, a *1:1*, and a CuPc-rich phase. In this presentation we concentrate on the lateral and vertical structure formation and show some results from our electron spectroscopic investigations. [1] B. Stadtmüller, D. Lüftner, M. Willenbockel, E.M. Reinisch, T .Sueyoshi, G. Koller, S. Soubatch, M.G. Ramsey, P. Puschnig, F.S .Tautz, C .Kumpf, to be published.