Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 62: Posters: Surface Reactions and Dynamics, Nanostructures

O 62.25: Poster

Mittwoch, 2. April 2014, 17:30–21:00, P1

Initial growth of heteromolecular layers studied by LEEM — •Caroline Henneke, Daniel Schwarz, Jonas van Bebber, and Christian Kumpf — Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany, and Jülich Aachen Reseach Alliance (JARA)-Fundamentals of Future Information Technology

One crucial issue for the performance of organic materials in electronic devices is the ability to specifically design the interfaces between different active layers according to their functional purpose. Heteromolecular films are of highest interest in this context, in particular their initial growth and the structure formation of the first molecular layer since this layer acts as a template for further growth.

We have investigated a prototypical donor-acceptor system containing copper-II-phthalocyanine (CuPc) and 3,4,9,10-perylen-tetracarboxylic-acid dianhydride (PTCDA) molecules adsorbed in mixed films on low-index noble metal surfaces. Kinetic processes like thin film growth, the formation of the organic mixed layer, and the transitions between different phases were studied in real time with LEEM. The lateral structure of the different phases was investigated with LEED.