Berlin 2008 – wissenschaftliches Programm
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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications
SYSA 5: Poster Session SYSA
SYSA 5.59: Poster
Dienstag, 26. Februar 2008, 14:30–20:00, Poster A
Soft X-ray scanning transmission spectromicroscopy of diindenoperylene thin films — •Maria Benedetta Casu1, Indro Biswas1, George Tzvetkov2,3, Jörg Raabe3, and Thomas Chassé1 — 1Institute of Physical and Theoretical Chemistry, University of Tuebingen, 72076 Tübingen, Germany — 2Physikalische Chemie II, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 3Swiss Light Source, PSI, 5232 Villingen, Switzerland
Organic materials have been extensively investigated in the recent decades. They were considered very appealing not only because of a pure academic interest as a new class of materials but also because of their promising properties toward the electronic applications. Nowadays we can surely affirm that these materials kept their promise. Diindenoperylene is a perylene-based molecule that shows a very high hole mobility already in thin films, good film forming properties and thermal stability. Thus it may be promising as active layer in devices. In this work we present the results of scanning transmission X-ray microscopy (STXM) investigations on diindenoperylene thin films deposited on polycrystalline gold. STXM is a powerful technique that takes advantage from the use of synchrotron radiation, allowing the simultaneous investigation of structure, and electronic properties with excellent spatial resolution. Our STXM images together with nano near-edge X-ray absorption fine structure spectra (both taken at the C 1s edge) show that different electronic structure domains occur depending on different sample thicknesses. The implications of this finding will be discussed also in terms of growth of organic materials.