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O: Fachverband Oberflächenphysik
O 6: Semiconductor substrates: Adsorption
O 6.5: Talk
Monday, March 14, 2011, 12:15–12:30, WIL B122
Adsorption of small organic ring molecules on GaP(001)(2x4) — •Marcel Ewald1,2, Johannes Falkenburg1,2, Michael Kneissl1, Norbert Esser2, and Patrick Vogt1 — 1Technische Universität Berlin, Institut für Festkörperphysik, Hardenbergstr. 36, 10623 Berlin — 2Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Department Berlin, Albert-Einstein-Str. 9, 12489 Berlin
For the application of organic/semiconductor interfaces, in particular of III-V compounds, the interface atomic formation and structure are crucially important. We have investigated the binding configuration and binding structure of small organic ring molecules like cyclopentene, pyrridazine and pyrrole on the GaP(001)(2x4) surface reconstruction. The molecule terminated samples were analysed by low energy electron diffraction (LEED), Xray photoemission spectroscopy (XPS) and reflectance anisotropy spectroscopy (RAS) in a spectral range from 1.5eV to 8.5eV. We found, that the different molecules lead to different contributions within the optical anisotropy between 6-8eV resulting from the different electronic properties of the molecules. Numerical analysis of the C1s core level indicates different adsorption geometries of molecule and the GaP(001)(2x4) surface.