Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 28: Organic-Inorganic Systems I: PTCDA
O 28.5: Vortrag
Dienstag, 8. März 2016, 11:45–12:00, S054
Perlyene derivatives adsorbed on O-terminated ZnO. An X-ray standing wave study — •Antoni Franco-Cañellas1, Jens Niederhausen2, Alexander Hinderhofer1, Tien-Lin Lee3, Alexander Gerlach1, Norbert Koch2,4, and Frank Schreiber1 — 1Institut für Angewandte Physik, Universität Tübingen, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Germany — 3Diamond Light Source, UK — 4Institut für Physik, Humboldt-Universität zu Berlin, Germany
Adsorption-induced conformational changes of large organic molecules have been extensively studied in the past for metal-organic interfaces employing the X-ray standing wave (XSW) technique [1], which provides an element-specific measurement of the adsorption distance of the molecule. Here, we show that the same method can be applied to inorganic-organic semiconductor interfaces. In particular, perylene, PTCDA and PTCDI adsorbed on O-terminated ZnO were studied with XSW. Our results shed light on how the ZnO affects the adsorption geometry of the molecule and how different functional groups distort and modify the overall adsorption distance, which is crucial to properly understand the substrate-molecule energy-level alignment within the context of hybrid inorganic-organic systems for optoelectronic applications [2,3].
[1] A. Gerlach et al., in The Molecule-Metal Interface (eds N. Koch, N. Ueno and A. T. S. Wee), Wiley-VCH, Weinheim, Germany (2013).
[2] R. Schlesinger et al. Phys. Rev. B 2013, 87, 155311.
[3] M. Gruenewald et al. J. Phys. Chem. C 2015, 119, 4865.