Regensburg 2013 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 31: Organic thin films II
DS 31.9: Vortrag
Donnerstag, 14. März 2013, 16:45–17:00, H8
Temperature dependent growth and dewetting behavior of tetraseleno-tetracene on Au(111) and Ag(111) studied by photoelectron spectroscopy — •Jens Niederhausen1, Steffen Duhm2,5, Christoph Bürker3, Qian Xin2,6, Andreas Wilke1, Antje Vollmer4, Frank Schreiber3, Satoshi Kera2, Nobuo Ueno2, and Norbert Koch1,4 — 1Humboldt-Universität zu Berlin, Institut für Physik, 12489 Berlin, Germany — 2Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan — 3Institut für Angewandte Physik, Universität Tübingen, 72076 Tübingen, Germany — 4Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, BESSY II, 12489 Berlin, Germany — 5Present address: FUNSOM, Soochow University, Suzhou, P. R. China — 6Present address: School of Physics and Microelectronics, Shandong University, 5 Hongjialou, Jinan, P. R. China
The organic donor tetraseleno-tetracene (TSeT) was vacuum deposited on Au(111) and Ag(111) with the substrates (i) at room temperature and (ii) at 77 K. For these two cases we find:
(i) High resolution X-ray photoelectron spectroscopy indicates strong chemisorption of the molecules on the metal surfaces, mitigated by the diselenide groups.
(ii) Fast dewetting of TSeT multilayers is observed for samples grown at 77 K as the temperature is gradually increased. Ultraviolet photoelectron spectroscopy measurements during sample annealing reveal that the concomitant morphological changes in the TSeT film have a significant effect on its electronic structure.