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DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.70: Poster

Dienstag, 13. März 2018, 18:15–20:15, Poster B

FePc and FePcF₁₆ on Rutile: Influence of the defects and the crystal orientation on the interaction — •Reimer Karstens, David Balle, Axel Belser, Thomas Chassé, and Heiko Peisert — Institute of Physical and Theoretical Chemistry, Auf der Morgenstelle 18, 72076 Tuebingen, University of Tuebingen, Germany

Nowadays, organic semiconductor electronics are extensively investigated due to their electronic, magnetic, optical properties and their possible applications. Transition metal phthalocyanines (e.g. FePc) on rutile surfaces represent an important model system for organic semiconductor-oxide interfaces. Moreover, such interfaces are of high interest for applications, like dye-sensitized solar-cells. Our research focus lies on the influence of three parameters on the interface interaction: vacancies, crystal orientation and changed electronic properties by fluorination of the phthalocyanine molecule. Reconstructed rutile single crystal surfaces (TiO₂ (100)-(1× 3) and TiO₂ (110)-(1× 1)) are used, where the defect concentration is controlled by the oxygen amount during the annealing. The orientation of the phthalocyanine molecules and the interface interaction were investigated by photoemission and x-ray absorption spectroscopy. The interaction involves in particular the nitrogen atoms of the phthalocyanine. Clear differences are observed in the interaction for different TMPc molecules and defect concentrations.