Dresden 2014 – scientific programme

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DS: Fachverband Dünne Schichten

DS 18: Organic Thin Films I

DS 18.5: Talk

Wednesday, April 2, 2014, 10:30–10:45, CHE 91

Interfaces between cobalt phthalocyanine and epitaxially grown ultrathin MnO films: Evidence for charge transfer. — •Mathias Glaser¹, Heiko Peisert¹, Hilmar Adler¹, Umut Aygül¹, Milutin Ivanovic¹, Peter Nagel², Michael Merz², Stefan Schuppler², and Thomas Chassé¹ — ¹Universität Tübingen, Institut für Physikalische und Theoretische Chemie, Auf der Morgenstelle 18, 72076 Tübingen, Germany — ²Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany

The electronic properties of adsorbed transition metal phthalocyanines (TMPcs) on substrate surfaces are strongly affected by interactions at the interface [1,2]. Depending on the combination of the transition metal (TM) of the TMPc and the substrate, a charge transfer from the substrate to the TM may occur as observed, e.g. for CoPc/Ag(111) [2] and CoPc/Ni(111) [3]. Besides metals, transition metal oxide thin (TMO) films are promising substrates for applications of TMPcs - also in the view of a magnetic coupling between the molecules and the substrate. However, studies of these interfaces are rare. We performed photoemission and X-ray absorption experiments on the CoPc/MnO/Ag(100) system at different thicknesses of both oxide and organic films. The results are discussed in terms of local charge transfer processes across the interface.
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