1. Electronic structure at transition metal phthalocyanine-transition metal oxide interfaces: Cobalt phthalocyanine on epitaxial MnO films.
- Author
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Glaser, Mathias, Peisert, Heiko, Adler, Hilmar, Aygül, Umut, Ivanovic, Milutin, Nagel, Peter, Merz, Michael, Schuppler, Stefan, and Chassé, Thomas
- Subjects
ELECTRONIC structure ,PHTHALOCYANINES ,TRANSITION metal oxides ,COBALT ,MANGANESE oxides ,THIN films ,EPITAXY - Abstract
The electronic structure of the interface between cobalt phthalocyanine (CoPc) and epitaxially grown manganese oxide (MnO) thin films is studied by means of photoemission (PES) and X-ray absorption spectroscopy (XAS). Our results reveal a flat-lying adsorption geometry of the molecules on the oxide surface which allows a maximal interaction between the p-system and the substrate. A charge transfer from MnO, in particular, to the central metal atom of CoPc is observed by both PES and XAS. The change of the shape of N-K XAS spectra at the interface points, however, to the involvement of the Pc macrocycle in the charge transfer process. As a consequence of the charge transfer, energetic shifts of MnO related core levels were observed, which are discussed in terms of a Fermi level shift in the semiconducting MnO films due to interface charge redistribution. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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