Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 142, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4907899
Keywords
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Funding
- German Research Council [PE 546/5-1, CH 132/23-1]
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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 pi-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. (C) 2015 AIP Publishing LLC.
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