Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 44: Postersession II
DS 44.38: Poster
Donnerstag, 23. März 2017, 17:00–19:00, P1C
Interactions at the interface of Cobalt phthalocyanine and graphene covered metal surfaces: Influence of fluorination of CoPc — •David Balle, Malgorzata Polek, Reimer Karstens, Peter Grüninger, Hilmar Adler, Thomas Chassé, and Heiko Peisert — Institute of Physical and Theoretical Chemistry, Auf der Morgenstelle 18, 72076 Tuebingen, University of Tuebingen, Germany
The unique electronic, optical and magnetic properties of transition metal phthalocyanines (TMPc) have recently led to increasing research efforts and make them suitable candidates for possible organo-electronic devices. Interactions at interfaces, like charge transfers, can drastically change said properties, though, and need to be carefully investigated.
Graphene buffer layers present an effective way to manipulate or prevent such transfer processes. To function as such a buffer layer, interaction between the graphene layer and the substrate must be controlled, though. Properties of strongly bound and coupled graphene on Ni(111) are severly affected, while an intercalated, uncoupled graphene layer can influence interactions between the substrate and the organic layer. Variations of other electronic interface parameters, such as fluorination of the phthalocyanines, also have an impact, leading to a persisting interaction at the interface for CoPcF16 while the corresponding interaction is blocked for CoPc on intercalated graphene on Nickel.
Investigations were carried out using mainly X-ray absorption and photoemission spectroscopies (XAS, PES).