Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 44: Poster IV: Thin film photovoltaics; Organic electronics and photovoltaics (jointly with CPP, HL, O); Organic thin films; Trends in atomic layer deposition (Focused session)

DS 44.41: Poster

Freitag, 30. März 2012, 09:30–12:00, Poster E

Impact of the 3d-electronic states of nickel and manganese phthalocyanines on electronic interface properties to metal substrates — •Johannes Uihlein¹, Umut Aygül¹, Fotini Petraki¹, Florian Latteyer¹, Patrick Hoffmann², Antje Vollmer², Heiko Peisert¹, and Thomas Chassé¹ — ¹Universität Tübingen, IPTC, Auf der Morgenstelle 18, 72076 Tübingen, Germany — ²Helmholtz Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Str. 15, 12489 Berlin, Germany

In recent years there has been growing interest in the field of thin organic semiconducting films due to their successful application in optical and electronic devices. Transition-metal phthalocyanines (TMPc) are a promising class of organic semiconductors with remarkable electronic and magnetic properties and they are capable candidates for future applications. The electronic configuration of the central metal atom strongly affects the electronic properties of such molecules in thin films and of corresponding interfaces [1]. Interactions at the interface between transition-metal phthalocyanines (MnPc, NiPc) and single-crystalline metal substrates (Au(100), Ag(111)) are studied using X-ray absorption (XAS) and photoemission spectroscopy. In all cases, charge transfer processes from metallic substrates to the metal 3d levels of the phthalocyanine are found. However, the detailed electronic situation depends clearly on the system under consideration.

[1] F. Petraki et. al., J. Phys. Chem. C 115 (2011), 21334-21340.