Regensburg 2010 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 48: [O] Organic Electronics and Photovoltaics III (Joint Session DS/CPP/HL/O)
DS 48.4: Vortrag
Freitag, 26. März 2010, 12:00–12:15, H40
Vanadyle and perfluoro vanadyle phthalocyanine on gold: unseen metastable modification and interfacial reaction — •Indro Biswas, Heiko Peisert, and Thomas Chassé — Institut f. Physikalische u. Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen
Vanadyle phthalocyanine (PcVO) and perfluorinated-vanadyle phthalocyanine (F16PcVO) are of the same inside-out-umbrella structure as the extensively investigated titanyle phthalocyanine. Just in the recent years, interest on these molecules has grown again. They exhibit some very surprising properties. Thin films of PcVO and F16PcVO on polycrystalline gold have been examined using photoemission, X-ray absorption, optical spectroscopy, and Kelvin probe measurements. In addition to surprisingly good self-ordering abilities of both materials, an interface reaction including the fluorine substituents in F16PcVO has been observed, and the application of the minimal invasive Kelvin probe method allowed the investigation of the undisturbed metastable Phase I of PcVO with a different interface formation, which will be transformed by conventional spectroscopic methods.
1 C. H. Griffiths, M. S. Walker, P. Goldstein, Polymorphism in Vanadyle Phthalocyanine, Mol. Cryst. Liq. Cryst. 33 (1976) 149.