Regensburg 2007 – scientific programme

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SYOE: Symposium Organic Thin Film Electronics: From Molecular Contacts to Devices

SYOE 8: Poster Session SYOE

SYOE 8.9: Poster

Tuesday, March 27, 2007, 18:00–20:00, Poster B

Electrical Conduction in Semiconducting Thin Films of (Partially) Fluorinated Phthalocyanines — •Harry Brinkmann¹, Christian Kelting¹, Olga Tsaryova², Dieter Wöhrle², and Derck Schlettwein¹ — ¹Institut für Angewandte Physik, Justus-Liebig-Universität Gießen, 35392 Gießen — ²Institut für Organische und Makromolekulare Chemie, Universität Bremen, 28334 Bremen

Partially fluorinated phthalocyanines with two fluorine atoms in each benzene ring of the ligand (F8Pc) or phthalocyanines with one fluorine atom in each benzene ring (F4Pc) represent molecules with interesting intermediate characteristics between the p-type unsubstituted phthalocyanines F0Pc and the n-type perfluorinated F16Pc as seen in, e.g. semiempirical quantum chemical calculations and also in photoelectron spectroscopy experiments. We report here about the growth of zinc and copper complexes of F16Pc, F8Pc, F4Pc and F0Pc on organic and inorganic insulating substrates suitable for OFET applications. The development of the electrical conduction was studied in-situ during film growth and the results are discussed with respect to the growth mode of films. In a number of cases the formation of an ultrathin conductive layer in the monolayer range could be established, typically followed by a reorganization towards island growth (Stranski-Krastanov growth mechanism).