Regensburg 2007 – wissenschaftliches Programm
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SYOE: Symposium Organic Thin Film Electronics: From Molecular Contacts to Devices
SYOE 8: Poster Session SYOE
SYOE 8.9: Poster
Dienstag, 27. März 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).