Dresden 2003 – wissenschaftliches Programm
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O: Oberflächenphysik
O 27: Organische Dünnschichten I
O 27.3: Vortrag
Donnerstag, 27. März 2003, 11:45–12:00, HSZ/02
Electrical Characteristics and Structure of Perfluorinated Phthalocyanines deposited on Isolating Polymers — •Wilfried Michaelis1, Christian Kelting1, Andreas Hirth2, Dieter Wöhrle2, and Derck Schlettwein1 — 1Physical Chemstry 1, University of Oldenburg, D-26111 Oldenburg, Germany — 2Institute of Organic and Macromolecular Chemistry, University of Bremen, D-28334 Bremen, Germany
Thin films of different polymers (polystyrene, polymethylmetacrylate, polyvinylcarbazole and polyvinylchloride) were deposited by spin-coating. Also a chemical vapour deposition of polyvinylidenfluoride following thermal pyrolysis of the polymer was used to prepare films.
On these polymers, thin films of perfluorinated phthalocyanines were prepared by physical vapour deposition (PVD). The growth of these films was monitored in-situ by conductance measurements. Details of the growth mode of the phthalocyanines on the polymer thin films could thereby be analyzed. On polyvinylchloride, e.g., the phthalocyanines showed a No-dqdelayedNo-dq combined growth, where the delay is caused by diffusion of the semiconductor molecules into the isolating polymer layer.
Also the optical absorbance was monitored in-situ during the growth of the phthalocyanine films. The chromophore coupling obtained by these measurements is discussed with respect to the intermolecular arrangement of the molecular pi- systems in the films.
The morphology of the polymer films and the deposited semiconductors were controlled by atomic force microscopy and scanning electron microscopy.