Regensburg 2002 – wissenschaftliches Programm

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SYOH: Organische Halbleiter

SYOH 7: Poster

SYOH 7.33: Poster

Montag, 11. März 2002, 18:00–21:00, C

Growth of Organic n-Conductors on Thin Polymer Films for Use in Organic Field Effect Transistors — •Wilfried Michaelis¹, Andreas Hirth², Dieter Woehrle², and Derck Schlettwein¹ — ¹Physical Chemistry 1, Univ. Oldenburg, Germany — ²Dept. of Chemistry, Univ. Bremen, Germany

Thin films of different polymers (polystyrene, polymethylmetacrylate, polyvinylcarbazol and polyvinylidenfuoride) were deposited by spin-coating on ITO-electrodes. On these polymers thin films of perfluorinated phthalocyanines were prepared by physical vapour deposition. The growth of these films was monitored in-situ by optical absorbance and conductance measurements. The optical absorbance spectra are discussed using the point-dipole approximation to obtain information of the intermolecular arrangement of chromophores in the films. The measurements of conductance give insights into the growth mode of the substituted phthalocyanine films. In a further step the polymer layers were used as gate insulator in an organic field effect transistor. The morphology of the polymer film and the deposited semiconductors were controlled by atomic force microscopy and the influence on the optical and electric properties of the films is discussed.