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SYOH: Organic and Hybrid Systems for Future Electronics
SYOH 5: Poster
SYOH 5.16: Poster
Donnerstag, 11. März 2004, 18:00–21:00, B
Morphology of Pentacene and Tetraazapentacene grown on SiO2 and vacuum deposited Polytetrafluoroethylene substrates. — •Paul Quinn1, S Schrader1, L Brehmer1, G Jarosz1, V Failla1, and K Gritsenko2 — 1Condensed Matter Physics, Institute of Physics, University of Potsdam, Germany — 2Institute of Semiconductor Physics NASU, Kiev, Ukraine
The growth and morphology of the pentacene based thin films, grown under ultra high vacuum, on SiO2 and vacuum deposited polytetrafluoroethylene was studied using AFM/STM, ellipsometry and polarisation dependent second harmonic generation. The films were grown under a wide range of experimental conditions with variations in the depositions rates, substrate temperatures, and geometries employed to optimise the structural ordering. Polytetrafluoroethylene, of particular interest due to the demand for low-k dielectric materials in semiconductor devices, is shown to form highly ordered films. It was found that the ordering of the pentacene and tetraazapentacene is greatly increased on the polytetrafluoroethylene surface. The ordering of the polytetrafluoroethylene and the ability of this film to promote ordering of the pentacene films is discussed. Acknowledgement: The work was supported by Marie-Curie Host Fellowships: Project MODERN No.HPMD-CT-2001-00083 and by the RTN EUROFET HPRN-CT-2002-00327