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 8.41: Poster
Dienstag, 27. März 2007, 18:00–20:00, Poster B
Investigation on thin films of new substituted quarterthiophene — •Kinga Zelenetskaya1, Evelin Jähne1, Hans-Jürgen Adler1, Christian Loppacher2, Lukas Eng2, Jörg Grenzer3, and Andrea Scholz3 — 1Professur für Makromolekulare Chemie und Textilchemie, Fachrichtung Chemie und Lebensmittelchemie, Technische Universität Dresden, Mommsenstrasse 4, D-01062 Dresden, Germany — 2Institut für Angewandte Photophysik, Fachrichtung Physik,Technische Universität Dresden, George-Bähr-Strasse 1, D-01062 Dresden, Germany — 3Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Bautzner Landstrasse 128, D-01328 Dresden, Germany
α,ω-dicyano substituted β,β*-dibutylquarterthiophene (DCNDButQT) was synthesized and fully characterized by 1H-NMR and 13C-NMR, elemental analysis, UV-visible spectroscopy, DSC, TGA and cyclic voltammetry. The band gap energy (ΔEg) calculated from cyclic voltammetry data was found to be 1.97 eV, which is in the range of semiconductor materials (ΔEg < 3.0 eV).
DCNDButQT was deposited on different substrates (Al2O3, SiO2, TiO2) by vacuum deposition and solution-cast methods. The structure of the thin films analysed by AFM and XRD showed different morphology depending on cast method. The spin-coating and drop-casting films showed amorphous structure, whereas the vacuum-deposition films exhibit a fine crystalline structure. AFM of vacuum-deposition film revealed the formation of well-ordered terrace structures, the step between adjacent terraces is about 1.5 nm.