Regensburg 2007 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 6: Organic Photovoltaics (SYOE 2)
DS 6.4: Vortrag
Montag, 26. März 2007, 16:45–17:00, H32
Spin-Coated Hybrid Layers of Crystalline Silicon Nanoparticles and Semiconducting Polymers: Optical, Structural and Electronic Properties — •Roland Dietmüller1, Robert Lechner1, André R. Stegner1, Rui N. Pereira1, Martin S. Brandt1, Heiko Thiem2, Martin Trocha2, Hartmut Wiggers3, and Martin Stutzmann1 — 1Walter Schottky Institut, Technische Universität München, Am Coulombwall 3, 85748 Garching, Germany — 2Degussa AG, Paul-Baumann-Str.1, 45764 Marl, Germany — 3Universität Duisburg-Essen, Institute of Combustion and Gas Dynamics, Lotharstr. 1, 47048 Duisburg, Germany
Organic semiconductors have received a lot of attention for novel, low cost electronic applications (e.g. printable electronics). Silicon, in form of nanoparticles, could be incorporated in such organic devices to tailor their physical properties. For example, hybrid organic-inorganic solar cells could benefit from the solution processing of polymer semiconductors and from the high electron mobility of the non-toxic silicon.
We have investigated the optical properties, in particular absorption spectra, of spin-coated layers of crystalline silicon nanoparticles, semiconducting π-conjugated polymers like poly(3-hexylthiophene-2,5-diyl) (P3HT), [6,6]-phenyl C-61-butyric acid methyl ester (PCBM) or poly[(9,9-dioctylfluorene-2,7-diyl)-co-bithiophene] (F8T2) and mixed layers of polymers and silicon nanoparticles. To further characterize the spin-coated layers, atomic force and optical microscopy has been employed. Also, the electrical properties of sandwich-like structures of polymers and crystalline silicon nanoparticles are discussed.