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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 41: Nanoparticles and Composite Materials II
CPP 41.4: Vortrag
Donnerstag, 25. März 2010, 14:45–15:00, H48
Controlled embedding of semiconducting nanoparticles in a conducting polymer template — •Matthias A. Ruderer1, Stefan M. Prams1, Weinan Wang1, Qi Zhong1, Robert Meier1, Stephan V. Roth2, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department LS E13, James-Franck-Str. 1, 85747 Garching (Germany) — 2HASYLAB at DESY, Notkestr. 85, 22603 Hamburg (Germany)
Photovoltaic based on organic compounds such as conjugated polymers attracted increasing interest during the last two decades. Beside of all organic systems, the combination of an inorganic and an organic component, so called hybrid composites, have shown promising properties. In a typical hybrid system an inorganic porous template is filled with an organic photoactive material. Our approach is based on the selective embedding of nanoparticles in a diblock copolymer matrix. [1] We use a rod-coil like copolymer, with a photoactive conjugated and a styrene block, as a template for embedding titania nanoparticles which are directed into the coil like part. The structural length is defined by the copolymer and is in the range of the exciton diffusion length which is crucial in organic systems. The evolving structures are investigated with imaging methods like SEM and grazing incidence small angle X-ray scattering (GISAXS). The influence on the optical and electrical properties are investigated with UV/Vis and conductivity measurements and compared with the structural results. [1] M.M.Abul Kashem, J.Perlich, L.Schulz, S.V.Roth, P.Müller-Buschbaum; Macromolecules 41, 2186-2194 (2008)