Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: Colloidal and Nanoparticles
CPP 13.6: Vortrag
Dienstag, 26. Februar 2008, 16:15–16:30, C 264
TiO2 nanoparticles by PEOMA-PDMS-PEOMA block copolymer — •Mine Memesa1, Jan Perlich2, Sebastian Lenz1, Sebastian Nett1, Sebastian Emmerling1, Peter Müller-Buschbaum2, and Jochen S. Gutmann3 — 1Max-Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany — 2TU München, Physik-Dept. LS E13 James-Franck-Str. 1, 85747 Garching, Germany — 3Institute of Physical Chemistry, University Mainz, D-55099, Mainz, Germany
The effect of titanium oxide (TiO2) nanoparticles on the efficiencies of conjugated polymer photovoltaics has been widely studied. Preparation of TiO2 nanoparticles by using an amphiphilic block copolymer as a templating agent via a sol-gel process resulted in different morphologies. In this study, TiO2 nanoparticles are prepared by a poly(dimethylsiloxane) (PDMS) containing block copolymer, poly(ethyleneoxide)methacrylate(PEOMA)-block-PDMS-block-PEOMA via sol-gel chemistry. By varying the components of the sol gel, the morphology of the particles formed is investigated by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Grazing Incidence Small Angle X-ray Scattering (GISAXS). The ability of PDMS to turn into silicon-oxi carbide (Si-O-C) after being heated to elevated temperatures is believed to act as an alternative to the conventional blocking layer between conducting transparent electrode (FTO) and the photoactive layer in hybrid organic solar cells. The results of the ongoing study on the morphology of the particles and resultant physical properties will be presented.