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HL: Halbleiterphysik
HL 31: Organic semiconductors
HL 31.5: Talk
Wednesday, March 29, 2006, 15:30–15:45, POT 51
Novel fullerene-derivatives for plastic solar cells — •Tobias Erb1, Uladzimir Zhokhavets1, Harald Hoppe1, Paul Denner1, Gerhard Gobsch1, Steffi Sensfuss2, Lars Blankenburg2, and Elisabeth Klemm3 — 1Institute of Physics, Ilmenau Technical University, 98693 Ilmenau, Germany — 2TITK Institut Rudolstadt, Physical Material Research and Functional Polymer Systems, 07407 Rudolstadt, Germany — 3Institut für Organische Chemie und Makromolekulare Chemie, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
We have investigated several fullerene-derivatives in pristine films or in bulk heterojunctions with polymers. Their structural properties were studied by X-ray diffraction in grazing incidence geometry. The lattice symmetry and the size of the fullerene and polymer nanodomains were determined. Furthermore, the optical properties were studied with spectral ellipsometry. The influence of various annealing steps on the film properties were investigated, too. The X-ray findings show particularly, under which conditions fullerene-derivates crystallize. Solar cells have been optimised using the results from X-ray and were characterized under AM 1.5 standard solar irradiation simulation.