Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 24: Poster: Organic Semiconductors
CPP 24.32: Poster
Mittwoch, 28. März 2012, 11:00–13:00, Poster A
Optical characterisation of highly ordered donor-acceptor films as fabricated by means of the Langmuir Blodgett technique — •Felix Herrmann1, Sviatoslav Shokhovets1, Harald Hoppe1, Uwe Ritter1, Rainer Beckert3, Karl-Heinz Feller2, Gerhard Gobsch1, Erich Runge1, and Martin Presselt1 — 1TU Ilmenau, Ilmenau, Germany — 2University of Applied Sciences Jena, Jena, Germany — 3Friedrich Schiller Universität, Jena, Germany
In organic solar cells the interface between electron donor and acceptor molecules is of crucial importance for charge separation, but is rather inhomogeneous and difficult to characterize in bulk-heterojunction organic solar cells. Therefore, we applied the Langmuir-Blodgett technique to tune the molecular ordering at the heterointerface of donor-acceptor bilayers up to more or less crystalline phases. The applied substances need to possess an amphiphilic structure to realize high surface pressures. As donor we used [6,6]-phenylC61-butyric acid and as donor a highly photostable thiazole derivative. The optical properties of these devices are characterizes by means of photothermal deflection and photoluminescence spectroscopy.