Dresden 2011 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films
DS 42.22: Poster
Mittwoch, 16. März 2011, 15:00–17:30, P1
Donor-block-acceptor systems for photovoltaic applications — •Sven Hüttner1, Michael Sommer2, Kerr Johnson1, Carol Huang1, and Richard H. Friend1 — 1Cavendish Laboratory, University of Cambridge, UK — 2Melville Laboratory, University of Cambridge, UK
Polymer solar cells rely on a donor and an acceptor material that form an interpenetrating morphology. This ensures charge separation at the interface, but also a proper charge percolation to the electrodes at the same time. Furthermore, the right position of HOMO and LUMO levels of the respective materials are important for an efficient charge separation. We present novel donor-block-acceptor polymers that can be applied in light harvesting devices. We want to control the heterojunction interface by these donor-block-acceptor molecules. These act as a phase compatibilizer to modify the polymer blend phase separation, but also affect the energetic environment of the heterojunction. Besides their structural characterisation, we investigated these materials by time-resolved spectroscopy. The donor-block-acceptor macromolecules contain P3HT as a donor block, and the acceptor block consists of perylene bisimide derivatives or F8TBT.