Regensburg 2004 – wissenschaftliches Programm
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SYOH: Organic and Hybrid Systems for Future Electronics
SYOH 5: Poster
SYOH 5.47: Poster
Donnerstag, 11. März 2004, 18:00–21:00, B
Organic Photovoltaic Elements - Influence of 100 nm scale electrode spacing on morphology and efficiency for PF/PANI conjugated block copolymer — •Jörg Seekamp1, R. Güntner2, V.G. Solovyev1, A.P. Kam1, A. Goldschmidt1, T. Farrell2, U. Scherf2, and C.M. Sotomayor Torres1 — 1Institute of Materials Science and Department of Electrical and Information Engineering, University of Wuppertal, Gauß Straße 20, 42097 Wuppertal, Germany — 2Fachbereich Chemie, Makromolekulare Chemie, University of Wuppertal, Gauß Straße 20, 42097 Wuppertal, Germany
The transport properties of organic semiconductors in solar cells are the object of intense research. The efficiency of these devices crucially depends on the charge separation and effective transport to metal electrodes. This work combines closely spaced electrodes and the intrinsically nanostructured morphology of a block copolymer to improve the efficiency. The idea is to direct the intrinsic nanostructuring along the electrodes sorting the acceptor and donor block to the respective electrode. The experimental results discussed in terms of spectrally resolved external quantum efficiency with respect to electrode spacings between 100 nm and 10 um were obtained from interdigitated electrodes patterned by electron beam lithography and nanoimprint lithography. They were covered with the conjugated block copolymer polyfluorene/polyaniline (PF/PANI) as a model system for photovoltaic applications. This work is supported by the Volkswagen Stiftung (I/77 721).