Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: Organic Semiconductors
CPP 8.34: Poster
Montag, 14. März 2011, 17:30–19:30, P2
Alternative Electrode Concepts and Materials for Organic Solar Cells — •Lars Müller-Meskamp1, Christoph Sachse1, Yong Hyun Kim1, Michael Machala1, Olaf Hild2, Christian May2, and Karl Leo1,2 — 1Institut für Angewandte Photophysik, Dresdner Innovationszentrum Energieeffizienz, Technische Universität Dresden, George Bähr Straße 1, 01069 Dresden, Germany — 2Fraunhofer Institut für Photonische Mikrosysteme, Maria-Reiche Strasse 2 01109 Dresden, Germany
Organic photovoltaics, reaching efficiencies around 8% (Heliatek, Solarmer), have become a promising technology for future energy supply. It has the potential to be cost-effective, to use little material and to utilize advanced thin film production methods like roll to roll manufacturing. Requirements for producing such a low-cost and flexible product include a highly transparent, flexible electrode. Looking for alternatives to the dominant oxide electrodes, transparent, conductive electrodes were prepared by PEDOT:PSS deposited from solution, by deposition of metal nanowires, and by a combination thereof. As recently demonstrated by us, solvent treated PEDOT electrodes can be successfully integrated into OPV cells, showing similar performance than ITO. The application of conductive metal nanoparticles, e.g. silver nanowires as random mesh electrode is showing even better performance. Low sheet resistances and good transmission can be achieved in a percolation network of high aspect ratio nanowires with low space-fill ratios.