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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster: Interfaces and Thin Films

CPP 19.18: Poster

Dienstag, 15. März 2011, 18:00–20:00, P2

Novel structuring routine of PEDOT:PSS applied to organic photovoltaics — •Christopher Birkenstock, Robert Meier, and Peter Müller-Buschbaum — TU München, Physik Department, LS Funkt. Mat., James-Franck-Str. 1, 85748 Garching, Germany

In order to improve device characteristics in organic photovoltaic, nano- and micro-structured substrates and polymer layers show a promising way to increase efficiency by optimization of light harvesting and charge carrier separation in solar cells. In this work we present a novel micro-structuring method based on wet-imprinting principles, which can be applied on an electron blocking PEDOT:PSS layer as they are used in electronic applications. It is based on different micro-channel polycarbonate molds and it allows a high ratio of reproducibility and an accurate control of the total film-thickness. The influence of the structuring of PEDOT:PSS on the optical absorption and the overall device efficiency for polymeric solar cells based on P3HT:F8BT blends is investigated. The inner film morphology and the surface topography of the blend films are probed. A light trapping effect is obtained, which allows thinner design conceptions and is interesting for better electrical conductivity trough the photoactive film.