Dresden 2009 – wissenschaftliches Programm

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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.7: Poster

Donnerstag, 26. März 2009, 16:30–19:00, P1A

Preparation and Characterisation of Mixed Films of a Subphthalocyanine and a Perfluorinated Phthalocyanine — •Dominik Klaus, Christopher Keil, Robin Knecht, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik, Heinrich-Buff-Ring 16, 35392, Gießen, Germany. E-mail: schlettwein@uni-giessen.de; Fax: +49 641 9933409; Tel: +49 641 9933400

Mixed films consisting of two different organic semiconductors were studied that were prepared by physical vapour deposition on electrode structures on glass. A planar perfluorinated phthalocyanine (F₁₆PcCu) absorbing in the red was used as an electron acceptor and a cone-shaped subphthalocyanine (SubPcBCl) absorbing in the green as electron donor. Electrical conduction measurements revealed the development of the conductivity in different phases of the experiment. Further, the change of the photocurrent in dependence on different wavelengths of illumination was measured. The observed photocurrents showed light-induced charge transfer and even the direction of the photocurrent changed in different parts of the solar spectrum. A photovoltaic effect even across the electrode gap was indicated and the applicability of such films in organic bulk heterojunction solar cells is discussed.