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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.48: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Fabrication and investigation of plasmonic nano gratings for photovoltaic devices — •Felicitas Walter, Dominik A. Gollmer, Christopher Lorch, Jiri Novak, Frank Schreiber, Dieter P. Kern, and Monika Fleischer — Institute for Applied Physics, Eberhard Karls University, 72076 Tübingen, Germany

The emerging field of plasmonics has brought about methods for guiding and localizing light at the nanoscale. Now the attention of researchers in this field has turned towards applications, where design approaches based on plasmonics can be used e.g. to improve absorption in photovoltaic devices. In this context we combine organic photovoltaics with plasmonic gold structures. It is our goal to increase the efficiency of such devices by the optical near field enhancement and scattering at the structured interfaces. Plasmonic gold structures are fabricated using the serial procedure of electron beam lithography, with which we have great flexibility regarding size and shape. First line gratings were fabricated, where we varied the periodicity and the line width. In addition, dot gratings with varying radii and periodicity were produced. For testing these gratings can be covered with organic layers relevant for photovoltaics. The optical properties of the structures are studied without and with such layers. Here we will present scanning electron micrographs of the gold structures and optical transmission spectra of these structures without and with added organic thin films.