Berlin 2014 – scientific programme

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MO: Fachverband Molekülphysik

MO 13: Posters 3: Cold Molecules, Helium Nano Droplets, and Experimental Techniques

MO 13.29: Poster

Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais

Development of an in-situ electrochemical flowcell for soft x-ray absorption and emission spectroscopy — •Christoph Schwanke and Kathrin Aziz-Lange — Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany

The investigation of liquid-solid interfaces with soft x-ray absorption and emission spectroscopy is interesting for dye sensitized solar cells, fuel cells, batteries, water splitting, corrosion and electrodeposition. Adding electrodes to a flowcell gives the possibility to get electronic structure information and the oxidation state of these systems in-situ, meaning while a voltage is applied. Additional to the information gained with x-ray absorption and emission spectroscopy the system can be evaluated with cyclic voltammetry in our three electrode setup. Future experiments will investigate a fully working dye sensitized solar cell based on a Zn-porphyrin dye (YD2-O-C8) and a cobalt polypyridine redox couple. The investigations will cover the interactions between the components of dye sensitized solar cells. In this poster we will present details of this experimental technique and first results of cyclic voltammetry.