Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 56: Metal substrates: Adsorption of organic / bio molecules III
O 56.1: Talk
Wednesday, March 28, 2012, 16:45–17:00, A 053
Ruthenium dyes on Au(111) and Ag(111) investigated by scanning tunneling microscopy — •Nadine Hauptmann1, Christian Hamann1, Felix Köhler2, Rainer Herges2, Hao Tang3, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 2Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 3CEMES/CNRS, 31055 Toulouse Cedex, France
Ruthenium dyes are promising candidates for sensitizers in dye-sensitized solar cells. We used electrospray ionization to deposit the dyes on Ag(111) and Au(111) surfaces in ultra high vacuum. The structure of the adsorbed molecules was analyzed with low-temperature scanning tunneling microscopy. In addition, scanning tunneling spectroscopy was used to investigate the electronic properties of the ruthenium dyes revealing sharp features in the differential conductance in addition to the HOMO-LUMO gap. Financial support by the Deutsche Forschungsgemeinschaft via the SFB 677 is acknowledged.