Dresden 2003 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 34: Transporteigenschaften

HL 34.5: Vortrag

Mittwoch, 26. März 2003, 17:45–18:00, POT/81

Morphological and electrical characterization of dye sensitized ZnO as an electrode for photoelectrochemical cells — •Jens Reemts¹, Achim Kittel¹, Jürgen Parisi¹, Esther Ebel², Dieter Wöhrle², Derck Schlettwein³, and Tsukasa Yoshida⁴ — ¹Energy and Semiconductor Research, Department of Physics, University of Oldenburg — ²Institute of Organic and Macromolecular Chemistry, Department of Chemistry, University of Bremen — ³Physical Chemistry, Department of Chemistry, University of Oldenburg — ⁴ERES-Division, Department of Chemistry, Faculty of Engineering, Gifu University, Japan

A solar cell of the Graetzel type is usually fabricated with dye sensitized TiO₂ as one electrode. We investigate ZnO/dye electrodes where the dye is already added during the electrodeposition process of the ZnO. Due to its high surface area and a strong attachment of non-aggregated sensitizer dyes ZnO is, aside from TiO₂, a promising semiconducting material for solar energy conversion. We analyzed the influence of the dye and the dye concentration on the surface morphology of the ZnO film by means of AFM, SEM and STM. The electrical properties of the different films were characterized by means of IV-measurements and tunneling spectroscopy.