Dresden 2009 – scientific programme

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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.9: Poster

Thursday, March 26, 2009, 16:30–19:00, P1A

Dye-sensitized solar cells based on nanostructured zinc oxide — •Jonas Conradt¹, Jȩdrzej Szmytkowski^1,2, Florian Maier-Flaig¹, Janos Sartor¹, Johannes Fallert¹, Manuel Reinhard⁴, Alexander Colsmann⁴, Uli Lemmer^2,4, Teodor Silviu Balaban^2,3, and Heinz Kalt^1,2 — ¹Karlsruhe Institute of Technology (KIT), Universität Karlsruhe (TH), Institute of Applied Physics, Karlsruhe, Germany — ²Center for Functional Nanostructures (CFN), Karlsruhe, Germany — ³Karlsruhe Institute of Technology (KIT), Forschungszentrum Karlsruhe, Institute for Nanotechnology, Karlsruhe, Germany — ⁴Karlsruhe Institute of Technology (KIT), Universität Karlsruhe (TH), Lichttechnisches Institut, Karlsruhe, Germany

Hybrid solar cells represent a promising (cost-efficient) alternative to pure inorganic solar cells. We present dye-sensitized solar cells (DSSC) which are based on a zinc oxide (ZnO) electrode covered with a ruthenium dye. Our work focuses on the morphology of the ZnO electrode and its impact on the photovoltaic performance of the solar cell. Nanocrystalline ZnO powder layers and arrays of nanorods are incorporated into the DSSCs. The ZnO nanorods are grown by vapor transport deposition. The morphology and doping concentration of the rods can be controlled by the choice of substrate material, growth condition and catalytic metal layers. The nanorod arrays are expected to fasten the electron transport towards the anode and thereby improve the solar cell efficiency. In addition, novel self-assembling (porphyrin) dyes are tested as sensitizer within a DSSC.