Optically Transparent FTO-Free Cathode for Dye-Sensitized Solar Cells
2014
Kavan, Ladislav | Liska, Paul | Zakeeruddin, Shaik M. | Grätzel, Michael
The woven fabric containing electrochemically platinized tungsten wire is an affordable flexible cathode for liquid-junction dye-sensitized solar cells with the I₃–/I– redox mediator and electrolyte solution consisting of ionic liquids and propionitrile. The fabric-based electrode outperforms the thermally platinized FTO in serial ohmic resistance and charge-transfer resistance for triiodide reduction, and it offers comparable or better optical transparency in the visible and particularly in the near-IR spectral region. The electrode exhibits good stability during electrochemical loading and storage at open circuit. The dye-sensitized solar cells with a C101-sensitized titania photoanode and either Pt–W/PEN or Pt–FTO cathodes show a comparable performance.
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