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Optimization of the Performance of Dye‐Sensitized Solar Cells Based on Pt‐Like TiC Counter Electrodes


Titanium carbide (TiC) has been used as a counter electrode (CE) catalyst in place of Pt for triiodide reduction in dye‐sensitized solar cells (DSCs). Its catalytic activity can be comparable to that of Pt. The effect of the thickness of the TiC layer on the performance of the DSCs was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and Tafel polarization measurements. We found that as the film thickness increased, the fill factor and short‐circuit current density increased, which led to improved power‐conversion efficiency. When the TiC film was thicker than 20 μm, however, no significant continuous improvement in the catalytic activity was observed. A high power‐conversion efficiency of 6.46 % was obtained for the DSC by using a TiC CE at the optimized film thickness, a value similar to that obtained with a Pt CE.

A versatile material, TiC, has been introduced into a DSC system as a CE catalyst, catalyzing the regeneration of the I3/I redox couple in the electrolyte. The effect of the loading of TiC on FTO glass on the performance of the DSC was investigated systematically. Under optimized conditions, a high‐power conversion efficiency was obtained.

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Authors:   Yudi Wang, Mingxing Wu, Xiao Lin, Anders Hagfeldt, Tingli Ma
Journal:   European Journal of Inorganic Chemistry
Year:   2012
Pages:   n/a
DOI:   10.1002/ejic.201200329
Publication date:   22-Jun-2012
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