The Preparation and Performance of WO3@C as a Counter Electrode Catalyst for Dye-Sensitized Solar Cell

Tungsten trioxide (WO 3 ) loaded on activated charcoal powder (ACP) was sprayed onto ITO conductive glass for using in dye-sensitized solar cells(DSSC). The results showed that the composite electrode of WO 3 @ACP had apparently catalytic activity as a counter electrode for the regeneration of the traditional iodide / triiodide (I - /I 3- ) redox pair. In the dye-sensitized solar cell, the power conversion efficiency on WO 3 @ACP was 5.04%, which was 3.15 times higher than 1.61% on the WO 3 . The followed were the electrical properties test of cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS) and Tafel polarization curve. It was further explained that the catalytic activity of WO 3 @ ACP was obviously affected by the dispersion of WO 3 particles on activated carbon powder.