Performance of Dye-sensitized Solar Cell Based on AZO/TiO2 Photoelectrode and RGO TiO2/Pt Counter Electrode

Performance of Dye-sensitized Solar Cell Based on AZO/TiO2 Photoelectrode and RGO TiO2/Pt Counter Electrode

This study demonstrated a simple fabrication of counter electrode for dye-sensitized solar cell (DSSC). The reduced grapheneoxide (RGO) was mixed with titanium dioxide (TiO2), which was used to improve the adhesion of RGO to platinum (Pt) counterelectrodes. In addition, the photoelectrode for DSSC was fabricated using radio frequency (R. F.) sputtering method to deposit thealuminum doped zinc oxide (AZO) film as a barrier layer on TiO2 layer. The DSSCs combined with RGO TiO2 counter electrodesand AZO/TiO2 photoelectrodes were measured under the effect of different light intensities. Moreover, we adopted theelectrochemical impedance spectroscopy (EIS) system to better measure Nyquist plots. Also, the technique of cyclic voltammetry(CV) was used to measure and verify the electrocatalytic activity of RGO TiO2 counter electrodes. The EIS and CV showed thatthe RGO TiO2 counter electrodes had high electrocatalytic activity for the reduction of I3－.