Carbon nanotubes hybrid carbon counter electrode for high efficiency dye-sensitized solar cells

We report a carbon nanotubes modified graphite/carbon black as a low-cost platinum-free counter electrode (CE) for dye-sensitized solar cell (DSSC). The DSSC based on this CE(25 wt% CNT content)achieves a high power conversion efficiency of 6.94%, which is comparable to Pt of 7.06%.