With vitamin C as a reduction agent, direct reduction of graphene
oxide (GO) into reduced graphene (RGO) to form RGO–TiO2 nanoparticle
photoanode for dye sensitized solar cell (DSSC) takes place at room
temperatures with only stirring and centrifugation. Mixing of RGO in
the DSSC photoanode improves the energy conversion efficiency. At
0.75 wt.% RGO obtained the conversion efficiency obtained is 7.89%,
which is 30.2% increase as compared to its no RGO counterpart
(6.06%). This increase is attributed to RGO's higher conductivity for
improved photoelectron transfer and reduced charge recombination