Efficiency Enhancement of DSSC with ZnO/rGO nanocomposite

In the present work ZnO nanowires where synthesized using sol gel method the absorbance of 339 nm and bandgap of 3.38 eV were observed. The rGO was synthesized by using modified Hummers method and its absorbance and bandgap were calculated as 230 nm and 2.0 eV. The DSSCs were fabricated with ZnO using natural black mulberry dye and N719 dye, the efficiency of 3.0 % and 4.1% was observed. With the addition of reduced graphene oxide, the nanocomposite ZnO/rGO was used as photoanode for DSSCs. An enhancement in efficiency was obtained with addition of rGO. The efficiency of 5.94 % was observed with ZnO/rGO using natural black mulberry dye and efficiency of 7.3% was observed with ZnO/rGO and N719 dye. For all observations potassium iodide was used as electrolyte.