Synthesis of hemin functionalized graphene and its application as a counter electrode in dye-sensitized solar cells

► Hemin functionalized reduced graphene oxide (hemin-RGO) materials were synthesized by microwave irradiation. ► Hemin-RGO exhibits a homogeneous dispersion in water, dimethylformamide, and acetone. ► Hemin-RGO was used as a counter electrode in dye-sensitized solar cells and exhibited preferable electrocatalytic activity.