Preparation of well-proportioned SnS hollow microsphere on graphene and the application in dye-sensitized solar cells

The well-proportioned SnS hollow microsphere has been prepared on reduced graphene oxide (RGO) to form SnS@RGO composite, which are applied to the counter electrode (CE) in dye-sensitized solar cells (DSSCs), and the power conversion efficiency (PCE) of 8.21% is obtained, which is higher than 7.75% in the case of Pt, indicating a faster reaction rate of charge transfer and excellent catalysis of iodide ion for SnS@RGO. It show that SnS@RGO is a promising composite material in the field of CE.