Solvothermal synthesis of ternary CdSxSe1−x–graphene composites with improved photoelectric properties

CdSxSe1−x–graphene composites were prepared by a solvothermal process using cadmium acetate as Cd precursors, sulfourea as S precursors and selenium powder as Se precursors. CdSxSe1−x–graphene composites were characterized by X-ray diffraction, scanning electron microscope and ultraviolet–visible absorption spectroscopy. The photoelectric properties of CdSxSe1-x–graphene and bare CdSxSe1-x were investigated by transient photocurrent responses and three-electrode cyclic voltammetry. Compared with bare CdSxSe1−x, CdSxSe1−x–graphene composites show the improved photoelectric characteristics in the presence of graphene.