Novel CuO/TiO2 Nanocomposite Films with a Graded Band Gap for Visible Light Irradiation

作者：Zhang, Xiangchao; Tang, Aidong^*

来源：Materials Express, 2012, 2(3): 238-244.

DOI：10.1146/mex.2012.1069

• Oxide Materials
• Sol-Gel Process
• Optical Properties
• Nanocomposite Films
• Gradient

CuO/TiO2 nanocomposite film with a graded band gap was designed and synthesized by varying the composition of CuO/TiO2 molar rate from the substrate to the surface along the depth direction using the sol gel method. The as-synthesized samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), ultraviolet-visible (UV-vis) and voltage current (V/l) analyses. The results demonstrated that the chemical compositions of CuO/TiO2 upgraded nanocomposite film achieved gradient composition along the thickness direction, the absorption edge for CuO/TiO2 nanocomposite film had a red shift which moved towards the visible light region, and the photoelectrochemical properties of the nanocomposite film was evidently improved comparing with that of TiO2 film. The experimental result provided an intriguing perspective on the development of the thin film solar cell.

• 出版日期2012-9
• 单位中南大学; 长沙学院