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

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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 I) 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.

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Keywords: GEL PROCESS; GRADIENT; NANOCOMPOSITE FILMS; OPTICAL PROPERTIES; OXIDE MATERIALS; SOL&NDASH

Document Type: Research Article

Publication date: September 1, 2012

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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