Abstract
CeO 2-TiO 2/SiO 2 double-layered films were coated on glass substrates using sol-gel method. The films, formed using spin-coating process, had two optical properties at the same time, anti-reflection in visible region and ultraviolet rays (UV) shielding. The films could be used as museum windows, commercial high-resolution displays and so on. These films were composed of CeO 2 and TiO 2 with molar ratio of 50 to 50 in the first layer and silica matrix in the 2nd layer. Furthermore, the 2nd layer was composed of porous silica films, which showed a lower refractive index, reducing the reflectance significantly in visible wavelength region. The reflectance of the films in visible region between 400 × 700 nm was lower than 2%, and almost 100% UV was shielded. The surface roughness of the films was observed through an atomic force microscope, a depth composition profile of the double layered film was measured with an X-ray photoelectron spectrometer (XPS).
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