Abstract

Abstract CCTO thin films were deposited on Pt(1 1 1)/Ti/SiO 2 /Si substrates using a chemical (polymeric precursor) and pressure method. Pressure effects on CCTO thin films were evaluated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and optical properties which revealed that a pressure film (PF) is denser and more homogeneous than a chemical film (CF). Pressure also causes a decrease in the band gap and an increase in the photoluminescence (PL) emission of CCTO films which suggests that the pressure facilitates the displacement of Ti in the titanate clusters and the charge transference from TiO 6 to [TiO 5 V 0 z ], [TiO 5 V 0 z ] to [CaO 11 V 0 z ] and [TiO 5 V 0 z ] to [ CuO 4 ] x .

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