Abstract
The Ca₃Zr₂S₇ films were deposited by electrodeposition by means of linear voltammetry with a potential applied in the range of -0.1 to -3.0 V vs. SCE. The precursors used for Ca, Zr and S were calcium acetate, zirconium acetate and sodium sulfite, respectively. The films were characterized optically, morphologically and structurally. The presence of Ca, Zr and S elements was verified by energy dispersion spectroscopy analysis. The results of the X-ray diffraction showed the presence of peaks related to a structure belonging to the perovskite family, and the chemical bonds were confirmed by photoelectron spectroscopy emitted by X-rays. The electrical resistivity in the dark and light was also measured. The surface roughness of the Ca₃Zr₂S₇ film was estimated at 3.05 nm with a thickness of 600 nm. It was found that the material absorbs in the visible region of the electromagnetic spectrum with a wavelength of less than 500 nm. The Ca₃Zr₂S₇ film also exhibits ferroelectric properties at room temperature.
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