Optical properties of BiCr1-xCoxO3 double perovskite structure

In this research Double perovskite BiCr1-xCoxO3 (BCCO) with x=0, 0.15, 0.3, 0.5 (BCCO, BCO-15CO, BCO-30CO, BCCO) Thin films were prepared by Sol-Gel and spin coating method. The formation of crystal phase was investigated using X-ray diffraction. Ultraviolet-visible spectroscopy was used to determine the band gap of these materials. The results show that by increasing the percentage of cobalt in the samples, an indirect band gap is formed in them, which is much smaller than the direct gap and increases the adsorption. The experimental results obtained are consistent with theoretical research on the optical properties of this material.