A seminar entitled( Preparation and study of the physical properties of titanium dioxide TiO₂ and molybdenum disulfide MoS₂ and their application in solar cells) hold at the College of Science, Department of Physics.

The presenter ( Sajjad Said Dryol ) . the results of the images taken for the scanning electron microscope (SEM) were discussed. It turned out that the shape of the TiO₂ compound is in the form of homogeneous quadrangular nanorods The upper faces of these bars are square in shape. As for the SEM images of the MoS₂ compound, it turns out that the nanoparticles are formed in the form of nanosheets in two dimensions. The results of X-ray diffraction (XRD) for the two compounds were also discussed. The results of the study showed that all the diffraction peaks of TiO₂ belong to the rutile phase, while the diffraction peaks of MoS₂ belong to the hexagonal phase . The results of the optical measurements showed that the TiO₂ compound absorbs in the ultraviolet region and the energy gap is about 2.99 eV, while the absorption spectrum of the MoS₂ compound is in the visible region and the energy gap is 1.7 eV .