The undoped CuO and CuO:Co films are grown using spray pyrolysis technique(SPT). The deposited films undergo a clear morphological change due to an increase in Cobalt dopant from 0 to 4 %. The predominant peak was (200) plane has been confirmed by Xray diffraction. Maximum crystalline size was at the (CuO: 4% Co) film, and the strain decreases from 2.98 to 2.59. Study of the morphology specifies the presence of homogeneous grains, these grains were not homogeneous and had different sizes by adding Co atom. AFM images a reduction in roughness from (7.06 to 3.64) nm. The crystallite size was in the area of 41.35 nm to 32.46 nm as calculated by Scherrer’s formula. The average transmittance values for the films were (77, 74 and 71) % for Undoped CuO, CuO: 2% Co and CuO: 4% Co respectively. The optical energy gaps of the films were calculated. the absorption coefficient increased with an increase at 2% or 4% Cobalt dopant, the band gap of Undoped CuO sample was 2.12 eV, and then decreased slightly with Cobalt content to become 2.04 eV for CuO: 2% Co and 2.04 eV for CuO: 4% Co. also The refractive index and extinction coefficient increased via Cobalt contents.

In this paper, a thin film of (Pb2-xSbxBa2Ca2Cu3O10) was deposited on glass substrate using Pulsed Laser Deposition (PLD) method with a power of 400 watts, a frequency of 6 Hz and a rate of 200 pulses. The results showed that the X-ray measurements of the prepared films (crystals). Then, optical and compositional measurements were performed on the films to determine the transmittance and absorption spectrum as a function of the incident wavelength, the value and type of the energy gap. It was found that the energy gap decreases after annealing to become (1.9 eV). As for the structural measurements, the degree of crystallinity and the growth rate of granules and films with direct transfer were calculated. These results are close to those which are obtained previously. The thin films were thermally annealed at 400 °C for two hours. Thermal annealing greatly affects the prepared films, as the annealing improves the properties of the films.