In this paper, we reported the preparation of a thin film of Cu2O of a thickness of about 200 nm on a glass substrate using rapid thermal annealing by Nd-YAG pulse laser. The x-ray diffraction (XRD) results showed that the prepared Cu2O thin film is polycrystalline and the crystal structure is cubic with the planes of (111) and (200) are dominated. In addition, the optical measurements showed that the spectral permeability of the prepared thin film is high (73 % - 90 %) in visible and infrared (IR) regions and also the thin film has a high absorbance as a function of the incident wavelength in the ultraviolet (UV) region. The energy gap of the Cu2O thin film, on the other hand was also measured and it was found that it is 2 eV with allowable direct transition. It was also found that the rapid thermal annealing technique resulted in an increase in the particle size of the Cu2O and a decrease in the value of the energy gap of the latter, while annealing at 300 oC resulted in entirely Cu2O to CuO transformation and eventually an enhancement in the properties of the prepared thin film.

Ultraviolet (UV), Ultra-high Vacuum (UHV), Pulsed Laser Evaporation (PLD), Infrared (IR).