Effect of Irradiation on the Electronic Transitions of CuO Thin Films Prepared by SPD Technique
Year: 2026
Type: article
Abstract: Investigates this study the effect of gamma irradiation (E= 662 KeV from a Cs137 source) on the optical properties specifically the absorption coefficient and band gap of Copper Oxide (CuO) thin films prepared by spray pyrolysis deposition (SPD) technique on glass substrates at (400°C) with a thickness of (300nm). Irradiation durations of (18 and 24) days were applied. XRD analysis the dominant diffraction peaks correspond to characteristic Copper Oxide (CuO) reflections, indicating preferential growth orientation consistent with monoclinic Copper Oxide (CuO), confirms that the CuO films are polycrystalline and crystallize in the monoclinic C2/c phase.The films exhibit both direct and indirect allowed electronic transitions. The direct optical band gap ranges from (2.4–2.7) electron Volt, while the indirect band gap ranges from (1.8–2.1) electron Volt for non-irradiated and irradiated samples.Gamma irradiation results in a measurable decrease in the absorption coefficient and an apparent increase in both direct and indirect optical band gaps, indicating irradiation-induced modification of electronic states
DOI: 10.30526/39.3.4429
Institution: Middle Technical University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7203569441