OICC Press Journal of Theoretical and Applied Physics 2251-7235 18 5 2024 10 30 Impact of aluminum incorporation on thin-structured iron oxide nanoparticles: A comprehensive study 1 13 10.57647/j.jtap.2024.1805.67 EN Dawood Salman Abd Al-Kader Ministry of Education, Directorate in Anbar, Anbar, Iraq https://orcid.org/0009-0008-7776-8313 Harakat Mohsin Roomy Ministry of Education, Baghdad, Iraq https://orcid.org/0000-0002-7919-4463 Journal Article 2024 10 30 Our research attempts to investigate how doping affects the characteristics of thin iron oxide(Fe2O3) layers doped with various concentrations of aluminum (Al). The structure, morphology,and optical characteristics of the films were examined and evaluated in function to the Al dopinglevel; “1%, 3%, 5%, and 7%, respectively”. As indicated by several characterizations, Fe2O3formation was confirmed as rhombohedral crystal system by X-ray diffraction, showing strongpreferential orientation in one plane (104). Every peak observed in the un doped samples shows acontinuous, slight shift towards lower values of < 2θ > with increasing aluminum “Al” dopinglevels. According to “AFM” data, as the doping ratio increases, the “grain size”, “roughnessrate”, and “root mean square” all increase. The UV spectrum was analyzed to detect the opticalproperties. Al-doped Fe2O3 thin films exhibited lower optical absorption than pure film. On theother hand, the bandgap decreased in the range of (2.31−2.2) eV with increasing Al content. Aswell as an increase in aluminum concentration is accompanied by increases in the “coefficient ofabsorption and extinction, refraction index”.