Enhanced Visible Photoluminescence and Optical Properties of Rod-like Copper Oxide Nanoparticles

Yihunie, Moges Tsega

doi:10.22068/ijmse.3976

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‎ 10.22068/ijmse.3976

Enhanced Visible Photoluminescence and Optical Properties of Rod-like Copper Oxide Nanoparticles

Moges Tsega Yihunie

Abstract: (345 Views)

Copper oxide (CuO) nanoparticles (NPs) were synthesized by the sol-gel method, followed by calcination at 600 ^oC for 2 h. The XRD pattern indicated that the synthesized CuO NPs had a monoclinic structure, with an average crystallite size of 53 nm. The FT-IR spectra showed that surfactant molecules were adsorbed on the surface of the CuO nanoparticles, along with the presence of Cu-O bonding. The TEM analysis revealed rod-like CuO NPs with diameters of about 50 nm and lengths ranging from 150 to 200 nm. The XPS analysis confirmed that copper and oxygen were synthesized as the main components with Cu²⁺ and O^2-oxidation states. The optical band gap of CuO was calculated to be 3.5 eV. The maximum PL emission was recorded at 430 nm for the 365 nm excitation wavelength, and the change in PL intensity and peak shift was calculated as a function of excitation wavelength. The Mie analysis results also showed that when crystallite sizes increased, so did the maximum values of extinction efficiency, scattering efficiency, asymmetry, and scattering matrix. The findings of this study imply that CuO NPs could be a viable choice for a variety of luminous device applications.