Investigation of Structural, Optical, and Electronic Properties of Doubly Doped NiO (Co, Fe) using X-ray Absorption Spectroscopy, UV-Visible Spectroscopy, Raman Spectroscopy, and Photoluminescence

This study explores the structural, optical, and electronic properties of doubly doped nickel oxide (NiO) incorporating cobalt and iron (Co, Fe) through various characterization techniques, including X-ray diffraction (XRD), X-ray absorption near-edge spectroscopy (XANES), UV-visible spectroscopy, Raman spectroscopy, and photoluminescence (PL). The research compares two sample types, DR (doped with Co and Fe via dry method) and SR (doped with Co and Fe via a solution route), to assess the influence of doping on the material's properties. Our findings suggest that while both doping methods result in similar lattice constants and optical characteristics, the solution-doped samples exhibit enhanced photoluminescence emission intensities and greater stability under environmental conditions. These insights provide valuable information for potential applications in optoelectronic devices and energy storage systems.