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<p>In this study, the co-precipitation approach has been effectively used to synthesize pure NiO, Fe-doped NiO, and Co-doped NiO nanoparticles with 2% of dopant. The crystal structure and morphology of the samples were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM), which revealed a highly crystalline nature and excellent morphology, respectively. The Debye–Scherrer formula was employed to determine the average crystallite size of samples, which ranged from 12.923 to 10.818&#xa0;nm. The compositional purity of the sample is verified by X-ray photoelectron spectroscopy (XPS) examination. The samples’ purity and formation are also disclosed by Raman spectra. UV spectra verify that the optical band gap reduced and the intensity of optical absorption increased with dopant. The photoluminescence (PL) spectra reveal a significant change in luminescence intensity with doping. Dielectric investigations show that doping increases the dielectric constant, tangent loss, and ac conductivity. According to the results, NiO doped with metal (Fe, Co) is a good option for effective application in optoelectronics and spintronics devices.</p>

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Exploring the effect of metal (Fe and Co) doping on optical and dielectric properties of NiO nanoparticles for optoelectronics devices

  • 期刊论文

  • 发表日期：

    2026年3月25日

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  • Abdul Ghaffar,
  • Hadia Noor

摘要

In this study, the co-precipitation approach has been effectively used to synthesize pure NiO, Fe-doped NiO, and Co-doped NiO nanoparticles with 2% of dopant. The crystal structure and morphology of the samples were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM), which revealed a highly crystalline nature and excellent morphology, respectively. The Debye–Scherrer formula was employed to determine the average crystallite size of samples, which ranged from 12.923 to 10.818 nm. The compositional purity of the sample is verified by X-ray photoelectron spectroscopy (XPS) examination. The samples’ purity and formation are also disclosed by Raman spectra. UV spectra verify that the optical band gap reduced and the intensity of optical absorption increased with dopant. The photoluminescence (PL) spectra reveal a significant change in luminescence intensity with doping. Dielectric investigations show that doping increases the dielectric constant, tangent loss, and ac conductivity. According to the results, NiO doped with metal (Fe, Co) is a good option for effective application in optoelectronics and spintronics devices.