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<p>In this study, we report the synthesis of undoped and Ga-doped ZnO nanoparticles using the sol–gel method, with gallium concentrations ranging from 0.0 to 5.0 at%. The impact of Ga incorporation on the structural and electrical properties of the samples was systematically investigated. X-ray diffraction (XRD) analysis confirmed the formation of hexagonal wurtzite ZnO nanopowders, with crystallite sizes varying between 20 and 35&#xa0;nm. Rietveld refinement further verified the hexagonal wurtzite ZnO phase within the P6<sub>3</sub>mc space group. Morphological analysis indicated that the crystallites exhibit a hexagonal shape. The electrical properties were evaluated using impedance spectroscopy, revealing a strong dependence on temperature and frequency. Notably, electrical conductivity increased with Ga doping, reaching its maximum at 3.0 at% Ga content.</p>

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Investigation of the structural, optical and electrical conductivity properties of Ga-doped ZnO nanoparticles

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Hayet Mahdhi,
  • Nesrine Haddad,
  • Najib Ihzaz,
  • Zouhaier Ben Ayadi

摘要

In this study, we report the synthesis of undoped and Ga-doped ZnO nanoparticles using the sol–gel method, with gallium concentrations ranging from 0.0 to 5.0 at%. The impact of Ga incorporation on the structural and electrical properties of the samples was systematically investigated. X-ray diffraction (XRD) analysis confirmed the formation of hexagonal wurtzite ZnO nanopowders, with crystallite sizes varying between 20 and 35 nm. Rietveld refinement further verified the hexagonal wurtzite ZnO phase within the P63mc space group. Morphological analysis indicated that the crystallites exhibit a hexagonal shape. The electrical properties were evaluated using impedance spectroscopy, revealing a strong dependence on temperature and frequency. Notably, electrical conductivity increased with Ga doping, reaching its maximum at 3.0 at% Ga content.