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Abstract <p>Zinc oxide (ZnO) nanoparticles were substituted with Al in the ratio of 0 to 0.1 and synthesized using co-precipitation. Nanoparticles were characterized by X-ray diffraction and UV-visible spectroscopy. The synthesized nanoparticles of ZnO have shown a wurtzite structure. The crystallite sizes of pure and ZnO nanoparticles substituted with Al were calculated with the help of Debye–Scherrer’s equation. With the rise in Al concentration doping, there is a reduction in the nanoparticles average crystallite size. It was observed that the DC conductivity increases as temperature and Al concentration rise. The dielectric constant ε, and dielectric loss, tan δ rise with temperature rise. Complex impedance analysis distinguishes the grain and grain boundary contribution to the material. The UV-Vis spectrum has shown that as the Al doping concentration increased, Urbach energy increased, and optical conductivity was highest when 0.03 of Al was doped in ZnO&#xa0;(ZA03).</p>

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Effect of Temperature on Dielectric, Impedance, and Optical Properties of Al-Doped ZnO by Wet-Chemical Process

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • C. Kalyani,
  • I. V. Subba Reddy,
  • P. Raju

摘要

Abstract

Zinc oxide (ZnO) nanoparticles were substituted with Al in the ratio of 0 to 0.1 and synthesized using co-precipitation. Nanoparticles were characterized by X-ray diffraction and UV-visible spectroscopy. The synthesized nanoparticles of ZnO have shown a wurtzite structure. The crystallite sizes of pure and ZnO nanoparticles substituted with Al were calculated with the help of Debye–Scherrer’s equation. With the rise in Al concentration doping, there is a reduction in the nanoparticles average crystallite size. It was observed that the DC conductivity increases as temperature and Al concentration rise. The dielectric constant ε, and dielectric loss, tan δ rise with temperature rise. Complex impedance analysis distinguishes the grain and grain boundary contribution to the material. The UV-Vis spectrum has shown that as the Al doping concentration increased, Urbach energy increased, and optical conductivity was highest when 0.03 of Al was doped in ZnO (ZA03).