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<p>This paper details the synthesis of nanostructured undoped and nickel (Ni)-doped zinc oxide thin layers, both undoped and Ni-doped at concentrations of 0.5, 1, and 2 at%, using a co-precipitation and spin-coating method. The crystalline structure of synthesized samples was analyzed by x-ray diffraction, revealing a wurtzite-type hexagonal phase. Optical studies, particularly transmission measurements, highlighted a significant impact of Ni as an adding element. The UV-visible measurements indicated a noticeable bandgap shift from 3.39 eV before doping to 2.85 eV after Ni introduction. Furthermore, the photocurrent enhancement response was explained by a better charge separation and collection efficiency under visible light illumination.</p>

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Structural and Optoelectronic Properties of Ni-Doped ZnO-Based Thin Films Deposited by Co-precipitation Spin-Coating Method

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Moez Salem,
  • Amel Haouas,
  • Abdullah Almohammedi,
  • Hajar Ghannam

摘要

This paper details the synthesis of nanostructured undoped and nickel (Ni)-doped zinc oxide thin layers, both undoped and Ni-doped at concentrations of 0.5, 1, and 2 at%, using a co-precipitation and spin-coating method. The crystalline structure of synthesized samples was analyzed by x-ray diffraction, revealing a wurtzite-type hexagonal phase. Optical studies, particularly transmission measurements, highlighted a significant impact of Ni as an adding element. The UV-visible measurements indicated a noticeable bandgap shift from 3.39 eV before doping to 2.85 eV after Ni introduction. Furthermore, the photocurrent enhancement response was explained by a better charge separation and collection efficiency under visible light illumination.