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<p>The spray pyrolysis approach was utilized to deposit thin films of lithium doped zinc oxide on a glass substrate. This method is inexpensive, flexible, and easy. The precursor solution for zinc was zinc acetate, whereas the precursor solution for lithium was lithium acetate. To determine the influence of doping on the deposited thin films, X-ray diffraction and UV–Vis spectroscopy were used to examine the films’ structural and optical characteristics to determine the influence of doping on the deposited thin films. Structural properties demonstrate that the deposited ZnO films are purer and have considerably fewer imperfections, because of the nearly total chemical breakdown of the precursor droplets. The polycrystalline hexagonal wurtzite structure of the undoped and Li-doped ZnO films had a (002) preferred orientation. In the visible spectrum, the films demonstrated optical transmission of between 60 and 80%. The films were discovered to have pronounced UV absorption edges in the wavelength range of 350–450&#xa0;nm and to be transparent in the 450–900&#xa0;nm range. The optical band gap energies for the films were found to be between 3.32 and 3.40&#xa0;eV by the absorption edge analysis, and the electronic transition was of the direct transition type. The optical and structural characteristics of the deposited Lithium-ZnO thin films indicate that they can therefore be adjusted through this doping for device optimization in applications such as more affordable large-area solar cells, gas sensors, and piezoelectric devices.</p>

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Deposition and characterisation of spray pyrolysis deposited zinc oxide thin films doped with lithium for device applications

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Ajanaku Olanrewaju,
  • Olutimehin Divine

摘要

The spray pyrolysis approach was utilized to deposit thin films of lithium doped zinc oxide on a glass substrate. This method is inexpensive, flexible, and easy. The precursor solution for zinc was zinc acetate, whereas the precursor solution for lithium was lithium acetate. To determine the influence of doping on the deposited thin films, X-ray diffraction and UV–Vis spectroscopy were used to examine the films’ structural and optical characteristics to determine the influence of doping on the deposited thin films. Structural properties demonstrate that the deposited ZnO films are purer and have considerably fewer imperfections, because of the nearly total chemical breakdown of the precursor droplets. The polycrystalline hexagonal wurtzite structure of the undoped and Li-doped ZnO films had a (002) preferred orientation. In the visible spectrum, the films demonstrated optical transmission of between 60 and 80%. The films were discovered to have pronounced UV absorption edges in the wavelength range of 350–450 nm and to be transparent in the 450–900 nm range. The optical band gap energies for the films were found to be between 3.32 and 3.40 eV by the absorption edge analysis, and the electronic transition was of the direct transition type. The optical and structural characteristics of the deposited Lithium-ZnO thin films indicate that they can therefore be adjusted through this doping for device optimization in applications such as more affordable large-area solar cells, gas sensors, and piezoelectric devices.