Abstract
Different concentrations of copper-doped zinc oxide thin films were coated on a glass substrate by sol–gel/spin-coating technique. The structural properties of pure and Cu-doped ZnO films were characterized by different techniques, i.e., atomic force microscopy (AFM), photoluminescence and UV–Vis-NIR spectroscopy. The AFM study revealed that pure and doped ZnO films are formed as nano-fibers with a granular structure. The photoluminescence spectra of these films showed a strong ultraviolet emission peak centered at 392 nm and a strong blue emission peak cantered at 450 nm. The optical band gap of the pure and copper-doped ZnO thin films calculated from optical transmission spectra (3.29–3.23 eV) were found to be increasing with increasing copper doping concentration. The refractive index dispersion curve of pure and Cu-doped ZnO film obeyed the single-oscillator model. The optical dispersion parameters such as E o , E d , and \(n_{{\infty }}^{2}\) were calculated. Further, the nonlinear refractive index and nonlinear optical susceptibility were also calculated and interpreted.
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The authors would like to express their gratitude to King Khalid University, Saudi Arabia for providing administrative and technical support with Grant No. R.G.P.2/3/38.
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Ganesh, V., Salem, G.F., Yahia, I.S. et al. Synthesis, Optical and Photoluminescence Properties of Cu-Doped Zno Nano-Fibers Thin Films: Nonlinear Optics. J. Electron. Mater. 47, 1798–1805 (2018). https://doi.org/10.1007/s11664-017-5950-6
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DOI: https://doi.org/10.1007/s11664-017-5950-6