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Author: search.filters.author.Sinornate, WuttichaiSubject: search.filters.subject.Thin film

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    Structural, optical and electrical properties of Sb-doped ZnO/ZnO homojunction thin film structures prepared by sol-gel based coating process under nitrogen annealing atmosphere
    (2022-09-01)
    Sinornate, Wuttichai
    ;
    Mimura, Hidenori
    ;
    Pecharapa, Wisanu
    This investigation focuses on structural, optical and electrical properties of Sb-doped/undoped ZnO double layer structure annealed in nitrogen atmosphere. The double layer film was prepared by sol-gel spin coating technique onto ITO substrate then annealed in nitrogen atmosphere. The crystal structure demonstrates hexagonal ZnO without phase impurity. The deterioration in the crystal structure due to Sb is incorporated in ZnO lattice and nitrogen annealing atmosphere and the decrease in diffraction intensity due to the different thickness of the ZnO film. The existence of Sb atom in the doped ZnO film is confirmed by depth profile measurement. The transmittance spectra exhibit high transparency with interference fringe and the photoluminescence spectrum shows the near-band-edge emission of ZnO without any emission in the visible region. The electrical properties demonstrate diode characteristics and photocurrent under dark and UV irradiation, respectively.
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    Role of Sb-dopant on physical and optical properties of ZnO thin film deposited by sol-gel-based coating method
    (2019-01-01)
    Sinornate, Wuttichai
    ;
    Mimura, Hidenori
    ;
    Pecharapa, Wisanu
    Sb-doped ZnO films were prepared by sol-gel spin coating technique on glass substrate. The sol-gel was prepared from zinc acetate dihydrate as zinc precursor and diethanolamine as sol stabilizer. Antimony (III) acetate was selected as the precursor of Sb. The doping concentration was varied from 0 to 10 mol%. The films were prepared by spin coating technique following by annealing at 500°C for 2 h in ambient air. The XRD exhibits ZnO hexagonal wurtzite without impurity phase. Their XRD peaks show deterioration in crystallinity that is in accordance with FESEM and TEM images showing decreasing in particle size with increasing doping content. The XPS confirm the existence of Sb<sup>3+</sup> that could substitute Zn<sup>2+</sup> on the zinc site or zinc vacancy. The photoluminescence results exhibit blue-shift with increasing Sb doping concentration. The transmittance spectra show high transmittance above 90% in visible region.