In this work, hydrothermal oxidation of electrodeposited zinc coatings is used to produce zinc oxide (ZnO) films. In the first step, zinc (Zn) coating is electrodeposited on indium tin oxide (ITO) coated glass substrate. The Zn films are then immersed in deionized water at [Formula: see text]C. The exposure time of Zn coating in deionized water is varied from 1[Formula: see text]h to 24[Formula: see text]h in sequence. At the 24[Formula: see text]h exposure time, X-ray diffraction (XRD) patterns reveal that zinc film has been completely converted to ZnO. Scanning electron microscope (SEM) results show morphological changes from flakes (for pure Zn) or 2D plates to rod (ZnO) like morphology which further changes to cotton-flower like shapes with an increase in oxidation time. Diffuse reflectance spectral measurements show the band gap tuning with oxidation time (it decreases from 3.28[Formula: see text]eV to 3.19[Formula: see text]eV). Photoluminescence (PL) spectra have depicted phonon replicas with energy separation of [Formula: see text][Formula: see text]meV for the ZnO films obtained after 6 and 12[Formula: see text]h exposure time in deionized water at [Formula: see text]C temperature.

中文翻译：

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氧化时间对 ITO 基板上电沉积 Zn 涂层的水热氧化制备的 ZNO 薄膜结构和光学性能的影响

在这项工作中，电沉积锌涂层的水热氧化用于生产氧化锌 (ZnO) 薄膜。在第一步中，将锌 (Zn) 涂层电沉积在涂有氧化铟锡 (ITO) 的玻璃基板上。然后将锌膜浸入[公式：见正文]C的去离子水中。Zn镀层在去离子水中的暴露时间从1[公式：见正文]h到24[公式：见正文]h依次变化。在 24[公式：见正文]h 曝光时间，X 射线衍射 (XRD) 图显示锌膜已完全转化为 ZnO。扫描电子显微镜 (SEM) 结果显示，从薄片（纯锌）或 2D 板到棒 (ZnO) 状形态的形态变化随着氧化时间的增加进一步变为棉花状形状。漫反射光谱测量显示带隙随氧化时间调谐（它从 3.28[公式：见文本]eV 降低到 3.19[公式：见文本]eV）。光致发光 (PL) 光谱描绘了声子复制品，其能量分离为 [公式：见文本][公式：见文本]meV，用于在去离子水中暴露 6 小时和 12 小时 [公式：见文本]h [公式: 见正文]C 温度。