Cuprous oxide (Cu₂O) thin films have been successfully electrodeposited onto indium tin oxide-coated glass substrates from copper acetate solution and characterized by x-ray diffraction analysis, scanning electron microscopy, ultraviolet–visible (UV–Vis) spectroscopy, and photoelectrochemical (PEC) and electrical Hall-effect measurements. The effect of the solution pH on the structural, morphological, optical, PEC, and electrical properties of the deposited Cu₂O thin films was investigated. The x-ray diffraction results indicated that the prepared Cu₂O films exhibited good crystallinity with pure cubic structure, while the crystallite size increased with increasing solution pH. The preferential orientation of the deposited films also changed with the pH value. When the solution pH was changed, the surface morphology changed from spherical to pyramidal shape with increasing grain size. The optical characteristics of the Cu₂O thin films were not significantly affected by changing the solution pH value. PEC measurements revealed that Cu₂O thin films prepared at pH 6.2 exhibited n-type conductivity, while those obtained at pH 11 showed p-type conductivity. These results were confirmed by Hall-effect measurements. The obtained Cu₂O thin films would be promising semiconductor materials for use in various applications such as PEC cells and photovoltaic solar cells.

氧化亚铜（Cu ₂ O）薄膜已成功地从醋酸铜溶液中电沉积到镀有铟锡氧化物的玻璃基板上，并通过X射线衍射分析，扫描电子显微镜，紫外可见（UV-Vis）光谱和光电化学进行表征（PEC）和电霍尔效应测量。研究了溶液pH对沉积的Cu ₂ O薄膜的结构，形态，光学，PEC和电性能的影响。X射线衍射结果表明，所制备的Cu ₂O膜表现出良好的结晶度，具有纯立方结构，而微晶尺寸随溶液pH值的增加而增加。沉积膜的优先取向也随pH值变化。当溶液的pH值改变时，随着晶粒尺寸的增加，表面形态从球形变为金字塔形。改变溶液的pH值不会显着影响Cu ₂ O薄膜的光学特性。PEC测量显示，在pH 6.2下制备的Cu ₂ O薄膜表现出n型电导率，而在pH 11下获得的薄膜表现出p型电导率。这些结果通过霍尔效应测量得到证实。所得的Cu ₂O薄膜将是用于各种应用中的有前途的半导体材料，例如PEC电池和光伏太阳能电池。