ABSTRACT Cu2+ ion-doped ZnO nanoparticles were elaborated using a low cost-effective polyol method. The structural and morphological analysis of the samples was investigated using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The dielectric and electrical properties have highlighted the dependence of frequency and temperatures on dielectric parameters using impedance spectroscopy. The results obtained showed that Cu-doped ZnO Nps have a high dielectric constant and low dielectric loss as compared to pure ZnO. Compared with pure ZnO, the photoluminescence in Cu-doped ZnO Nps shows that UV emission peak shifts to lower energy and its intensity increases which is ascribed to the increases of defect density in the band gap. In addition, this enhancement in luminescence proves the large surface-to-volume produced after doping, which verified the high responsivity of our work. These important dielectric and optoelectronics properties for Cu-doped ZnO Nps make them interesting material for use in UV photodetector.

中文翻译：

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Cu2+ 的光电导、介电和光致发光特性：多元醇法制备的 ZnO 纳米颗粒

摘要 Cu2+ 离子掺杂的 ZnO 纳米粒子是使用低成本的多元醇方法精心制作的。使用 X 射线衍射 (XRD) 和透射电子显微镜 (TEM) 研究样品的结构和形态分析。使用阻抗谱，介电和电特性突出了频率和温度对介电参数的依赖性。获得的结果表明，与纯 ZnO 相比，Cu 掺杂的 ZnO Nps 具有高介电常数和低介电损耗。与纯 ZnO 相比，Cu 掺杂的 ZnO Nps 中的光致发光表明紫外发射峰向较低能量移动并且其强度增加，这归因于带隙中缺陷密度的增加。此外，这种发光的增强证明了掺杂后产生的大表面体积比，这验证了我们工作的高度响应性。Cu 掺杂的 ZnO Nps 的这些重要介电和光电子特性使其成为用于紫外光电探测器的有趣材料。