Composite films of poly (vinyl alcohol) PVA doped with various weight ratios of Cu(NO₃)₂.3H₂O (0, 1, 5, 10 and 20) wt% have been prepared by solution casting method. Using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Ultraviolet–Visible (Uv-Vis) spectroscopy, the synthetic composites were analyzed. The findings showed that Cu(NO₃)₂.3H₂O interacts with the hydroxyl group present in PVA chain. The XRD analysis revealed that after adding Cu(NO₃)₂.3H₂O, PVA crystallites were destroyed. With increasing Cu(NO₃)₂.3H₂O ratio, the absorbance of composite samples increased. The optical band gap energy of the composite samples was calculated using Tauc’s formula and it reduced by increasing dopant concentration. The dielectric modulus and ac conductivity of the composite films have been studied. Ac conductivity was found to increase by increasing the dopant concentration up to 10 wt%. Electrical conduction is carried out using correlated barrier hopping model.

通过溶液流延法制备了掺杂有各种重量比的Cu（NO ₃）₂ .3H ₂ O（0、1、5、10和20）wt％的聚乙烯醇PVA的复合膜。使用X射线衍射（XRD），傅立叶变换红外光谱（FT-IR）和紫外可见（Uv-Vis）光谱对合成复合材料进行了分析。结果表明，Cu（NO ₃）₂ .3H ₂ O与PVA链中存在的羟基发生相互作用。XRD分析表明，加入Cu（NO ₃）₂ .3H ₂ O后，PVA微晶被破坏。随着Cu（NO ₃）₂ .3H _2的增加O比率，复合样品的吸光度增加。使用Tauc公式计算复合样品的光学带隙能，并通过增加掺杂剂浓度降低其能带隙能。研究了复合膜的介电模量和交流电导率。发现通过将掺杂剂浓度增加至高达10重量％，可以提高AC电导率。使用相关的势垒跳跃模型进行导电。