Plain and embedded polyvinyl pyrrolidone (PVP)/ polyvinyl alcohol PVOH (1:1) with different weights of NiO nanoparticles (x = 0.037, 0.37and 3.7 wt%) films were formed by casting technique. The prepared nanocomposites were characterized by operating X-ray diffractometer, atomic force microscope (AFM) technique, UV-Vis.–NIR spectrophotometer, and optical limiting system. The structural examination reveals a considerable interaction between the PVP and PVOH as well as NiO nanoparticles. The AFM scans revealed that the surface roughness increases with the content of the dopant. Upon adding NiO nanoparticles to the PVP/PVOH blend matrix, the width of localized states (Urbach energy) increased and a redshift of the absorption edge was observed depending on the amount of doping, which allow the tailoring of the bandgap. The analysis revealed that the absorption index (k), dielectric constant, optical conductivity, dispersion parameters, and refractive index were altered by the NiO concentration. Also, tuning the nonlinear refractive index and the optical susceptibilities (x¹& x³) upon increasing NiO in the blend were allowed. The transmittance and the optical limiting properties of the films reflect the ability to candidates the PVP/PVOH with 3.7 wt% NiO as UV-Visible shielding. Thus, the NiO content makes the blend matrix effective use in various optical and optoelectronic applications.

通过流延技术形成了具有不同重量的 NiO 纳米粒子 (x = 0.037、0.37 和 3.7 wt%) 的普通和嵌入的聚乙烯吡咯烷酮 (PVP)/聚乙烯醇 PVOH (1:1) 薄膜。通过操作 X 射线衍射仪、原子力显微镜 (AFM) 技术、UV-Vis.-NIR 分光光度计和光学限制系统对制备的纳米复合材料进行了表征。结构检查揭示了 PVP 和 PVOH 以及 NiO 纳米粒子之间的显着相互作用。AFM 扫描显示表面粗糙度随着掺杂剂含量的增加而增加。将 NiO 纳米粒子添加到 PVP/PVOH 共混基质中后，局域态的宽度（Urbach 能量）增加，并且根据掺杂量观察到吸收边缘的红移，这允许调整带隙。k )、介电常数、光导率、色散参数和折射率因 NiO 浓度而改变。此外，允许在混合物中增加 NiO 时调整非线性折射率和光学磁化率 ( x ¹ & x ³ )。薄膜的透射率和光学限制特性反映了候选具有 3.7 wt% NiO 的 PVP/PVOH 作为紫外-可见光屏蔽的能力。因此，NiO 含量使混合基质有效地用于各种光学和光电应用。