The ultraviolet–visible (UV–Vis) range (200–800 nm) optical behaviour of nanocomposite films consisted of poly (vinyl pyrrolidone)/poly (vinyl alcohol) (PVP/PVA) blend matrix and alumina (Al₂O₃) nanofiller (1–5 wt%) was characterized for their eco-friendly green technology-based optoelectronic device applications. Absorbance, transmittance, and reflectance spectra of the (PVP/PVA)/Al₂O₃ films were analyzed to determine absorption coefficient, energy band gaps (direct and indirect), and Urbach energy. The non-linear decrease in band gap values of these composites with increasing amount of Al₂O₃ in the polymer matrix was explained. The wavelength-dependent values of refractive index, extinction coefficient, complex dielectric permittivity, and optical conductivity of these hybrid nanocomposites enhanced non-linearly with increasing filler concentration, as well as the dispersive energy, single oscillator strength, and optical susceptibility increased gradually. All these optical parameters values of the (PVP/PVA)/Al₂O₃ nanocomposites are found controllable by Al₂O₃ contents and reasonably comparable with the results of other similar types of composites.

纳米复合膜的紫外-可见（UV-Vis）范围（200-800 nm）光学行为由聚（乙烯基吡咯烷酮）/聚（乙烯醇）（PVP / PVA）混合基质和氧化铝（Al ₂ O ₃）纳米填料组成（1-5 wt％）的特点是其基于绿色技术的环保型光电设备应用。分析（PVP / PVA）/ Al ₂ O ₃薄膜的吸收光谱，透射光谱和反射光谱，以确定吸收系数，能带隙（直接和间接）和Urbach能量。随着Al ₂ O ₃含量的增加，这些复合材料的带隙值呈非线性下降趋势解释了聚合物基体中的化合物。这些杂化纳米复合材料的折射率，消光系数，复介电常数和光导率随波长的变化随着填料浓度的增加而非线性增加，色散能，单振子强度和光化率逐渐增加。发现（PVP / PVA）/ Al ₂ O ₃纳米复合材料的所有这些光学参数值可由Al ₂ O ₃含量控制，并且可以与其他类似类型的复合材料的结果合理地比较。