The purpose of this work is to investigate the optical constants of ZnO films doped by Cu, Al, and Cu-Al nanoparticles. The reflectance and the transmittance spectra measurements were applied for calculating these optical constants in the range of 200–2500 nm. It can be seen that ZnO films doped with Al nanoparticles have a maximum value nanoparticles size of about 23.73 nm. With increasing annealing temperature for all wavelength range, due to the improvement of crystalline structure and hence decreasing defects, the extinction coefficient of films decreased. The theoretical extrapolation of ε₁ versus λ² at low wavelengths values provides the dielectric constant ε_∞ and for the ZnO films doped with Cu nanoparticles, it has a maximum value of 4.61. The ZnO films doped by Al nanoparticles have a minimum value of \({\chi }_{c}\) in all energy range. The dissipation factor tan δ of ZnO films doped by Cu nanoparticles especially in high energy has a maximum value. SEL functions in ZnO films doped by Cu nanoparticles have the maximum value.

这项工作的目的是研究掺杂有Cu，Al和Cu-Al纳米粒子的ZnO薄膜的光学常数。反射率和透射率光谱测量值用于计算200–2500 nm范围内的这些光学常数。可以看出，掺杂有Al纳米颗粒的ZnO膜具有约23.73nm的最大值纳米颗粒尺寸。在所有波长范围内，随着退火温度的升高，由于晶体结构的改善以及缺陷的减少，薄膜的消光系数降低。ε的理论推断₁与λ ²在低波长值提供了介电常数ε _∞对于掺杂有Cu纳米颗粒的ZnO薄膜，其最大值为4.61。在所有能量范围内，Al纳米颗粒掺杂的ZnO膜的最小值为\（{\ chi} _ {c} \）。铜纳米颗粒掺杂的ZnO薄膜的耗散因子tanδ尤其是在高能量下具有最大值。Cu纳米颗粒掺杂的ZnO薄膜中的SEL函数具有最大值。