Author : Abdulla Hassan, Najiba
journal of kerbala university,
Volume 5, Issue 3, Pages 224-230
Undoped and Al doped ZnO samples with 1.05 wt% of Al were synthesized by magnetron sputtering method. We have studied optical properties of the samples in spectral range (300 – 900)nm.The XRD spectra shows that the films have polycrystalline structure with hexagonal phase. Al impurities do not causes observable action on structure of the films , but it reduce the optical transmittance of ZnO and reduce also optical band gap (Eg) from 3.2 eV to 2.8607 eV . Reflectance, Extinction Coefficient (K0), Absorption Coefficient (α) and Refractive index (n) have higher values for ZnO:Al compared with that for ZnO.