Document Type : Research Paper
Authors
Tikrit University - College of Education
10.37652/juaps.2012.62764
Abstract
ZnO thin films have been deposited onto glass substrate by the spray pyrolysis method. Spectrum of x-ray diffraction for films of ZnO prepared by concentration (0.3M) has been studied. Also the spectrum shows that the films are crystalline in the structure in the wurtzite phase and by orientation (100) at angle (2θ=32.52°). The optical constants of ZnO thin films (such as refractive index (n) and extinction coefficient (k) within the wave length (300-900)nm are also studied. From transmittance spectrum (in the ultraviolet- visible- near infrared) (UV-VIS-NIR) regions using envelope method. The energy band gap of the films was evaluated as 3.31eV and found that the thickness is 831nm. The band gap and optical constants decreases after thermal annealing in air, also the band gap of ZnO thin films doped with Co decreases
Keywords
Main Subjects
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