THE DETERMINATION OF THE OPTICAL CONSTANTS OF THE ANNEALED ZNO THIN FILM AND DOPED WITH CO BY USING ENVELOPE METHOD | ||
| Journal of University of Anbar for Pure Science | ||
| Article 30, Volume 6, Issue 1, April 2012, Pages 121-129 PDF (874.35 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.37652/juaps.2012.62764 | ||
| Authors | ||
| MARWA TARIQ AHMED; SABRI JASSIM MOHAMMED; AYED NAJIM SALEH* | ||
| Tikrit University - College of Education | ||
| 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 | ||
| ZnO | ||
| References | ||
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