کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
846121 | 1470600 | 2015 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of optical gap energy on the Urbach energy in the undoped ZnO thin films Effect of optical gap energy on the Urbach energy in the undoped ZnO thin films](/preview/png/846121.png)
The ZnO thin films were prepared with different precursor molarities by ultrasonic spray and spray pyrolysis techniques on glass substrate at 350 °C. The thin films were deposited at different substrate temperatures ranging between 0.02 and 0.125 M. In this paper we focused our attention on the present a new approach to correlate the Urbach energy, this correlation based on experimental data were published previously. The measurement of the Urbach energy of undoped ZnO thin films were realized at different model proposals; these measurements shows that the Urbach energy of the films can be estimated by varying the optical gap energy and the concentration of ZnO solution. The best estimated results are measured by Eqs. (2) and (3) with minimum relative error value was limited to 20%. Thus results indicate that the ZnO thin films are chemically purer and have many fewer defects and less disorder owing to an almost complete chemical decomposition.
Journal: Optik - International Journal for Light and Electron Optics - Volume 126, Issues 15–16, August 2015, Pages 1487–1490