4 research outputs found
Structural and optical modification of Ga-doped zinc oxide thin films induced by thermal annealing
236-240<span style="font-size:11.0pt;font-family:
" times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">Ga doped ZnO (ZnO:Ga) thin films were prepared by the sol-gel spin coating
technique. The films are annealed at different temperature varying from 500°C
to 900°C in controlled oxygen environment. The effects of annealing temperature
on structural, morphological and optical properties of films are investigated.
The XRD results show that all deposited films are textured along the (101)
direction and exhibits wurtzite phase of ZnO. The AFM images show that the
grain size of ZnO films increased with increasing annealing temperature. Red
shifting (band gap decreases) of the optical band gap is also observed on
increasing the temperature. The observations are explained on the basis of
stress and grain growth induced by thermal annealing.</span