Kirkuk Journal of Science

Kirkuk Journal of Science

Effect of Composition and Annealing on Structural and Optical Properties of (ZnO)1-X (TiO2)X Thin Films Prepared by Sol-Gel Method

Document Type : Research Paper

Authors
Huda L. Nida
Abdulkader J. Muhammad
Ali I. Salih
Department of Physics / College of Science / University of Kirkuk
10.32894/kujss.2015.105031
Abstract
The study describes effect of composition parameter, x, and annealing-temperature, Ta, on structural,and opticalproperties of (ZnO)1-x(TiO2)x thin-films prepared by sol-gel method. Experimental results are explained and theoretical equations are suggested for optical-energy-gap, Eg, and Urbach-energy, Eu in terms of their variation with (x) and (Ta).With increased xand Ta, Eg decreases whereas Eu increases. Thebehavior of Egwas explainedby evokingthatincreasingx will randomize thecrystalperiodicity, andthat annealingtemperature(400,500, and600)⁰Crelaxes the structuremoretowardsbettercrystallineforms. The increase of Eu with increased x was attributed to the lower mass of Ti ions as compared to that of Zn ions. Generally, makingcompositesdestroysthecrystalinityobservedin pureZnO andpureTiO2films butannealingdoesimprovethe qualityof the filmintermsofitsdegreeofcrystal structure.
Keywords
ZnO
TiO
film
composition
annealing
Energy
gap
Urbach
Kirkuk Journal of Science
Volume 10, Issue 3
Summer 2015
Page 303-319

  • Receive Date 01 September 2015
  • Revise Date 20 September 2015
  • Accept Date 25 September 2015