Science Journal of Physics
June 2015, Volume 2015, ISSN:2276-6367
© Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.
Research Article
Synthesis and Effect of Thickness on the Structure and Optical Properties of ZnO Thin Films Prepared By Sol-Gel Spin Coating Method
Saad . A . Jaber1 , Hussein F. Hussein2 and H.Bakr3
Department of Physics College of Education for pure Science , Basrah University , Basrah ,Iraq
*Education Directorate of Basrah Governorate , Basrah ,Iraq
Accepted on May 29, 2015; Available Online 11 June 2015
doi: 10.7237/sjp/222
Abstract:
In this work , (ZnO) films are prepared by (sol-gel) method . Zinc Oxide (ZnO) thin films was growth on to hot glass substrate at 60 oC temperature by spin coating. Then samples were annealed at temperature (450) șC with three thicknesses (58 ,69 and 77)nm for 1 hr. The experimental diffraction angleθ and d-spacing values are in agreement with the standard ASTM data for all thin film thicknesses .The structure parameters like lattice parameter (a); grain size (D) ; dislocation density (σ); micro strain (ε )are calculated . The absorbance (A) , transmittance (T) and reflectance (R) are recorded in the range (300 - 1000) nm , and used to calculate the refractive index (n) , extinction coefficient (k) , band gap (Eg) , optical conductivity (σopt ) , complex dielectric constant ( ε1 ,ε 2 ,ε∞), relaxation time () , average interband oscillator wave length (λo) , average oscillator strength (So) , (N/m*), dissipation factor (tanδ) and the optical dispersion parameters (Eo , Ed) were determined.
Keyword:Zinc Oxide ; Sol-Gel ; thin films ; X-ray diffraction , structure parameters ,Optical properties.