Open AccessStructural and Optical Properties of Cobalt-Doped Zinc Oxide Thin Films Prepared By Spray Pyrolysis Technique
Author(s) -
Baghdad Science Journal
Publication year - 2010
Publication title -
mağallaẗ baġdād li-l-ʿulūm
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.167
H-Index - 6
eISSN - 2411-7986
pISSN - 2078-8665
DOI - 10.21123/bsj.7.1.69-75
Subject(s) - wurtzite crystal structure , materials science , crystallite , zinc , lattice constant , thin film , absorbance , band gap , texture (cosmology) , transmittance , doping , dopant , analytical chemistry (journal) , cadmium acetate , cobalt , grain size , chemical engineering , diffraction , metallurgy , optics , chemistry , nanotechnology , optoelectronics , cadmium , organic chemistry , chromatography , physics , artificial intelligence , computer science , image (mathematics) , engineering
Undoped and Co-doped zinc oxide (CZO) thin films have been prepared by spray pyrolysis technique using solution of zinc acetate and cobalt chloride. The effect of Co dopants on structural and optical properties has been investigated. The films were found to exhibit maximum transmittance (~90%) and low absorbance. The structural properties of the deposited films were examined by x-ray diffraction (XRD). These films, deposited on glass substrates at (400? C), have a polycrystalline texture with a wurtzite hexagonal structure, and the grain size was decreased with increasing Co concentration, and no change was observed in lattice constants while the optical band gap decreased from (3.18-3.02) eV for direct allowed transition. Other parameters such as Texture Coefficient (Tc), dislocation density (?) and number of crystals (M) were also calculated .