Journal of Nanoscience and Nanoengineering
Articles Information
Journal of Nanoscience and Nanoengineering, Vol.1, No.4, Dec. 2015, Pub. Date: Jan. 9, 2016
Structural, Morphological and Optical Properties of Sol-Gel Spin Coated Al-doped Zinc Oxide Thin Films
Pages: 259-264 Views: 1000 Downloads: 1249
[01] R. V. Vidap, Department of Electronic Science, Modern College of Arts, Science & Commerce, Pune, MS, India.
[02] S. S. Bandgar, Department of Electronics, DBF Dayanand College of Arts & Science, Solapur, MS, India.
[03] G. S. Shahane, Department of Electronics, DBF Dayanand College of Arts & Science, Solapur, MS, India.
A sol-gel spin coating method has been successfully used to synthesize Al-doped ZnO thin films. The XRD studies show synthesis of phase pure ZnO thin films with hexagonal wurtzite structure. The lattice parameters are a=3.2568Å and c=5.2108Å. Al-doping enhances the preferential growth along (002) direction. The lattice parameters decrease with increase in Al-doping concentration. SEM studies show that with Al-doping the growth of the films takes place with porous structure embedded with nanogranules overgrown on the folded structure. This indicates that Al-doping has an influence on the surface morphology of the films. AFM studies show that the maximum surface roughness of the film increases with Al-doping concentration. Optical study revealed that band gap of ZnO is 3.25 eV with direct band to band transitions and decreases with Al-doping concentration. The properties of ZnO thin films can be effectively tailored with Al-doping. These synthesized Al-doped ZnO thin films can be effectively used in photocatalysis and gas sensor applications.
Zinc Oxide Thin Films, Structural Characterization, Optical Properties
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