Effect of laser energy density on ZnO / α- Al2O3 of films grown by pulsed laser deposition
Khaled M. Chahrour,
Amer B. Dheyab,
Mohammad J .Haider,
Ali K. Shakir,
Afnan K. Yousf,
Adawiya J. Haider
Abstract
In this work, Pulsed Laser Deposition (PLD) was employed for preparation of the thin films of Zinc Oxide on Sapphire α- Al2O3 (0001). The effect of laser energy density on the structure and optical characterizations of the ZnO films have been studied by X-Ray diffraction (XRD), and Scanning Electron Microscopy (SEM). The results showed that crystalline and (002)-oriented ZnO films were obtained at laser fluence 0.8, 1.6, and 2.4J/cm2 and the optimized growth ZnO films were at substrate temperature of 400 oC.Optical transmission for all films was around 85-90% within the visible region of the spectrum.
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