Farzad Faramarzi - Influence of Number of Depositions on Some Structural Properties of  ZnO Nanostructured Thin Films Prepared by Sol-Gel Method

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      Submitted at The Annual Physics Conference of Iran   2013


      In this   experimental work, the sol-gel process accompanying dip-coating   technique has been used in a sol comprising, zinc acetate   dehydrate, isopropanol and diethanol   amine as precursor, solvent and stabilizer, respectively for   preparation of zinc oxide films on glass substrates.  Before   examining the physical properties, layers have been undergone an   annealing process in order to increase their quality. In   this project, a number of thin zinc oxide layers with optimized   thicknesses have been prepared from a solution with a   concentration of 1.15moles per liter by sol-gel technique and   annealed at 500oC. Then, some structural parameters   such as thickness, XRD pattern, grain size and SEM micrographs   taken from the samples with different number of depositions have   been measured and the obtained results have been   compared. XRD   analyses show that the produced films are polycrystalline and   have nanocrystalline structure with grains having diameters in   the range 35-43 nm. By increasing the number of depositions,   grains become larger, more crystalline and less   porous. SEM micrographs and XRD   reveals that by increasing the number of depositions,   crystallinity and periodicity of zinc oxide crystal lattice as   well its grain sizes are increased.


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