| Growth of ZnO Films in Sol-Gel Electrophoretic Deposition by Different Solvents |
| Paper ID : 1501-UFGNSM-FULL |
| Authors: |
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Amir Mohammad Hallajzadeh1, H. Abdizadeh2, Mahtab Taheri3, M.R. Golobostanfard *3 1No.7, Akbari alley, Ghazvin st. 21 School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran 2 Center of Excellence for High Performance Materials, University of Tehran, Tehran, Iran 3School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran |
| Abstract: |
| This article introduces a process to fabricate zinc oxide (ZnO) films through combining sol preparation and electrophoretic deposition (EPD). The experimental results have proved that the EPD process is a powerful route to fabricate ZnO films with desire thickness from stable colloidal suspension in a direct current (DC) electric field. In this method, ZnO sol is prepared by dissolving zinc acetate dehydrate (ZAD) as the main precursor and diethanolamine (DEA) as the additive in various solvents such as methanol (MeOH), ethanol (EtOH), and 2-proponal (2-PrOH). The deposition was performed under a constant voltage of 30 V for 2 min. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and diffuse reflectance spectroscopy (DRS) were used to characterize ZnO films. XRD pattern of the ZnO film prepared by MeOH showed the highest degree of orientation and this is mainly attributed to the higher dielectric constant of the MeOH which results in higher current density in electrophoretic deposition. The cross section view of SEM images also show that the thickness of the ZnO film enhances by decreasing the solvent chain length. According to SEM results, as the viscosity of the medium increased, more compact layers were formed which can be attributed to the lower deposition rates in heavier alcohols. |
| Keywords: |
| Zinc Oxide, Sol-gel, Electrophoretic Deposition, Solvent |
| Status : Paper Accepted (Poster Presentation) |
