Substrate Temperature Effect on Structural and Optical Properties of ZnO Thin Films Deposited by Spray Pyrolysis

Abstract:

In this work, ZnO thin films grown on heated glass substrates in a temperature range of 300 to 500 °C with a 50°C step. The prepared solution is composed of methanol and zinc acetate Zn(CH₃COO)₂.2H₂O. ZnO thin films are deposited by pyrolysis spray technique, our work focuses on the study of the substrate temperature influence on the structural and optical properties of these layers. Therefore, The X-ray diffraction, showed a Wurtzit hexagonal structure of elaborated films, with (002) as a preferred orientation, and a grain size of 64 to 74 nm. The optical transmission spectroscopy UV-Visible, illustrated an increase of optical band gap from 3.19 to 3.25 eV, proportionally with the substrate temperature.

• Periodical: Defect and Diffusion Forum (Volume 397)
• Pages: 1-7
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.397.1
• Online since: September 2019
• Authors: Hassene Nezzari*, Riad Saidi, Adel Taabouche, Meriem Messaoudi, Mohamed Salah Aida
• Keywords: Band Gap, Crystalline Structure, Spray Pyrolysis, Substrate Temperature, ZnO Thin Films

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