Preparation of Zinc Oxide via Chemical Spray Pyrolysis and Investigation of Its Optical Properties

Section: Research Article
Issue
Vol. 35 No. 3 (2026): Volume 35, Issue 3
Pages
82-94

Keywords:

zinc oxide, CSP, absorption cofficient, energy gap

Abstract

In this paper, structural and optical properties of zinc oxide thin films prepared by the chemical spray pyrolysis technique were studied. The deposition process involved spraying a transparent chemical solution made from zinc nitrate dissolved in distilled water at a temperature of 50° C on a square glass substrate measuring 2.5 cm. The deposition process was conducted at 350° C and a pressure of 2 bar. The optical properties of zinc oxide were studied using UV-Vis across a wavelength range from 190 nm to 1100 nm. The result showed that the absorption values are more recognised in the ultraviolet region, between (375-380) nm, followed by a sharp decrease in the visible and infrared light regions, where the material exhibited high transparency. Moreover, the result showed that the same change occurred with the absorption coefficient, refraction, extinction, and other optical constants as a function of the wavelength for zinc oxide films. The energy gap of the zinc oxide films was found to be (3.25 eV) at the same temperature. X-ray diffraction (XRD) measurement showed that the structure of the zinc oxide material is pure and hexagonal. This analysis helped us to calculate the average crystallite size, which was found to be approximately 44.34 nm, the lattice constants a = b    3.2190 Å and c=5.1490 Å, the cell volume 46.21 ×106 pm3, the X-Ray density 5.85 g/cm3 of ZnO sample, the thickness of the film 300 nm, and the number of layers , the density of dislocations  =5.086 × 10-4 nm-2 , the number of crystals  and the Specific Surface Area .

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Authors

Diana Duraid Ablahad

Department of Physics, College of Education for Pure Sciences University of Mosul, 41001, Mosul, Iraq

Mutaz Salih Hasan Al-Jubbori

Department of Physics, College of Education for Pure Sciences, University of Mosul, Mosul, Iraq

Identifiers

DOI: 10.33899/jes.v35i3.61594

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[1]
“Preparation of Zinc Oxide via Chemical Spray Pyrolysis and Investigation of Its Optical Properties”, JES, vol. 35, no. 3, pp. 82–94, Jul. 2026, doi: 10.33899/jes.v35i3.61594.
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How to Cite

[1]
“Preparation of Zinc Oxide via Chemical Spray Pyrolysis and Investigation of Its Optical Properties”, JES, vol. 35, no. 3, pp. 82–94, Jul. 2026, doi: 10.33899/jes.v35i3.61594.