Structural and optical properties of Mg-doped ZnO films obtained by spray pyrolysis

Ekaterina S. Rembeza; Sirojiddin Z. Zaynobiddinov; Markhabo B. Rasulova

doi:10.17308/kcmf.2025.27/12807

Ekaterina S. Rembeza Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0003-0811-0979
Sirojiddin Z. Zaynobiddinov Andijan State University, 129 Universitet st., Andijan city 170100, Republic of Uzbekistan https://orcid.org/0000-0003-2943-5844
Markhabo B. Rasulova Andijan State University, 129 Universitet st., Andijan city 170100, Republic of Uzbekistan; Andijan Mashinasozlik Institute, 56 Baburshok st., Andijan city 170119, Republic of Uzbekistan

DOI: https://doi.org/10.17308/kcmf.2025.27/12807

Keywords: ZnO thin films, Mg doping, Spray pyrolysis method, Structural properties, Optical properties

Abstract

Purpose: The paper aims to determine the optimal technological conditions for preparing metal oxide films by spray pyrolysis, as well as to study their structural and optical parameters. Zinc oxide thin films have an important combination of properties for practical application including transparency in the visible range of electromagnetic radiation and low electrical resistance which is provided by a large value of the bandgap width and by obtaining non-stoichiometric compositions or by introducing appropriate alloying elements. The possibility of practical application of ZnO thin films also depends on their optical and electrical properties.

Methods: Thin films of unalloyed zinc oxide as well as ZnO films doped with magnesium with different percentages from 1 to 15 at. % were prepared by spray pyrolysis. Structural and optical properties of magnesium-doped zinc oxide thin films were studied. Through X-ray diffraction analysis it was found that all films are polycrystalline with hexagonal wurtzite structure and crystallographic orientation (002) aligned or oriented along the plane of the substrate.

Conclusions: Studies of optical properties by UV-visible spectrophotometry showed that transmittance of magnesium-doped zinc oxide thin films increased from 70 to about 85 %, and the bandgap width increased from 3.20 to 3.42 eV. These properties of magnesium-doped ZnO thin films demonstrate their high potential for efficient use in many optoelectronic devices and instruments such as solar cells, gas sensors, allow their use as photocatalysts, etc

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Author Biographies

Ekaterina S. Rembeza, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

Dr. Sci. (Phys.-Math.), Professor at the Department ofGeneral Physics, Voronezh State
University (Voronezh, Russian Federation)

Sirojiddin Z. Zaynobiddinov, Andijan State University, 129 Universitet st., Andijan city 170100, Republic of Uzbekistan

Dr. Sci. (Phys.-Math.), Professor, Academician of the Academy of Sciences of the
Republic of Uzbekistan (Andijan, Republic of Uzbekistan)

Markhabo B. Rasulova, Andijan State University, 129 Universitet st., Andijan city 170100, Republic of Uzbekistan; Andijan Mashinasozlik Institute, 56 Baburshok st., Andijan city 170119, Republic of Uzbekistan

Doctoral student of the Andijan Engineering Institute (Andijan, Republic of Uzbekistan)

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