Synthesis, characterization and study of the properties of zinc oxide-based nanocomposites

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dc.contributor.authorBenrezgua Elhadj
dc.date.accessioned2021-07-18T09:01:42Z
dc.date.available2021-07-18T09:01:42Z
dc.date.issued2021
dc.description.abstract: In the present work, pure ZnO and copper-doped zinc oxide (CZO) thin films at different contents (x) were synthesized by sol–gel spin coating process and investigated using various techniques. All samples exhibited a polycrystalline with wurtzite hexagonal phase. The grain size increased and changed its growth mode from c-axis growth to lateral one and the surface morphology was strongly influenced by Cu doping. Optical properties of CZO thin films were investigated. As x increased, the transparency of films was generally increased in the visible region and the band gap energy (Eg) presented a slight shrinking. Ferromagnetic phase was adopted within density functional theory corrected by Hubbard method (DFT+LDA+U) to investigate the properties of pure and CZO structure. The closest Cu impurities gave the more stable configuration. Cu3d states were distributed around Fermi level inducing a major contribution to the magnetic moment. A mix of ionic and covalent bonding was remarked. DFT+LDA+U enhanced significantly the calculated Eg, which presented a narrowing with x. The imaginary part of the dielectric functions presented three main peaks and the static dielectric constants were slightly influenced by Cu dopingen_US
dc.identifier.urihttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/25084
dc.publisherUniversité de M'silaen_US
dc.subjectDensity Functional Theory; Copper-doped zinc oxide thin films; Sol-gel technique; Magnetic phase; Spin coating method; LDA+U approachen_US
dc.titleSynthesis, characterization and study of the properties of zinc oxide-based nanocompositesen_US
dc.typeThesisen_US

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