Enhanced structural, optical and electrical properties of polycrystalline WO3 thin films achieved by aluminum nanosheets coating

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dc.authoridQasrawi, A. F./0000-0001-8193-6975
dc.contributor.authorQasrawi, A. F.
dc.contributor.authorKhanfar, Hazem K.
dc.date.accessioned2024-05-19T14:38:56Z
dc.date.available2024-05-19T14:38:56Z
dc.date.issued2024
dc.departmentİstinye Üniversitesien_US
dc.description.abstractHerein the effects of aluminum nanosheets on the structural, morphological, optical and electrical properties of tungsten oxide thin films are reported. Polycrystalline phase of the thermally evaporated WO3 was achieved by the pulsed laser welding technique. The polycrystalline films are then coated with Al nanosheets of thicknesses of 100 nm and 150 nm by the ion coating technique. It is observed that Al induces the domination of the hexagonal structure of WO3 over the tetragonal. Associated with the enhanced crystallinity the light absorption in the films increased by more than 60% and the energy band gap narrowed significantly. Namely the energy band gap of the as grown WO3 decreased from 3.15 eV to 2.85 eV and 2.59 eV as the Al layer thickness increased from 100 to 150 nm, respectively. It is also observed that crystalline films of WO3 exhibited lower electrical resistivity compared to films fabricated by other techniques. The temperature dependent electrical resistivity measurement was carried out in the temperature range of 310-420 K. It showed room temperature values of 2.5 ( Omega cm), 2.2 ( Omega cm) and 1.9 ( omega cm) and impurity levels centered at 0.25 eV, 0.34 eV and 0.16 eV for uncoated and films coated with Al nanosheets of thicknesses of 100 nm and 150 nm, respectively. The enhanced crystallinity that is accompanied with narrower energy band gap and lower electrical resistivity values make crystalline WO3 films promising for optoelectronic applications.en_US
dc.description.sponsorshipIstinye University; Deanship of Scientific Research (DSR) at Arab American University, Jenin, Palestineen_US
dc.description.sponsorshipThis project was funded by the Deanship of Scientific Research (DSR) at Arab American University, Jenin, Palestine and by Istinye University, Istanbul TR. The authors therefore acknowledge both institutes with thanks.en_US
dc.identifier.doi10.1088/1402-4896/ad3156
dc.identifier.issn0031-8949
dc.identifier.issn1402-4896
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-85188339046en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org10.1088/1402-4896/ad3156
dc.identifier.urihttps://hdl.handle.net/20.500.12713/4653
dc.identifier.volume99en_US
dc.identifier.wosWOS:001188049800001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofPhysica Scriptaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz20240519_kaen_US
dc.subjectAl Nanosheetsen_US
dc.subjectWo3en_US
dc.subjectHexagonalen_US
dc.subjectBand Gapen_US
dc.subjectResistivityen_US
dc.titleEnhanced structural, optical and electrical properties of polycrystalline WO3 thin films achieved by aluminum nanosheets coatingen_US
dc.typeArticleen_US

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