Induced crystallization and enhanced light absorption and optical conduction in WO3 films via pulsed laser welding technique

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dc.authoridAtef Fayez Qasrawi / 0000-0001-8193-6975en_US
dc.authorscopusidAtef Fayez Qasrawi / 6603962677en_US
dc.authorwosidAtef Fayez Qasrawi / R-4409-2019en_US
dc.contributor.authorAlfhaid, Latifah Hamad Khalid
dc.contributor.authorQasrawi, Atef Fayez
dc.date.accessioned2023-04-17T06:57:18Z
dc.date.available2023-04-17T06:57:18Z
dc.date.issued2023en_US
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.description.abstractHerein amorphous WO3 thin films prepared by the thermal evaporation technique under a vacuum pressure of 10? 5 mbar are treated via pulsed laser welding technique (PLW) in an argon atmosphere. An induced crystallization process within one second for a spot of diameter of 2 mm is achieved via this technique. The crystalline films exhibited hexagonal structure and showed cuboid grains of dimensions of (length × width) 4.6 × 1.1 (?m)2. In addition, the PLW treated tungsten oxide thin films exhibited enhanced light absorbability reaching 90 times at 3.09 eV. Moreover in addition to the existing indirect energy band gap (3.50 eV) of WO3 films, the PLW treatment resulted in formation of another direct energy band gap of value of 1.92 eV. The pulsed laser welding of the WO3 films increased the optical conductivity of the films by 66 times and shifted the plasmon frequency from 0.19 to 6.99 GHz. The free charge carrier density also increased by two orders of magnitude. On the other hand, the impedance spectroscopy studies have shown domination of negative capacitance effect in samples treated with PLW technique. The conversion of the structure of the films from amorphous to polycrystalline that is associated with enhanced light absorption and improved optical conduction which is achieved within 41 s for a large area of 1.25 cm2 of the films is accounted as a smart new approach for improving the physical properties of thin films.en_US
dc.identifier.citationAlfhaid, L. H. K., & Qasrawi, A. F. (2023). Induced crystallization and enhanced light absorption and optical conduction in WO3 films via pulsed laser welding technique. Optical and Quantum Electronics, 55(5) doi:10.1007/s11082-023-04738-4en_US
dc.identifier.doi10.1007/s11082-023-04738-4en_US
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85151375970en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage451en_US
dc.identifier.urihttps://doi.org/10.1007/s11082-023-04738-4
dc.identifier.urihttps://hdl.handle.net/20.500.12713/3899
dc.identifier.volume55en_US
dc.identifier.wosWOS:000957590800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorQasrawi, Atef Fayez
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofOptical and Quantum Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectWO3 Thin Filmsen_US
dc.subjectPulsed Laser Weldingen_US
dc.subjectInduced Crystallizationen_US
dc.subjectEnhanced Absorptionen_US
dc.titleInduced crystallization and enhanced light absorption and optical conduction in WO3 films via pulsed laser welding techniqueen_US
dc.typeArticleen_US

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