The effect of different rates of ultra-thin gossamer-like rGO coatings on photocatalytic performance in ZnO core-shell structures for optoelectronic applications

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dc.contributor.authorKırkbınar, Mine
dc.contributor.authorDemir, Ahmet
dc.contributor.authorAltındal, Şemsettin
dc.contributor.authorÇalışkan, Fatih
dc.date.accessioned2023-07-26T11:54:15Z
dc.date.available2023-07-26T11:54:15Z
dc.date.issued2022
dc.departmentDÜ, Fen-Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractIn the study, core-shell-structured Al/(ZnO:rGO)/pSi/Al photo-diodes were successfully fabricated using a sol-gel spin-coating method by varying the concentration of reduced-graphene oxide (rGO) from 1 % to 9 % (wt). The ZnO:rGO composite solution was coated on a silicon (p-Si) wafer at 1000 rpm and 300 K. Both aluminum back-ohmic and front-rectifier contacts were performed on the p-Si wafer by physical-vapor-deposition (PVD). The morphological and chemical structure of the photo-diodes were determined by using field-emission scanning electron microscopy (FE-SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD). The current -voltage (I-V) analysis in dark and under ultraviolet (UV, 365 nm) wavelength was utilized in detail. Basic electrical parameters, including the ideality factor (n), barrier height (BH) and series-shunt resistances (Rs, Rsh), were calculated using a variety of methods and compared to each other. The Card-Rhoderick method was used to extract energy-dependent profiles of interface traps (Nss). The core-shell-structured (ZnO-7 % rGO) photo-diode exhibited the best photocatalytic performance both in dark and under various illumination intensities (50-250 mW/cm2). The ZnO:rGO interlayer at the metal-semiconductor (M/S) interface leads to improvement of the photo-diode in respect of low-ideality factor/Nss/leakage-current and high-rectification and BH.en_US
dc.description.sponsorshipSakarya University of Applied Sciences Scientific Research Projects; [069-2022]en_US
dc.description.sponsorshipAcknowledgements The study was funded by Sakarya University of Applied Sciences Scientific Research Projects (Project Number: 069-2022) .en_US
dc.identifier.doi10.1016/j.diamond.2022.109435
dc.identifier.issn0925-9635
dc.identifier.issn1879-0062
dc.identifier.scopus2-s2.0-85140137593en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1016/j.diamond.2022.109435
dc.identifier.urihttps://hdl.handle.net/20.500.12684/12777
dc.identifier.volume130en_US
dc.identifier.wosWOS:000880001100004en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorDemir, Ahmet
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofDiamond and Related Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz$2023V1Guncelleme$en_US
dc.subjectZno; Rgo Core-Shell Structure; Thin Film Coatings; Photoelectric Propertiesen_US
dc.subjectGraphene Oxide; Electrical Characteristics; Assisted Synthesis; Charge Separation; Interfacial Layer; Schottky Diode; Photoluminescence; Nanoparticles; Fabrication; Nanocompositeen_US
dc.titleThe effect of different rates of ultra-thin gossamer-like rGO coatings on photocatalytic performance in ZnO core-shell structures for optoelectronic applicationsen_US
dc.typeArticleen_US

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