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A simple and efficient visible light photodetector based on Co3O4/ZnO composite
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Institute of Chemistry, University of Sindh, Jamshoro, 76080, Sindh, Pakistan.ORCID iD: 0000-0001-6777-5642
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. CNR-IMM, Via Piero Gobetti 101, Bologna, 40129, Italy.ORCID iD: 0000-0003-4598-9556
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-7949-0935
Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
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2021 (English)In: Optical and quantum electronics, ISSN 0306-8919, E-ISSN 1572-817X, Vol. 53, no 9, article id 534Article in journal (Refereed) Published
Abstract [en]

Herein, we propose for the first time visible light photodetector based on n-type ZnO nanorods decorated with p-type Co3O4 nanowires. The heterojunction was fabricated on fluorine doped tin oxide (FTO) glass substrate by low temperature aqueous chemical growth method. ZnO exhibits nanorod morphology and cobalt oxide possesses nanowire shape with sharp tail. Energy dispersive spectroscopy confirmed the presence of Zn, O, and Co elements in the heterojunction. ZnO and Co3O4 have hexagonal and cubic phases, respectively, as confirmed by XRD. The dense and perpendicular ZnO nanorods are acting as a scattering layer for visible light, while Co3O4 nanowires act as a visible-light absorber. The all oxide p–n junction can operate as visible light photodetector. Furthermore, the heterojunction also shows a reproducible and fast response for the detection of visible light. Optimization of the device is needed (presence of buffer layers, tuning a thickness of the optical absorber) to improve its functionalities. 

Place, publisher, year, edition, pages
Springer Nature, 2021. Vol. 53, no 9, article id 534
Keywords [en]
ZnO nanorods, Co3O4 nanosheets, Heterojunction, Visible light photodetector
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-86982DOI: 10.1007/s11082-021-03129-xISI: 000690987400001Scopus ID: 2-s2.0-85113418254OAI: oai:DiVA.org:ltu-86982DiVA, id: diva2:1591161
Note

Validerad;2021;Nivå 2;2021-09-07 (alebob);

Forskningsfinansiär: King Saud University (RSP-2021/79)

Available from: 2021-09-06 Created: 2021-09-06 Last updated: 2021-09-07Bibliographically approved

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Tahira, AneelaMazzaro, RaffaelloRigoni, FedericaIbupoto, Zafar Hussian

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