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  • 1.
    Tahira, Aneela
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Institute of Chemistry, University of Sindh, Jamshoro, 76080, Sindh, Pakistan.
    Mazzaro, Raffaello
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. CNR-IMM, Via Piero Gobetti 101, Bologna, 40129, Italy.
    Rigoni, Federica
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Nafady, Ayman
    Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
    Shaikh, Shoyebmohamad F.
    Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
    Alothman, Asma A.
    Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
    Alshgari, Razan A.
    Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
    Ibupoto, Zafar Hussian
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Institute of Chemistry, University of Sindh, Jamshoro, 76080, Sindh, Pakistan.
    A simple and efficient visible light photodetector based on Co3O4/ZnO composite2021In: Optical and quantum electronics, ISSN 0306-8919, E-ISSN 1572-817X, Vol. 53, no 9, article id 534Article in journal (Refereed)
    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. 

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