Graphene-ZnO NWs hybrid film for large-area UV photodetector

Fengyuan Liu, Nivasan Yogeswaran, Carlos García Núñez, Duncan Gregory, Ravinder Dahiya

    Research output: Contribution to conferencePosterpeer-review

    1 Citation (Scopus)

    Abstract

    One of the major barriers in the way of developing high-performance graphene-based photodetector is the low and wavelength-independent light absorption by graphene. In this regard, the schemes that adopt a heterogeneous integration of graphene and light sensitive materials are considered to hold the promise. However, to realize large-area heterogenous integration itself is not easy as some of the micro/nanofabrication steps are known to degrade the quality of graphene. This work demonstrates the successful integration of graphene-ZnO nanowires (NWs) over 4 cm2 with a facile and cost-effective method. The as-fabricated graphene-ZnO hybrid film can function as an ultraviolet (UV) photodetector (PD) with a high performance and good uniformity over large-area. The huge sensitivity of ZnO NWs to UV light, combined with the high carrier mobility of graphene, enable the UV PD with a photoresponse up to 2100 A/W, and fast response times down to millisecond.
    Original languageEnglish
    Number of pages4
    DOIs
    Publication statusPublished - 27 Dec 2018
    EventIEEE Sensors Conference 2018 - Pullman New Delhi Aerocity, New Delhi, India
    Duration: 28 Oct 201831 Oct 2018
    http://ieee-sensors2018.org/

    Conference

    ConferenceIEEE Sensors Conference 2018
    Abbreviated titleIEEE Sensors 2018
    Country/TerritoryIndia
    CityNew Delhi
    Period28/10/1831/10/18
    Internet address

    Keywords

    • graphene
    • ZnO NW
    • photodetector
    • heterogeneous integration
    • large-area electronics

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