Graphene hot-electron light bulb: incandescence from hBN-encapsulated graphene in air

Seok-Kyun Son, Makars Šiškins, Ciaran Mullan, Jun Yin, Vasyl Kravets, Aleksey Kozikov, Servet Ozdemir, Matthew Holwill, Kenji Watanabe, Takashi Taniguchi, Davit Ghazaryan, Konstantin Novoselov, Vladimir Fal'ko, Artem Mishchenko

    Research output: Contribution to journalArticlepeer-review


    The excellent electronic and mechanical properties of graphene allow it to sustain very large currents, enabling its incandescence through Joule heating in suspended devices. Although interesting scientifically and promising technologically, this process is unstable in ambient environment, because graphene quickly oxidises at high temperatures. Here, we take the performance of graphene-based incandescent devices to the next level by encapsulating graphene with hexagonal boron nitride (hBN). Remarkably, we found that the hBN encapsulation provides an excellent protection for hot graphene filaments even at temperatures well above 2000 K. Unrivalled oxidation resistance of hBN combined with atomically clean graphene/hBN interface allows for a stable light emission from our devices in atmosphere for many hours of continuous operation. Furthermore, when confined in a simple photonic cavity, the thermal emission spectrum is modified by a cavity mode, shifting the emission to the visible range spectrum. We believe our results demonstrate that hBN/graphene heterostructures can be used to conveniently explore the technologically important high-temperature regime and to pave the way for future optoelectronic applications of graphene-based systems.
    Original languageEnglish
    Journal2 D Materials
    Early online date2 Nov 2017
    Publication statusPublished - 2017


    • Graphene
    • hBN-encapsulated graphene
    • incandescence
    • Light emitting materials
    • Hot graphene

    Research Beacons, Institutes and Platforms

    • National Graphene Institute


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