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A vertical silicon-graphene-germanium transistor

Author

Listed:
  • Chi Liu

    (Institute of Metal Research, Chinese Academy of Sciences)

  • Wei Ma

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Maolin Chen

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Wencai Ren

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

  • Dongming Sun

    (Institute of Metal Research, Chinese Academy of Sciences
    University of Science and Technology of China)

Abstract

Graphene-base transistors have been proposed for high-frequency applications because of the negligible base transit time induced by the atomic thickness of graphene. However, generally used tunnel emitters suffer from high emitter potential-barrier-height which limits the transistor performance towards terahertz operation. To overcome this issue, a graphene-base heterojunction transistor has been proposed theoretically where the graphene base is sandwiched by silicon layers. Here we demonstrate a vertical silicon-graphene-germanium transistor where a Schottky emitter constructed by single-crystal silicon and single-layer graphene is achieved. Such Schottky emitter shows a current of 692 A cm−2 and a capacitance of 41 nF cm−2, and thus the alpha cut-off frequency of the transistor is expected to increase from about 1 MHz by using the previous tunnel emitters to above 1 GHz by using the current Schottky emitter. With further engineering, the semiconductor-graphene-semiconductor transistor is expected to be one of the most promising devices for ultra-high frequency operation.

Suggested Citation

  • Chi Liu & Wei Ma & Maolin Chen & Wencai Ren & Dongming Sun, 2019. "A vertical silicon-graphene-germanium transistor," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12814-1
    DOI: 10.1038/s41467-019-12814-1
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    Cited by:

    1. Bhardwaj, Chandan & Axsen, Jonn & McCollum, David, 2022. "Which “second-best” climate policies are best? Simulating cost-effective policy mixes for passenger vehicles," Resource and Energy Economics, Elsevier, vol. 70(C).
    2. Emblemsvåg, Jan, 2022. "Wind energy is not sustainable when balanced by fossil energy," Applied Energy, Elsevier, vol. 305(C).
    3. Cristancho Triana, Gerson Jaquin, 2023. "Actitud e intención hacia el consumo responsable en los hogares de Bogotá," Revista Tendencias, Universidad de Narino, vol. 24(1), pages 130-154, January.

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