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Integrating an electrically active colloidal quantum dot photodiode with a graphene phototransistor

Author

Listed:
  • Ivan Nikitskiy

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Stijn Goossens

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Dominik Kufer

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Tania Lasanta

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Gabriele Navickaite

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Frank H. L. Koppens

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA-Institució Catalana de Recerca i Estudis Avançats)

  • Gerasimos Konstantatos

    (ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA-Institució Catalana de Recerca i Estudis Avançats)

Abstract

The realization of low-cost photodetectors with high sensitivity, high quantum efficiency, high gain and fast photoresponse in the visible and short-wave infrared remains one of the challenges in optoelectronics. Two classes of photodetectors that have been developed are photodiodes and phototransistors, each of them with specific drawbacks. Here we merge both types into a hybrid photodetector device by integrating a colloidal quantum dot photodiode atop a graphene phototransistor. Our hybrid detector overcomes the limitations of a phototransistor in terms of speed, quantum efficiency and linear dynamic range. We report quantum efficiencies in excess of 70%, gain of 105 and linear dynamic range of 110 dB and 3 dB bandwidth of 1.5 kHz. This constitutes a demonstration of an optoelectronically active device integrated directly atop graphene and paves the way towards a generation of flexible highly performing hybrid two-dimensional (2D)/0D optoelectronics.

Suggested Citation

  • Ivan Nikitskiy & Stijn Goossens & Dominik Kufer & Tania Lasanta & Gabriele Navickaite & Frank H. L. Koppens & Gerasimos Konstantatos, 2016. "Integrating an electrically active colloidal quantum dot photodiode with a graphene phototransistor," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11954
    DOI: 10.1038/ncomms11954
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    Cited by:

    1. Hao Jiang & Jintao Fu & Jingxuan Wei & Shaojuan Li & Changbin Nie & Feiying Sun & Qing Yang Steve Wu & Mingxiu Liu & Zhaogang Dong & Xingzhan Wei & Weibo Gao & Cheng-Wei Qiu, 2024. "Synergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Mingxiu Liu & Jingxuan Wei & Liujian Qi & Junru An & Xingsi Liu & Yahui Li & Zhiming Shi & Dabing Li & Kostya S. Novoselov & Cheng-Wei Qiu & Shaojuan Li, 2024. "Photogating-assisted tunneling boosts the responsivity and speed of heterogeneous WSe2/Ta2NiSe5 photodetectors," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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