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A spectrally tunable all-graphene-based flexible field-effect light-emitting device

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  • Xiaomu Wang

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University
    Present address: Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.)

  • He Tian

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

  • Mohammad Ali Mohammad

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

  • Cheng Li

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

  • Can Wu

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

  • Yi Yang

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

  • Tian-Ling Ren

    (Institute of Microelectronics, Tsinghua University
    Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University)

Abstract

The continuous tuning of the emission spectrum of a single light-emitting diode (LED) by an external electrical bias is of great technological significance as a crucial property in high-quality displays, yet this capability has not been demonstrated in existing LEDs. Graphene, a tunable optical platform, is a promising medium to achieve this goal. Here we demonstrate a bright spectrally tunable electroluminescence from blue (∼450 nm) to red (∼750 nm) at the graphene oxide/reduced-graphene oxide interface. We explain the electroluminescence results from the recombination of Poole–Frenkel emission ionized electrons at the localized energy levels arising from semi-reduced graphene oxide, and holes from the top of the π band. Tuning of the emission wavelength is achieved by gate modulation of the participating localized energy levels. Our demonstration of current-driven tunable LEDs not only represents a method for emission wavelength tuning but also may find applications in high-quality displays.

Suggested Citation

  • Xiaomu Wang & He Tian & Mohammad Ali Mohammad & Cheng Li & Can Wu & Yi Yang & Tian-Ling Ren, 2015. "A spectrally tunable all-graphene-based flexible field-effect light-emitting device," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8767
    DOI: 10.1038/ncomms8767
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    Cited by:

    1. Samira Ranaei & Arho Suominen & Alan Porter & Stephen Carley, 2020. "Evaluating technological emergence using text analytics: two case technologies and three approaches," Scientometrics, Springer;Akadémiai Kiadó, vol. 122(1), pages 215-247, January.

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