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Upconverted electroluminescence via Auger scattering of interlayer excitons in van der Waals heterostructures

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  • J. Binder

    (Laboratoire National des Champs Magnetiques Intenses, CNRS-UGA-UPS-INSA-EMFL
    University of Warsaw)

  • J. Howarth

    (University of Manchester
    University of Manchester)

  • F. Withers

    (University of Exeter)

  • M. R. Molas

    (Laboratoire National des Champs Magnetiques Intenses, CNRS-UGA-UPS-INSA-EMFL
    University of Warsaw)

  • T. Taniguchi

    (National Institute for Materials Science)

  • K. Watanabe

    (National Institute for Materials Science)

  • C. Faugeras

    (Laboratoire National des Champs Magnetiques Intenses, CNRS-UGA-UPS-INSA-EMFL)

  • A. Wysmolek

    (University of Warsaw)

  • M. Danovich

    (University of Manchester
    University of Manchester)

  • V. I. Fal’ko

    (University of Manchester
    University of Manchester
    Henry Royce Institute for Advanced Materials)

  • A. K. Geim

    (University of Manchester
    University of Manchester)

  • K. S. Novoselov

    (University of Manchester
    University of Manchester)

  • M. Potemski

    (Laboratoire National des Champs Magnetiques Intenses, CNRS-UGA-UPS-INSA-EMFL
    University of Warsaw)

  • A. Kozikov

    (University of Manchester
    University of Manchester)

Abstract

The intriguing physics of carrier-carrier interactions, which likewise affect the operation of light emitting devices, stimulate the research on semiconductor structures at high densities of excited carriers, a limit reachable at large pumping rates or in systems with long-lived electron-hole pairs. By electrically injecting carriers into WSe2/MoS2 type-II heterostructures which are indirect in real and k-space, we establish a large population of typical optically silent interlayer excitons. Here, we reveal their emission spectra and show that the emission energy is tunable by an applied electric field. When the population is further increased by suppressing the radiative recombination rate with the introduction of an hBN spacer between WSe2 and MoS2, Auger-type and exciton-exciton annihilation processes become important. These processes are traced by the observation of an up-converted emission demonstrating that excitons gaining energy in non-radiative Auger processes can be recovered and recombine radiatively.

Suggested Citation

  • J. Binder & J. Howarth & F. Withers & M. R. Molas & T. Taniguchi & K. Watanabe & C. Faugeras & A. Wysmolek & M. Danovich & V. I. Fal’ko & A. K. Geim & K. S. Novoselov & M. Potemski & A. Kozikov, 2019. "Upconverted electroluminescence via Auger scattering of interlayer excitons in van der Waals heterostructures," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10323-9
    DOI: 10.1038/s41467-019-10323-9
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    Cited by:

    1. Hugo Henck & Diego Mauro & Daniil Domaretskiy & Marc Philippi & Shahriar Memaran & Wenkai Zheng & Zhengguang Lu & Dmitry Shcherbakov & Chun Ning Lau & Dmitry Smirnov & Luis Balicas & Kenji Watanabe & , 2022. "Light sources with bias tunable spectrum based on van der Waals interface transistors," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Yang Luo & Fan-Fang Kong & Xiao-Jun Tian & Yun-Jie Yu & Shi-Hao Jing & Chao Zhang & Gong Chen & Yang Zhang & Yao Zhang & Xiao-Guang Li & Zhen-Yu Zhang & Zhen-Chao Dong, 2024. "Anomalously bright single-molecule upconversion electroluminescence," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Shuo Dong & Samuel Beaulieu & Malte Selig & Philipp Rosenzweig & Dominik Christiansen & Tommaso Pincelli & Maciej Dendzik & Jonas D. Ziegler & Julian Maklar & R. Patrick Xian & Alexander Neef & Avaise, 2023. "Observation of ultrafast interfacial Meitner-Auger energy transfer in a Van der Waals heterostructure," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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