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Ultra-narrow room-temperature emission from single CsPbBr3 perovskite quantum dots

Author

Listed:
  • Gabriele Rainò

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology)

  • Nuri Yazdani

    (ETH Zurich)

  • Simon C. Boehme

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology
    Vrije Universiteit Amsterdam)

  • Manuel Kober-Czerny

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology)

  • Chenglian Zhu

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology)

  • Franziska Krieg

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology)

  • Marta D. Rossell

    (Empa–Swiss Federal Laboratories for Materials Science and Technology)

  • Rolf Erni

    (Empa–Swiss Federal Laboratories for Materials Science and Technology)

  • Vanessa Wood

    (ETH Zurich)

  • Ivan Infante

    (Vrije Universiteit Amsterdam
    Istituto Italiano di Tecnologia)

  • Maksym V. Kovalenko

    (ETH Zurich
    Empa−Swiss Federal Laboratories for Materials Science and Technology)

Abstract

Semiconductor quantum dots have long been considered artificial atoms, but despite the overarching analogies in the strong energy-level quantization and the single-photon emission capability, their emission spectrum is far broader than typical atomic emission lines. Here, by using ab-initio molecular dynamics for simulating exciton-surface-phonon interactions in structurally dynamic CsPbBr3 quantum dots, followed by single quantum dot optical spectroscopy, we demonstrate that emission line-broadening in these quantum dots is primarily governed by the coupling of excitons to low-energy surface phonons. Mild adjustments of the surface chemical composition allow for attaining much smaller emission linewidths of 35−65 meV (vs. initial values of 70–120 meV), which are on par with the best values known for structurally rigid, colloidal II-VI quantum dots (20−60 meV). Ultra-narrow emission at room-temperature is desired for conventional light-emitting devices and paramount for emerging quantum light sources.

Suggested Citation

  • Gabriele Rainò & Nuri Yazdani & Simon C. Boehme & Manuel Kober-Czerny & Chenglian Zhu & Franziska Krieg & Marta D. Rossell & Rolf Erni & Vanessa Wood & Ivan Infante & Maksym V. Kovalenko, 2022. "Ultra-narrow room-temperature emission from single CsPbBr3 perovskite quantum dots," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30016-0
    DOI: 10.1038/s41467-022-30016-0
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    References listed on IDEAS

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    1. Hayeon Baek & Sungsu Kang & Junyoung Heo & Soonmi Choi & Ran Kim & Kihyun Kim & Nari Ahn & Yeo-Geon Yoon & Taekjoon Lee & Jae Bok Chang & Kyung Sig Lee & Young-Gil Park & Jungwon Park, 2024. "Insights into structural defect formation in individual InP/ZnSe/ZnS quantum dots under UV oxidation," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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