Journal article
Ultra-narrow room-temperature emission from single CsPbBr3 perovskite quantum dots
- Abstract:
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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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.3MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-022-30016-0
Authors
- Funder identifier:
- https://ror.org/00yjd3n13
- Publisher:
- Springer Nature
- Journal:
- Nature Communications More from this journal
- Volume:
- 13
- Issue:
- 1
- Article number:
- 2587
- Publication date:
- 2022-05-11
- Acceptance date:
- 2022-03-25
- DOI:
- EISSN:
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2041-1723
- Pmid:
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35546149
- Language:
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English
- Keywords:
- Pubs id:
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1276593
- Local pid:
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pubs:1276593
- Deposit date:
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2025-01-22
- ARK identifier:
Terms of use
- Copyright holder:
- Rainò et al.
- Copyright date:
- 2022
- Rights statement:
- Copyright © 2022, The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Licence:
- CC Attribution (CC BY)
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