TAMARAT, Philippe; HOU, Lei; TREBBIA, Jean-Baptiste; SWARNKAR, Abhishek; BIADALA, Louis; LOUYER, Yann; BODNARCHUK, Maryna; KOVALENKO, Maksym; EVEN, Jacky; LOUNIS, Brahim

doi:10.1038/s41467-020-19740-7

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TAMARAT, Philippe
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

HOU, Lei
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

TREBBIA, Jean-Baptiste
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

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Ce document a été publié dans

Nature Communications. 2020-11-26, vol. 11, n° 1, p. 6001

Nature Publishing Group

Résumé en anglais

Cesium lead halide perovskites exhibit outstanding optical and electronic properties for a wide range of applications in optoelectronics and for light-emitting devices. Yet, the physics of the band-edge exciton, whose recombination is at the origin of the photoluminescence, is not elucidated. Here, we unveil the exciton fine structure of individual cesium lead iodide perovskite nanocrystals and demonstrate that it is governed by the electron-hole exchange interaction and nanocrystal shape anisotropy. The lowest-energy exciton state is a long-lived dark singlet state, which promotes the creation of biexcitons at low temperatures and thus correlated photon pairs. These bright quantum emitters in the near-infrared have a photon statistics that can readily be tuned from bunching to antibunching, using magnetic or thermal coupling between dark and bright exciton sublevels.< Réduire

DOI

http://dx.doi.org/10.1038/s41467-020-19740-7

Project ANR

University of Bordeaux Graduate Scholl in Light Sciences & Technologies

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Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798