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Article Dans Une Revue Nature Photonics Année : 2022

Electroluminescence from Nanocrystals above 2 µm

Junling Qu
Mateusz Weis
Eva Izquierdo
Audrey Chu
Charlie Gréboval
Yoann Prado
Mathieu G Silly
Davide Boschetto

Résumé

Visible nanocrystal-based light-emitting diodes (LEDs) are about to become commercially available. However, their infrared counterparts suffer from two key limitations. First, III–V semiconductor technologies are strong competitors. Second, their potential for operation beyond 1.7 µm remains unexplored. The range from 1.5 to 4 µm corresponds to a technological gap in which the efficiency of interband quantum-well-based devices vanishes and quantum cascade lasers are not efficient enough. Powerful infrared LEDs in this range are needed for applications such as active imaging, organic molecule sensing and airfield lighting. Here we report the design of a HgTe nanocrystal-based LED with luminescence between 2 and 2.3 µm. With an external quantum efficiency of 0.3% and radiance up to 3 W Sr−1 m−2, these HgTe LEDs already present a competitive performance for emission above 2 µm.
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Dates et versions

hal-03478275 , version 1 (13-12-2021)

Identifiants

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Junling Qu, Mateusz Weis, Eva Izquierdo, Simon Gwénaël Mizrahi, Audrey Chu, et al.. Electroluminescence from Nanocrystals above 2 µm. Nature Photonics, 2022, 16 (1), pp.38-44. ⟨10.1038/s41566-021-00902-y⟩. ⟨hal-03478275⟩
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