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Article Dans Une Revue Nano Letters Année : 2020

Electroluminescence from HgTe Nanocrystals and its Use for Active Imaging

Junling Qu
Charlie Gréboval
Audrey Chu
Adrien Khalili
Mathieu G Silly
Simon Ferré
  • Fonction : Auteur

Résumé

Mercury telluride (HgTe) nanocrystals are among of the most versatile infrared (IR) materials with the absorption of first optical absorption which can be tuned from visible to the THz range. Therefore, they have been extensively considered as near IR emitters and as absorbers for low-cost IR detectors. However, the electroluminescence of HgTe remains poorly investigated in spite of its ability to go toward longer wavelengths compared to traditional lead sulfide (PbS). Here, we demonstrate a light emitting diode (LED) based on an indium tin oxide (ITO)/zinc oxide (ZnO)/ZnO-HgTe/PbS/gold stacked structure, where the emitting layer consists of a ZnO/HgTe bulk heterojunction which drives the charge balance in the system. This LED has low turn-on voltage, long lifetime, and high brightness. Finally, we conduct short wavelength infrared (SWIR) active imaging, where illumination is obtained from a HgTe NC-based LED, and demonstrate moisture detection.
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Dates et versions

hal-02899117 , version 1 (14-07-2020)

Identifiants

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Junling Qu, Prachi Rastogi, Charlie Gréboval, Delphine Lagarde, Audrey Chu, et al.. Electroluminescence from HgTe Nanocrystals and its Use for Active Imaging. Nano Letters, 2020, ⟨10.1021/acs.nanolett.0c02557⟩. ⟨hal-02899117⟩
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