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Article Dans Une Revue Advanced Optical Materials Année : 2021

Optimized Infrared LED and its use in an all-HgTe Nanocrystal-based active imaging setup

Junling Qu
Eva Izquierdo
Adrien Khalili
Charlie Gréboval
Audrey Chu
Yoann Prado
Mathieu Silly

Résumé

Nanocrystals have reached a high level of maturity, enabling their integration into optoelectronic devices. The next challenge is the combination of several types of devices into one complex system to achieve better on-chip integration. Here, we focus on an all-HgTe-nanocrystal active imaging setup operating in the shortwave infrared. We first focus on the design of an optimized infrared light emitting diode (LED). We show that a halide technology processing enables an increase of the electroluminescence signal by a factor of 3, while preserving a low turn-on voltage and a high brightness (3 W.sr-1 .m-2). We then unveil the degradation mechanism of this LED under continuous operation and show a shift from band edge to trap emission. This degradation process can be strongly reduced thanks to the encapsulation and the thermal control of the LED. Lastly, we image the infrared emission of the LED using a focal plane array whose active layer is also made of HgTe nanocrystals, paving the way for all-nanocrystal-based active imaging setups.
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Dates et versions

hal-03478269 , version 1 (13-12-2021)

Identifiants

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Erwan Bossavit, Junling Qu, Claire Abadie, Corentin Dabard, Tung Dang, et al.. Optimized Infrared LED and its use in an all-HgTe Nanocrystal-based active imaging setup. Advanced Optical Materials, 2021, pp.2101755. ⟨10.1002/adom.202101755⟩. ⟨hal-03478269⟩
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