Electroluminescence from nanocrystals above 2 µm

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 unexplo...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Nature photonics 2022, Vol.16 (1), p.38-44
Hauptverfasser: Qu, Junling, Weis, Mateusz, Izquierdo, Eva, Mizrahi, Simon Gwénaël, Chu, Audrey, Dabard, Corentin, Gréboval, Charlie, Bossavit, Erwan, Prado, Yoann, Péronne, Emmanuel, Ithurria, Sandrine, Patriarche, Gilles, Silly, Mathieu G., Vincent, Grégory, Boschetto, Davide, Lhuillier, Emmanuel
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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. Near-infrared emission at around 2 µm is observed from HgTe nanocrystals. LEDs based on this material platform could prove to be a useful low-cost, convenient light source for applications in gas sensing and other tasks.
ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-021-00902-y