Colloidal Silicon Quantum Dot-Based Cavity Light-Emitting Diodes with Narrowed and Tunable Electroluminescence

I. Teng Cheong, Josef Mock, Maria Kallergi, Elisabeth Groß, Alkiviathes Meldrum, Bernhard Rieger, Markus Becherer, Jonathan G.C. Veinot

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Luminescent colloidal silicon quantum dots (SiQDs) are explored as alternatives to metal-based quantum dots for light-emitting diodes (LEDs) because of the abundance and biocompatibility of silicon. To date, the broad electroluminescence (EL) bandwidth (>100 nm) and blueshifting of EL at high applied voltages of SiQD-LEDs are outstanding challenges that limit a competitive spectral purity and device stability. Herein, the fabrication and testing of SiQD-LEDs that incorporate a Fabry–Pérot cavity are reported which exhibit a narrow spectral linewidth as low as ≈23 nm. The presented devices also provide wavelength and visual stability from +4 to +8 V, as well as spectral tunability.

Original languageEnglish
Article number2201834
JournalAdvanced Optical Materials
Volume11
Issue number1
DOIs
StatePublished - 4 Jan 2023

Keywords

  • Fabry–Pérot cavity
  • colloidal quantum dots
  • electroluminescence
  • light-emitting diodes
  • silicon nanoparticles

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