Journal
ADVANCED OPTICAL MATERIALS
Volume 11, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202201834
Keywords
colloidal quantum dots; electroluminescence; Fabry-Perot cavity; light-emitting diodes; silicon nanoparticles
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This article reports the fabrication and testing of SiQD-LEDs with a Fabry-Perot cavity structure, which exhibit narrow spectral linewidth and high stability.
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-Perot cavity are reported which exhibit a narrow spectral linewidth as low as approximate to 23 nm. The presented devices also provide wavelength and visual stability from +4 to +8 V, as well as spectral tunability.
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