Abstract
Conventional light-emitting diodes (LEDs) face an efficiency droop at low current due to non-radiative recombination overtaking radiative recombination at low carrier density. To overcome this universal problem, we develop LEDs with high efficiency at ultralow current and voltage, using a novel quantum well design and high-quality interfaces to suppress non-radiative recombination and enhance radiative recombination. The device exhibits close to unity internal quantum efficiency at a low current density of
Original language | English (US) |
---|---|
Pages (from-to) | 588-592 |
Number of pages | 5 |
Journal | Nature Photonics |
Volume | 13 |
Issue number | 9 |
DOIs | |
State | Published - Jan 2019 |