We demonstrate high-efficiency green and yellow-green single-quantum-well light-emitting diodes (LEDs) grown on semipolar (20̄21) GaN substrates by metal organic chemical vapor deposition. The output power and external quantum efficiency at a driving current of 20mA under a pulsed condition with a 10% duty cycle are 9.9mW and 20.4% for the green LED and 5.7mW and 12.6% for the yellow-green LED, respectively.The electroluminescence linewidth narrowing, which is related to the band-filling effect caused by potential fluctuations, is not observed.
|Original language||English (US)|
|Journal||Applied Physics Express|
|State||Published - Dec 2010|
ASJC Scopus subject areas
- Physics and Astronomy(all)