Title :
31% absolute external quantum efficiency 850-nm LEDs and their modulation behavior
Author :
Windisch, R. ; Heremans, P. ; Potemans, J. ; Knobloch, A. ; Dutta, B. ; Dohler, G.H. ; Borghs, G.
Author_Institution :
IMEC, Leuven, Belgium
Abstract :
In this paper, we present a non-resonant cavity (NRC) LED, which reaches a record high absolute external quantum efficiency of 31%, or 0.44 W/A. The corresponding maximum wall-plug efficiency is 14%. In addition, for the first time, we present results on the turn-on and turn-off times of NRC-LEDs. For a NRC-LED with 9% external quantum efficiency, we report a 10-to-90 percent turn-on time of 2.4 ns and turn-off time of 1 ns. Finally, we show that at constant current, the output power of our NRC-LEDs decreases by only 0.36%//spl deg/C. The combination of these assets makes NRC-LEDs ideal light sources for short-distance optical interconnects.
Keywords :
light emitting diodes; optical interconnections; optical modulation; 31 percent; 850 nm; MBE growth; absolute external quantum efficiency; light sources; maximum wall-plug efficiency; modulation behavior; nonresonant cavity LED; short-distance optical interconnects; turn-on times; turnoff times; Gallium arsenide; Light emitting diodes; Light scattering; Mirrors; Optical scattering; Optical surface waves; Resonance; Rough surfaces; Surface roughness; Surface texture;
Conference_Titel :
Electron Devices Meeting, 1998. IEDM '98. Technical Digest., International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-4774-9
DOI :
10.1109/IEDM.1998.746529
