Radiance of small-area high-current-density electroluminescent diodes

1 January 1972

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE

Vol. 60 (2) , 231-232
https://doi.org/10.1109/proc.1972.8600

Abstract

Optical power radiated into a solid angle per unit area of emitting surface (radiance) is a basic measure of the usefulness of an electroluminescent device to be used as a communications-system source. Dc radiance values from about 20 to more than 100 W/sr/cm²have been obtained for various small-area GaAs and AlGaAs diodes operated at current densities that yielded an operating half-life of at least several thousand hours. These radiance values are two to three orders of magnitude larger than those obtained with relatively large-area commercial light-emitting diode (LED) indicator lamps.

Keywords

ELECTROLUMINESCENCE
LIGHT EMITTING DIODES
STIMULATED EMISSION
OPTICAL DEVICES
SOLIDS
AREA MEASUREMENT
POWER MEASUREMENT
ELECTROLUMINESCENT DEVICES
GALLIUM ARSENIDE
LED LAMPS