  We report on the direct measurement of hot electrons generated in the active
region of blue light-emitting diodes grown by ammonia molecular beam epitaxy by
electron emission spectroscopy. The external quantum efficiency of these
devices is <1% and does not droop; thus, the efficiency losses from the
intrinsic, interband, electron-electron-hole, or electron-hole-hole Auger
should not be a significant source of hot carriers. The detection of hot
electrons in this case suggests that an alternate hot electron generating
process is occurring within these devices, likely a trap-assisted Auger
recombination process.
