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Is Auger recombination responsible for the efficiency rollover in III-nitride light-emitting diodes?
K.A. Bulashevich, S.Yu. Karpov
phys. stat. solidi (c) 5, No. 6, 2066–2069 (2008) (05) |
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| Practically all III-nitride light emitting diodes (LEDs) suffer from the efficiency rollover that occurs at
high electric currents in the devices and limits their performance. At the moment, the mechanisms responsible
for the rollover are not yet confidently identified despite the crucial importance of this problem for
the LED production. On the basis of simulation, we suggest that the Auger recombination is a likely mechanism,
producing the efficiency reduction at high currents. Using an empirically estimated Auger recombination
coefficient, we argue for significance of this mechanism under practical operation conditions. |
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