1.
Opt Express
; 24(3): 2971-80, 2016 Feb 08.
Artigo
em Inglês
| MEDLINE
| ID: mdl-26906864
RESUMO
Recent experimental investigations on the reduction of internal quantum efficiency with increasing current density in (AlInGa)N quantum well structures show that Auger recombination is a significant contributor to the so-called "droop" phenomenon. Using photoluminescence (PL) test structures, we find Auger processes are responsible for at least 15 % of the measured efficiency droop. Furthermore, we confirm that electron-electron-hole (nnp) is stronger than electron-hole-hole (npp) Auger recombination in standard LEDs. The ratio of respective Auger coefficients is determined to be in the range 1 < Cnnp/Cnpp ≤ 12. This asymmetry is shown to limit the detection efficiency of Auger processes in our PL-based approach.