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17 March 2023 Erasing the efficiency droop in cubic phase InGaAlN QW light-emitting diode
Jean-Pierre Leburton
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Proceedings Volume PC12430, Quantum Sensing and Nano Electronics and Photonics XIX; PC1243002 (2023) https://doi.org/10.1117/12.2647459
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
The inherent causes of the efficiency droop and low current density at the onset of the efficiency droop in green hexagonal-LEDs (h-LEDs) and cubic-phase InGaAlN LEDs (c-LEDs) are investigated with a new Open Boundary Quantum LED Simulator (OBQ-LEDsim). The coexistence of strong internal polarization and large carrier (i.e. electron and hole) effective mass induces strong Auger recombination that causes the large performance rollover in h-LEDs. On the opposite, in c-LEDs, the absence of internal polarization together with smaller carrier effective mass weakens Auger recombination, which quenches the droop by ~51%. These findings point at new ways to improve the performances of green LEDs.
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Jean-Pierre Leburton "Erasing the efficiency droop in cubic phase InGaAlN QW light-emitting diode", Proc. SPIE PC12430, Quantum Sensing and Nano Electronics and Photonics XIX, PC1243002 (17 March 2023); https://doi.org/10.1117/12.2647459
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KEYWORDS
Light emitting diodes
Quantum wells
Quantum efficiency
Polarization
Green light emitting diodes
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