Effect of Auger recombination and leakage on the droop in InGaN/GaN quantum well LEDs
Year: 2014
Type: article
Abstract: We investigate the effect of the epitaxial structure and the acceptor doping profile on the efficiency droop in InGaN/GaN LEDs by the physics based simulation of experimental internal quantum efficiency (IQE) characteristics. The device geometry is an integral part of our simulation approach. We demonstrate that even for single quantum well LEDs the droop depends critically on the acceptor doping profile. The Auger recombination was found to increase stronger than with the third power of the carrier density and has been found to dominate the droop in the roll over zone of the IQE. The fitted Auger coefficients are in the range of the values predicted by atomistic simulations.
Source: Optics Express
DOI: 10.1364/oe.22.0a1440
Authors: Friedhard Römer, Bernd Witzigmann
Institution: University of Kassel
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,833
OpenAlex ID: W2155503924