Microcavity enhancement vs Auger recombination in variable thickness type-II superlattices in resonant cavity mid-infrared light emitting diodes

K. N. Schrock; D. A. Montealegre; W. Dai; M. Z. Bellus; L. M. Nichols; J. P. Prineas

doi:10.1063/5.0193624

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Microcavity enhancement vs Auger recombination in variable thickness type-II superlattices in resonant cavity mid-infrared light emitting diodes

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Microcavity enhancement vs Auger recombination in variable thickness type-II superlattices in resonant cavity mid-infrared light emitting diodes

K. N. Schrock, D. A. Montealegre, W. Dai, M. Z. Bellus, L. M. Nichols and J. P. Prineas

Journal of applied physics, Vol.135(18), 183101

05/14/2024

DOI: 10.1063/5.0193624

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Abstract

In this study, we investigate the tradespace between the improvement of mid-infrared light-emitting diode efficiency through microcavity enhancement vs reduction of Auger recombination for different W-superlattice thicknesses. Several sample designs are modeled and then grown and fabricated to test the tradespace at different W-superlattice thicknesses down to the quantum well limit. In a half-cavity, with a single reflector from the top metal contact, intermediate thickness W-superlattices gave the highest efficiencies, outperforming those in the W-quantum well limit across the entire measured current range. Experimentally, we report wallplug efficiencies of 0.4% for a room temperature 3.2 μm device. W-superlattices of intermediate thickness were also found to be optimal for a full-cavity device with a bottom distributed Bragg reflector added. The resonant full cavity did strongly improve the peak spectral radiance, with a measured increase of four to five times for a 3.6 μm device, and a value that is >250 times larger than previously reported.

Details

Title: Subtitle: Microcavity enhancement vs Auger recombination in variable thickness type-II superlattices in resonant cavity mid-infrared light emitting diodes
Creators: K. N. Schrock - University of Iowa
D. A. Montealegre - University of Iowa
W. Dai - University of Iowa
M. Z. Bellus
L. M. Nichols
J. P. Prineas - University of Iowa
Resource Type: Journal article
Publication Details: Journal of applied physics, Vol.135(18), 183101
Publisher: AIP Publishing
DOI: 10.1063/5.0193624
ISSN: 0021-8979
eISSN: 1089-7550
Number of pages: 12
Grant note: FA2487-18-C-0029 / United States Air Force
Language: English
Date published: 05/14/2024
Academic Unit: Physics and Astronomy
Record Identifier: 9984627152902771

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