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Microcavity enhancement vs Auger recombination in variable thickness type-II superlattices in resonant cavity mid-infrared light emitting diodes.
- Source :
-
Journal of Applied Physics . 5/14/2024, Vol. 135 Issue 18, p1-12. 12p. - Publication Year :
- 2024
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LIGHT emitting diodes
*ELECTRON-hole recombination
*SUPERLATTICES
*QUANTUM wells
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 135
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 177227206
- Full Text :
- https://doi.org/10.1063/5.0193624