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Electrical determination of current injection and internal quantum efficiencies in AlGaN-based deep-ultraviolet light-emitting diodes
- Source :
- Optics Express. 25:A639
- Publication Year :
- 2017
- Publisher :
- The Optical Society, 2017.
-
Abstract
- We propose a method to determine the current injection efficiency (CIE) and internal quantum efficiency (IQE) of light-emitting diodes (LEDs) during current injection. The method is based on fourth-order polynomial fitting of a modified rate equation to electroluminescence data. Our method can extract the CIE at low injection current densities, unlike conventional methods that generally assume the CIE to be unity. We apply the method to AlGaN-based deep-ultraviolet LEDs. Results show that the CIE was only approximately 51% at low injection current densities and was almost independent of injection current density up to 100 A/cm2. The peak IQE was 77%.
- Subjects :
- 010302 applied physics
Materials science
business.industry
02 engineering and technology
Chemical vapor deposition
Rate equation
Electroluminescence
021001 nanoscience & nanotechnology
01 natural sciences
Atomic and Molecular Physics, and Optics
law.invention
Optics
law
0103 physical sciences
Optoelectronics
Quantum efficiency
Current (fluid)
0210 nano-technology
business
Current density
Light-emitting diode
Diode
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....da67ff0725fed0c69b1c5d65c68635f2