Abstract
Mid-wave infrared LEDs based on 6.1Å III/V semiconductors have trailed well behind visible LEDs in their wallplug efficiency. One contributing inefficiency is the low internal quantum efficiency (IQE) of emission of such materials, which is attributable to dominating nonradiative Auger and Shockley-Read-Hall recombination. However, recent work within this group has identified a W-superlattice based on 6.1Å III/V semiconductors with a remarkably high IQE of 77% (8%) at 77K (300K). We present in this work two-color pump-probe, differential transmission measurements to measure the ABC recombination coefficients of this superlattice at both 77K and 300K to elucidate physical mechanisms.
Funder
Test Resource Management Center (TRMC), Test and Evaluation/Science & Technology (T&E/S&T) Program through U.S. Army Program Executive Office for Simulation, Training and Instrumentation
Subject
Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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