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Title: Design, simulations, and optimizations of mid-infrared multiple quantum well LEDs
Authors: Ding, Ying
Meriggi, Laura
Steer, Matthew
Fan, Weijun
Bulashevich, Kirill
Thayne, Iain
Macgregor, Calum
Ironside, Charlie
Sorel, Marc
Keywords: LEDs
DRNTU::Engineering::Electrical and electronic engineering
Multiple Quantum Well
Issue Date: 2016
Source: Ding, Y., Meriggi, L., Steer, M., Fan, W., Bulashevich, K., Thayne, I., ... Sorel, M. (2016). Design, Simulations, and Optimizations of Mid-infrared Multiple Quantum Well LEDs. Procedia Engineering, 140, 36-42. doi : 10.1016/j.proeng.2015.10.153
Series/Report no.: Procedia Engineering
Abstract: We use eight-band k·p energy band structure model to help design novel GaInSb/AlGaInSb mid-infrared multiple quantum well (MQW) structures with an emitting mid-infrared waveband of 4-5 μm. Simulation results suggest that the number of quantum wells has little influence on the spontaneous emission rate and gain because of no strong coupling between quantum wells and they just simply follow scaling laws. The SiLENSe software module from STR-soft is used to investigate injection efficiency of the designed MQW structures. Simulation results indicate that the MQW structures offer better carrier confinement i.e. higher carrier injection efficiency compared with traditional bulk active regions which are currently used for mid-infrared LEDs and sensors. Experimental investigations show that the MQW LEDs with a seven wells structure show an increase of a factor 2 in wall plug efficiency and output power compared with conventional bulk LEDs at the same wavelength.
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2015.10.153
Rights: © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license ( Selection and/or peer-review under responsibility of the scientific committee of Symposium 2015 ICMAT
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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