Design, simulations, and optimizations of mid-infrared multiple quantum well LEDs

Ding, Y., Meriggi, L. , Steer, M., Fan, W., Bulashevich, K., Thayne, I. , Macgregor, C., Ironside, C. and Sorel, M. (2016) Design, simulations, and optimizations of mid-infrared multiple quantum well LEDs. Procedia Engineering, 140, pp. 36-42. (doi:10.1016/j.proeng.2015.10.153)

Ding, Y., Meriggi, L. , Steer, M., Fan, W., Bulashevich, K., Thayne, I. , Macgregor, C., Ironside, C. and Sorel, M. (2016) Design, simulations, and optimizations of mid-infrared multiple quantum well LEDs. Procedia Engineering, 140, pp. 36-42. (doi:10.1016/j.proeng.2015.10.153)

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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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Thayne, Professor Iain and Sorel, Professor Marc and Meriggi, Miss Laura and Steer, Dr Matthew and Ding, Dr Ying
Authors: Ding, Y., Meriggi, L., Steer, M., Fan, W., Bulashevich, K., Thayne, I., Macgregor, C., Ironside, C., and Sorel, M.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Procedia Engineering
Publisher:Elsevier
ISSN:1877-7058
Published Online:08 March 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Procedia Engineering 140: 36-42
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
605791Novel light sources and detectors for mid-IR gas sensors powered by energy harvestingCharles IronsideInnovate UK (INNOVATE)101259ENG - ENGINEERING ELECTRONICS & NANO ENG