Lancaster EPrints

Physics and technology of mid-infrared light emitting diodes. .

Krier, A. (2001) Physics and technology of mid-infrared light emitting diodes. . Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 359 (1780). pp. 599-618. ISSN 1364-503X

Full text not available from this repository.

Abstract

There is increasing interest in mid-infrared (mid-IR) light emitting diodes which operate in the 2-5 mum spectral region. Efficient LEDs operating at the characteristic absorption wavelengths of target gases, such as CH4, CO2 and CO, have great potential for-the next generation of optical gas sensors. The fundamental difficulties associated with realizing suitable mid-IR LEDs at different wavelengths, with high continuous wave (CW) output power at room temperature, relate principally to quantum efficiency and optical extraction of the light. Each of these will be briefly considered. Some of the different device designs and techniques used for the suppression of non-radiative Auger recombination and the reduction of Shockley-Read-Hall centres are discussed. Liquid phase epitaxy (LPE) continues to hold a strong position in mid-IR LED technology and many of the best LEDs currently available have been fabricated using this technique. In this respect, the LPE growth of associated InAs(Sb)-based epitaxial structures and their purification is briefly reported. An overview of the 'state of the art' is also given with respect to the application of mid-IR LEDs in practical gas sensors.

Item Type: Article
Journal or Publication Title: Philosophical Transactions A: Mathematical, Physical and Engineering Sciences
Uncontrolled Keywords: Mid-Infrared Leds Liquid Phase Epitaxy Auger Recombination Rare-Earth Gettering Quantum Efficiency
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 4465
Deposited By: Dr Susan E. Krier
Deposited On: 18 Mar 2008 09:47
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/4465

Actions (login required)

View Item