Capture and Emission of Charge Carriers by Quantum Well

Capture and Emission of Charge Carriers by Quantum Well The interaction of electrons from the conduction band of the barrier layer of a LED heterostructure with the quantum well size-quantization level described by the capture time and emission time of charge carriers is considered. Relaxation of an excess energy upon capture and emission of charge carriers occurs as a result of their collisions with phonons of the quantum well substance and the “barrier layer-quantum well” interface. Analytical expressions are obtained for the interaction times, taking into account the depth of the sizequantization level, involved in the interaction with electrons, and the width of the well. Numerical estimates show that in real conditions, the capture time is shorter than the emission time, and this difference increases with increasing depth of the level. At shallow depths, the capture and emission times are comparable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Physics Journal Springer Journals

Capture and Emission of Charge Carriers by Quantum Well

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Publisher
Springer US
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Physics; Physics, general; Optics, Lasers, Photonics, Optical Devices; Condensed Matter Physics; Nuclear Physics, Heavy Ions, Hadrons; Theoretical, Mathematical and Computational Physics
ISSN
1064-8887
eISSN
1573-9228
D.O.I.
10.1007/s11182-018-1389-3
Publisher site
See Article on Publisher Site

Abstract

The interaction of electrons from the conduction band of the barrier layer of a LED heterostructure with the quantum well size-quantization level described by the capture time and emission time of charge carriers is considered. Relaxation of an excess energy upon capture and emission of charge carriers occurs as a result of their collisions with phonons of the quantum well substance and the “barrier layer-quantum well” interface. Analytical expressions are obtained for the interaction times, taking into account the depth of the sizequantization level, involved in the interaction with electrons, and the width of the well. Numerical estimates show that in real conditions, the capture time is shorter than the emission time, and this difference increases with increasing depth of the level. At shallow depths, the capture and emission times are comparable.

Journal

Russian Physics JournalSpringer Journals

Published: Jun 4, 2018

References

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