Capture and Emission of Charge Carriers by Quantum Well

Capture and Emission of Charge Carriers by Quantum Well DOI 10.1007/s11182-018-1389-3 Russian Physics Journal, Vol. 61, No. 2, June, 2018 (Russian Original No. 2, February, 2018) CAPTURE AND EMISSION OF CHARGE CARRIERS BY QUANTUM WELL V. N. Davydov and O. A. Karankevich UDC 621.315.82.2 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 size- quantization 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. Keywords: quantum well, capture time, emission time of charge carriers. INTRODUCTION An important parameter of LED heterostructures (HS) with multiple quantum wells (MQW), which determines the efficiency of the electrical energy 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

DOI 10.1007/s11182-018-1389-3 Russian Physics Journal, Vol. 61, No. 2, June, 2018 (Russian Original No. 2, February, 2018) CAPTURE AND EMISSION OF CHARGE CARRIERS BY QUANTUM WELL V. N. Davydov and O. A. Karankevich UDC 621.315.82.2 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 size- quantization 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. Keywords: quantum well, capture time, emission time of charge carriers. INTRODUCTION An important parameter of LED heterostructures (HS) with multiple quantum wells (MQW), which determines the efficiency of the electrical energy

Journal

Russian Physics JournalSpringer Journals

Published: Jun 4, 2018

References

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