Evidence of localization effects in InGaN single-quantum-well ultraviolet light-emitting diodes

S. F. Chichibu; K. Wada; J. Müllhäuser; O. Brandt; K. H. Ploog; T. Mizutani; A. Setoguchi; R. Nakai; M. Sugiyama; H. Nakanishi; K. Korii; T. Deguchi; T. Sota; S. Nakamura

doi:10.1063/1.126131

Evidence of localization effects in InGaN single-quantum-well ultraviolet light-emitting diodes

S. F. Chichibu, K. Wada, J. Müllhäuser, O. Brandt, K. H. Ploog, T. Mizutani, A. Setoguchi, R. Nakai, M. Sugiyama, H. Nakanishi, K. Korii, T. Deguchi, T. Sota, S. Nakamura

IMRAM - Division of Measurements

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Abstract

The importance of doping or alloying with In for obtaining high external quantum efficiency was shown for GaN-based single-quantum-well (SQW) structures in terms of localization effects due to quantum-disk (Q-disk [M. Sugawara, Phys. Rev. B 51, 10743 (1995)])-size potential minima in the QW plane. The ultraviolet light-emitting diode with lightly In-alloyed InGaN SQW exhibited an electroluminescence peak from the band-tail states. Monochromatic cathodoluminescence mapping images of In_0.03Ga_0.97N SQW indicated the presence of Q-disk-size effective bandgap variation. Furthermore, cubic InGaN QW which does not suffer from the piezoelectric field normal to the QW plane, also exhibited a broad band-tail.

Original language	English
Pages (from-to)	1671-1673
Number of pages	3
Journal	Applied Physics Letters
Volume	76
Issue number	13
DOIs	https://doi.org/10.1063/1.126131
Publication status	Published - 2000 Mar 27

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Chichibu, S. F., Wada, K., Müllhäuser, J., Brandt, O., Ploog, K. H., Mizutani, T., Setoguchi, A., Nakai, R., Sugiyama, M., Nakanishi, H., Korii, K., Deguchi, T., Sota, T., & Nakamura, S. (2000). Evidence of localization effects in InGaN single-quantum-well ultraviolet light-emitting diodes. Applied Physics Letters, 76(13), 1671-1673. https://doi.org/10.1063/1.126131

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title = "Evidence of localization effects in InGaN single-quantum-well ultraviolet light-emitting diodes",

abstract = "The importance of doping or alloying with In for obtaining high external quantum efficiency was shown for GaN-based single-quantum-well (SQW) structures in terms of localization effects due to quantum-disk (Q-disk [M. Sugawara, Phys. Rev. B 51, 10743 (1995)])-size potential minima in the QW plane. The ultraviolet light-emitting diode with lightly In-alloyed InGaN SQW exhibited an electroluminescence peak from the band-tail states. Monochromatic cathodoluminescence mapping images of In0.03Ga0.97N SQW indicated the presence of Q-disk-size effective bandgap variation. Furthermore, cubic InGaN QW which does not suffer from the piezoelectric field normal to the QW plane, also exhibited a broad band-tail.",

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AU - Chichibu, S. F.

AU - Wada, K.

AU - Müllhäuser, J.

AU - Brandt, O.

AU - Ploog, K. H.

AU - Mizutani, T.

AU - Setoguchi, A.

AU - Nakai, R.

AU - Sugiyama, M.

AU - Nakanishi, H.

AU - Korii, K.

AU - Deguchi, T.

AU - Sota, T.

AU - Nakamura, S.

PY - 2000/3/27

Y1 - 2000/3/27

N2 - The importance of doping or alloying with In for obtaining high external quantum efficiency was shown for GaN-based single-quantum-well (SQW) structures in terms of localization effects due to quantum-disk (Q-disk [M. Sugawara, Phys. Rev. B 51, 10743 (1995)])-size potential minima in the QW plane. The ultraviolet light-emitting diode with lightly In-alloyed InGaN SQW exhibited an electroluminescence peak from the band-tail states. Monochromatic cathodoluminescence mapping images of In0.03Ga0.97N SQW indicated the presence of Q-disk-size effective bandgap variation. Furthermore, cubic InGaN QW which does not suffer from the piezoelectric field normal to the QW plane, also exhibited a broad band-tail.

AB - The importance of doping or alloying with In for obtaining high external quantum efficiency was shown for GaN-based single-quantum-well (SQW) structures in terms of localization effects due to quantum-disk (Q-disk [M. Sugawara, Phys. Rev. B 51, 10743 (1995)])-size potential minima in the QW plane. The ultraviolet light-emitting diode with lightly In-alloyed InGaN SQW exhibited an electroluminescence peak from the band-tail states. Monochromatic cathodoluminescence mapping images of In0.03Ga0.97N SQW indicated the presence of Q-disk-size effective bandgap variation. Furthermore, cubic InGaN QW which does not suffer from the piezoelectric field normal to the QW plane, also exhibited a broad band-tail.

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Evidence of localization effects in InGaN single-quantum-well ultraviolet light-emitting diodes

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