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Strong room temperature 510 nm emission from cubic InGaN/GaN multiple quantum wells

Published online by Cambridge University Press:  01 February 2011

S.F. Li ,
D.J. As ,
K. Lischka ,
D.G. Pacheco-Salazar ,
L.M.R. Scolfaro ,
J.R. Leite ,
F. Cerdeira  and
E.A. Meneses
S.F. Li
Affiliation:
University of Paderborn, Department of Physics, Warburger Str. 100, D-33098 Paderborn, Germany
D.J. As
Affiliation:
University of Paderborn, Department of Physics, Warburger Str. 100, D-33098 Paderborn, Germany
K. Lischka
Affiliation:
University of Paderborn, Department of Physics, Warburger Str. 100, D-33098 Paderborn, Germany
D.G. Pacheco-Salazar
Affiliation:
Institute of Physics, University of Sao Paulo, P.O. Box 66318, Sao Paulo-SP, Brazil
L.M.R. Scolfaro
Affiliation:
Institute of Physics, University of Sao Paulo, P.O. Box 66318, Sao Paulo-SP, Brazil
J.R. Leite
Affiliation:
Institute of Physics, University of Sao Paulo, P.O. Box 66318, Sao Paulo-SP, Brazil
F. Cerdeira
Affiliation:
Institute of Physics Gleb Wataghin, University of Campinas, P.O. Box 6165, Campinas-SP, Brazil
E.A. Meneses
Affiliation:
Institute of Physics Gleb Wataghin, University of Campinas, P.O. Box 6165, Campinas-SP, Brazil
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Abstract

Cubic InGaN/GaN double heterostructures and multi-quantum-wells have been grown by Molecular Beam Epitaxy on cubic 3C-SiC. We find that the room temperature photoluminescence spectra of our samples has two emission peaks at 2.4 eV and 2.6 e V, respectively. The intensity of the 2.6 eV decreases and that of the 2.4 eV peak increases when the In mol ratio is varied between X = 0.04 and 0.16. However, for all samples the peak energy is far below the bandgap energy measured by photoluminescence excitation spectra, revealing a large Stokes-like shift of the InGaN emission. The temperature variation of the photoluminescence intensity yields an activation energy of 21 meV of the 2.6 eV emission and 67 meV of the 2.4 eV emission, respectively. The room temperature photoluminescence of fully strained multi quantum wells (x = 0.16) is a single line with a peak wavelength at about 510 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 831: Symposium E – GaN, AlN, InN, and Their Alloys , 2004 , E8.15
Copyright
Copyright © Materials Research Society 2005

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References

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