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High Power 330 nm AlInGaN UV LEDs in the High Injection Regime

Published online by Cambridge University Press:  01 February 2011

M. Gherasimova ,
J. Su ,
G. Cui ,
J. Han ,
H. Peng ,
E. Makarona ,
Y. He ,
Y.-K. Song  and
A. V. Nurmikko
M. Gherasimova
Affiliation:
Department of Electrical Engineering, Yale University, P.O. Box 208284, New Haven, CT 06520
J. Su
Affiliation:
Department of Electrical Engineering, Yale University, P.O. Box 208284, New Haven, CT 06520
G. Cui
Affiliation:
Department of Electrical Engineering, Yale University, P.O. Box 208284, New Haven, CT 06520
J. Han
Affiliation:
Department of Electrical Engineering, Yale University, P.O. Box 208284, New Haven, CT 06520
H. Peng
Affiliation:
Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912
E. Makarona
Affiliation:
Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912
Y. He
Affiliation:
Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912
Y.-K. Song
Affiliation:
Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912
A. V. Nurmikko
Affiliation:
Division of Engineering, Brown University, 182 Hope Street, Providence, RI 02912
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Abstract

We report on the growth and testing of the light emitting diode structures incorporating quaternary AlInGaN active region with an emission wavelength of 330 nm. Small area circular devices were fabricated, yielding the output power of 110 μW measured with a bare-chip configuration in a high current injection regime (8 kA/cm2 for a 20 μm diameter device). Structural properties of the constituent epitaxial layers were evaluated by atomic force microscopy and transmission electron microscopy, resulting in the observation of two-dimensional growth morphologies of AlN and AlGaN, and the estimate of threading dislocation densities in the low 109 cm-2 range in the structures grown on sapphire substrates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 798: Symposium Y – GaN and Related Alloys , 2003 , Y1.8
Copyright
Copyright © Materials Research Society 2004

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References

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