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Carbon And Hydrogen Induced Yellow Luminescence In Gallium Nitride Grown By Halide Vapor Phase Epitaxy

Published online by Cambridge University Press:  10 February 2011

R. Zhang  and
T. F. Kuech
R. Zhang
Affiliation:
Department of Chemical Engineering, University of Wisconsin – Madison, Madison, WI 53706
T. F. Kuech
Affiliation:
Department of Chemical Engineering, University of Wisconsin – Madison, Madison, WI 53706
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Abstract

Yellow luminescence (YL) from GaN was systematically investigated through the intentional introduction of carbon, from propane, and excess H2 during growth by the halide vapor phase epitaxy technique. All GaN films were studied by photoluminescence, X-ray diffraction and Hall measurements. The unintentionally doped GaN showed undetectable or very weak YL signal, while both C-doping and H2 addition resulted in a significant enhancement of YL. The blue- and red-shift of the YL band of the C-doped and ‘H2-grown’ GaN with the increasing temperature indicated that different mechanisms existed in these two cases. The temperature dependence of the integrated intensity of the YL band of both groups implicated that shallow donors, not ‘shallow’ acceptors participated the YL transition and that there were more than one radiative recombination channel within the YL band.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 482 , 1997 , 709
Copyright
Copyright © Materials Research Society 1998

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