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Comparative Study of GaN Based Light Emitting Devices Grown on Sapphire and GaN Substrates

Published online by Cambridge University Press:  01 February 2011

Stephan Figge ,
Jens Dennemarck ,
Gabriela Alexe  and
Detlef Hommel
Stephan Figge
Affiliation:
University of Bremen, Institute of Solid State Physics, Semiconductor Epitaxy, 28359 Bremen, Germany
Jens Dennemarck
Affiliation:
University of Bremen, Institute of Solid State Physics, Semiconductor Epitaxy, 28359 Bremen, Germany
Gabriela Alexe
Affiliation:
University of Bremen, Institute of Solid State Physics, Semiconductor Epitaxy, 28359 Bremen, Germany
Detlef Hommel
Affiliation:
University of Bremen, Institute of Solid State Physics, Semiconductor Epitaxy, 28359 Bremen, Germany
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Abstract

The homoeptaxial growth of GaN based devices has advantages against the heteroepi-taxial realization on substrates such as sapphire or SiC, since heteroepitaxy implies a lot of problems like lattice mismatch, different thermal expansion coefficients, and needs an extensive optimization of the growth at the heterointerface. In this paper we will discuss GaN based light emitting devices grown by homoepitaxy in comparison to devices grown on sapphire. We will show the differences in device performance, device processing and the influence of the thermal resistivity on the devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 831: Symposium E – GaN, AlN, InN, and Their Alloys , 2004 , E11.36
Copyright
Copyright © Materials Research Society 2005

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References

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