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The Influence of Growth Temperature on Oxygen Concentration in GaN Buffer Layer

Published online by Cambridge University Press:  01 February 2011

Ewa Dumiszewska ,
Wlodek Strupinski ,
Piotr Caban ,
Marek Wesolowski ,
Dariusz Lenkiewicz ,
Rafal Jakiela ,
Karolina Pagowska ,
Andrzej Turos  and
Krzysztof Zdunek
Ewa Dumiszewska
Affiliation:
ewa.dumiszewska@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland, +48 835 30 41 ext. 136, 48 22 846 54 96
Wlodek Strupinski
Affiliation:
wlodzimierz.strupinski@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Piotr Caban
Affiliation:
piotr.caban@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Marek Wesolowski
Affiliation:
marek.wesolowski@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Dariusz Lenkiewicz
Affiliation:
dariusz.lenkiewicz@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Rafal Jakiela
Affiliation:
jakiela@ifpan.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Karolina Pagowska
Affiliation:
karolina.pagowska@gmail.com, Soltan Institute for Nuclear Studies, Swierk/Otwock, 05-400, Poland
Andrzej Turos
Affiliation:
andrzej.turos@itme.edu.pl, Institute of Electronic Materials Technology, III-V Epitaxy Department, Wolczynska 133, Warsaw, 01-919, Poland
Krzysztof Zdunek
Affiliation:
krzysztof.zdunek@inmat.pw.edu.pl, Warsaw University of Technology, Faculty of Materials Science, Woloska 141, Warsaw, 02-507, Poland
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Abstract

The influence of growth temperature on oxygen incorporation into GaN epitaxial layers was studied. GaN layers deposited at low temperatures were characterized by much higher oxygen concentration than those deposited at high temperature typically used for epitaxial growth. GaN buffer layers (HT GaN) about 1 μm thick were deposited on GaN nucleation layers (NL) with various thicknesses. The influence of NL thickness on crystalline quality and oxygen concentration of HT GaN layers were studied using RBS and SIMS. With increasing thickness of NL the crystalline quality of GaN buffer layers deteriorates and the oxygen concentration increases. It was observed that oxygen atoms incorporated at low temperature in NL diffuse into GaN buffer layer during high temperature growth as a consequence GaN NL is the source for unintentional oxygen doping.

Keywords

nitrideOepitaxy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1068: Symposium C – Advances in GaN, GaAs, SiC and Related Alloys on Silicon Substrates , 2008 , 1068-C03-09
Copyright
Copyright © Materials Research Society 2008

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References

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