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Photoluminescence of Mg-doped m-plane GaN grown by MOCVD on bulk GaN substrates
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-9840-7364
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2597-3322
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2011 (English)In: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, ISSN 1862-6300, Vol. 208, no 7, 1532-1534 p.Article in journal (Refereed) Published
Abstract [en]

Photoluminescence (PL) properties are reported for a set of m-plane GaN films with Mg doping varied from mid 10(18) cm(-3) to above 10(20) cm(-3). The samples were grown with MOCVD at reduced pressure on low defect density bulk GaN templates. The sharp line near bandgap bound exciton (BE) spectra observed below 50K, as well as the broader donor-acceptor pair (DAP) PL bands at 2.9-3.3eV give evidence of several Mg related acceptors, similar to the case of c-plane GaN. The dependece of the BE spectra on excitation intensity as well as the transient decay behaviour demonstrate acoustic phonon assisted transfer between the acceptor BE states. The lower energy donor-acceptor pair spectra suggest the presence of deep acceptors, in addition to the two main shallower ones at about 0.23eV Similar spectra from Mg-doped GaN nanowires (NWs) grown by MOCVD are also briefly disussed. (C) 2011 WILEY-VCH Verlag Gmbh andamp; Co. KGaA, Weinheim

Place, publisher, year, edition, pages
Wiley-VCH Verlag Berlin , 2011. Vol. 208, no 7, 1532-1534 p.
Keyword [en]
GaN, Mg-doping, MOCVD, m-plane, nanowire, photoluminescence
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-70279DOI: 10.1002/pssa.201001036ISI: 000293803600013OAI: oai:DiVA.org:liu-70279DiVA: diva2:437761
Note
Funding Agencies|K. A. Wallenberg Foundation||Swedish Energy Agency||Available from: 2011-08-30 Created: 2011-08-30 Last updated: 2015-09-22

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Monemar, BoPaskov, PlamenPozina, GaliaHemmingsson, CarlBergman, Peder
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