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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, Thin Film Physics. 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: Gallium Nitride Materials and Devices VI / [ed] Jen-Inn Chyi, Yasushi Nanishi, Hadis Morkoç, Joachim Piprek, Euijoon Yoon, SPIE - International Society for Optical Engineering, 2011, Vol. 7939, 793907- p.Conference paper, Published paper (Refereed)
Abstract [en]

Photoluminescence (PL) properties are reported for a set of m-plane GaN films with Mg doping varied from mid 1018cm-3 to well above 1019 cm-3. The samples were grown with MOCVD at reduced pressure on low defect density m-plane bulk GaN templates. The sharp line near bandgap bound exciton (BE) spectra observed below 50 K, as well as the broader donor-acceptor pair (DAP) PL bands at 2.9 eV to 3.3 eV give evidence of several Mg related acceptors, similar to the case of c-plane GaN. The dependence of the low temperature BE spectra on excitation intensity as well as the transient decay behavior 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 0.23 eV. Similar spectra from Mg-doped GaN nanowires (NWs) grown by MOCVD are also demonstrated and briefly discussed.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2011. Vol. 7939, 793907- p.
Series
Proceedings of SPIE - International Society for Optical Engineering, ISSN 0277-786X ; Vol. 7939
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-73568DOI: 10.1117/12.874687ISBN: 9780819484765 (print)OAI: oai:DiVA.org:liu-73568DiVA: diva2:474578
Conference
Gallium Nitride Materials and Devices VI, San Francisco, California, United States, 24–27 January 2011
Available from: 2012-01-09 Created: 2012-01-09 Last updated: 2015-09-22Bibliographically approved

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Monemar, BoPaskov, PlamenPozina, GaliaHemmingsson, CarlBergman, Peder

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