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Time-resolved spectroscopy of excitons bound at shallow neutral donors in HVPE GaN
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
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2006 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, Vol. 376, 482-485 p.Article in journal (Refereed) Published
Abstract [en]

Time-resolved photo luminescence (TRPL) data for temperatures 2-150 K are presented for two thick HVPE samples grown in two different laboratories. The samples both have residual O and Si shallow donor concentrations in the 10(16)cm(-3) range. The radiative decay time for neutral donor-bound excitons (DBEs) related to these donors is found to be about 300 ps. The decay of the DBEs at longer decay times is found to be related to feeding from the free exciton-polariton states. At elevated temperatures the decay of the DBE is very similar to the free exciton decay. (c) 2006 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2006. Vol. 376, 482-485 p.
Keyword [en]
GaN, HVPE, exciton, donor, acceptor
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-46028DOI: 10.1016/j.physb.2005.12.123OAI: oai:DiVA.org:liu-46028DiVA: diva2:266924
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2015-09-22

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Monemar, BoPaskov, PlamenBergman, PederPaskova, TanjaHemmingsson, Carl

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