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Mechanism for low-temperature photoluminescence in GaNAs/GaAs structures grown by molecular-beam epitaxy
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0001-7155-7103
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0002-6405-9509
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .ORCID iD: 0000-0002-9840-7364
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
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1999 (English)In: Applied Physics Letters, ISSN 0003-6951, Vol. 75, no 4, 501- p.Article in journal (Refereed) Published
Abstract [en]

 The mechanism for low-temperature photoluminescence (PL) emissions in GaNAs epilayers and GaAs/GaNxAs1 - x quantum well (QW) structures grown by molecular-beam epitaxy is studied in detail, employing PL, PL excitation, and time-resolved PL spectroscopies. It is shown that even though quantum confinement causes a strong blueshift of the GaNAs PL emission, its major characteristic properties are identical in both QW structures and epilayers. Based on the analysis of the PL line shape, its dependence on the excitation power and measurement temperature, as well as transient data, the PL emission is concluded to be caused by a recombination of excitons trapped by potential fluctuations in GaNAs.

Place, publisher, year, edition, pages
1999. Vol. 75, no 4, 501- p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-45148DOI: 10.1063/1.124429Local ID: 79833OAI: oai:DiVA.org:liu-45148DiVA: diva2:266010
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-03-27

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Buyanova, IrinaChen, WeiminPozina, GaliaBergman, PederMonemar, Bo

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