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Core-shell carrier and exciton transfer in GaAs/GaNAs coaxial nanowires
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5751-6225
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering.
Ehime University, Japan.
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2016 (English)In: Journal of Vacuum Science & Technology B, ISSN 1071-1023, E-ISSN 1520-8567, Vol. 34, no 4, 04J104- p.Article in journal (Refereed) Published
Abstract [en]

Comprehensive studies of GaAs/GaNAs coaxial nanowires grown on Si substrates are carried out by temperature-dependent photoluminescence (PL) and PL excitation, to evaluate effects of the shell formation on carrier recombination. The PL emission from the GaAs core is found to transform into a series of sharp PL lines upon radial growth of the GaNAs shell, pointing toward the formation of localization potentials in the core. This hampers carrier transfer at low temperatures from the core in spite of its wider bandgap. Carrier injection from the core to the optically active shell is found to become thermally activated at Tamp;gt;60 K, which implies that the localization potentials are rather shallow. (C) 2016 American Vacuum Society.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 34, no 4, 04J104- p.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-131521DOI: 10.1116/1.4953184ISI: 000382207700068OAI: oai:DiVA.org:liu-131521DiVA: diva2:974378
Note

Funding Agencies|Swedish Energy Agency [P40119-1]; Swedish Research Council [2015-05532]

Available from: 2016-09-26 Created: 2016-09-23 Last updated: 2017-11-21

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Chen, ShulaJansson, MattiasFilippov, StanislavChen, WeiminBuyanova, Irina
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Functional Electronic MaterialsFaculty of Science & EngineeringDepartment of Physics, Chemistry and Biology
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