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Carrier Lifetime and Mobility Enhancement in Nearly Defect-Free Core-Shell Nanowires Measured Using Time-Resolved Terahertz Spectroscopy

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dc.contributor.authorParkinson, Patrick Wallaceen_AU
dc.contributor.authorJoyce, Hannah Jen_AU
dc.contributor.authorGao, Qiangen_AU
dc.contributor.authorZhang, Xinen_AU
dc.contributor.authorJagadish, Chennupatien_AU
dc.contributor.authorHerz, Lauraen_AU
dc.contributor.authorJohnston, Michael Ben_AU
dc.contributor.authorTan, Hark Hoeen_AU
dc.date.accessioned2015-12-10T22:30:25Z
dc.date.issued2009
dc.date.updated2016-02-24T10:56:06Z
dc.description.abstractWe have used transient terahertz photoconductivity measurements to assess the efficacy of two-temperature growth and core-shell encapsulation techniques on the electronic properties of GaAs nanowires. We demonstrate that two-temperature growth of the GaAs core leads to an almost doubling in charge-carrier mobility and a tripling of carrier lifetime. In addition, overcoating the GaAs core with a larger-bandgap material is shown to reduce the density of surface traps by 82%, thereby enhancing the charge conductivity.
dc.identifier.issn1530-6984
dc.identifier.urihttp://hdl.handle.net/1885/55084
dc.publisherAmerican Chemical Society
dc.sourceNano Letters
dc.subjectKeywords: Bandgap materials; Charge-carrier mobility; Core-shell; Core-shell nanowires; Defect-free; GaAs; Mobility enhancement; Surface trap; Tera Hertz; Terahertz spectroscopy; Time-resolved; Two-temperature; Carrier lifetime; Electric wire; Electronic properties
dc.titleCarrier Lifetime and Mobility Enhancement in Nearly Defect-Free Core-Shell Nanowires Measured Using Time-Resolved Terahertz Spectroscopy
dc.typeJournal article
local.bibliographicCitation.issue9
local.bibliographicCitation.lastpage3353
local.bibliographicCitation.startpage3349
local.contributor.affiliationParkinson, Patrick Wallace, University of Oxford
local.contributor.affiliationJoyce, Hannah J, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGao, Qiang, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTan, Hoe Hark, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationZhang, Xin, University of Queensland
local.contributor.affiliationJagadish, Chennupati, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHerz, Laura, University of Oxford
local.contributor.affiliationJohnston, Michael B, University of Oxford
local.contributor.authoruidJoyce, Hannah J, u4193607
local.contributor.authoruidGao, Qiang, u4006742
local.contributor.authoruidTan, Hoe Hark, u9302338
local.contributor.authoruidJagadish, Chennupati, u9212349
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor100711 - Nanophotonics
local.identifier.ariespublicationu4326120xPUB318
local.identifier.ariespublicationU3488905xPUB247
local.identifier.citationvolume9
local.identifier.doi10.1021/nl9016336
local.identifier.scopusID2-s2.0-70349943996
local.identifier.thomsonID000269654900045
local.type.statusPublished Version

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