Anodic formation and characterization of nanoporous InP in aqueous KOH electrolytes

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dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorBuckley, D. Noel
dc.contributor.authorSutton, David
dc.contributor.authorNewcomb, Simon B.
dc.contributor.funderEnterprise Irelanden
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderUniversity of Limericken
dc.date.accessioned2016-07-07T11:44:09Z
dc.date.available2016-07-07T11:44:09Z
dc.date.issued2006-10-11
dc.date.updated2012-11-29T18:16:08Z
dc.description.abstractThe anodic behavior of highly doped (> 1018 cm-3) n-InP in aqueous KOH was investigated. Electrodes anodized in the absence of light in 2- 5 mol dm-3 KOH at a constant potential of 0.5- 0.75 V (SCE), or subjected to linear potential sweeps to potentials in this range, were shown to exhibit the formation of a nanoporous subsurface region. Both linear sweep voltammograms and current-time curves at constant potential showed a characteristic anodic peak, corresponding to formation of the nanoporous region. No porous region was formed during anodization in 1 mol dm-3 KOH. The nanoporous region was examined using transmission electron microscopy and found to have a thickness of some 1- 3 μm depending on the anodization conditions and to be located beneath a thin (typically ∼40 nm), dense, near-surface layer. The pores varied in width from 25 to 75 nm and both the pore width and porous region thickness were found to decrease with increasing KOH concentration. The porosity was approximately 35%. The porous layer structure is shown to form by the localized penetration of surface pits into the InP, and the dense, near-surface layer is consistent with the effect of electron depletion at the surface of the semiconductor.en
dc.description.sponsorshipHigher Education Authority (HEA Programme for Research in Third Level Institutions PRTLI); University of Limerick (Materials and Surface Science Institute (MSSI))en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'Dwyer, C., Buckley, D. N., Sutton, D. and Newcomb, S. B. (2006) 'Anodic formation and characterization of nanoporous InP in aqueous KOH electrolytes', Journal of The Electrochemical Society, 153(12), pp. G1039-G1046. http://jes.ecsdl.org/content/153/12/G1039.abstracten
dc.identifier.doi10.1149/1.2354441
dc.identifier.endpageG1046en
dc.identifier.issn0013-4651
dc.identifier.issued12en
dc.identifier.journaltitleJournal of The Electrochemical Societyen
dc.identifier.startpageG1039en
dc.identifier.urihttps://hdl.handle.net/10468/2835
dc.identifier.volume153en
dc.language.isoenen
dc.publisherElectrochemical Societyen
dc.rights© 2006 The Electrochemical Society. All rights reserved.en
dc.subjectIndium compoundsen
dc.subjectIII-V semiconductorsen
dc.subjectNanoporous materialsen
dc.subjectNanotechnologyen
dc.subjectAnodisationen
dc.subjectElectrolytesen
dc.subjectVoltammetry (chemical analysis)en
dc.subjectTransmission electron microscopyen
dc.subjectPorosityen
dc.subjectSemiconductor growthen
dc.titleAnodic formation and characterization of nanoporous InP in aqueous KOH electrolytesen
dc.typeArticle (peer-reviewed)en
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