Anodic Formation of Nanoporous Indium Phosphide in KOH Electrolytes: Effects of Temperature and Concentration

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dc.contributor.authorQuill, Nathan
dc.contributor.authorBuckley, D. Noel
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorLynch, Robert P.
dc.contributor.funderIrish Research Councilen
dc.contributor.funderSeventh Framework Programmeen
dc.contributor.funderFP7 People: Marie-Curie Actionsen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.date.accessioned2019-01-22T12:52:43Z
dc.date.available2019-01-22T12:52:43Z
dc.date.issued2019-01-12
dc.date.updated2019-01-21T21:17:12Z
dc.description.abstractAnodization of n-InP electrodes was carried out over a range of temperatures and KOH concentrations. Scanning electron microscopy showed <111>A aligned pore growth with pore width decreasing as the temperature was increased. This variation is explained in terms of the relative rates of electrochemical reaction and hole diffusion and supports the three-step model proposed earlier. As temperature is increased, both the areal density and width of surface pits decrease resulting in a large increase in the current density through the pits. This explains an observed decrease in porous layer thickness: pits sustain mass transport at the necessary rate for a shorter time before precipitation of etch products blocks the pores. As the concentration of KOH is increased, both pore width and layer thickness decrease to minima at ∼9 mol dm−3 after which they again increase. This variation of pore width is also explained by the three-step model and the variation in layer thickness is explained by mass transport effects. Layer porosity follows a similar trend to pore width, further supporting the three-step model. A transition from porous layer formation to planar etching is observed below 2 mol dm−3 KOH, and this is also explained by the three-step model.en
dc.description.sponsorshipIrish Research Council (Government of Ireland funding); (Science Foundation Ireland (National Access Program (NAP) funding (37 and 70)); Higher Education Authority (under the framework of the INSPIRE programme, funded by the Irish Government’s Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007–2013)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationQuill, N., Buckley, D. N., O'Dwyer, C. and Lynch, R. P. (2019) 'Anodic Formation of Nanoporous Indium Phosphide in KOH Electrolytes: Effects of Temperature and Concentration', Journal of The Electrochemical Society, 166(5), pp. H3097-H3106. doi: 10.1149/2.0131905jesen
dc.identifier.doi10.1149/2.0131905jes
dc.identifier.endpageH3106en
dc.identifier.issn0013-4651
dc.identifier.issn1945-7111
dc.identifier.issued5en
dc.identifier.journaltitleJournal of the Electrochemical Societyen
dc.identifier.startpageH3097en
dc.identifier.urihttps://hdl.handle.net/10468/7341
dc.identifier.volume166en
dc.language.isoenen
dc.publisherElectrochemical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/229520/EU/IRCSET International Mobility Fellowships in Science Engineering and Technology: co-funded by Marie Curie Actions/INSPIREen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Stokes Professorship & Lectureship Programme/07/SK/B1232a/IE/Colm ODwyer/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/en
dc.relation.urihttp://jes.ecsdl.org/content/166/5/H3097
dc.rights© The Author(s) 2019. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectEtchingen
dc.subjectSemiconductors - III-Ven
dc.subjectThermodynamicsen
dc.subjectCompound semiconductorsen
dc.subjectIndium phosphide anodizationen
dc.subjectPore formationen
dc.subject~Chemistry - Journal Articles~en
dc.subject~Tyndall National Institute - Journal Articles~en
dc.titleAnodic Formation of Nanoporous Indium Phosphide in KOH Electrolytes: Effects of Temperature and Concentrationen
dc.typeArticle (peer-reviewed)en
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