Quantum confined intense red luminescence from large area monolithic arrays of mesoporous and nanocrystal-decorated silicon nanowires for luminescent devices

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dc.contributor.author O'Dwyer, Colm
dc.contributor.author McSweeney, William
dc.contributor.author Collins, Gillian
dc.date.accessioned 2018-05-09T15:19:30Z
dc.date.available 2018-05-09T15:19:30Z
dc.date.issued 2015-09-01
dc.identifier.citation O'Dwyer, C., McSweeney, W. and Collins, G. (2016) 'Quantum Confined Intense Red Luminescence from Large Area Monolithic Arrays of Mesoporous and Nanocrystal-Decorated Silicon Nanowires for Luminescent Devices', ECS Journal of Solid State Science and Technology, 5(1), pp. R3059-R3066. doi: 10.1149/2.0081601jss en
dc.identifier.volume 5 en
dc.identifier.issued 1 en
dc.identifier.startpage R3059 en
dc.identifier.endpage R3066 en
dc.identifier.issn 2162-8769
dc.identifier.uri http://hdl.handle.net/10468/6054
dc.identifier.doi 10.1149/2.0081601jss
dc.description.abstract We report intense red luminescence from mesoporous n+-Si(100) nanowires (NWs) and nanocrystal-decorated p-Si NWs fabricated using electroless metal assisted chemical (MAC) etching. n+-Si NWs are composed of a labyrinthine network of silicon nanocrystals in a random mesoporous structure. p-type Si(100) NWs exhibit solid core structure, with a surface roughness that contains surface-bound nanocrystals. Both mesoporous n+-Si NWs and rough, solid p-Si NWs exhibit red luminescence at ∼1.7 and ∼1.8 eV, respectively. Time-resolved photoluminescence (PL) measurements indicated long (tens of μs) radiative recombination lifetimes. The red luminescence is visible with the naked eye and the red light is most intense from mesoporous n+-Si NWs, which exhibit a red-shift in the emission maximum to 1.76 eV at 100 K. The red PL from monolithic arrays of p-type NWs with nanocrystal-decorated rough surfaces is comparatively weak, but originates from the surface bound nanocrystals. Significant PL intensity increase is found during excitation for mesoporous NWs. X-ray photoelectron spectroscopy identifies a stoichiometric SiO2 on the rough p-Si NWs with a SiOx species at the NW surface. No distinct oxide is found on the mesoporous NWs. The analysis confirms that long life-time PL emission arises from quantum confinement from internal nanoscale crystallites, and oxidized surface-bound crystallites, on n+- and p-Si NWs respectively. en
dc.description.sponsorship Higher Education Authority (INSPIRE programme, funded by the Irish Government’s Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007–2013) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Electrochemical Society en
dc.relation.uri http://jss.ecsdl.org/content/5/1/R3059.abstract?cpetoc
dc.rights © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. en
dc.subject Etching en
dc.subject Microscopy en
dc.subject Nanocrystal en
dc.subject Nanomaterials en
dc.subject Nanowires en
dc.subject Photoluminscence en
dc.subject Porous en
dc.subject Silicon en
dc.title Quantum confined intense red luminescence from large area monolithic arrays of mesoporous and nanocrystal-decorated silicon nanowires for luminescent devices en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: c.odwyer@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-05-03T07:44:34Z
dc.description.version Published Version en
dc.internal.rssid 316056464
dc.contributor.funder Higher Education Authority en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Irish Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ECS Journal of Solid State Science and Technology en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en

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