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Epitaxial growth of visible to infra-red transparent conducting In2O3 nanodot dispersions and reversible charge storage as a Li-ion battery anode

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dc.contributor.author Osiak, Michal
dc.contributor.author Khunsin, W.
dc.contributor.author Armstrong, E.
dc.contributor.author Kennedy, Tadhg
dc.contributor.author Sotomayor Torres, C.M.
dc.contributor.author Ryan, Kevin M.
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-12-03T12:10:12Z
dc.date.available 2018-12-03T12:10:12Z
dc.date.issued 2013
dc.identifier.uri http://hdl.handle.net/10344/7380
dc.description peer-reviewed en_US
dc.description.abstract Unique bimodal distributions of single crystal epitaxially grown In2O3 nanodots on silicon are shown to have excellent IR transparency greater than 87% at IR wavelengths up to 4 mu m without sacrificing transparency in the visible region. These broadband antireflective nanodot dispersions are grown using a two-step metal deposition and oxidation by molecular beam epitaxy, and backscattered diffraction confirms a dominant (111) surface orientation. We detail the growth of a bimodal size distribution that facilitates good surface coverage (80%) while allowing a significant reduction in In2O3 refractive index. This unique dispersion offers excellent surface coverage and three-dimensional volumetric expansion compared to a thin film, and a step reduction in refractive index compared to bulk active materials or randomly porous composites, to more closely match the refractive index of an electrolyte, improving transparency. The (111) surface orientation of the nanodots, when fully ripened, allows minimum lattice mismatch strain between the In2O3 and the Si surface. This helps to circumvent potential interfacial weakening caused by volume contraction due to electrochemical reduction to lithium, or expansion during lithiation. Cycling under potentiodynamic conditions shows that the transparent anode of nanodots reversibly alloys lithium with good Coulombic efficiency, buffered by co-insertion into the silicon substrate. These properties could potentially lead to further development of similarly controlled dispersions of a range of other active materials to give transparent battery electrodes or materials capable of non-destructive in situ spectroscopic characterization during charging and discharging. en_US
dc.language.iso eng en_US
dc.publisher IOP Publishing en_US
dc.relation RS20102170 en_US
dc.relation.ispartofseries Nantotechnology;24, 065401
dc.rights This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nanotechnology, copyright © 2013 IOS Publishing after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1088/0957-484/24/6/065401 en_US
dc.subject light-emitting-diodes en_US
dc.subject perfect antireflection coatings en_US
dc.subject refractive-index en_US
dc.subject ITO nanowires en_US
dc.subject lithium en_US
dc.title Epitaxial growth of visible to infra-red transparent conducting In2O3 nanodot dispersions and reversible charge storage as a Li-ion battery anode en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2018-12-03T11:48:55Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1088/0957-4484/24/6/065401
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor SFI en_US
dc.relation.projectid RS/2010/2170 en_US
dc.relation.projectid FIS2009-10150 en_US
dc.relation.projectid MAT 2012-31392 en_US
dc.relation.projectid CSD2010-00044 en_US
dc.relation.projectid 2009-SGR-150 en_US
dc.relation.projectid 07/SK/B1232a en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1433797
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Nanotechnology
dc.description.status peer-reviewed


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