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dc.contributor.authorKaralis, Aristeidis
dc.contributor.authorJoannopoulos, John
dc.date.accessioned2017-12-07T16:24:40Z
dc.date.available2017-12-07T16:24:40Z
dc.date.issued2017-10
dc.date.submitted2017-07
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/1721.1/112629
dc.description.abstractTransparent conducting electrodes play a fundamental role in far-field PhotoVoltaic systems, but have never been thoroughly investigated for near-field applications. Here we show, in the context of near-field planar ultra-thin ThermoPhotoVoltaic cells using surface-plasmon-polariton thermal emitters, that the resonant nature of the nanophotonic system significantly alters the design criteria for the necessary conducting front electrode. The traditional ratio of optical-to-DC conductivities is alone not an adequate figure of merit, instead the desired impedance matching between the emitter and absorber modes along with their coupling to the free-carrier resonance of the front electrode are key for optimal device design and performance. Moreover, we demonstrate that conducting electrodes 'opaque' to incoming far-field radiation can, in fact, be used in the near field with decent performance by taking advantage of evanescent photon tunneling from the emitter to the absorber. Finally, we identify and compare appropriate tunable-by-doping materials for front electrodes in near-field ThermoPhotoVoltaics, specifically molybdenum-doped indium oxide, dysprosium-doped cadmium oxide, graphene and diffused semiconductors, but also for 'opaque' electrodes, tin-doped indium oxide and silver nano-films. Predicted estimated performances include output power density ~10 W/cm 2 with > 45% efficiency at 2100 °K emitter temperature and 60 Ω electrode square resistance, thus increasing the promise for high-performance practical devices.en_US
dc.description.sponsorshipMassachusetts Institute of Technology. Institute for Soldier Nanotechnologies ( Contract W911NF-13-D-0001)en_US
dc.publisherNature Publishing Groupen_US
dc.relation.isversionofhttp://dx.doi.org/10.1038/s41598-017-13540-8en_US
dc.rightsCreative Commons Attribution 4.0 Internationalen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.sourceNatureen_US
dc.titleTransparent and ‘opaque’ conducting electrodes for ultra-thin highly-efficient near-field thermophotovoltaic cellsen_US
dc.typeArticleen_US
dc.identifier.citationKaralis, Aristeidis, and Joannopoulos, J. D. “Transparent and ‘opaque’ Conducting Electrodes for Ultra-Thin Highly-Efficient Near-Field Thermophotovoltaic Cells.” Scientific Reports 7, 1 (October 2017): 14046 © 2017 The Author(s)en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Research Laboratory of Electronicsen_US
dc.contributor.mitauthorKaralis, Aristeidis
dc.contributor.mitauthorJoannopoulos, John
dc.relation.journalScientific Reportsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2017-12-06T19:56:39Z
dspace.orderedauthorsKaralis, Aristeidis; Joannopoulos, J. D.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-4719-0222
dc.identifier.orcidhttps://orcid.org/0000-0002-7244-3682
mit.licensePUBLISHER_CCen_US


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