Hot-electron injection in Au nanorod-ZnO nanowire hybrid device for near-infrared photodetection

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dc.contributor.authorPescaglini, Andrea
dc.contributor.authorMartín, Alfonso
dc.contributor.authorCammi, Davide
dc.contributor.authorJuska, Gediminas
dc.contributor.authorRonning, Carsten
dc.contributor.authorPelucchi, Emanuele
dc.contributor.authorIacopino, Daniela
dc.contributor.funderSeventh Framework Programmeen
dc.contributor.funderFP7 People: Marie-Curie Actionsen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.date.accessioned2019-07-10T15:11:22Z
dc.date.available2019-07-10T15:11:22Z
dc.date.issued2014-10-14
dc.date.updated2019-07-10T14:59:22Z
dc.description.abstractIn this Letter, we present a new class of near-infrared photodetectors comprising Au nanorods-ZnO nanowire hybrid systems. Fabricated hybrid FET devices showed a large photoresponse under radiation wavelengths between 650 and 850 nm, accompanied by an "ultrafast" transient with a time scale of 250 ms, more than 1 order of magnitude faster than the ZnO response under radiation above band gap. The generated photocurrent is ascribed to plasmonic-mediated generation of hot electrons at the metal-semiconductor Schottky barrier. In the presented architecture, Au-nanorod-localized surface plasmons were used as active elements for generating and injecting hot electrons into the wide band gap ZnO nanowire, functioning as a passive component for charge collection. A detailed investigation of the hot electron generation and injection processes is discussed to explain the improved and extended performance of the hybrid device. The quantum efficiency measured at 650 nm was calculated to be approximately 3%, more than 30 times larger than values reported for equivalent metal/semiconductor planar photodetectors. The presented work is extremely promising for further development of novel miniaturized, tunable photodetectors and for highly efficient plasmonic energy conversion devices.en
dc.description.sponsorshipHigher Education Authority (HEA PRTLI programs (Cycle 3 “Nanoscience” and Cycle 4 “INSPIRE”), and the Irish Higher Education Authority Program for Research in Third Level Institutions (2007-2011) via the INSPIRE programme)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationPescaglini, A., Martín, A., Cammi, D., Juska, G., Ronning, C., Pelucchi, E. and Iacopino, D. (2014) 'Hot-Electron Injection in Au Nanorod–ZnO Nanowire Hybrid Device for Near-Infrared Photodetection', Nano Letters, 14(11), pp. 6202-6209.en
dc.identifier.doi10.1021/n15024854en
dc.identifier.endpage6209en
dc.identifier.issn1530-6984
dc.identifier.journaltitleNanolettersen
dc.identifier.startpage6202en
dc.identifier.urihttps://hdl.handle.net/10468/8136
dc.identifier.volume14en
dc.language.isoenen
dc.publisherAmerican Chemical Society, ACSen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/265073/EU/Semiconductor nanowires: from fundamental physics to device applications/NANOWIRINGen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP1::NMP/263091/EU/Hybrid Molecule-Nanocrystal Assemblies for Photonic and Electronic Sensing Applications/HYSENSen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Frontiers Programme (RFP)/09/RFP/CAP2455/IE/Nanoelectrode arrays exhibiting enhanced electrochemical and electrogenerated chemiluminescence functionality/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Principal Investigator Programme (PI)/10/IN.1/I3000/IE/Controlling deterministically engineered III-V nanostructures: towards quantum information devices/en
dc.relation.urihttps://pubs.acs.org/doi/abs/10.1021/nl5024854
dc.rights© 2014 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/nl5024854en
dc.subjectPlasmonen
dc.subjectHot electron nanowireen
dc.subjectAu nanoroden
dc.subjectPhotodetectoren
dc.subject2D nanoparticle arraysen
dc.subjectMetal nanocrystalsen
dc.subjectInterfacesen
dc.subjectPhotocurrenten
dc.subjectCarriersen
dc.subjectFilmsen
dc.titleHot-electron injection in Au nanorod-ZnO nanowire hybrid device for near-infrared photodetectionen
dc.typeArticle (peer-reviewed)en
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