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dc.contributor.authorSanctis, Adolfo De
dc.contributor.authorJones, Gareth F.
dc.contributor.authorWehenkel, Dominique J.
dc.contributor.authorBezares, Francisco
dc.contributor.authorKoppens, Frank H. L.
dc.contributor.authorCraciun, Monica F.
dc.contributor.authorRusso, Saverio
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2017-06-07T14:54:07Z
dc.date.available2017-06-07T14:54:07Z
dc.date.issued2017-05-26
dc.identifier.citationSanctis, A. D. [et al.]. Extraordinary linear dynamic range in laser-defined functionalized graphene photodetectors. "Scientific Advances", 26 Maig 2017, vol. 3, núm. 5.
dc.identifier.issn2375-2548
dc.identifier.urihttp://hdl.handle.net/2117/105212
dc.description.abstractGraphene-based photodetectors have demonstrated mechanical flexibility, large operating bandwidth, and broadband spectral response. However, their linear dynamic range (LDR) is limited by graphene’s intrinsic hot-carrier dynamics, which causes deviation from a linear photoresponse at low incident powers. At the same time, multiplication of hot carriers causes the photoactive region to be smeared over distances of a few micrometers, limiting the use of graphene in high-resolution applications. We present a novel method for engineering photoactive junctions in FeCl3-intercalated graphene using laser irradiation. Photocurrent measured at these planar junctions shows an extraordinary linear response with an LDR value at least 4500 times larger than that of other graphene devices (44 dB) while maintaining high stability against environmental contamination without the need for encapsulation. The observed photoresponse is purely photovoltaic, demonstrating complete quenching of hot-carrier effects. These results pave the way toward the design of ultrathin photodetectors with unprecedented LDR for high-definition imaging and sensing.
dc.language.isoeng
dc.publisherScience
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshGraphene
dc.subject.othergrafè
dc.titleExtraordinary linear dynamic range in laser-defined functionalized graphene photodetectors
dc.typeArticle
dc.subject.lemacGrafè
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://advances.sciencemag.org/content/3/5/e1602617/tab-pdf
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/613024/EU/GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES/GRASP
upcommons.citation.publishedtrue
upcommons.citation.publicationNameScientific Advances
upcommons.citation.volume3
upcommons.citation.number5
upcommons.citation.startingPagee1602617
dc.identifier.pmid28560334


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