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나노물질및화학반응연구단
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Hot carrier multiplication on graphene/TiO2 Schottky nanodiodes

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dc.contributor.authorYoung Keun Lee-
dc.contributor.authorChoi, H-
dc.contributor.authorHyunsoo Lee-
dc.contributor.authorChanghwan Lee-
dc.contributor.authorChoi, JS-
dc.contributor.authorChoi, CG-
dc.contributor.authorHwang, E-
dc.contributor.authorJeong Young Park-
dc.date.available2016-07-21T02:40:52Z-
dc.date.created2016-07-18ko
dc.date.issued2016-06-
dc.identifier.issn2045-2322-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/2696-
dc.description.abstractCarrier multiplication (i.e. generation of multiple electron-hole pairs from a single high-energy electron, CM) in graphene has been extensively studied both theoretically and experimentally, but direct application of hot carrier multiplication in graphene has not been reported. Here, taking advantage of efficient CM in graphene, we fabricated graphene/TiO2 Schottky nanodiodes and found CM-driven enhancement of quantum efficiency. The unusual photocurrent behavior was observed and directly compared with Fowler's law for photoemission on metals. The Fowler's law exponent for the graphene-based nanodiode is almost twice that of a thin gold film based diode; the graphene-based nanodiode also has a weak dependence on light intensity-both are significant evidence for CM in graphene. Furthermore, doping in graphene significantly modifies the quantum efficiency by changing the Schottky barrier. The CM phenomenon observed on the graphene/TiO2 nanodiodes can lead to intriguing applications of viable graphene-based light harvesting.-
dc.description.uri1-
dc.language영어-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleHot carrier multiplication on graphene/TiO2 Schottky nanodiodes-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000377478100002-
dc.identifier.scopusid2-s2.0-84976514177-
dc.identifier.rimsid56047ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorYoung Keun Lee-
dc.contributor.affiliatedAuthorHyunsoo Lee-
dc.contributor.affiliatedAuthorChanghwan Lee-
dc.contributor.affiliatedAuthorJeong Young Park-
dc.identifier.doi10.1038/srep27549-
dc.identifier.bibliographicCitationSCIENTIFIC REPORTS, v.6, pp.27549-
dc.citation.titleSCIENTIFIC REPORTS-
dc.citation.volume6-
dc.citation.startPage27549-
dc.date.scptcdate2018-10-01-
dc.description.wostc4-
dc.description.scptc10-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.subject.keywordPlusTANDEM SOLAR-CELL-
dc.subject.keywordPlusELECTRON FLOW-
dc.subject.keywordPlusINTERNAL PHOTOEMISSION-
dc.subject.keywordPlusLAYER GRAPHENE-
dc.subject.keywordPlusDIRAC POINT-
dc.subject.keywordPlusINTERFACE-
dc.subject.keywordPlusENERGY-
dc.subject.keywordPlusEFFICIENCY-
dc.subject.keywordPlusSCATTERING-
dc.subject.keywordPlusCONVERSION-
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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