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Unusually efficient photocurrent extraction in monolayer van der Waals heterostructure by tunnelling through discretized barriers

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dc.contributor.authorWoo Jong Yu-
dc.contributor.authorQuoc An Vu-
dc.contributor.authorHye Min Oh-
dc.contributor.authorHonggi Nam-
dc.contributor.authorHailong Zhou-
dc.contributor.authorSoonyoung Cha-
dc.contributor.authorJoo-Youn Kim-
dc.contributor.authorAlexandra Carvalho-
dc.contributor.authorMun Seok Jeong-
dc.contributor.authorHyunyong Choi-
dc.contributor.authorA.H. Castro Neto-
dc.contributor.authorYoung Hee Lee-
dc.contributor.authorXiangfeng Duan-
dc.date.available2017-01-20T08:30:58Z-
dc.date.created2016-12-19ko
dc.date.issued2016-11-
dc.identifier.issn2041-1723-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/3250-
dc.description.abstractTwo-dimensional layered transition-metal dichalcogenides have attracted considerable interest for their unique layer-number-dependent properties. In particular, vertical integration of these two-dimensional crystals to form van der Waals heterostructures can open up a new dimension for the design of functional electronic and optoelectronic devices. Here we report the layer-number-dependent photocurrent generation in graphene/MoS2/graphene heterostructures by creating a device with two distinct regions containing one-layer and seven-layer MoS2 to exclude other extrinsic factors. Photoresponse studies reveal that photoresponsivity in one-layer MoS2 is surprisingly higher than that in seven-layer MoS2 by seven times. Spectral-dependent studies further show that the internal quantum efficiency in one-layer MoS2 can reach a maximum of 65%, far higher than the 7% in seven-layer MoS2. Our theoretical modelling shows that asymmetric potential barriers in the top and bottom interfaces of the graphene/one-layer MoS2/graphene heterojunction enable asymmetric carrier tunnelling, to generate usually high photoresponsivity in one-layer MoS2 device. (c) The Author(s) 2016-
dc.description.uri1-
dc.language영어-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleUnusually efficient photocurrent extraction in monolayer van der Waals heterostructure by tunnelling through discretized barriers-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000387267700001-
dc.identifier.scopusid2-s2.0-84995488505-
dc.identifier.rimsid57951ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorQuoc An Vu-
dc.contributor.affiliatedAuthorHye Min Oh-
dc.contributor.affiliatedAuthorHonggi Nam-
dc.contributor.affiliatedAuthorMun Seok Jeong-
dc.contributor.affiliatedAuthorYoung Hee Lee-
dc.identifier.doi10.1038/ncomms13278-
dc.identifier.bibliographicCitationNATURE COMMUNICATIONS, v.7, pp.13278-
dc.citation.titleNATURE COMMUNICATIONS-
dc.citation.volume7-
dc.citation.startPage13278-
dc.date.scptcdate2018-10-01-
dc.description.wostc26-
dc.description.scptc28-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.subject.keywordPlusTRANSITION-METAL DICHALCOGENIDES-
dc.subject.keywordPlusVERTICAL HETEROSTRUCTURES-
dc.subject.keywordPlusGRAPHENE HETEROSTRUCTURES-
dc.subject.keywordPlusINSULATOR-TRANSITION-
dc.subject.keywordPlusLAYERED MATERIALS-
dc.subject.keywordPlusFILMS-
dc.subject.keywordPlusELECTRONICS-
dc.subject.keywordPlusTRANSISTORS-
dc.subject.keywordPlusCRYSTALS-
dc.subject.keywordPlusMOS2-
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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