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Near-field spectral mapping of individual exciton complexes of monolayer WS2 correlated with local defects and charge population

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dc.contributor.authorYongjun Lee-
dc.contributor.authorSeok Joon Yun-
dc.contributor.authorYoung Bum Kim-
dc.contributor.authorMin Su Kim-
dc.contributor.authorGang Hee Han-
dc.contributor.authorA. K. Sood-
dc.contributor.authorJeongyong Kim-
dc.date.available2017-05-19T01:12:51Z-
dc.date.created2017-02-24-
dc.date.issued2017-02-
dc.identifier.issn2040-3364-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/3461-
dc.description.abstractExciton transitions are mostly responsible for the optical properties of transition metal dichalcogenide monolayers (1L-TMDs). Extensive studies of optical and structural characterization indicated that the presence of local structural defects and charge population critically influence the exciton emissions of 1L-TMDs. However, due to large variations of sample and experimental conditions, the exact mechanism of the exciton emission influenced by local structural defects and charge population is not clearly understood. In this work by using near-field scanning optical imaging and spectroscopy, we directly visualized spatially-and spectrally-resolved emission profiles of excitons, trions and defect bound excitons in CVD-grown monolayer tungsten disulfide (1L-WS2) with ∼70 nm spatial resolution. We found that exciton emission is spatially uniform while emission of trions and defect bound excitons was strongly modulated by the presence of structural features such as defects and wrinkles. We also visually observe a strong correlation between local charge accumulation and the trion formation upon increased photo-excitation. © The Royal Society of Chemistry-
dc.description.uri1-
dc.language영어-
dc.publisherROYAL SOC CHEMISTRY-
dc.titleNear-field spectral mapping of individual exciton complexes of monolayer WS2 correlated with local defects and charge population-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000395626600022-
dc.identifier.scopusid2-s2.0-85012155354-
dc.identifier.rimsid58846ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorYongjun Lee-
dc.contributor.affiliatedAuthorSeok Joon Yun-
dc.contributor.affiliatedAuthorYoung Bum Kim-
dc.contributor.affiliatedAuthorJeongyong Kim-
dc.identifier.doi10.1039/c6nr08813a-
dc.identifier.bibliographicCitationNANOSCALE, v.9, no.6, pp.2272 - 2278-
dc.citation.titleNANOSCALE-
dc.citation.volume9-
dc.citation.number6-
dc.citation.startPage2272-
dc.citation.endPage2278-
dc.date.scptcdate2018-10-01-
dc.description.wostc8-
dc.description.scptc8-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.subject.keywordPlusTRANSITION-METAL DICHALCOGENIDES-
dc.subject.keywordPlusMOLYBDENUM-DISULFIDE-
dc.subject.keywordPlusGRAIN-BOUNDARIES-
dc.subject.keywordPlusPHOTOLUMINESCENCE ENHANCEMENT-
dc.subject.keywordPlus2-DIMENSIONAL SEMICONDUCTORS-
dc.subject.keywordPlusTUNGSTEN DISULFIDE-
dc.subject.keywordPlusNEUTRAL EXCITONS-
dc.subject.keywordPlusLIGHT-EMISSION-
dc.subject.keywordPlusMOS2-
dc.subject.keywordPlusWSE2-
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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