CVD grown 2D MoS2 layers: a photoluminescence and fluorescence lifetime imaging study

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dc.citation.epage796en_US
dc.citation.issueNumber11en_US
dc.citation.spage792en_US
dc.citation.volumeNumber10en_US
dc.contributor.authorÖzden, A.en_US
dc.contributor.authorŞar, H.en_US
dc.contributor.authorYeltik A.en_US
dc.contributor.authorMadenoğlu, B.en_US
dc.contributor.authorSevik, C.en_US
dc.contributor.authorAy, F.en_US
dc.contributor.authorPerkgöz, N. K.en_US
dc.date.accessioned2018-04-12T10:58:06Z
dc.date.available2018-04-12T10:58:06Z
dc.date.issued2016en_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractIn this letter, we report on the fluorescence lifetime imaging and accompanying photoluminescence properties of a chemical vapour deposition (CVD) grown atomically thin material, MoS2. µ-Raman, µ-photoluminescence (PL) and fluorescence lifetime imaging microscopy (FLIM) are utilized to probe the fluorescence lifetime and photoluminescence properties of individual flakes of MoS2 films. Usage of these three techniques allows identification of the grown layers, grain boundaries, structural defects and their relative effects on the PL and fluorescence lifetime spectra. Our investigation on individual monolayer flakes reveals a clear increase of the fluorescence lifetime from 0.3 ns to 0.45 ns at the edges with respect to interior region. On the other hand, investigation of the film layer reveals quenching of PL intensity and lifetime at the grain boundaries. These results could be important for applications where the activity of edges is important such as in photocatalytic water splitting. Finally, it has been demonstrated that PL mapping and FLIM are viable techniques for the investigation of the grain-boundaries. (Figure presented.). © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheimen_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:58:06Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2016en
dc.identifier.doi10.1002/pssr.201600204en_US
dc.identifier.issn1862-6254
dc.identifier.urihttp://hdl.handle.net/11693/36946
dc.language.isoEnglishen_US
dc.publisherWiley-VCH Verlagen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/pssr.201600204en_US
dc.source.titlePhysica Status Solidi - Rapid Research Lettersen_US
dc.subjectChemical vapor depositionen_US
dc.subjectFluorescence lifetime imaging microscopyen_US
dc.subjectMoS2en_US
dc.subjectPhotoluminescenceen_US
dc.subjectRaman spectroscopyen_US
dc.subjectTwo-dimensional materialsen_US
dc.titleCVD grown 2D MoS2 layers: a photoluminescence and fluorescence lifetime imaging studyen_US
dc.typeArticleen_US

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