Pulsed cathodoluminescence and Raman spectra of MoS2 nanocrystals at different excitation electron energy densities and laser wavelengths

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dc.contributor.authorBozheyev, Farabi
dc.contributor.authorValiev, Damir
dc.contributor.authorNemkayeva, Renata
dc.creatorFarabi, Bozheyev
dc.date.accessioned2017-12-22T09:16:09Z
dc.date.available2017-12-22T09:16:09Z
dc.date.issued2017-08-01
dc.description.abstractAbstract Molybdenum disulfide nanocrystals exhibit direct dependencies of the Raman peaks' intensities and their positions on the thicknesses of the nanocrystals. This indicates dependencies of the electronic structure on the thickness of the flakes, which scatter differently various laser wavelengths (473nm, 532nm and 633nm). Pulsed cathodoluminescence spectra of MoS2 nanocrystals under the action of high-energy electron pulse show an increase in the luminescence intensities with the increasing input of electron energy densities, where higher electron densities induce greater amount of electron-holes, which afterwards recombining release the energy in the form of luminescence. Irradiation of nanocrystals at maximum electron energy density of 200mJcm−2 leads to a strong luminescence band at 655nm (1.88eV), which is explained by recombination of A exciton. The luminescence decay kinetics of the nanocrystals under the action of different electron energy densities is presented.en_US
dc.identifierDOI:10.1016/j.jlumin.2017.05.001
dc.identifier.citationFarabi Bozheyev, Damir Valiev, Renata Nemkayeva, Pulsed cathodoluminescence and Raman spectra of MoS2 nanocrystals at different excitation electron energy densities and laser wavelengths, In Journal of Luminescence, Volume 188, 2017, Pages 529-532en_US
dc.identifier.issn00222313
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0022231316311097
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/3060
dc.language.isoenen_US
dc.publisherJournal of Luminescenceen_US
dc.relation.ispartofJournal of Luminescence
dc.rights.license© 2017 Elsevier B.V. All rights reserved.
dc.subjectMoS2en_US
dc.subjectNanocrystalen_US
dc.subjectNanopowderen_US
dc.subjectPulsed cathodoluminescenceen_US
dc.subjectRaman spectraen_US
dc.subjectElectron-holesen_US
dc.subjectElectron energy densityen_US
dc.titlePulsed cathodoluminescence and Raman spectra of MoS2 nanocrystals at different excitation electron energy densities and laser wavelengthsen_US
dc.typeArticleen_US
elsevier.aggregationtypeJournal
elsevier.coverdate2017-08-01
elsevier.coverdisplaydateAugust 2017
elsevier.endingpage532
elsevier.identifier.doi10.1016/j.jlumin.2017.05.001
elsevier.identifier.eid1-s2.0-S0022231316311097
elsevier.identifier.piiS0022-2313(16)31109-7
elsevier.identifier.scopusid85028718829
elsevier.openaccess0
elsevier.openaccessarticlefalse
elsevier.openarchivearticlefalse
elsevier.startingpage529
elsevier.teaserMolybdenum disulfide nanocrystals exhibit direct dependencies of the Raman peaks' intensities and their positions on the thicknesses of the nanocrystals. This indicates dependencies of the electronic...
elsevier.volume188
workflow.import.sourcescience

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