Visible and IR photoluminescence of c-FeSi@a–Si core–shell nano-fibres produced by vapour transport

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dc.contributor.authorThabethe, Sibongiseni
dc.contributor.authorLinganiso, Ella
dc.contributor.authorMotaung, David
dc.contributor.authorMashapa, Matete G.
dc.contributor.authorNkosi, Steven
dc.contributor.authorArendse, Christopher
dc.contributor.authorMwakikung, Bonex W.
dc.date.accessioned2018-03-05T13:31:44Z
dc.date.available2018-03-05T13:31:44Z
dc.date.issued2013
dc.description.abstractThe procedures for the synthesis of amorphous ε-FeSi/Sicore–shell nanofibres by vapour transport in a CVD configuration are reported. Crystallite studies by the Williamson-Hall method show the sizes to be typically about 8.0nm which agrees with TEM value of 7.9nm fibre diameter with a compressive strain of about 0.04. Features in the photoluminescence of these FeSi core–shells in both visible and IR are at 410nm,1062nm,1414nm and 1772nm and absorption feature at 1000cm−1 from FTIR are explained from density functional theory(DFT) abinitio calculations. PL confirms the intra-band transition whereas FTIR agrees perfectly with the band-to-band transition whose band gap energy is 0.13eV for FeSi. FTIR also unveils inter-bandtransition which DFT calculation could not predict. Raman spectroscopy data confirm FeSi and nano-Sipresence.en_US
dc.description.accreditationWeb of Science
dc.identifier.citationThabethe, S. et al. (2013). Visible and IR photoluminescence of c-FeSi@a-Si core-shell nanofibres produced by vapour transport. Journal of luminescence, 143: 113 – 119.en_US
dc.identifier.issn0022-2313
dc.identifier.urihttp://dx.doi.org/10.1016/j.jlumin.2013.04.020
dc.identifier.urihttp://hdl.handle.net/10566/3565
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherElsevieren_US
dc.rightsThis is the author-version of the article published online at: http://dx.doi.org/10.1016/j.jlumin.2013.04.020
dc.status.ispeerreviewedTRUE
dc.subjectPhotoluminescenceen_US
dc.subjectFeSien_US
dc.subjectIron monosilicideen_US
dc.subjectBand structureen_US
dc.subjectDOSen_US
dc.subjectDFTen_US
dc.titleVisible and IR photoluminescence of c-FeSi@a–Si core–shell nano-fibres produced by vapour transporten_US
dc.typeArticleen_US

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