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Light emission and excitonic effect of boron nitride nanotubes observed by photoluminescent spectra
journal contributionposted on 2007-07-01, 00:00 authored by Hua Chen, Ying (Ian) ChenYing (Ian) Chen, Y Liu, C N Xu, J Williams
Photoluminescent (PL) and optical absorption spectra of high-yield multi-wall BN nanotubes (BNNTs) were systematically investigated at room temperature in comparison with commercial hexagonal BN (h-BN) powder. The direct band gap of the BNNTs was determined to be 5.75 eV, just slightly narrower than that of h-BN powder (5.82 eV). Two Frenkel excitons with the binding energy of 1.27 and 1.35 eV were also determined. However, they were not a distinctive characteristic of the BNNTs as reported previously. Observed broad UV–visible–NIR light emission demonstrates the potential of the BNNTs as a nano light source.
Pagination1295 - 1298
LocationAmsterdam, The Netherlands
NotesAvailable online 24 July 2006.
Publication classificationC1.1 Refereed article in a scholarly journal; C Journal article
Copyright notice2006, Elsevier B.V.