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Light emission and excitonic effect of boron nitride nanotubes observed by photoluminescent spectra

Chen, Hua; Chen, Ying; Liu, Yun; Xu, Chao-Nan; Williams, James


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...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Optical Materials
DOI: 10.1016/j.optmat.2006.05.006


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