Light emission and excitonic effect of boron nitride nanotubes observed by photoluminescent spectra
Data(s) |
01/07/2007
|
---|---|
Resumo |
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.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier BV |
Relação |
http://dro.deakin.edu.au/eserv/DU:30016476/chen-lightemission-2007.pdf http://dx.doi.org/10.1016/j.optmat.2006.05.006 |
Direitos |
2006, Elsevier B.V. |
Palavras-Chave | #boron nitride #nanotube #optical absorption #photoluminescence #exciton |
Tipo |
Journal Article |