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

journal contribution
posted on 01.07.2007, 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.

History

Journal

Optical materials

Volume

29

Issue

11

Pagination

1295 - 1298

Publisher

Elsevier BV

Location

Amsterdam, The Netherlands

ISSN

0925-3467

eISSN

1873-1252

Language

eng

Notes

Available online 24 July 2006.

Publication classification

C1.1 Refereed article in a scholarly journal; C Journal article

Copyright notice

2006, Elsevier B.V.