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

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Date

2007

Authors

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

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

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.

Description

Keywords

Keywords: Boron nitride; Energy gap; Excitons; Light absorption; Light emission; Photoluminescence spectroscopy; Temperature distribution; Ultraviolet radiation; Boron nitride nanotubes; Frenkel excitons; Nano light source; Nanotubes Boron nitride; Exciton; Nanotube; Optical absorption; Photoluminescence

Citation

URI

http://hdl.handle.net/1885/29000

Collections

ANU Research Publications

Source

Optical Materials

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.optmat.2006.05.006

Restricted until

2037-12-31

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