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

被引：43

作者：

Chen, Hua

Chen, Ying

Liu, Yun ^{[1
]}

Xu, Chao-Nan

Williams, Jim S.

机构：

[1] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

[2] Natl Inst Adv Ind Sci & Technol, Tosu, Saga 8410052, Japan

来源：

OPTICAL MATERIALS | 2007年 / 29卷 / 11期

基金：

澳大利亚研究理事会;

关键词：

boron nitride; nanotube; optical absorption; photoluminiscence; exciton; BN NANOTUBES; CARBON; ABSORPTION;

D O I：

10.1016/j.optmat.2006.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1295 / 1298

页数：4

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