Light emission and excitonic effect of boron nitride nanotubes observed by photolumine scent spectra
Light emission and excitonic effect of boron nitride nanotubes observed by photolumine scent spectra
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DOI：
10.1016/j.optmat.2006.05.006
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发表时间：
2007-07-01
影响因子：
3.9
通讯作者：
Williams, Jim S.
中科院分区：
文献类型：
--
作者：
Chen, Hua;Chen, Ying;Williams, Jim S.
系统地研究了高产率多壁BN纳米管(BNNTs)的光致发光(PL)和光学吸收光谱，并与商用六方BN(h-BN)粉末进行了比较。BNNTs的直接带隙为5.75 eV，略小于h-BN粉末的带隙(5.82 eV)。测定了束缚能为1.27 eV和1.35 eV的两个Frenkel激子。然而，它们并不像以前报道的那样是BNNTs的一个显著特征。观察到的广泛的UV-Visible-NIR发光证明了BNNTs作为纳米光源的潜力。(C)2006爱思唯尔B.V.保留所有权利。
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.