Blue-emitting β-SiC fabricated by annealing C60 coupled on porous silicon
Blue-emitting β-SiC fabricated by annealing C60 coupled on porous silicon
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DOI：
10.1063/1.1290153
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发表时间：
2000-08
影响因子：
4
通讯作者：
Xuewei Wu;G. Siu;M. J. Stokes;D. Fan;Y. Gu;X. Bao
中科院分区：
文献类型：
--
作者：
Xuewei Wu;G. Siu;M. J. Stokes;D. Fan;Y. Gu;X. Bao
C60分子通过偶联剂化学偶联在多孔Si的孔中，然后用Si涂覆一层，然后进行N2退火。X射线衍射结果表明，所制备的样品中除了Si、SiO2和石墨外，还含有β-SiC颗粒。光致发光（PL）光谱显示出一个不对称的宽带，它可以被高斯分为两个带在380（3.26 eV）和454（2.73 eV）nm。光谱分析以及红外光谱和PL激发测量的实验结果表明，380 nm PL带与SiO2基体中的氧空位缺陷有关，而蓝色PL带与β-SiC颗粒密切相关。本实验为制备稳定的β-SiC蓝光材料提供了一条途径。
C60 molecules were chemically coupled in the pores of porous Si through a coupling agent and then coated with a layer of Si, and followed by N2 annealing. X-ray diffraction results indicate that the fabricated samples contain β-SiC particles which may exist in the pores, in addition to Si, SiO2, and graphite. The photoluminescence (PL) spectra show an asymmetrical broadband, which can be Gaussian divided into two bands at 380 (3.26 eV) and 454 (2.73 eV) nm. Spectral analyses and the experimental results from infrared spectroscopy and PL excitation measurements suggest that the 380 nm PL band is related to oxygen-vacancy defects in the SiO2 matrix, whereas the blue PL band is closely connected with the β-SiC particles. Our experiments provide a way for fabricating stable blue-emitting β-SiC materials.