Correlation between structural and optical properties of ion beam synthesized β-FeSi2 precipitates in Si
Correlation between structural and optical properties of ion beam synthesized β-FeSi2 precipitates in Si
复制标题
离子束合成 Si 中 β-FeSi2 沉淀结构与光学性质的相关性
DOI：
10.1016/s0022-2313(98)00149-5
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发表时间：
1998
影响因子：
3.6
通讯作者：
V. Meregalli
中科院分区：
文献类型：
--
作者：
M. Grimaldi;S. Coffa;C. Spinella;F. Marabelli;M. Galli;L. Miglio;V. Meregalli
利用透射电镜、光致发光（PL）分析和近红外透射测量研究了离子束合成β-FeSi 2沉淀物的结构和光学性质。在无位错样品中观察到β-FeSi_2沉淀的PL谱由1.54μm的尖线和1.46μm的弱峰组成。光学透射测量表明，直接带隙比连续β-FeSi_2薄膜小约0.8eV。对β-FeSi_2在不同晶格参数下电子能带的计算表明，这种降低是由于晶格应变引起的能带畸变.
The structural and optical properties of β-FeSi2precipitates produced by ion beam synthesis have been investigated by transmission electron microscopy, photoluminescence (PL) analysis and near infrared transmission measurements. The PL spectrum of β-FeSi2precipitates in a dislocation free sample has been observed to consist of a sharp line at 1.54μm and a weak peak at 1.46μm. Optical transmission measurements showed a direct band gap about 0.8eV smaller than in continuous β-FeSi2film. Calculation of the electronic bands of β-FeSi2for different values of the lattice parameters indicates that this reduction can be ascribed to band distortion provided by the lattice strain.