Optical properties of bismuth trioxide thin films
Optical properties of bismuth trioxide thin films
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DOI：
10.1016/s0025-5408(01)00641-9
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发表时间：
2001-07
影响因子：
5.4
通讯作者：
L. Leontie;M. Caraman;M. Delibaş;G. Rusu
中科院分区：
文献类型：
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作者：
L. Leontie;M. Caraman;M. Delibaş;G. Rusu
对于Bi 2 O3薄膜，研究了制备条件对280-1260 nm光谱范围内光吸收的影响。用真空蒸发的Bi薄膜在空气中热氧化制备了直径为0.07-1.50 μm的Bi_2 O_3薄膜。使用玻璃和云母基板。结构研究（通过X-射线衍射和光学偏振显微镜进行）表明，薄膜具有多晶和多相结构。从吸收光谱计算的能隙，Eg（直接跃迁）的值，范围在2.40和3.96 eV之间。Bi_2 O_3薄膜的Egfor值受热处理特性的强烈影响，热处理特性决定了样品的相组成。
For Bi2O3thin films, the influence of preparation conditions on the optical absorption, in the spectral range of 280–1260 nm, was investigated. Bi2O3films (d = 0.07–1.50 μm) were prepared by thermal oxidation, in air, of vacuum evaporated Bi films. Glass and mica substrates were used. Structural investigations (performed by X-ray diffraction and optical polarizing microscopy) showed that films have a polycrystalline and multiphasic structure. The values of energy gap, Eg(direct transitions), calculated from the absorption spectra, ranged between 2.40 and 3.96 eV. The values of Egfor Bi2O3films are strongly influenced by the heat treatment characteristics, which determine the phase composition of samples.