Characteristics and optical properties of iron ion (Fe3+)-doped titanium oxide thin films prepared by a sol–gel spin coating
Characteristics and optical properties of iron ion (Fe3+)-doped titanium oxide thin films prepared by a sol–gel spin coating
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DOI：
10.1016/j.jallcom.2008.05.105
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发表时间：
2009-04
影响因子：
6.2
通讯作者：
Moo-Chin Wang;Huey-Jiuan Lin;Tien-syh Yang
中科院分区：
文献类型：
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作者：
Moo-Chin Wang;Huey-Jiuan Lin;Tien-syh Yang
采用溶胶-凝胶旋涂法在玻璃衬底上制备了不同浓度的Fe3+掺杂的二氧化钛薄膜。利用X射线衍射仪、扫描电子显微镜、紫外可见光谱和椭圆偏振光谱仪研究了不同Fe掺杂含量的TiO2薄膜的特性和光学性质。当Fe3+含量从0增加到25.0wt%时，TiO2薄膜的晶相仅由锐钛矿型的TiO2组成，但结晶度降低。在Fe3+加入量为25.0wt%时，TiO2薄膜仍保持无定形状态。当Fe3+掺杂浓度从0增加到25.0wt%时，TiO2薄膜的吸收边从355 nm向415 nm移动(即红移)。折射率(N)和消光系数(K)随Fe3+含量的增加而减小。随着Fe3+含量从0增加到25.0wt%，TiO2薄膜的带隙能也从3.29 eV降低到2.83 eV。
Titanium dioxide (TiO2) thin films doping of various iron ion (Fe3+) concentrations have been prepared on a glass substrate by the sol–gel spin coating process. Characteristics and optical properties of TiO2thin films doping of various Fe content were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible spectroscopy (UV–vis) and spectroscopic ellipsometry. The crystalline phase of TiO2thin films comprised only the anatase TiO2, but the crystallinity decreased when the Fe3+content increased from 0 to 25.0wt%. During the Fe3+addition to 25.0wt%, the phase of TiO2thin film still maintained the amorphous state. The absorption edge of TiO2thin films shifted towards longer wavelengths (i.e. red shifted) from 355 to 415nm when the Fe3+-doped concentration increased from 0 to 25.0wt%. The values of the refractive index (n), and extinction coefficient (k), decreased with an increasing Fe3+content. Moreover, the band-gap energy of TiO2thin films also decreased from 3.29 to 2.83eV with an increase in the Fe3+content from 0 to 25.0wt%.