Optical and structural properties of Fe–TiO2 thin films prepared by sol–gel dip coating

In this study, the optical and structural properties of an Fe-TiO2 sol were investigated. TEOT[Ti(OC2H5)4] and ferric nitrate[Fe(NO3)3a[cent9H2O] were used as precursors to make the Fe-TiO2 sol. The samples for measurement were prepared on a glass substrate using the sol-gel dip coating method. The...

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Bibliographic Details
Published in:Thin solid films 2010-10, Vol.518 (24), p.e156-e160
Main Authors: Kim, Nam Jin, La, Young Hoon, Im, Sang Hyeok, Ryu, Bong Ki
Format: Article
Language:English
Subjects:
Crystal structure
Cut-off
Diffraction
Immersion coating
Iron
Optical properties
Sol gel process
Thin films
X-rays
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Summary:In this study, the optical and structural properties of an Fe-TiO2 sol were investigated. TEOT[Ti(OC2H5)4] and ferric nitrate[Fe(NO3)3a[cent9H2O] were used as precursors to make the Fe-TiO2 sol. The samples for measurement were prepared on a glass substrate using the sol-gel dip coating method. The annealing temperature (T a) was varied in the range of 673.15-873.15K in intervals of 50K. The cut-off points of the samples were increasingly red-shifted with increasing Fe content. Simultaneously, the optical band gap decreased from 4.03 to 3.64eV. A change of the crystalline phase as the Fe content increased was observed from the X-ray diffraction measurements. Combined with the X-ray diffraction analysis, the observed variations in both the cut-off points and optical band gap were directly correlated with the structural change of the composite films.
ISSN:0040-6090
DOI:10.1016/j.tsf.2010.03.093