Journal
THIN SOLID FILMS
Volume 518, Issue 24, Pages E156-E160Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2010.03.093
Keywords
Sol-gel method; Nanoscale structures; Optical applications; Fe-TiO2 composite film
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Funding
- Ministry of Education Science and Technology
- Korea Science and Engineering Foundation [R15-2006-022-01001-0]
- National Research Foundation of Korea [과C6B2010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, the optical and structural properties of an Fe-TiO2 sol were investigated. TEOT[Ti(OC2H5)(4)] and ferric nitrate[Fe(NO3)(3)center dot 9H(2)O] 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 673.15-873.15 K in intervals of 50 K. 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 3.64 eV. 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. (C) 2010 Elsevier B.V. All rights reserved.
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