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Effect of heat treatment on TiO2 thin films properties
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نویسنده
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el fanaoui a. ,taleb a. ,el hamri e. ,boulkaddat l. ,kirou h. ,atourki l. ,ihlal a. ,bouabid k.
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منبع
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journal of materials and environmental science - 2016 - دوره : 7 - شماره : 3 - صفحه:907 -914
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چکیده
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The aim of this study was to investigate the influence of the annealing temperature on the structural and optical properties of tio2 thin films,deposited by chemical bath deposition method (cbd) onto glass substrates. the x-ray diffraction (xrd) experiments show that the well-known anatase phase was observed for some annealing temperature. the best conditions of crystallization were found upon annealing at temperatures higher than 400 °c in the air. the surface morphology of the deposited films characterized by the field-emission gun scanning electron microscope (fegsem) consists of granular texture with a clear identified grain at the surface. the size of the grains is more than 100 nm and increases with annealing temperature. the uv-vis-nir spectroscopy shows that our films exhibit a high value of optical transmission which is around 80%. the indirect band gap of the deposited films was found to range between 3.17 and 3.44 ev depending on the annealing temperature. the urbach energy increases with the annealing temperature.
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کلیدواژه
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Anatase; Band gap; Chemical bath deposition; Rutile; Titanium dioxide
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آدرس
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laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir,morocco,ecole supérieure de technologie de guelmim (estg),avenue abou maachar al balkhi,b.p.: 1317,guelmim, Morocco, institut de recherche de chimie paris,cnrs,chimie paristech,11 rue pierre et marie curie,paris,france,sorbonne universités,upmc univ paris 06,paris, France, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco, laboratory materials and renewable energies (lmre),ibn zoh university,dep. physics,faculty of science,bp8106,hay dakhla,agadir, Morocco
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Authors
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