Effect of solution composition on anatase to rutile transformation of sprayed TiO2 thin films

Albert Owino Juma; Ilona Oja Acik; Valdek Mikli; Arvo Mere; Malle Krunks

doi:10.1016/j.tsf.2015.03.036

Effect of solution composition on anatase to rutile transformation of sprayed TiO₂ thin films

Albert Owino Juma, Ilona Oja Acik, Valdek Mikli, Arvo Mere, Malle Krunks

Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Acetylacetone is used as a chelating agent for titanium(IV) isopropoxide to inhibit hydrolysis and stabilize the precursor solution. The effect of the molar ratio between titanium(IV) isopropoxide and acetylacetone of 1:1, 1:2, 1:3 and 1:4 in the precursor solution on the morphological, structural and optical properties of TiO₂ thin film was investigated. These properties were studied using Fourier transformed infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and UV-vis spectroscopy as a function of the molar ratios for the as-deposited thin films and films annealed at temperatures of 700, 800 and 950 °C. Mixed anatase and rutile phases were detected after annealing at 800 °C for 1:1 and 1:2 molar ratios and at 700 °C for 1:3 and 1:4 molar ratios. The optical band gap decreased from 3.45 to 3.02 eV with an increase in the annealing temperature in agreement with corresponding structural changes.

Original language	English
Pages (from-to)	287-292
Number of pages	6
Journal	Thin Solid Films
Volume	594
DOIs	https://doi.org/10.1016/j.tsf.2015.03.036
Publication status	Published - Nov 2 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/j.tsf.2015.03.036

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title = "Effect of solution composition on anatase to rutile transformation of sprayed TiO2 thin films",

abstract = "Acetylacetone is used as a chelating agent for titanium(IV) isopropoxide to inhibit hydrolysis and stabilize the precursor solution. The effect of the molar ratio between titanium(IV) isopropoxide and acetylacetone of 1:1, 1:2, 1:3 and 1:4 in the precursor solution on the morphological, structural and optical properties of TiO2 thin film was investigated. These properties were studied using Fourier transformed infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and UV-vis spectroscopy as a function of the molar ratios for the as-deposited thin films and films annealed at temperatures of 700, 800 and 950 °C. Mixed anatase and rutile phases were detected after annealing at 800 °C for 1:1 and 1:2 molar ratios and at 700 °C for 1:3 and 1:4 molar ratios. The optical band gap decreased from 3.45 to 3.02 eV with an increase in the annealing temperature in agreement with corresponding structural changes.",

author = "Juma, {Albert Owino} and Acik, {Ilona Oja} and Valdek Mikli and Arvo Mere and Malle Krunks",

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year = "2015",

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doi = "10.1016/j.tsf.2015.03.036",

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T1 - Effect of solution composition on anatase to rutile transformation of sprayed TiO2 thin films

AU - Juma, Albert Owino

AU - Acik, Ilona Oja

AU - Mikli, Valdek

AU - Mere, Arvo

AU - Krunks, Malle

PY - 2015/11/2

Y1 - 2015/11/2

N2 - Acetylacetone is used as a chelating agent for titanium(IV) isopropoxide to inhibit hydrolysis and stabilize the precursor solution. The effect of the molar ratio between titanium(IV) isopropoxide and acetylacetone of 1:1, 1:2, 1:3 and 1:4 in the precursor solution on the morphological, structural and optical properties of TiO2 thin film was investigated. These properties were studied using Fourier transformed infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and UV-vis spectroscopy as a function of the molar ratios for the as-deposited thin films and films annealed at temperatures of 700, 800 and 950 °C. Mixed anatase and rutile phases were detected after annealing at 800 °C for 1:1 and 1:2 molar ratios and at 700 °C for 1:3 and 1:4 molar ratios. The optical band gap decreased from 3.45 to 3.02 eV with an increase in the annealing temperature in agreement with corresponding structural changes.

AB - Acetylacetone is used as a chelating agent for titanium(IV) isopropoxide to inhibit hydrolysis and stabilize the precursor solution. The effect of the molar ratio between titanium(IV) isopropoxide and acetylacetone of 1:1, 1:2, 1:3 and 1:4 in the precursor solution on the morphological, structural and optical properties of TiO2 thin film was investigated. These properties were studied using Fourier transformed infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and UV-vis spectroscopy as a function of the molar ratios for the as-deposited thin films and films annealed at temperatures of 700, 800 and 950 °C. Mixed anatase and rutile phases were detected after annealing at 800 °C for 1:1 and 1:2 molar ratios and at 700 °C for 1:3 and 1:4 molar ratios. The optical band gap decreased from 3.45 to 3.02 eV with an increase in the annealing temperature in agreement with corresponding structural changes.

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DO - 10.1016/j.tsf.2015.03.036

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VL - 594

SP - 287

EP - 292

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Effect of solution composition on anatase to rutile transformation of sprayed TiO₂ thin films

Abstract

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