Structural and optical properties of TiO2 thin films grown by sol-gel dip coating process

Bouachiba, Yassine; Bouabellou, A.; Hanini, Faouzi; Kermiche, Fouad; Taabouche, Adel; Boukheddaden, Kamel

doi:10.2478/s13536-013-0147-z

Cited by 23 publications

(16 citation statements)

References 25 publications

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“…The measured values of the refractive index are in good agreement with that of the samples obtained by sol-gel methods [7,22,23]. The deduced value of the thickness agrees well with that obtained by RBS measurements.…”

Section: Waveguiding Measurementssupporting

confidence: 85%

“…Sol-gel growth process is well known for its capacity to provide TiO 2 thin films with high optical quality, suitable for waveguiding applications [7][8][9]. It offers also many advantages such as high purity, good uniformity of the film microstructure, low temperature synthesis, low cost, easily controlled reaction conditions and possibility to use different substrates.…”

Section: Introductionmentioning

confidence: 99%

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TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

Bouachiba

Taabouche

Bouabellou

et al. 2020

Materials Science-Poland

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TiO2 thin films have been deposited on glass substrates with and without ZnO underlayer by sol-gel dip coating process. XRD patterns show the formation of anatase phase with the diffraction lines (1 0 1) and (2 0 0) in TiO2/glass sample. In TiO2/(ZnO/glass) sample, TiO2 is composed of anatase phase with the diffraction line (2 0 0) but the diffraction peaks of ZnO wurtzite are also well-defined. The determination of the refractive index and the thickness of the waveguiding layers has been performed by m-lines spectroscopy. The thickness of TiO2 thin films deduced by Rutheford Backscattering Geometry (RBS) agrees well with that obtained by m-lines spectroscopy. TiO2/glass sample exhibits one guided TE0 and TM0 polarized modes. In TiO2/(ZnO/glass) sample, only, TE0 single mode has been excited due to cutoff condition.

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Section: Waveguiding Measurementssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

Bouachiba

Taabouche

Bouabellou

et al. 2020

Materials Science-Poland

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“…Where α is the absoption coefficient, hυ is the photon energy and m is a factor governing the transition types; m = 1/2 for a direct gap such as SnO 2 and equals to 2 for an indirect band gap semiconductor such as TiO 2 since the indirect band-band transition is the most dominant [6,22]. In this way, TiO 2 :SnO 2 composites are considered as indirect band gap semiconductor since TiO 2 is the major phase.…”

Section: Uv-visible Analysismentioning

confidence: 99%

“…We observe the excitation of one guided mode for both TE 0 and TM 0 polarizations in all samples. Under the assumption of the isotropic refractive index [6,27], the refractive index and the thickness of the samples are deduced and listed in table 2. TiO 2 :SnO 2 films are thinner than those of TiO 2 (the thickness decreases from 210 nm for TiO 2 to 164 nm for TiO 2 :SnO 2 (6:4) thin films).…”

Section: Waveguiding Measurementsmentioning

confidence: 99%

“…TiO 2 and SnO 2 oxides have several advantageous properties such as availability, good thermal stability, low cost, easy to elaboration, good acid resistance, high band gap compared to traditional semi-conductors (3-4 eV) [1,2] and excellent optical quality. These properties make them attractive materials for several applications such as antireflective coating, optical filter, planar waveguides and solar cells [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Medjaldi

Bouabellou

Bouachiba

et al. 2020

Mater. Res. Express

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In this research TiO 2 , SnO 2 and TiO 2 :SnO 2 nanocomposite thin films were fabricated by the sol-gel dip coating technique. The mixture was prepared by varying the molar ratio of SnO 2 to TiO 2 , i.e. TiO 2 :SnO 2 (9:1), TiO 2 :SnO 2 (8:2) and TiO 2 :SnO 2 (6:4)). The obtained samples were characterized by means of the Raman microscopy, Scanning Electron Microscopy (SEM), UV-Vis spectrophotometry and m-lines spectroscopy (Prism coupler). Raman analysis shows that pure TiO 2 and SnO 2 thin films are characterized by the vibrational modes of anatase and rutile cassiterite, respectively. Furthermore, the Raman spectra of the TiO 2 :SnO 2 nanocomposites show the presence of a mixture of anatase and rutile TiO 2 phases. The SEM images reveal that the morphology is clearly modified with SnO 2 content. The ripples in the transmittance spectra decreased with increasing SnO 2 content. Also, the evolution of the optical band gap seems to be consistent with the Raman analysis. A great attention has been paid to the refractive index measurements by the prism coupler technique. In this way, variable-refractive index systems have been successfully obtained using TiO 2 :SnO 2 nanocomposite thin films.

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Theoretical validation of experimental properties of TiO₂ prepared through organometallic precursors

Doubi

Hartiti

Siadat

et al. 2023

Applied Organom Chemis

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Our TiO 2 thin films were elaborated using spray pyrolysis technique. The spray solutions were prepared by two titanium precursors: titanium (IV) propoxide and titanium chloride. The elaborated thin films were analyzed with different characterization techniques such as X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and UV-visible spectroscopy.These characterizations showed that the change of precursors from titanium chloride to titanium propoxide has a significant impact on all TiO 2 properties.The structural characterizations showed the formation of anatase TiO 2 and the crystallization improvement when the precursor changed from titanium chloride to titanium (IV) propoxide, which proves the superiority of our TiO 2 thin layers made without any type of annealing in comparison with other previous studies. The SEM images showed an improvement of the surface quality of the TiO 2 thin layers with the change of TiO 2 precursors' solution. The obtained optical properties confirmed the semiconducting properties of TiO 2 prepared by titanium propoxide with a large band gap equal to 3.28 eV and shifted to 3.18 eV. The refractive index increases from $1.75 to $2.14, while the porosity decreases. To confirm the experimental results, the Wien2K code, founded on the full-potential linearized augmented plane wave (FP-LAPW), has been used. The theoretical study has been done by applying the generalized gradient approximation (GGA), the modified Beck-Johnson (MBJ) exchange potential, and the local spin density approximation + Hubbard's parameter U (LSDA + U). The theoretical results varied with the variation of approximations. The obtained properties were improved with LSDA + U and acquired the real values of Eg, n, and k for anatase TiO 2 (like Eg = 3.214 eV). The obtained experimental and theoretical results could be considered superposable or better than other ones recently published.

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Structural and optical properties of TiO2 thin films grown by sol-gel dip coating process

Cited by 23 publications

References 25 publications

TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Theoretical validation of experimental properties of TiO₂ prepared through organometallic precursors

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Structural and optical properties of TiO2 thin films grown by sol-gel dip coating process

Cited by 23 publications

References 25 publications

TiO2 waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

TiO2 waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

Study of TiO2, SnO2 and nanocomposites TiO2:SnO2 thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Theoretical validation of experimental properties of TiO2 prepared through organometallic precursors

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Product

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TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

TiO₂ waveguides thin films prepared by sol-gel method on glass substrates with and without ZnO underlayer

Study of TiO₂, SnO₂ and nanocomposites TiO₂:SnO₂ thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

Theoretical validation of experimental properties of TiO₂ prepared through organometallic precursors