Preparation and characterization of sol–gel TiO2 antireflective coatings for silicon

Vicente, Gema San; Morales, Ángel; Gutiérrez, M.T.

doi:10.1016/s0040-6090(01)00963-4

Cited by 126 publications

(60 citation statements)

References 25 publications

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“…The mesoporous nano TiO 2 /SiO 2 composite is a promising area due to optimum porous size. Nanosized TiO 2 has been fabricated using sol-gel, sputtering, combustion flame, and thermal plasma (Zhang and Xu 2004;San Vicente et al 2001). Although the sol-gel method is considered as a suitable method to synthesize ultra-fine particles, this method needs a large quantity of solution, longer processing time and heat treatment for crystallization since amorphous TiO 2 has a very little photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Kumar¹,

Shyla²,

Xavier³

2012

Appl Nanosci

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The use of titania-silica in photocatalytic process has been proposed as an alternative to the conventional TiO 2 catalysts. Mesoporous materials have been of great interest as catalysts because of their unique textural and structural properties. Mesoporous TiO 2 , SiO 2 nanoparticles and TiO 2 /SiO 2 nanocomposites were successfully synthesized by sol-gel method using titanium (IV) isopropoxide, tetra-ethylorthosilicate as starting materials. The synthesized samples are characterized by X-ray diffraction, UV-Vis spectroscopy, Fourier transform infrared spectroscopy, Brunauett-Emmett-Teller and field-dependent photoconductivity. The UV-Vis spectrum of as-synthesized samples shows similar absorption in the visible range. The crystallite size of the as-synthesized samples was calculated by Scherrer's formula. The BET surface area for TiO 2 /SiO 2 nanocomposite is found to be 303 m 2 /g and pore size distribution has average pore diameter about 10 nm. It also confirms the absence of macropores and the presence of micro and mesopores. The field-dependent photoconductivity of TiO 2 /SiO 2 nanocomposite shows nearly 300 folds more than that of TiO 2 nanoparticle for a field of 800 V/cm.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Kumar¹,

Shyla²,

Xavier³

2012

Appl Nanosci

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“…Titanium oxide is also a well-known semiconductor and it has been shown as one of the most important materials for application as a gas sensor [7]and an antireflective coating [8]. TiO 2 is used in electrochromic devices and solar cells [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Ivanova

Harizanova

Koutzarova

et al. 2011

Journal of Non-Crystalline Solids

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The sol-gel route has been applied to obtain ZnO-TiO 2 thin films. For comparison, pure TiO 2 and ZnO films are also prepared from the corresponding solutions. The films are deposited by a spin-coated method on silicon and glass substrates. Their structural and vibrational properties have been studied as a function of the annealing temperatures (400-750 °C). Pure ZnO films crystallize in a wurtzite modification at a relatively low temperature of 400 °C, whereas the mixed oxide films show predominantly amorphous structure at this temperature. XRD analysis shows that by increasing the annealing temperatures, the sol-gel Zn/Ti oxide films reveal a certain degree of crystallization and their structures are found to be mixtures of wurtzite ZnO, Zn 2 TiO 4 , anatase TiO 2 and amorphous fraction. The XRD analysis presumes that Zn 2 TiO 4 becomes a favored phase at the highest annealing temperature of 750 °C. The obtained thin films are uniform with no visual defects. The optical properties of ZnO-TiO 2 films have been compared with those of single component films (ZnO and TiO 2 ). The mixed oxide films present a high transparency with a slight decrease by increasing the annealing temperature.

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“…[4][5] The main methods of depositing titanium oxide coatings were vacuum evaporation, magnetron sputtering, ion beam technique, sol-gel process, etc. [6][7][8] Among these methods, the sol-gel process presented many advantages, such as simple equipment and low cost, possibility of coating wide areas, high optical quality of films, etc. [8][9] Recently, a "layer-by-layer" self-assembly method has been studied for the deposition of TiO 2 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] Among these methods, the sol-gel process presented many advantages, such as simple equipment and low cost, possibility of coating wide areas, high optical quality of films, etc. [8][9] Recently, a "layer-by-layer" self-assembly method has been studied for the deposition of TiO 2 nanoparticles. The stable TiO 2 films on substrates have formed by the layer-by-layer assembly technique using the organic selfassembled monolayers as the media of the process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cr‐doped TiO₂/SiO₂ Photocatalysts and their Photocatalytic Properties

Chen

Liu

2011

J Chinese Chemical Soc

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Cr-doped TiO 2 /SiO 2 nanostructured materials were prepared employing a layer-by-layer assembly technique. TiO 2 colloids were synthesized by a sol-gel method using TiCl 4 as a precursor. The experimental results showed that sphere-type TiO 2 particles on SiO 2 exhibited uniform shape and a narrow size distribution. The amount of Ti (wt %) increased as a function of the number of the coating layers. The coating layers was composed of anatase titania nanocrystals at 550°C. The onset of band-gap transition for Crdoped TiO 2 /SiO 2 showed a red shift compared with that for the undoped TiO 2 /SiO 2 . And the photocatalytic activity of Cr-doped TiO 2 /SiO 2 was higher than that of undoped sample.

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Preparation and characterization of sol–gel TiO2 antireflective coatings for silicon

Cited by 126 publications

References 25 publications

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Preparation of Cr‐doped TiO₂/SiO₂ Photocatalysts and their Photocatalytic Properties

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Preparation and characterization of sol–gel TiO2 antireflective coatings for silicon

Cited by 126 publications

References 25 publications

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Synthesis and characterization of TiO2/SiO2 nano composites for solar cell applications

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Preparation of Cr‐doped TiO2/SiO2 Photocatalysts and their Photocatalytic Properties

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Preparation of Cr‐doped TiO₂/SiO₂ Photocatalysts and their Photocatalytic Properties