Comparison of Thin Films of Titanium Dioxide Deposited by Sputtering and Sol–Gel Methods for Waveguiding Applications

Brella, M.; Taabouche, Adel; Gharbi, B.; Gheriani, R.; Bouachiba, Yassine; Bouabellou, A.; Serrar, Hacene; Touil, S.; Laggoune, K.; Boudissa, M.

doi:10.1134/s106378262106004x

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…[1,16,17] Importantly, other porous metal oxides also gained attention as promising energy materials like porous iron, tin, and zinc oxides. [18][19][20] Contrary, studies about porous mixed semimetal films are relatively rare up to now. [21][22][23] In this regard, especially Si and germanium (Ge) as anodes in Li-ion batteries (LIBs) show huge benefits such as high theoretical specific capacities (Si: 4200 mAh g À1 , Ge: 1600 mAh g À1 ) and high diffusion coefficient paired with good cycling performance compared to graphite (372 mAh g À1 ).…”

Section: Introductionmentioning

confidence: 99%

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Weindl,

Wu,

Fajman

et al. 2023

Adv Energy and Sustain Res

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Amphiphilic diblock copolymer poly(styrene‐b‐ethylene oxide) templating in combination with sol–gel chemistry is utilized to synthesize porous mixed silicon/germanium/potassium/carbon (Si/Ge/K/C) thin films. As a Si/Ge source, the dissolvable Zintl phase K12Si12Ge5 is used. The toluene‐mediated morphological changes in the porous mixed Si/Ge/K/C thin films are studied with scanning electron microscopy and grazing incidence small/wide‐angle X‐Ray scattering. A dichloromethane solvent vapor annealing step is applied to study the additional morphological transformation inside the films. Since Ge and Si are promising anode materials in Li‐ion batteries, CR2032 half‐cells are manufactured with the porous mixed Si/Ge/K/C thin films and characterized by cyclic voltammograms, cycling, and impedance spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Weindl,

Wu,

Fajman

et al. 2023

Adv Energy and Sustain Res

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“…The low refractive index indicates the high porosity of TiO 2 thin films with low thickness. The porosity of thin films depends on the coating method, thickness of the thin film, and annealing temperature [27,28].…”

Section: Resultsmentioning

confidence: 99%

Investigation of optical and electrical properties of TiO₂, SiO₂, and Ag single and multilayer thin films using spectroscopic ellipsometry and spectrophotometry methods: prepared by spin coating and DC magnetron sputtering

Entezarmahdi,

Sedghi

2024

Phys. Scr.

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In this work, spectroscopic ellipsometry was used to study the optical and electrical properties of TiO2 and SiO2 thin films deposited by spin-coating at different coating rotation speeds and annealed at various temperatures. In addition, Ag thin films of different thicknesses were deposited by DC magnetron sputtering at ambient temperature. In this method, the optical band gap for TiO2 thin films is between 2.4-3.25 eV, and for SiO2 thin films, it is between 3.2-3.6 eV.The optical properties, including reflectance, transmittance, and absorbance, of TiO2, SiO2, and Ag thin films in the form of single and multilayer thin films in the wavelength range of 200-2500 nm, were investigated using an ultraviolet-visible-near infrared (UV-Vis-NIR) dual-beam spectrophotometer. In the TiO2/Ag/SiO2 multilayer thin film, the rejection was 58.6% -73.6% in the NIR wavelength range (800-2500 nm), and a transmittance of 40%-45% was achieved in the visible light range (400-700 nm).

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“…In DSCs, TiO 2 is the most distinguished candidate for the photoanode. TiO 2 achieved high efficiencies due to its large band gap compared to traditional semiconductors and excellent physical properties such as chemical and optical stability and corrosion resistance [8,9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Triphenylamine-Based Organic Dyes with Dual Anchors for Efficient Dye-Sensitized Solar Cells

et al. 2022

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A new series of metal-free organic dyes (SM1-5) with dual anchors are synthesized for application in dye-sensitized solar cells (DSSC). Here, a simple triphenylamine (TPA) moiety serves as the electron donor, while di-cyanoacrylamide and di-thiazolidine-5-one units serve as the electron acceptors and anchoring groups. To understand the effect of dye structure on the photovoltaic characteristics of DSSCs, the photophysical and electrochemical properties, as well as molecular geometries calculated from density functional theory (DFT), are used for dyes SM1-5. The extinction coefficients of the organic dyes SM1-5 are high (5.36–9.54 104 M−1 cm−1), indicating a high aptitude for light harvesting. The photovoltaic studies indicated that using dye SM4 as a sensitizer showed a power conversion efficiency (PCE) of 6.09% (JSC = 14.13 mA cm−2, VOC = 0.624 V, FF = 68.89%). Interestingly, SM4 showed the highest values of VOC among all dyes, including N-719, due to its maximum dye coverage on the TiO2 surface, enhancing charge recombination resistance in the sensitized cell. The good agreement between the theoretically and experimentally obtained data indicates that the energy functional and basis set employed in this study can be successfully utilized to predict new photosensitizers' absorption spectra with great precision before synthesis. Also, these results show that bi-anchoring molecules have a lot of potentials to improve the overall performance of dye-sensitized solar cells.

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Comparison of Thin Films of Titanium Dioxide Deposited by Sputtering and Sol–Gel Methods for Waveguiding Applications

Cited by 5 publications

References 22 publications

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Investigation of optical and electrical properties of TiO₂, SiO₂, and Ag single and multilayer thin films using spectroscopic ellipsometry and spectrophotometry methods: prepared by spin coating and DC magnetron sputtering

Synthesis of Novel Triphenylamine-Based Organic Dyes with Dual Anchors for Efficient Dye-Sensitized Solar Cells

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Comparison of Thin Films of Titanium Dioxide Deposited by Sputtering and Sol–Gel Methods for Waveguiding Applications

Cited by 5 publications

References 22 publications

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Toluene‐Mediated Morphology Tuning of Diblock Copolymer‐Templated Porous Si/Ge/K/C Thin Films for Li‐Ion Batteries

Investigation of optical and electrical properties of TiO2, SiO2, and Ag single and multilayer thin films using spectroscopic ellipsometry and spectrophotometry methods: prepared by spin coating and DC magnetron sputtering

Synthesis of Novel Triphenylamine-Based Organic Dyes with Dual Anchors for Efficient Dye-Sensitized Solar Cells

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Resources

About

Investigation of optical and electrical properties of TiO₂, SiO₂, and Ag single and multilayer thin films using spectroscopic ellipsometry and spectrophotometry methods: prepared by spin coating and DC magnetron sputtering