Synthesis of doped and undoped TiO&lt;inf&gt;2&lt;/inf&gt; thin films prepared by sol gel

Essalhi, Zineb; Hartiti, Bouchaíb; Siadat, Maryam; Thévenin, Philippe; Lfakir, Abd Errazzak

doi:10.1109/irsec.2016.7983878

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…The transmittance increases and is nearly constant at (44, 49, 57, 62 and 61) % for the concentrations (pure, 3, 5, 7 and 9) % respectively at wavelength 500nm, Table 2. These results of transmittance are in agreement with those of Essalhi et al [16].…”

Section: Resultssupporting

confidence: 93%

Structural and optical properties of TiO2:NiO nanoparticles thin films prepare by chemical spray pyrolysis

Al-Taa’y

Hasan

2021

IJP

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The properties of structural and optical of pure and doped nano titanium dioxide (TiO2) films, prepared using chemical spray pyrolysis (CPS) technique, with different nanosize nickel oxide (NiO) concentrations in the range (3-9)wt% have been studied. X-Ray diffraction (XRD) technique where using to analysis the structure properties of the prepared thin films. The results revealed that the structure properties of TiO2 have polycrystalline structure with anatase phase. The parameters, energy gap, extinction coefficient, refractive index, real and imaginary parts were studied using absorbance and transmittance measurements from a computerized ultraviolet visible spectrophotometer (Shimadzu UV-1601 PC) in the wavelengths range (300-800)nm. Optical properties of TiO2 affected by the adding of NiO impurity where the transmittance increased as NiO concentration increased but with more adding the transmittance returned to decrease again. It was found the extinction coefficient, refractive index, real and imaginary parts values decreased with increasing doping percentage up to 7% and then increases occur one more again at 9%. Energy gap values increased after doping with NiO where the values lies in the range was 3.31 to 3.51 eV .

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Section: Resultssupporting

confidence: 93%

Structural and optical properties of TiO2:NiO nanoparticles thin films prepare by chemical spray pyrolysis

Al-Taa’y

Hasan

2021

IJP

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“…Its large band gap permits it to absorb only in the nearultraviolet region and makes it insensitive to the visible light. So, TiO 2 films have high transmittance values in the visible region [9]. The properties and hence the applications of TiO 2 depend on its synthesizing method.…”

Section: Introductionmentioning

confidence: 99%

The effect of post-annealing treatment on the structural and optoelectronic properties of solution-processed TiO2 thin films

El-Henawey

Kubas

El-Shaer

et al. 2021

J Mater Sci: Mater Electron

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Electron and hole transporting layers are considered the key element of the fabrication of a high-performance photovoltaic device. An efficient electron transport layer (ETL) must provide better electrons extraction by minimizing the charge recombination rate. In the current work, we have successfully fabricated a solution-processed titanium dioxide (TiO 2 ) thin film using a simple deposition technique to serve as an effective ETL for photovoltaic applications. The prepared TiO 2 underwent different annealing processes during the deposition process to provide two sets of compact TiO 2 (c-TiO 2 ) thin films. The first set was annealed at a relatively low temperature (125 °C) and labeled as pristine TiO 2 , while the second set underwent an additional annealing process at 500 °C and labeled as post-annealed TiO 2 . The effect of post-annealing treatment on the structural and optoelectronic properties of the TiO 2 layers was studied using FT-IR, XRD, SEM, UV-Vis absorption, and photoluminescence (PL) analysis. The post-annealed TiO 2 thin film showed better crystallinity and larger grain sizes than the pristine TiO 2 . In addition, the optoelectronic investigations showed that the post-annealed TiO 2 had lower band gap energy and higher photocatalytic activity, qualifying it to act as an effective ETL. Finally, the performance of the TiO 2 electron transport layers was tested by fabricating two solar cell devices. It was found that the post-annealed TiO 2 layer exhibits a better device performance than the pristine TiO 2 by approximately a 21% increase in the power conversion efficiency (PCE).

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“…The material has been synthesized using various methods. These includes chemical bath deposition (CBD), [16] chemical vapor deposition (CVD), [17] hydrothermal, [18] spin coating, [19] pulsed-DC magnetron sputtering, [20] dip coating, [21] sol-gel, [22] spray pyrolysis, [23] successive ionic layer adsorption and reaction method (SILAR). [24] Among these, CBD is an effective method to prepare TiO2 films at low temperatures.…”

Section: : Introductionmentioning

confidence: 99%

Study of Structural, Optical, Morphology and Photoelectrochemical Properties of Melanin Sensitized TiO2 Thin Films Prepared by Chemical Bath Deposition Method

Vairale¹,

Sharma²,

Waghmare³

et al. 2020

ES Mater. Manuf.

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Herein, we report the synthesis of TiO2 thin films by using the simple, inexpensive, low-temperature chemical bath deposition (CBD) method and annealed at 300, 400, and 500 °C. The obtained TiO2 thin films were sensitized with melanin. Influence of annealing temperature on structural, optical, morphology, and photoelectrochemical cell properties were investigated using a variety of techniques such as low angle XRD, Raman spectroscopy, scanning electron microscopy (SEM), UV-Visible spectroscopy, linear sweep voltammetry (LSV), Mott-Schottky (MS), electrochemical impedance spectroscopy (EIS), etc. We found that sensitization of TiO2 with melanin changes its phase from pure rutile to rutile-anatase mixed-phase and the average crystallite size of melanin sensitized TiO2 films lower than TiO2 films over the entire range of annealing temperature studied. SEM analysis shows the development of microcracks when TiO2 is sensitized with melanin. UV-Visible spectroscopy analysis showed that TiO2 films absorb mainly in the UV region whereas melanin sensitized TiO2 thin films absorb significantly in the visible region. Upon melanin sensitization, TiO2 films show a decrease in current density and flat band potential besides an increase in depletion width when annealing temperature increased from 300 °C to 500 °C. Furthermore, EIS analysis revealed that melanin sensitized TiO2 has high charge transfer resistance. The obtained results showed that sensitization of TiO2 with melanin is not advantageous for photocatalytic water splitting.

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Synthesis of doped and undoped TiO<inf>2</inf> thin films prepared by sol gel

Cited by 3 publications

References 17 publications

Structural and optical properties of TiO2:NiO nanoparticles thin films prepare by chemical spray pyrolysis

Structural and optical properties of TiO2:NiO nanoparticles thin films prepare by chemical spray pyrolysis

The effect of post-annealing treatment on the structural and optoelectronic properties of solution-processed TiO2 thin films

Study of Structural, Optical, Morphology and Photoelectrochemical Properties of Melanin Sensitized TiO2 Thin Films Prepared by Chemical Bath Deposition Method

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