Synthesis and optical analysis of nanostructured F-doped ZnO thin films by spray pyrolysis: Transparent electrode for photocatalytic applications

Abdel-Galil, A.; Hussien, Mai S. A.; Yahia, I.S.

doi:10.1016/j.optmat.2021.110894

Cited by 49 publications

(12 citation statements)

References 51 publications

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“…9a, b. The intercept (E 0 /E d ) and the slope (E 0 E d ) −1 can be used (10) to calculate the dispersion parameters E 0 and E d . Table 5 demonstrates the values of the dispersion parameters E 0 and E d for ZnO fresh and annealed thin films.…”

Section: Structural Study Of Nanostructured Zno Thin Filmsmentioning

confidence: 99%

“…The stability of ZnO against photocorrosion and photo-chemical characteristics makes it a potential candidate for solar power conversion as a semiconductive material [8,9]. Also, it has been considered as a promising material for water and wastes treatment according to its high activity, environment-friendly merit, and low price [10][11][12]. ZnO as explained in previous works can decay organic dyes such as methylene blue, rhodamine B, methyl red, and methyl orange under UV irradiation [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Thin films of ZnO would be more appropriate as a photocatalyst especially in the water treatment because the photocatalytic material remains fixed and can be removed easily by redrawing the film from the treated water. So, the thin films of ZnO can be considered as promising structures for photocatalytic applications [10,18] because of many factors such as small size, lightweight, stability, reusability, and ability to configure in different frameworks compared to their nanoparticles counterparts. The physical and chemical properties of ZnO can be tailored for different applications by a variety of processing techniques, such as synthesis procedures, doping mechanism optimization, introduction of impurities, controlling the microstructure, and thickness of the films.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the development of ZnO thin films and powders in nano-scale has led to more efficient electronic and optoelectronic devices. ZnO thin films can be prepared using various methods, such as magnetron sputtering technique [19], molecular beam epitaxy (MBE) [20], metal organic chemical vapor deposition (MOCVD) [21], pulsed laser deposition (PLD) [22], spray pyrolysis [10,23], ultrasonic spray [24], and sol-gel process [25]. However, the sol-gel spin-coating method is more convenient among the other methods, because of low-cost, accurate compositional control, low crystallization temperature, homogeneity at the molecular level, and easy reproducibility.…”

Section: Introductionmentioning

confidence: 99%

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Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

2022

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Thin films of ZnO, with distinct thicknesses, were deposited on soda-lime glass substrates by sol–gel spin-coating as a cost-effective method without any evacuation facilities. The nanocrystalline structure of the deposited films was indexed by the atomic force microscope and X-ray diffraction techniques. The average grain size increases with the increase of the film thickness and annealing temperature. The energy-dispersive X-ray technique has been used to check the atomic ratios of Zn and O with the film thickness and heat treatment for homogeneous ZnO films. ZnO films show elevated transmission in the visible spectrum as a transparent semiconductor material. Optical constants, like absorption coefficient, optical band gap, and refractive index, were obtained by the Swanepoel method. All thin film samples were applied for photodegradation of reactive orange 96 (RO96) to evaluate the effect of thickness and annealing temperature on the ZnO film’s photocatalytic activity. ZnO 4L (400 °C, 3 h) film possesses the highest rate of photodegradation about 0.1 min−1 for RO96 with high stability and reusability.

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Section: Structural Study Of Nanostructured Zno Thin Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

2022

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“…ZnO has many applications such as light emitting diodes [2], field-effect transistors [3], gas sensors [4], photodiode ( [5], solar cell [6], Photocatalys [7]. the wide energy band gap of Zinc oxide (ZnO) and high transparency in the visible range [8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the optical properties of ZnO thin films deposited on a glass substrate by the So-gel method

Amananti

Ardiyanto

Sutanto

et al. 2022

J. Nat. Scien. & Math. Res.

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Zinc oxide (ZnO) has attracted the attention of researchers as a photocatalyst material, because ZnO has a wide direct band gap (3.37 eV) and is a semiconductor material with a large excitation binding energy (60 meV). ZnO is a photocatalyst that has many advantages, namely cheap, non-toxic, and theoretically very active under UV irradiation. The most interesting thing about ZnO semiconductor compared to other semiconductors is that ZnO can absorb most of the solar spectrum. However, there is a weakness of the ZnO semiconductor, namely the very fast recombination of charge carriers and the ZnO semiconductor has a low efficiency in the visible region which causes the ZnO semiconductor to have a wide band gap. that is the weakness of ZnO. it is necessary to choose the right method to overcome this deficiency of ZnO. one way that can be done is to increase the photocatalytic ability of zinc oxide, it is necessary to develop it in the manufacture of thin films. The method used in the manufacture of Thin Film is using the sol-gel spray coating method. the first stage is through the manufacture of ZnO precursors by dissolving zinc acetate dehydrate with isopropanol solvent through stirring. then the second stage by adding Monoethanolamine. This stirring lasted for 30 minutes at a temperature of 70°C, the precursor concentration was prepared with three different concentrations which included concentrations of 0.1, 0.3, and 0.5 M. ZnO precursor deposited on the substrate glass is blown at 400 °C. Optical properties are carried out by recording the transmittance and absorbance which are affected by increasing concentrations. The optical transmission spectra show that the transmission increases with decreasing concentration and the maximum transmission in the visible region is about 90% for ZnO thin films prepared with 0.1 M. The optical band gap value produced by the thin film of 0.1 M precursor concentration resulted in an energy band gap of 3.11 eV; thin films of 0.3 M precursor concentration produced an energy band gap of 3.07 eV; and thin film of 0.5M precursor concentration produced an energy band gap of 3.06 eV.©2022 JNSMR UIN Walisongo. All rights reserved.

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Magnetotransport Properties of Microstructured ZnO Thin Films Grown on a‐ and r‐Plane Sapphire Substrates

Barzola‐Quiquia¹,

Zelaya

Espíndola

et al. 2023

Physica Status Solidi (b)

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The transparent semiconductor ZnO has attracted substantial interest in the research community because of its potential applications as a transparent thin film, [1][2][3] transistor, [4][5][6] optoelectronic devices, [7][8][9] light-emitting diode, [10,11] among others. Another promising, non-inherent property is its roomtemperature ferromagnetism, which was first theoretically predicted to occur through doping with transition magnetic ions such as Fe, Co, or Ni. [12] However, many experimental studies revealed that the observed magnetic order is not related to the doping but certain defects. [13][14][15][16][17] A ferromagnetic ZnO, free of d-elements, opens new opportunities for applications in spintronics. The origin of the defect-induced magnetism (DIM) in defective ZnO samples is not always simple to explain, especially in samples where defects are introduced during the preparation of the samples, like Zn-or O-vacancies [15] or grain boundaries. [18] In these cases, the reproducibility of the magnetic order is low. Also, usual experimental techniques, such as SQUID (superconducting quantum interface device) magnetometry, cannot simply distinguish between defect-induced magnetic signals and those from other sources, like magnetic impurities on the samples or substrates. [19] However, recent theoretical and experimental studies using element-specific magnetic probes like X-ray magnetic circular dichroism (XMCD) in X-ray absorption spectroscopy [20] strongly suggest that Zn vacancies are the primary origin for the observed magnetic order in this compound. Oxygen vacancies, present in a more significant concentration than Zn vacancies, do not substantially contribute to the magnetic order due to their much smaller magnetic moment.Due to the low mass of thin films and weak magnetic signals (compared to the substrate), standard SQUID magnetometers are not the best choice for the magnetic characterization of ZnO thin films. Accounting for the influence of substrates by performing electrical transport measurements with an applied magnetic field is helpful. The measurement of the magnetoresistance (MR) and Hall effect (HE) [21] are powerful tools to explore the magnetic properties of conducting materials. In the case of MR, the sign of ferromagnetism is the opening of a butterfly-like hysteresis around zero field with extremes at fields corresponding to the coercive fields (H C ). When considering the HE, the appearance of an anomalous nonlinear contribution at low fields, in addition to the opening of a hysteresis with sign changes at fields corresponding to the coercive field, would be the case. We notice, however, that the field hysteresis depends on the coercive field of the investigated sample. Because H C is relatively weak in magnetic ZnO samples, that is, μ 0 Â H C ≤ 0.1 T, [15] high resolution is necessary to measure the hysteresis around zero field in the MR or HE. In general, with the field and temperature dependence of electrical-transport properties, it is possible to

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Synthesis and optical analysis of nanostructured F-doped ZnO thin films by spray pyrolysis: Transparent electrode for photocatalytic applications

Cited by 49 publications

References 51 publications

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

Analysis of the optical properties of ZnO thin films deposited on a glass substrate by the So-gel method

Magnetotransport Properties of Microstructured ZnO Thin Films Grown on a‐ and r‐Plane Sapphire Substrates

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