Structural, Optical and Luminescence Properties of ZnO Thin Films Prepared by Sol-Gel Spin-Coating Method: Effect of Precursor Concentration

Amari, Rabie; Mahroug, Abdelhafid; Boukhari, Ammar; Deghfel, B.; Selmi, N.

doi:10.1088/0256-307x/35/1/016801

Cited by 34 publications

(12 citation statements)

References 42 publications

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“…[25] The lattice constants of Mn-doped ZnO thin films with different deposited layers are estimated using the structure factor for the wurtzite structure. [26] The c-axis constant of Mndoped ZnO thin films decreased slightly from 5.198 Å (5 layers) to 5.195 Å (20 layers) with the increase of coating number (Table 1), and all obtained values were less than the bulk value 5.207 Å (JCPDS 36-1451). This variation showed inversely proportional to the slight shift toward the higher angles of the (002) peak 2 position with the increase of the coating number.…”

Section: Structural Propertiesmentioning

confidence: 89%

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Thickness Effect on the Properties of 4% Mn‐Doped ZnO Thin Films Grown by Sol‐Gel Spin Coating Deposition

Boukhari

Deghfel

Mahroug

et al. 2021

Macromolecular Symposia

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In this study, the thickness effect of 4% Mn‐doped ZnO thin films on structural, optical, and morphological properties is investigated. The films are deposited on a glass substrate using the sol‐gel spin coating method. Phase analysis indicates that all films have a hexagonal wurtzite structure with a high preferential c‐axis orientation. All structural parameters are significantly influenced by the thickness variations. The optical analysis reveals that transmittance and band gap energy decrease with thickness. A red shift of the absorption edge is noticed. The surface morphology shows a good uniformity for all ZnO films. The surface roughness of the samples increases with film thicknesses. The photoluminescence (PL) spectra show a UV peak at 388 nm with two blue peaks at 438 and 475 nm and a weak green emission peak at 525 nm. A lower PL intensity is noticed by increasing the thickness. The obtained results exhibit similarities in behavior as other methods.

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Section: Structural Propertiesmentioning

confidence: 89%

“…The origin of the NBE emission was due to free exciton emission. [26] However, the origin of the emissions in the visible region has not been exactly determined. Many researchers proposed the origins for these emission peaks at the same wavelength.…”

Section: Optical Propertiesmentioning

confidence: 99%

Thickness Effect on the Properties of 4% Mn‐Doped ZnO Thin Films Grown by Sol‐Gel Spin Coating Deposition

Boukhari

Deghfel

Mahroug

et al. 2021

Macromolecular Symposia

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“…The peaks are again better defined for sample ZnAl31MW-650, probably because of the higher crystallinity of the LDH precursor. The reflection planes (JCPDS 75-0576) are identified in the figure and correspond to the wurtzite-type structure [32][33][34]. No peaks corresponding to crystalline phases of Al oxides are recorded, meaning that, after calcination, aluminum remains forming amorphous phases, which might correspond to some sort of alumina, or even singly dispersed within the ZnO phase.…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

Activity in the Photodegradation of 4-Nitrophenol of a Zn,Al Hydrotalcite-Like Solid and the Derived Alumina-Supported ZnO

2020

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A Zn,Al layered double hydroxide (LDH), with the hydrotalcite structure and the mixed oxide obtained upon its calcination at 650 °C, was tested in the adsorption and photocatalytic degradation of 4-Nitrophenol in aqueous solution. The Zn,Al LDH was fast and easily obtained by the coprecipitation method. Hydrothermal treatment under microwave irradiation was applied to compare the effect of the ageing treatment on the photocatalytic behavior. The efficiency of the synthetized solids was compared to that of a commercial ZnO. The ageing treatment did not improve the performance of the original samples in the degradation of 4-nitrophenol. The activity of the synthetized solids tested exceeded that observed for the reaction with commercial ZnO. The photocatalytic performance of the original non-calcined hydrotalcite is similar to that of commercial ZnO. The calcined hydrotalcite showed a better performance in the adsorption-degradation of the contaminant than ZnO, and its reusability would be possible as it recovered the hydrotalcite-like structure during the reaction.

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“…The molar ratio of the solvent (monoethanolamine; MEA) to metal ions was fixed at 1.0 and the concentration of metal ions was 0.7 M. The Mn dopant concentration was chosen as 12.5 mol%. The subsequent steps were discussed in our previous works (Amari et al, 2018;Mahroug et al, 2017).…”

Section: Experimental and Theoretical Detailsmentioning

confidence: 99%

“…Variety of techniques have been used to prepare ZnO thin films. Because of its simplicity, low cost, safety, large area deposition, controllability of compositions and uniformity of thickness, the sol-gel method has attracted much attention (Amari et al, 2018;Mahroug et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Experimental and First Principles Study of Structural, Electronic and Optical Properties of Zn0.875Mn0.125O Thin Film

Deghfel¹,

Mahroug²,

Amari³

et al. 2018

The International Conference on Advanced Materials and Systems

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Zn0.875Mn0.125O thin films are fabricated by a simple sol-gel spin-coating technique on glass substrates using zinc acetate dehydrate [Zn(CH3COO)2•2H2O] and manganese acetate tetrahydrate [Mn(CH3COO)24H2O]as a starting material and doping source. Isopropanol and monoethanolamine (MEA) were used as solvent and stabilizer, respectively. X-ray diffraction, ultraviolet-visible spectroscopy and photoluminescence spectroscopy are employed to investigate the effect of Mn doping on the structural, electronic and optical properties of ZnO thin films. The obtained results are compared with those using first-principles calculation based on density functional theory (DFT) with local density approximation (LDA) plus Hubbard U (DFT-LDA+U) method. This latter represents the theoretical framework to deal with strongly correlated materials to predicted successfully the electronic properties of such materials.

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Structural, Optical and Luminescence Properties of ZnO Thin Films Prepared by Sol-Gel Spin-Coating Method: Effect of Precursor Concentration

Cited by 34 publications

References 42 publications

Thickness Effect on the Properties of 4% Mn‐Doped ZnO Thin Films Grown by Sol‐Gel Spin Coating Deposition

Thickness Effect on the Properties of 4% Mn‐Doped ZnO Thin Films Grown by Sol‐Gel Spin Coating Deposition

Activity in the Photodegradation of 4-Nitrophenol of a Zn,Al Hydrotalcite-Like Solid and the Derived Alumina-Supported ZnO

Experimental and First Principles Study of Structural, Electronic and Optical Properties of Zn0.875Mn0.125O Thin Film

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