Influence of the sol gel synthesis parameters on the photoluminescence properties of ZnO nanoparticles

Bekkari, Rabab; Laânab, L.; Boyer, Damien; Mahiou, Rachid; Jaber, B.

doi:10.1016/j.mssp.2017.07.027

Cited by 63 publications

(22 citation statements)

References 50 publications

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“…Thereby, the lower ratios of MEA would decrease the Zn 2+ condensation rate in the (002) plane (of low surface free energy) and finally improve the growth along other orientations as (100). Comparable results were obtained by Bekkari et al [3]. The structural parameters of samples calculated by different formulas are presented in Table 3.…”

Section: Structural Studysupporting

confidence: 70%

“…Zinc oxide (ZnO) is one of the more attractive semiconducting metal oxides owing to its interesting properties including a wide and direct bandgap (3.37 eV) and large exciton binding energy (60 meV) as well as high transparency [1][2][3][4][5][6]. For that, ZnO thin film is an excellent candidate for many applications, such as transparent electrodes [7], ultraviolet photoconductive detectors [8], piezoelectric transducers [9], gas sensors [10], and solar cell [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Solvents and Stabilizer Molar Ratio on the Growth Orientation of Sol-Gel-Derived ZnO Thin Films

Bekkari

Jaber²,

Labrim

et al. 2019

International Journal of Photoenergy

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This work targets to control the growth orientation of sol-gel-derived ZnO thin films in order to allow different modes of excitation (longitudinal and transverse) when targeted to be used in piezoelectric applications. For that, the effect of solvents and stabilizer molar ratio on the structural and optical characteristics of the obtained films is investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectrophotometry. The XRD results show clearly that the synthesized films exhibit hexagonal wurtzite structure without any secondary phases and that the crystallite average size, estimated by the Scherrer formula, is ranged between 13 and 30 nm. The main finding of this work is to show that the control of the crystalline growth orientation is possible simply by varying the solvent nature and/or the stabilizer molar ratio. These later parameters are therefore considered as key factors when seeking to develop the ZnO-based transducers. Actually, the ZnO thin films synthesized with propanol as solvent are oriented only along the c-axis; meanwhile, when using the isopropanol or ethanol, other preferential orientations appear. Additionally, the effect of MEA molar ratio (r) has been studied on the propanol-derived films (the unfavorable case). It has been found that this parameter has a direct effect on the crystalline growth orientation of these films and that a new preferential orientation (100) appears at low r. On the other hand, SEM images show the formation of homogeneous nanocrystalline thin films with an average grain size ranged between 19 and 35 nm. Moreover, the ZnO thin films exhibit a high transparency in the visible region, and the measured transmittance is ranged from 85 to 97%. However, the change of ZnO film orientation has no significant effect on the direct bandgap energy which is closed to 3.30 eV.

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Section: Structural Studysupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Effect of Solvents and Stabilizer Molar Ratio on the Growth Orientation of Sol-Gel-Derived ZnO Thin Films

Bekkari

Jaber²,

Labrim

et al. 2019

International Journal of Photoenergy

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“…The fluorescence spectrum confirms that the type of emissions from the ZnO nanoparticles, whether UV (or) violet is affected by the time and temperature of the reaction. In addition, the violet and green bands confirm that the samples contain ZnO nanoparticles [30,[34][35].…”

Section: Fluorescence Spectra Of Zno Nanoparticlesmentioning

confidence: 78%

Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method

2018

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Influence of synthesis temperature and reaction time on structural and optical properties of ZnO nanoparticles synthesized by hydrothermal method was investigated using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), and UV-visible and fluorescence spectroscopy. The XRD pattern and HR-TEM images confirmed the presence of crystalline hexagonal wurtzite ZnO nanoparticles with average crystallite size in the range 30-40 nm. Their energy gap determined by fluorescence was found to depend on the synthesis temperature and reaction time with values in the range 2.90-3.78 eV. Thermal analysis, thermogravimetric (TG) and the differential scanning calorimetry (DSC) were used to study the thermal reactions and weight loss with heat of the prepared ZnO nanoparticles.

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“…Recently various synthesis techniques were utilized for fabrication of inorganic material nanoparticles such as thermal degradation method [8][9][10], hydrothermal method [11][12][13], sol-gel method [14][15][16], precipitation method [17][18][19], combustion synthesis [20][21][22], and microwave method [23][24][25]. Many inorganic oxides like zinc oxide, zirconium oxide, titanium oxide, stannic oxide and other oxides have considered as attractive photo-catalysts because of their high catalytic performance in the decomposition of organic materials like pesticides, dyes and detergents under sunlight and UV light irradiation [12,26,27].…”

Section: Introductionmentioning

confidence: 99%

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

Ali

Ahmed

Amin

et al. 2021

J Inorg Organomet Polym

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We are pleased to submit the attached original research article entitled "Auto-combustion fabrication and optical properties of zinc oxide nanoparticles for degradation of reactive red 195 and methyl orange dyes" for consideration for publication as a research article Journal of Inorganic and Organometallic Polymers and Materials.In this manuscript, zinc oxide nanoparticles were synthesized using an auto-combustion technique with fuels (tartaric acid and citric acid) according to the rule of the combustion method. the obtained zinc oxide nanoparticles were studied using various tools such XRD, DRS, TEM and FTIR.The results of XRD confirmed that the formation of the hexagonal structure of the synthesized zinc oxide after calcination at 500 o C. The extracted data from XRD and TEM techniques showed that the crystallite size of the fabricated zinc oxide nanoparticles determined to be 24-39 nm. The direct band gap, lattice parameters, unit cell volume (V), the dislocation density (D) and the Zn-O bond length (L) of the synthesized zinc oxide were determined. The values of the lattice parameters (a and c), the ratio (c/a), unit cell volume (V) and Zn-O bond length (L) were determined and found in the range of 3.2333-

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Influence of the sol gel synthesis parameters on the photoluminescence properties of ZnO nanoparticles

Cited by 63 publications

References 50 publications

Effect of Solvents and Stabilizer Molar Ratio on the Growth Orientation of Sol-Gel-Derived ZnO Thin Films

Effect of Solvents and Stabilizer Molar Ratio on the Growth Orientation of Sol-Gel-Derived ZnO Thin Films

Influence of reaction time and synthesis temperature on the physical properties of ZnO nanoparticles synthesized by the hydrothermal method

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

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