Improved optoelectronic performance of sol–gel derived ZnO nanostructured thin films

Khan, Ziaul Raza; Alshammari, Abdullah S.; Bouzidi, M.; Shkir, Mohd.; Shukla, D. K.

doi:10.1016/j.inoche.2021.108812

Cited by 17 publications

(3 citation statements)

References 59 publications

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“…Table III gives the information on structural properties of samples, including FWHM, the average crystallite size D, dislocation density δ, and lattice constants a and c of the particles obtained according to the XRD spectra. It should be noted that all the results obtained from our samples agree with the values reported in the literature [46,47]. Increasing the deposition times led to an increase in the average crystallite size, which changed from approximately 21 nm to 32 nm for deposition times of 1 min and 9 min, respectively.…”

Section: Resultssupporting

confidence: 90%

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Effect of deposition time on properties of the ZnO by USD Method

Madaoui,

Azibi,

Djabrouhou

et al. 2024

Rev. Mex. Fís.

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This investigation aims to improve the properties of 304 L stainless steel (SS) substrates for use in corrosion, mechanical, and biomedical applications by depositing ZnO thin films. The ultrasonic spraying technique was used to prepare ZnO thin films with depositional times of 1, 4, and 9 minutes. XRD and Raman studied the surface characteristics of ZnO samples. XRD analysis revealed a hexagonal structure with an average crystallite size of 22 nm for ZnO. Indentation nano measurements indicated an increase in the hardness of the films examined. To determine the type of conductivity and estimate the charge carrier density, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and Mott-Schottky analysis were performed. The thin film deposited for 9 minutes was found to be the most effective in improving corrosion resistance.

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Section: Resultssupporting

confidence: 90%

“…It is clear that, with increasing spray time of the deposited ZnO films the characteristic peaks' intensity of the wurtzite phase is progressively enhanced which reflects the amelioration of both film crystallinity and crystallite size. Similar behavior was reported in the literature for ZnO films [51][52][53][54].…”

Section: Resultssupporting

confidence: 90%

Effect of deposition time on properties of the ZnO by USD Method

Madaoui,

Azibi,

Djabrouhou

et al. 2024

Rev. Mex. Fís.

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“…Zinc oxide thin films have been prepared by various methods, such as nebulizer spray method [5][6][7], chemical vapor deposition [8,9], chemical bath deposition [10,11], sol-gel [12,13], thermal evaporation [14,15], sputtering [16,17] and pulsed laser deposition [18,19] have been deposited for the prodcution of ZnO films. Nebulizer spray pyrolysis techniques has received a little bit of more advantages due to their better homogeneity, stoichiometry control, low cost effectiveness, low processing temperature, simplicity and easier deposition of large area films, and compared to other methods, which allow the possibility of prepared films with the required properties for various applications.…”

Section: Introductionmentioning

confidence: 99%

Low-cost nebulizer spray deposited conduction mechanism of thin film ZnO nanoparticles

Amudhavalli¹,

Mariappan²,

Prasath³

2023

JOR

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The Zinc Oxide (ZnO) thin films have been deposited on glass substrate at different temperature from 300 to 500 o C by nebulizer spray pyrolysis technique. The prepared films were characterized by X-Ray diffraction (XRD), High resolution scanning electron microscope (HRSEM), Energy dispersive analysis by X-rays (EDAX), Photoluminescence (PL), UV-Vis-NIR spectrometer and impedance spectroscopy, respectively. The XRD confirms that the films are polycrystalline in nature with hexagonal wurtzite crystal structure with (002) plane as preferential orientation. The various parameters such as crystallite size, micro strain, and dislocation density were calculated from X-ray diffraction. HR-SEM images show smooth, tiny grains and dense morphology. The PL studies exhibits two emission peaks one at 389 nm corresponding to band gap excitonic emission and another located at 490 nm due to the presence of singly ionized oxygen vacancies. The UV-Vis-NIR spectrometer confirms the possibility of good transparent ZnO films with an average transmission of about ~85-95% in the visible region and optical band gap shifted from 3.37 eV to 3.2 eV with increase in temperature and which is supported by PL study. The semiconductor bahaviour and activation energy of these films have been confirmed by impedance spectroscopy measurements.

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