Investigation on the effect of Al concentration on the structural, optical and electrical properties of spin coated Al:ZnO thin films

Raghu, P.; Srinatha, N.; Naveen, C. S.; Mahesh, H.M.; Angadi, Basavaraj

doi:10.1016/j.jallcom.2016.09.290

Cited by 47 publications

(11 citation statements)

References 24 publications

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“…This is why the optical band gap gets enhanced after irradiation. A similar effect was found in the Al-doped ZnO in which an additional carrier concentration is gained by Al doping, whereas in our case, this energy band gap shift has been obtained due to gamma irradiation. Another possibility is due to the lattice parameter shrinkage after irradiation.…”

Section: Resultssupporting

confidence: 89%

Gamma Ray Irradiation Enhances the Linkage of Cotton Fabrics Coated with ZnO Nanoparticles

et al. 2020

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In this work, we aim to study zinc oxide (ZnO)-based functional materials over cotton fabrics and their effects after gamma ray exposure of 9 kGy. We found that the binding of the nanoparticles with cotton fabrics can be enhanced after irradiation. This could be due to the oxygen deficiency or defects created in the interface between ZnO and cotton fabrics after irradiation. Near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopy (XPS) were used to detect the oxygen inadequacies generated in the interior and at the surface of the ZnO nanoparticles after gamma ray exposure. XPS results showed that the binding energy of Zn shifts by 2 eV at 1.5 kGy and by 4 eV at 9 kGy. This huge shift of about 4 eV is completely different from other works due to the reaction that takes place on the interface between ZnO nanostructures and cotton fabrics after gamma ray irradiation. Overall, this work suggests that after gamma ray irradiation, there is an enhanced level of binding between the coated functional nanoparticles and cotton fabrics, which can be advantageous for the textile industries.

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Section: Resultssupporting

confidence: 89%

Gamma Ray Irradiation Enhances the Linkage of Cotton Fabrics Coated with ZnO Nanoparticles

et al. 2020

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“…Where P is a constant for direct transition, and hʋ photon energy: free electrons will occupy the lowest states of the conduction band, pushing the fermi level to move towards higher level in energy [19].…”

Section: Resultsmentioning

confidence: 99%

Study of Aluminum Doping Effect on Some Optical, Structural and Morphological Characteristics of Nanocrystalline Zinc Oxide Films

Mohammed¹,

Mansoor²,

Habeeb³

2020

DJPS

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Undoped and Aluminium (Al) doped ZnO thin films with different weight percentages (0, 2, 4, 6, 8%) were deposited on glass substrates using "sol-gel spin coating method". Optical, Crystal structural and surface morphological characteristics of all prepared samples have been studied in terms of their doping effects. The crystal structural analysis was done by X-ray diffraction, and the results showed that all prepared films have "polycrystalline hexagonal" type structure with preferred orientation along (002) for all films except for the percentage (4%) where its preferred orientation was (101). The Al doping leads to decrease the crystallite size of ZnO thin films. Other structural properties such as lattice constant, texture coefficient, dislocation density and number of crystalline per unit area for all prepared films have been calculated. (FE-SEM) images results showed that all prepared films were in the range of (10-100nm) scale nanostructure. Also, the values of average grain size decrease and the surfaces became more homogenous with increase of Al doping ratio. The optical results showed that the optical transmittance is >90%, while the optical energy gap increased with increase of Al doping ratio.

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“…Recent research on AZO films has converged on the understanding of the atomic and electronic structure, both theoretically [ 13 ] and experimentally. [ 19 ] Due to the complexity of the doping process associated with the physical and chemical properties of ZnO, several chemical elements such as Ag, [ 17 ] Al, [ 16 ] B, [ 20 ] Ga, [ 21 ] Sn, [ 22 ] and Ti [ 23 ] have been studied as degenerative agents of ZnO properties. Studies by Chan et al [ 23 ] analyzed thin films of AZO, gallium (GZO), and titanium (TZO) with different doping concentrations, produced by radio frequency (RF) magnetron.…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Properties of ZnO:Al Thin Films Produced by Magnetron Sputtering with Different Oxygen Flow: An Experimental and Ab Initio Study

Queiroz

Filho

Feitor

et al. 2020

Physica Status Solidi (a)

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This work addresses, in an experimental and theoretical way, the influence of different oxygen pressure values on the physical and electronic properties of thin conductive and transparent oxide films of Al‐doped ZnO, with different thicknesses. A series of characterization techniques, which include X‐ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), optical spectrophotometry, and Hall measurements are conducted. All films have a hexagonal wurtzite structure characteristic of ZnO, with preferential orientation along the plane (002) and transmittance values, in the visible range, greater than 80%. The increase in flow oxygen up to 25% provides an increase in the film's density resulting in a decrease in electrical resistivity from 9.58 × 10−3 Ω cm to 8.14 × 10−3 Ω cm. The ab initio calculations allow to observe the distortions in the microstructure of the films attributed to the presence of impurities and to obtain the values of the total and formation energies. The values of the Mulliken population and chemical bond length are notoriously influenced by the concentration of oxygen in the atmosphere. The displacement of the valence band (VB) and the Fermi level, together with the decrease in the gap energy, reinforce the influence of oxygen gas on the electronic structure of the films.

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Investigation on the effect of Al concentration on the structural, optical and electrical properties of spin coated Al:ZnO thin films

Cited by 47 publications

References 24 publications

Gamma Ray Irradiation Enhances the Linkage of Cotton Fabrics Coated with ZnO Nanoparticles

Gamma Ray Irradiation Enhances the Linkage of Cotton Fabrics Coated with ZnO Nanoparticles

Study of Aluminum Doping Effect on Some Optical, Structural and Morphological Characteristics of Nanocrystalline Zinc Oxide Films

Structural and Optical Properties of ZnO:Al Thin Films Produced by Magnetron Sputtering with Different Oxygen Flow: An Experimental and Ab Initio Study

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