Effect of Al concentrations on the electrodeposition and properties of transparent Al-doped ZnO thin films

Zinc oxide (ZnO) nanostructures were deposited under potentiostatic control on indium tin oxide coated glass substrate from an aqueous solution containing zinc nitrates. Voltammograms were recorded to determine the optimal potential region for the deposition of ZnO. The deposition was carried out at various concentrations of Zn ?2 and constant bath temperature (65°C). The nucleation and growth kinetics at the initial stages of ZnO studied by current transients indicated a 3D island growth (Volmer-Weber). It is characterized by an instantaneous nucleation mechanism followed by diffusion-limited growth. The Mott-Schottky measurements, the flat band potential and the donor density for the ZnO nanostructures were determined. The morphological, structural, and optical properties of the nanostructures have been investigated. Scanning electron microscopy images showed different sizes and morphologies of the nanostructures which depends on the concentrations of Zn ?2 . X-ray diffraction study confirms the wurtzite phase of the ZnO nanostructures with high crystallinity. UV-visible spectra showed a significant optical transmission (up to 90 %), which decreased with Zn 2? concentrations. The energy band gap values have been estimated to be in the range 3.36-3.54 eV.

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“…7). These E g values of ZnO nanostructures obtained by electrodeposition are similar to other reports [46].…”

Section: Optical Properties Of Zno Nanostructuressupporting

confidence: 91%

Effect of nitrate concentration on the electrochemical growth and properties of ZnO nanostructures

Mentar

Baka

Khelladi

et al. 2014

J Mater Sci: Mater Electron

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“…On the contrary, the chemical processes do not undergo these drawbacks and are capable of producing unconventional shapes and structures 9 . A wide variety of chemical methods have been reported in the literature such as chemical bath deposition (CBD) 10 , electrodeposition [11][12][13][14][15] , hydrothermal 16 , spray pyrolysis…”

Section: Introductionmentioning

confidence: 99%

Morphological, Structural and Optical Properties of ZnO Thin Films Deposited by Dip Coating Method

et al. 2016

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Zinc oxide (ZnO) thin films were deposited on glass substrat by dip coating technique. The effects of sol aging time on the deposition of ZnO films was studied by using the field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), and optical transmission techniques. The morphology of the films strongly depends on preparation route and deposition technique. It is noteworthy that films deposited from the freshly prepared solution feature indistinct characteristics; had relatively poor crystalline quality and low optical transmittance in the visible region. The increase in sol aging time resulted in a gradual improvement in crystallinity (in terms of peak sharpness and peak intensity) of the hexagonal phase for all diffraction peaks. Effect of sol aging on optical transparency is quite obvious through increased transmission with prolonged sol aging time. Interestingly, 72-168 h sol aging time was found to be optimal to achieve smooth surface morphology, good crystallinity and high optical transmittance which were attributed to an ideal stability of solution. These findings present a better-defined and more versatile procedure for production of clean ZnO sols of readily adjustable nanocrystalline size.

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“…However, the complexity of the nucleation and growth of ZnO on AZO substrate (see Fig. 4c) indicates a marked influence of both precursor concentration and buffer crystallites of the substrate [37].…”

Section: Electrodeposition Of Al-doped Zno Nras On Azo Substratementioning

confidence: 99%

Effect of AZO film as seeding substrate on the electrodeposition and properties of Al-doped ZnO nanorod arrays

Prună

Pullini

Busquets

2015

Ceramics International

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Effect of Al concentrations on the electrodeposition and properties of transparent Al-doped ZnO thin films

Cited by 44 publications

References 38 publications

Effect of nitrate concentration on the electrochemical growth and properties of ZnO nanostructures

Effect of nitrate concentration on the electrochemical growth and properties of ZnO nanostructures

Morphological, Structural and Optical Properties of ZnO Thin Films Deposited by Dip Coating Method

Effect of AZO film as seeding substrate on the electrodeposition and properties of Al-doped ZnO nanorod arrays

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