Bonding and stoichiometry in low-energy radio frequency magnetron sputtered ZnO thin films on flexible substrate

Iheomamere, Chukwudi E.; Arnold, Corey L.; Rathod, Urmilaben P.; Omotosho, Khalil D.; Voevodin, Andrey A.; Shepherd, Nigel D.

doi:10.1016/j.vacuum.2020.109869

Cited by 11 publications

(1 citation statement)

References 40 publications

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“…The non-toxicity and abundance on earth of this compound make it an ideal candidate in several areas [23][24][25][26]. ZnO thin films have been synthesised by different techniques [27], such as CVD (chemical vapor deposition) [28,29], Spray pyrolysis [30][31][32], Sol-Gel [5,[33][34][35], and Radio frequency magnetron sputtering [36,37]. The SILAR technique, known as successive ionic layer adsorption and reaction, has attracted attention from researchers due to its simple process and cost-effectiveness [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Effect of film thickness on the electrical and the photocatalytic properties of ZnO nanorods grown by SILAR technique

Yousra,

Guettaf Temam,

Saâd

et al. 2023

Phys. Scr.

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In this work, Zinc oxide (ZnO) thin films were synthesised by the successive ionic layer adsorption and reaction (SILAR) technique at various number of cycles (10–50 cycles). The effect of film thickness on the structural properties, surface morphology, optical and electrical properties, and sunlight assisted photocatalytic activities through photocatalytic degradation of Methylene Blue (MB) dye of ZnO thin films were studied. The energy dispersive x-rays (EDX) analysis confirmed the presence Zn and O elements. The x-rays diffraction (XRD) pattern showed the polycrystalline nature of ZnO thin films and the crystallite size increases with film thickness. The SEM images showed that a greater film thickness resulted in the growth of hexagonal nanorods arrays. Atomic force microscopy (AFM) images revealed that the surface roughness increases with film thickness yielding in an enhanced specific surface area. The UV—visible transmission spectra showed that increasing film thickness results in band gap expansion from 3.15 eV to 3.31 eV together with a reduction in optical transmittance. The estimated sheet resistance and resistivity were found to be in the range of 1.34–7.1 Ω sq−1 and 0.09–2.12 ×10–1 Ω.cm. The photocatalytic studies reveal that increasing film thickness leads to an improved photocatalytic efficiency of ZnO films. The enhanced photocatalytic activity of ZnO films is due to the increased surface area and low recombination rate of carriers charges (e−/h+), resulting from band gap expansion.

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Section: Introductionmentioning

confidence: 99%

Effect of film thickness on the electrical and the photocatalytic properties of ZnO nanorods grown by SILAR technique

Yousra,

Guettaf Temam,

Saâd

et al. 2023

Phys. Scr.

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Fabrication and characterization of ZnO:Sb/n-ZnO homojunctions

et al. 2021

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Antimony doped ZnO layers have been grown by metal-organic vapor phase epitaxy on sapphire and ZnO substrates at high temperature (950°C) and low-pressure conditions (50 torr).Nitrous oxide and diethyl-zinc have been used as oxygen and zinc precursors, respectively. The incorporation of antimony has been obtained from the decomposition of triethyl-antimony doping molecules added in the gas phase. Sb concentrations were measured from 8.10 18 to 10 19 at /cm -3 using secondary ion mass spectroscopy. Our results suggest the formation of acceptor dopantdefect complexes, such as the SbZn-2VZn. Low temperature photoluminescence spectra of Sbdoped layers exhibit donor-acceptor pair transitions at 3.253 eV. Unlike Raman spectra of nitrogen doped ZnO layers which show several local vibrational modes related to nitrogen incorporation, these modes which are absent in the antimony-doped ZnO layers. n-ZnO/p-ZnO:Sb homojunction diodes on ZnO substrate have been successfully elaborated. The current-voltage characteristics of the device exhibit a rectifying behaviour with a turn-on voltage of 3V.

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Characterization of RF magnetron-sputtered a-BOxNy/ZnO MIS structures for transparent electronics

Iheomamere

Arnold

Summers

et al. 2021

J Mater Sci: Mater Electron

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Bonding and stoichiometry in low-energy radio frequency magnetron sputtered ZnO thin films on flexible substrate

Cited by 11 publications

References 40 publications

Effect of film thickness on the electrical and the photocatalytic properties of ZnO nanorods grown by SILAR technique

Effect of film thickness on the electrical and the photocatalytic properties of ZnO nanorods grown by SILAR technique

Fabrication and characterization of ZnO:Sb/n-ZnO homojunctions

Characterization of RF magnetron-sputtered a-BOxNy/ZnO MIS structures for transparent electronics

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