Sol–gel derived zinc oxide films: Effect of deposition parameters on structure, microstructure and photoluminescence properties

Aksoy, Seval; Çağlar, Yasemin; Ilıcan, Saliha; Çağlar, Müjdat

doi:10.1016/j.spmi.2011.08.008

Cited by 21 publications

(10 citation statements)

References 30 publications

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“…The effects of sol concentration have been reported with a general agreement on the formation of larger grains and varying effects on crystal orientation depending on the parameters and recipe used [12,[24][25][26][27][28][29]. The effects of synthesis temperature have been less reported and seem to affect the crystallite sizes [33].…”

Section: Discussionmentioning

confidence: 99%

“…Our interest in this work will be focused on preparation parameters of the sol, namely concentration and synthesis temperature, which appear to be interesting parameters to modify the layers. Sol concentration is indeed in direct relation with structural state, thickness, roughness and grain sizes [12,[24][25][26][27][28][29]. Synthesis temperature is likened to ageing of solution, which also has influence on thickness, roughness, grain sizes and orientation [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Correlated effects of preparation parameters and thickness on morphology and optical properties of ZnO very thin films

Gilliot

Hadjadj

2015

Journal of Crystal Growth

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlated effects of preparation parameters and thickness on morphology and optical properties of ZnO very thin films

Gilliot

Hadjadj

2015

Journal of Crystal Growth

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“…It is known that thin films properties and morphology can be affected by postprocessing annealing temperature, which has been the subject of several works. In the case of the sol-gel spin coating technique, the morphology and properties of the film are also impacted by processing parameters such as the chelating agent [36,37], the zinc salt concentration [38][39][40], the solvent [41][42][43][44][45], the rotation speed [46][47][48][49][50][51][52][53][54][55][56][57] and the nature of the substrate [58][59][60][61][62][63]. In the present study, spin coating, which is usually devoted to the spreading of viscous solutions, is used in an uncommon configuration of fluid liquid deposition, giving rise to very thin films (<100 nm) with peculiar nano-granular morphologies.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Very Thin Zinc Oxide Films by Liquid Deposition Process: Review of Key Processing Parameters

et al. 2022

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We used sol-gel and spin-coating in the original configuration of a liquid deposition process to synthesize particularly thin ZnO films (<100 nm) with nano-granular morphology, high grain orientation and variable optical properties. The concentration of the zinc salt, the concentration of the chelating agent, the nature of the solvent and the substrate material have been identified as key parameters that determine the microstructure of the deposited layer and thus its final properties. The thorough and practical examination of the effects of the synthesis parameters evidenced a three-step growth mechanism for these ZnO thin films: (i) a reaction of precursors, (ii) a formation of nuclei, and (iii) a coalescence of nanoparticles under thermal annealing. The growth of these very thin films is thus conditioned by the interaction between the liquid phase and the substrate especially during the initial steps of the spin coating process. Such thin ZnO films with such nano-granular morphology may be of great interest in various applications, especially those requiring a large active surface area.

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“…As a result of these fascinating properties, ZnO is very suitable for use in many applications, such as optoelectronic devices [2], photocatalysis [3], solar cells [4], UV fabric protectors [5] and gas sensing devices [6]. Many workers have already fabricated ZnO films using various techniques, including spray pyrolysis [7], reactive magnetron sputtering [8,9], chemical vapor deposition (CVD) [10], sol-gel [11] molecular beam epitaxy [12], and pulsed laser deposition [13,14]. Recently, a lot of researchers increase the potential of using ZnO by doping it with transition metals like Fe, Mn, Co, Ni and Cu [15].…”

Section: -Introductionmentioning

confidence: 99%

Effect of Cu Incorporation on Optoelectronic Properties of e-Beam Evaporated ZnO thin Films by Ellipsometric Investigations

Ali¹,

Moustafa²,

Amer³

et al. 2021

Preprint

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Electron beam deposition technique has been used to deposit a series of Zn1-xCuxO nanocrystalline thin film on silica substrate with a variety of Cu concentrations. The microstructural, surface morphology and spectroscopic ellipsometry (SE) were used to examine the physical properties of the deposited films. The nanocrystalline nature of the Zn1-xCuxO (0.0≤x≤0.20) thin film has been confirmed by surface morphology studies. The XRD spectrum of the Zn1-xCuxO nanocrystalline film showed a hexagonal wurtzite type structure, and no extra phase was detected. Our results show that as the Cu content increases, the direct optical energy gap Eg decreases without any sign of solubility limit up to x≤0.2. The decrease in Eg can be attributed to the sp-d exchange coupling. In addition, exploring the spectral behavior of the refractive index dispersion from SE of the Cu-doped ZnO shows that as the Cu dopant increments; the refractive index of the deposited film enhances. Further, understand the refractive index dispersion of the deposited film has been performed using a single oscillator model proposed by Wemple-DiDomenico (WDD). Our calculations show that as the Cu concentration increases, the values of oscillator energy Eo decreases however, the dispersion energy Ed increases. As a result, the variation of the optical energy band gap and the tunability of the dispersive oscillator parameters values Eo, Ed, n0, e0, M-1 and M-3 with the increase of the Cu doping level confirm that Cu doped ZnO films are a good candidate for optoelectronic device applications.

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Sol–gel derived zinc oxide films: Effect of deposition parameters on structure, microstructure and photoluminescence properties

Cited by 21 publications

References 30 publications

Correlated effects of preparation parameters and thickness on morphology and optical properties of ZnO very thin films

Correlated effects of preparation parameters and thickness on morphology and optical properties of ZnO very thin films

Preparation of Very Thin Zinc Oxide Films by Liquid Deposition Process: Review of Key Processing Parameters

Effect of Cu Incorporation on Optoelectronic Properties of e-Beam Evaporated ZnO thin Films by Ellipsometric Investigations

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