(0 0 2)-oriented growth and morphologies of ZnO thin films prepared by sol-gel method

Guo, Dongyun; Ju, Yang; Fu, Ce; Zhang, Huang; Zhang, Lianmeng

doi:10.1515/msp-2016-0076

Cited by 8 publications

(6 citation statements)

References 23 publications

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“…One of the prevailing difficulties in processing highquality ZnO sol-gel films are malformed surface features such as cracks and rippling, so-called 2D nanostructures, and other morphological discontinuities, as shown in Figure 1. These ripples and other surface features have been observed by other studies [14][15][16], and with certain exceptions are generally considered a hinderance to semiconductive properties [17]. Throughout the course of our study, we frequently encountered these discontinuities, especially in silverdoped films.…”

Section: Introductionsupporting

confidence: 68%

Surface wetting of silver-doped sol–gel ZnO films

Heintzkill

Flannagan-Morris

Abu‐Zahra

2019

Surface Engineering

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Zinc Oxide thin films were fabricated by sol-gel process and treated with various organic solvents between deposition layers. Undoped and silver-doped samples were further subjected to different drying and annealing temperatures between coats. Effects on surface morphology, preferred crystallographic orientation, crystallite size, and change in calculated optical band gap were all examined factorially by dopant, annealing, and wetting/treatment. Nearly every wetting solvent was found to improve preferential orientation and crystallinity, although significant differences were observed between doped and undoped, interstitially annealed samples, and those not annealed between layers. Direct causal correlation is not examined herein, although some inference can be made as to the effects of wetting solvents' intermolecular energy, polarity, viscosity, surface energy, and other intrinsic properties. Significant improvements in film properties suggest that further research into wetting-treatment methods is warranted, in terms of electronic and semiconductive character, and deviceimplementation.

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Section: Introductionsupporting

confidence: 68%

Surface wetting of silver-doped sol–gel ZnO films

Heintzkill

Flannagan-Morris

Abu‐Zahra

2019

Surface Engineering

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“… 78 C and  64.7 C respectively. Since drying temperature was  200 C, therefore solvent with lower boiling temperature abruptly evaporates which produce stresses (wrinkles) in seed layer [22]. Also, the substrate temperature increases during drying process which forces the solvent to evaporate more rapidly and produce stresses between seed layer and substrate.…”

Section: Results and Discussion Xrd Analysismentioning

confidence: 99%

“…Boiling temperature of solvent directly affects the morphology of ZnO thin film. For smooth ZnO layers, the solvent having higher boiling temperature are favorable [22]. The drying temperature introduces residual stresses in seed layer which ultimately affects the optical properties and controlled growth of doped ZnO nanorods.…”

Section: Introductionmentioning

confidence: 99%

Comparative study for seed layer solvent effects on structural and optical properties of MgZnO thin films deposited by chemical bath deposition technique

Baig

Asif

Ashraf

et al. 2020

Mater. Res. Express

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C-axis oriented Magnesium doped Zinc Oxide (MgZnO) thin films are promising candidates for variety of applications especially optoelectronic devices. In this work, the effects of seeding solvents on structural and optical properties of MgZnO films were analyzed. The comparison was performed by varying the seed layer solvent i.e. 2-Methoxyethanol, 2-Propanol, Ethanol and Methanol. MgZnO thin films were synthesized on different seed layered glass substrates using Chemical Bath Deposition (CBD) method. The XRD results revealed the hexagonal wurtzite structure for all samples. However, the film with seed layer 2-Methoxyethanol solvent had preferred c-axis orientation and better crystallanity. For 2-Methoxyethanol solvent based seed layer: the morphological study showed wrinkled free, unfractured and highly aligned MgZnO nanorods grown perpendicular to the substrate. Energy dispersive x-ray (EDS) spectroscopy confirmed the presence of magnesium in ZnO film. Highest average transmittance of 80% and band gap value of 3.3 eV was recorded through UV-vis spectroscopy. The optical constants (refractive index and extinction coefficient) were determined by reflectance and absorbance data. Furthermore complex dielectric constant and energy loss functions were estimated.

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“…Monoethanolamine is a common stabilizer, which is used for the stabilization of Zn solution in sol-gel process. Acetylacetone, diethanolamine, tetramethylammonium hydroxide, and ethylenediamine tetraacetates are also used as stabilizers [27,35]. A stabilizing agent is critical in sol-gel reactions to avoid both the premature precipitations and inhibiting the rapid conversion of the sol into a gel.…”

Section: Processingmentioning

confidence: 99%

Sol-Gel-Derived Doped ZnO Thin Films: Processing, Properties, and Applications

Mahmood¹,

Akhtar²

2017

Recent Applications in Sol-Gel Synthesis

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Sol-gel-derived zinc oxide (ZnO)-based materials with an improved microstructure are consumed in electronics and electrical frameworks owing to their crystal structure dependent properties, which can be exploited for optical, electrical, and photocatalytic applications. Despite research articles published each year on the strategies to improve the optoelectronic properties of ZnO, the topic is still actively pursued in literature. This chapter provides an insight into the recent developments for the sol-gel-derived processing of the pure and doped ZnO thin films. It also highlights the challenges and opportunities surrounding the processing of these devices. The recent developments in the synthesis of pure, doped ZnO, and corresponding applications of these films will be discussed in detail. Consequently, the aim of this chapter is to provide an overview of the novel developmental strategies to improve ZnO-based thin films by a sol-gel route with enhanced optical properties for practical applications ranging from optical and electrical circuits to sensing.

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(0 0 2)-oriented growth and morphologies of ZnO thin films prepared by sol-gel method

Cited by 8 publications

References 23 publications

Surface wetting of silver-doped sol–gel ZnO films

Surface wetting of silver-doped sol–gel ZnO films

Comparative study for seed layer solvent effects on structural and optical properties of MgZnO thin films deposited by chemical bath deposition technique

Sol-Gel-Derived Doped ZnO Thin Films: Processing, Properties, and Applications

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