A comparative study on structural and optical properties of ZnO and Al-doped ZnO thin films obtained by ultrasonic spray method using different solvents

Gahtar, Abdelouahab; Rahal, Achour; Benhaoua, Boubaker; Benramache, Said

doi:10.1016/j.ijleo.2014.01.078

Cited by 57 publications

(17 citation statements)

References 29 publications

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“…Various techniques have been used to prepare the ZnO thin films. These techniques include the chemical vapor deposition [10], electrochemical deposition [11], spray pyrolysis [12][13][14], sol-gel method [15][16][17]. Among the techniques mentioned above, the sol-gel process has attracted a great attention due to its excellent homogeneity, low cost, easy control of doping, and chemical composition, good reproducibility, lower crystallization temperature and large-area coating capability with high adhesion on different types of substrates [18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Highly Textured Thin Films of Undoped and Ag-Doped ZnO

et al. 2019

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Undoped and Ag-doped ZnO thin films with different silver concentrations (0, 1, 3, and 7 wt%) were synthesized by sol-gel method and deposited onto glass substrate by dip-coating technique. Zinc acetate dehydrate and silver nitrate were used as starting materials. 2-Methoxyethanol and ethanolamine were used as solvent and stabilizer. Characterization by X-ray diffraction has revealed that the undoped and Ag-doped ZnO are polycrystalline, and have the wurtzite hexagonal structure with a preferred orientation along c-axis. The nanometric size (27-34 nm) of ZnO crystallites varies with the concentration of Ag. The surface morphology analysis, by atomic force microscopy and scanning electron microscopy, depicts a homogeneous dispersion of ZnO crystallites in the form of randomly spread wrinkles-like formation. The Raman spectroscopy confirms the Ag incorporation in the ZnO lattice. All films exhibit a transmittance greater than 75% in the visible region, and a sharp absorption band at 325 nm corresponding to the fundamental absorption edge. The room-temperature photoluminescence spectra of the prepared thin films display a strong ultraviolet band at 380 nm originated from excitons recombination, and four bands in the visible region at 430 nm (violet), 460 nm, 480 nm (blue) and 530 nm (green) from created defect levels in the band gap. These synthesized materials may be potential candidates in the manufacture of devices using short wavelengths.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Highly Textured Thin Films of Undoped and Ag-Doped ZnO

et al. 2019

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“…The advantages of Tin oxide can be modified as needed by providing additional elements (dopants) (Ikraman et al, 2017). Tin oxide is usually doped with indium (Ma et al, 2018), fluorine (Banyamin et al, 2014) and aluminum (Gahtar et al, 2014). Tin oxide thin films doped with Aluminum and Fluorine are known to affect the properties of Tin Oxide itself, including stabilizing Tin oxide particles and changing the energy band gap.…”

Section: Introductionmentioning

confidence: 99%

Growth of Tin Oxide Thin Film by Aluminum and Fluorine Doping Using Spin Coating Sol-Gel Techniques

Susilawati¹,

Doyan

Muliyadi

et al. 2020

jppipa, pendidikan ipa, fisika, biologi, kimia

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The growth of tin oxide thin film by Aluminum doping and Fluorine has been carried out with the sol-gel spin coating technique. The growth aims to determine the quality of the thin layer formed based on variations in doping aluminum and fluorine. The basic ingredients used were SnCl2.2H2O, while the doping materials used were Al (Aluminium) and F (Fluorine) with variations in dopant concentrations (0, 5, 10, 15, 20 and 25)%. The growth of a thin layer using measured glass (10x10x 3) mm as a substrate. The growth of thin films includes substrate preparation, sol-gel making, thin film making, and heating processes. The growth of thin layer was dripped on a glass substrate with sol-gel spin coating technique at 1 M sol concentration and treated with maturation for 24 hours. The next step is making a thin layer using a spin coater at a speed of 2000 rpm for 3 minutes. After that, the substrate is heated in an oven at 100°C for 60 minutes. The results showed that the transparency level of the tin oxide layer increases with increasing amounts of doping Aluminum and fluorine. Key words: Aluminum, Fluorine, Sol-gel, Spin Coating, Thin Film, Tin Oxide

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“…The band structure of any semiconductor is pivotal in determining its potential application. AZO was prepared by Gahtar et al [50], O'Brien et al [51] and Gao et al [52]. They all used zinc acetate dehydrate as precursor, and monoethanolamine was used as stabilizing agents by O'Brien et al [51] and Gao et al [52], while, Gahtar et al [50] used HCL to stabilize the solution.…”

Section: Structure Properties and Applications Of Zinc Oxide (Zno) Tmentioning

confidence: 99%

“…The aluminum doping was obtained from aluminum chloride, by Gahtar et al [50], aluminum nitrate by O'Brien et al [51] and aluminum chloride hexahydrate by Gao et al [52]. The solvents used were an equal volume of ethanol and methanol solution [50], isopropanol [51], and ethanol [52].…”

Section: Structure Properties and Applications Of Zinc Oxide (Zno) Tmentioning

confidence: 99%

Direct Writing of Aluminum Doped Zinc Oxide for Optoelectronic and Energy Device Applications

Abidakun¹

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Micro scale patterning of transparent conducting oxide (TCO) offers great promise in producing efficient and low cost devices. Most of the major patterning techniques are either complex, expensive, non-scalable, or involve the use of environmentally unfriendly chemicals. Therefore, patterning of Aluminum doped Zinc Oxide (AZO) via sol-gel route, combined with direct writing, in particular, nozzle-based robotic deposition, offers a relatively easy and efficient way to selectively deposit complex features in digitally precise locations, at low cost and without excessive use of harmful chemicals. However, the printing process involves the interplay of various parameters, which need to be properly related, in order to annex the inherent benefits in the manufacturing process. Hence, the focus of this work is to investigate the influence of the printing parameters, which are viscosity, nozzle size, extrusion pressure, dispensing height and writing speed on the properties of the patterned AZO feature on glass substrates. The properties of interest include geometry of deposited and sintered feature, morphology, microstructure and electrical conductivity. A dual, three factors, three levels factorial experiment was designed to determine the influence of the printing parameters on the feature geometry. The morphology and crystal structure of the sintered feature at various combinations of printing parameters were studied by scanning electron microscopy (SEM) and x-ray diffraction (XRD). Also, the electrical properties of sintered feature with and without ultraviolet (UV) light irradiation were determined in a metalsemiconductor-metal configuration using a semiconductor analyzer. It was found that the main effects and interactions among the printing parameters considered were significant in determining the spread and the profile of the deposited features at 95% confidence level. A link between the printing parameters and the morphology and crystal structure was established, providing the opportunity for tailoring the deposited film to desired end use, without altering the chemical composition or post processing treatment. The electrical property, which increased upon UV excitation, was also found to be comparable with those reported in the literature for conventionally sol-gel deposited AZO films. Given the achieved control of feature geometry and microstructure through alteration of printing parameters, and the electrical conductivity of the deposited patterns, this work provides a pathway to efficient, large area optoelectronic devices at low cost. iii ACKNOWLEDGEMENTS I would like to express my sincere gratitude to my advisor, Dr. Kostas Sierros for his guidance and support through course of this program, and for always being committed to helping me succeed. His in-depth knowledge of the subject field has help me grow professionally. My sincere appreciation goes to Dr. Samir Shoukry and Dr. Charter Stinespring for agreeing to serve in my committee. Their relentless support and timely response is highly appreciated. I tha...

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A comparative study on structural and optical properties of ZnO and Al-doped ZnO thin films obtained by ultrasonic spray method using different solvents

Cited by 57 publications

References 29 publications

Fabrication and Characterization of Highly Textured Thin Films of Undoped and Ag-Doped ZnO

Fabrication and Characterization of Highly Textured Thin Films of Undoped and Ag-Doped ZnO

Growth of Tin Oxide Thin Film by Aluminum and Fluorine Doping Using Spin Coating Sol-Gel Techniques

Direct Writing of Aluminum Doped Zinc Oxide for Optoelectronic and Energy Device Applications

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