Effect of the Substrate Movement on the Optical Properties of ZnO Thin Films Deposited by Ultrasonic Spray Pyrolysis

Gungor, Ebru; Güngör, Tayyar

doi:10.1155/2012/594971

Cited by 13 publications

(10 citation statements)

References 15 publications

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“…Nozzle (100 kHz oscillator frequency) used in this study was in a downward vertical configuration. A more detailed description of the USP system were reported in previous papers [7]. X-ray diffraction (XRD) patterns were collected with a D-Max X-ray diffractometer (Rigaku International Corp. Japan) with CuKα1 (λ=1.5405Ǻ) to obtain the structural information of the films.…”

Section: Methodsmentioning

confidence: 99%

INFLUENCE OF ALUMINUM CONCENTRATION ON THE ELECTRICAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS

Gungor

Güngör

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Al:ZnO (AZO) thin films having with different Al concentrations were deposited on glass substrates by a sol-gel technique. The effects of Al doping on the structural, optical, and electrical properties of Al:ZnO were investigated using with XRD, optical transmittance, and sheet resistance measurements. The concentration of zinc acetate was 0.1 M. Al content in the starting solution was varied from 0 to 20% as the molarity range. Optical transmittance spectra of the films in the form of Film/Glass were used to determine the film thickness and optical band gaps. The optical transmissions of Al:ZnO thin films were higher than 80% in the visible and near infrared region. The optical band gaps of Al:ZnO films decrease with increase of Al content. In order to obtain the average sheet resistance of the films the current and voltage through the probes have been measured for five different position by four-point probe method. The results showed that the sheet resistances of Al:ZnO thin films increased with the Al concentration. Considering the film thickness and geometric factor, the electrical resistivity values were computed. It was observed that the sheet resistance of AZO films up to 10% molarity of Al in the starting solution increased.

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Section: Methodsmentioning

confidence: 99%

INFLUENCE OF ALUMINUM CONCENTRATION ON THE ELECTRICAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS

Gungor

Güngör

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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“…ZnO films have been prepared by various methods, such as pulsed laser deposition (PLD) [5], metal organic chemical vapor deposition (MOCVD) [6], physical vapor deposition [7], spray pyrolysis [8], and sol-gel technique [9]. Compared with others, sol-gel technique is simple, of low cost, and an advantage of large area deposition.…”

Section: Introductionmentioning

confidence: 99%

The Variation of Optical Band Gap for ZnO:In Films Prepared by Sol-Gel Technique

Tang

Hua

Zhang

2013

Advances in Materials Science and Engineering

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ZnO:In films with different concentrations (0–5 at.%) are successfully synthesized on quartz substrates using sol-gel technique. The structure, morphology, and optical properties of ZnO:In films are investigated by X-ray diffraction, atomic force microscopy, and UV-visible spectrophotometer. It is found that all the films with columnar structural morphology grow along the preferred [001] orientation and the incorporation of indium can improve the crystallinity of ZnO films. The transmittance of the films is about 80% in the visible range. A change of the optical absorption edge from blue shift to red shift is observed for ZnO:In films as the doping concentration increases, which means that the optical band gap first increases and then decreases. The blue shift is due to the Burstein-Moss effect. The sharp jump of the absorption edge from blue-shift to red shift is ascribe to the band gap narrowing caused by the merging of the donor and conduction bands of ZnO:In at high doping concentration.

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“…In the sol-gel process, the precursor solution can be coated on the substrate by dip coating, spray pyrolysis, and spin coating techniques. In recent years, ZnO, prepared by various deposition methods such as reactive evaporation [3], RF sputtering [4], chemical vapor deposition [5], ultrasonic spray pyrolysis [6][7][8], sol-gel method [9], and dip coating method [10], have found very different application areas for optoelectronics and sensor technology applications. In addition to changes of the optical constants, the change in the band gap may be advantageous in the technological use of the films.…”

Section: Introductionmentioning

confidence: 99%

OPTICAL PROPERTIES OF Al:ZnO THIN FILM DEPOSITED BY DIFFERENT SOL-GEL TECHNIQUES: ULTRASONIC SPRAY PYROLYSIS AND DIP-COATING

Gungor

Güngör

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Undoped and Al-doped ZnO polycrystalline thin films have been fabricated on glass substrates by using a computer-controlled dip coating (DC) and ultrasonic spray pyrolysis (USP) systems. The film deposition parameters of DC process were optimized for the samples. In this technique, the substrate was exposed to temperature gradient using a tube furnace. In the study, the other solvent-based technique was conventional USP. The zinc salt and Al salt concentrations in the solution were kept constant as 0.1 M and 2% of Zn salt's molarity, respectively. The optical properties were compared for the films deposited two different techniques. The optical transmission of Al:ZnO/Glass/Al:ZnO sample dip coated and the optical transmission of Al:ZnO/Glass sample ultrasonically sprayed were determined higher than 80% in the visible and near infrared region. Experimental optical transmittance spectra of the films in the forms of FilmA/Glass/FilmA and FilmA/Glass were used to determine the optical constants. It was observed that the optical band gaps of Al doped ZnO films onto glass substrate were increased with increase of Al content and the absorption edge shifted to the shorter wavelength (blue shift) compared with the undoped ZnO thin film.

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Effect of the Substrate Movement on the Optical Properties of ZnO Thin Films Deposited by Ultrasonic Spray Pyrolysis

Cited by 13 publications

References 15 publications

INFLUENCE OF ALUMINUM CONCENTRATION ON THE ELECTRICAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS

INFLUENCE OF ALUMINUM CONCENTRATION ON THE ELECTRICAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS

The Variation of Optical Band Gap for ZnO:In Films Prepared by Sol-Gel Technique

OPTICAL PROPERTIES OF Al:ZnO THIN FILM DEPOSITED BY DIFFERENT SOL-GEL TECHNIQUES: ULTRASONIC SPRAY PYROLYSIS AND DIP-COATING

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