Effect of zinc doping on the structure and optical properties of iron oxide nanostructured films prepared by spray pyrolysis technique

<span>This paper presents the physical and optical properties of AZO thin films on Teflon substrate at low deposition temperature by spray pyrolysis. In this study, the effect of different process parameters such as spray time and substrate to nozzle distance on the physical and optical characteristic of aluminium doped zinc oxide (AZO) deposited on Teflon substrates was investigated. The AZO thin films were successfully deposited onto Teflon substrate by spray pyrolysis technique at low deposition temperature. The physical analysis by X-ray diffraction (XRD) shows that the deposited Teflon substrate films have a preferred orientation along the direction (100) and (101). Optical measurements were conducted using Jasco/V-670 Ex Uv-Vis-NIR Spectrophotometer model to confirms that in visible ray it is possible to get good reflectance of AZO films with a reflection of 80%. The values of band gaps Eg were calculated from the spectra of UV-Visible reflectance that were vary between 3.06 and 3.14 eV. </span>

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Structural and Optical Properties of Cobalt-Doped Zinc Oxide Thin Films Prepared By Spray Pyrolysis Technique

Baghdad Science Journal ◽

10.21123/bsj.7.1.69-75 ◽

2010 ◽

Vol 7 (1) ◽

pp. 69-75

Author(s):

Baghdad Science Journal

Keyword(s):

Thin Films ◽

Zinc Oxide ◽

Optical Properties ◽

Spray Pyrolysis ◽

Spray Pyrolysis Technique ◽

Texture Coefficient ◽

Hexagonal Structure ◽

Structural And Optical Properties ◽

Lattice Constants ◽

Glass Substrates

Undoped and Co-doped zinc oxide (CZO) thin films have been prepared by spray pyrolysis technique using solution of zinc acetate and cobalt chloride. The effect of Co dopants on structural and optical properties has been investigated. The films were found to exhibit maximum transmittance (~90%) and low absorbance. The structural properties of the deposited films were examined by x-ray diffraction (XRD). These films, deposited on glass substrates at (400? C), have a polycrystalline texture with a wurtzite hexagonal structure, and the grain size was decreased with increasing Co concentration, and no change was observed in lattice constants while the optical band gap decreased from (3.18-3.02) eV for direct allowed transition. Other parameters such as Texture Coefficient (Tc), dislocation density (?) and number of crystals (M) were also calculated .

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A Study of the Structural and Optical Properties of SnS:F prepared by chemical spray pyrolysis technique

Baghdad Science Journal ◽

10.21123/bsj.11.2.518-526 ◽

2014 ◽

Vol 11 (2) ◽

pp. 518-526

Author(s):

Baghdad Science Journal

Keyword(s):

Optical Properties ◽

Spray Pyrolysis ◽

Energy Gap ◽

Spray Pyrolysis Technique ◽

Chemical Spray Pyrolysis ◽

Structural And Optical Properties ◽

Optical Energy Gap ◽

Optical Energy ◽

Chemical Spray Pyrolysis Technique ◽

Chemical Spray

Thin films of pure tin mono-sulfide SnS and tin mono-sulfide for (1,2,3,4)% fluorine SnS:F with Thicknesses of (0.85 ±0.05) ?m and (0.45±0.05) ?m respectively were prepared by chemical spray pyrolysis technique. the effect of doping of F on structural and optical properties has been studied. X-Ray diffraction analysis showed that the prepared films were polycrystalline with orthorhombic structure. It was found that doping increased the intensity of diffraction peaks. Optical properties of all samples were studied by recording the absorption and transmission spectrum in range of wave lengths (300-900) nm. The optical energy gap for direct forbidden transition and indirect allowed transition were evaluated It is found that for doping less than 2% the optical energy gap increases as the percentage of doping increases in the samples while for doping more than 2% the values of the optical energy gap decreases as the percentage of doping increases.

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Annealing Effect on Some Optical Properties of Cr2O3 Thin Films Prepared by Spray Pyrolysis Technique

Baghdad Science Journal ◽

10.21123/bsj.8.2.561-565 ◽

2011 ◽

Vol 8 (2) ◽

pp. 561-565

Author(s):

Baghdad Science Journal

Keyword(s):

Thin Films ◽

Dielectric Constant ◽

Refractive Index ◽

Optical Properties ◽

Absorption Coefficient ◽

Spray Pyrolysis ◽

Annealing Temperature ◽

Spray Pyrolysis Technique ◽

Annealing Effect ◽

Before And After

Cr2O3 thin films have been prepared by spray pyrolysis on a glass substrate. Absorbance and transmittance spectra were recorded in the wavelength range (300-900) nm before and after annealing. The effects of annealing temperature on absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constant and optical conductivity were expected. It was found that all these parameters increase as the annealing temperature increased to 550°C.

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