Influence of Gamma Radiation on Structural and Optical Properties of Fe2O3 Thin Films Prepared by Chemical Spray Technique

2016 ◽  
Vol 63 ◽  
pp. 22-28 ◽  
Author(s):  
Mahdi M. Mutter ◽  
Habiba Kadhum Atty ◽  
Areej Adnan Hateef
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Gamma Radiation ◽  
Energy Gap ◽  
Transmission Spectra ◽  
Structural And Optical Properties ◽  
Xrd Pattern ◽  
Chemical Spray ◽  
Spray Technique

The purpose of this research is studying the effect of gamma radiation on the structural and optical properties of iron oxide Fe2O3thin films. The technique used for prepared the thin films was thermal chemical spray. The effect of Co60irradiation on the structural and optical properties of the thin films was investigated. The crystal structure were studied by XRD pattern. The surface tested from crack and defect was looke by used microscope image. The absorption and transmission spectra by used UV/VIS for the as deposited and irradiated thin films. The energy gap and absorption coefficient were studied. It's found that the energy gap for the un-irradiated sample was 2.3 eV and than after exposed to gamma radiation at (25,50,75,100 and 125) Gy the energy gap decreased and above 5o Gy was increasing. The absorption coefficient increased until (12x104) cm-1at 50 Gy and than was decreasing to (2x104) cm-1at 125 Gy. The effect of radiation on the structural and optical properties was positive at the levels of irradiation used.

scholarly journals Effect of Manganese Contain on the Optical Properties of CuO Thin Films

2016 ◽  
Vol 65 ◽  
pp. 37-42
Author(s):  
Wasmaa Abdulsattar Jabbar
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Copper Oxide ◽  
Extinction Coefficient ◽  
Energy Gap ◽  
Chemical Spray Pyrolysis ◽  
Chemical Spray ◽  
Uv Visible

Copper oxide prepared with various contains of Manganese by chemical spray pyrolysis. Some optical properties are studied from recording the absorption spectra via UV-Visible spectrophotometer in the range of 460-900 nm. The absorbance increased with increasing Mn-contain in the CuO thin films, and the absorption coefficient. Extinction coefficient and refractive index are decreased with increasing Mn-contain in the CuO thin films, also the energy gap shifted from 2 eV to 1.91 eV after 4%Mn additive.

scholarly journals Deposition Time induced Structural and Optical Properties of Lead Tin Sulphide Thin Films

2021 ◽  
pp. 455-458
Author(s):  
J. Damisa ◽  
J. O. Emegha ◽  
I. L. Ikhioya
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Tin Oxide ◽  
Deposition Time ◽  
Deposition Process ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Prepared Material

Lead tin sulphide (Pb-Sn-S) thin films (TFs) were deposited on fluorine-doped tin oxide (FTO) substrates via the electrochemical deposition process using lead (II) nitrate [Pb(NO3)2], tin (II) chloride dehydrate [SnCl2.2H2O] and thiacetamide [C2H5NS] precursors as sources of lead (Pb), tin (Sn) and sulphur (S). The solution of all the compounds was harmonized with a stirrer (magnetic) at 300k. In this study, we reported on the improvements in the properties (structural and optical) of Pb-Sn-S TFs by varying the deposition time. We observed from X-ray diffractometer (XRD) that the prepared material is polycrystalline in nature. UV-Vis measurements were done for the optical characterizations and the band gap values were seen to be increasing from 1.52 to 1.54 eV with deposition time. In addition to this, the absorption coefficient and refractive index were also estimated and discussed.

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

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.

scholarly journals optical proprties of poly crystaline CdS thin films

2005 ◽  
Vol 2 (2) ◽  
pp. 231-235
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Energy Gap ◽  
Glass Temperature ◽  
Calculated Energy ◽  
Cds Thin Films ◽  
Temperature Preparation

Studied the optical properties of the membranes CdS thin containing different ratios of ions cadmium to sulfur attended models manner spraying chemical gases on the rules of the glass temperature preparation (350c) were calculated energy gap allowed direct these membranes as observed decrease in the value of the energy gap at reducing the proportion ofsulfur ions as absorption coefficient was calculated

EFFECT OF SUBSTRATE TEMPERATURE ON THE STRUCTURAL AND OPTICAL PROPERTIES OF NiTsPc THIN FILMS

2019 ◽  
Vol 27 (03) ◽  
pp. 1950124 ◽  
Author(s):  
MOHAMMED YARUB HANI ◽  
ADDNAN H. AL-AARAJIY ◽  
AHMED M. ABDUL-LETTIF
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Optical Properties ◽  
Substrate Temperature ◽  
Energy Gap ◽  
Chemical Spray Pyrolysis ◽  
Structural And Optical Properties ◽  
Absorption Bands ◽  
Tauc Plot ◽  
Substrate Temperatures

Nickel(II) phthalocyanine-tetrasulfonic acid tetrasodium salt (NiTsPc) thin films were deposited on glass substrates at different substrate temperatures ([Formula: see text]) by chemical spray pyrolysis (CSP) technique. The substrate temperature varied from 110∘C to 310∘C in 50∘C steps. The substrate surface temperature is the main parameter that determines the film morphology and properties of the thin films. The structural properties of the deposited NiTsPc thin films were investigated by X-ray diffraction (XRD) and from the obtained results, it was shown that depositing thin films using 210∘C as [Formula: see text] results in higher crystallinity. Atomic force microscope (AFM) was employed to obtain the surface topography and to calculate the roughness and grain size. The smoothest thin film surface was obtained when using at 160∘C, while the highest roughness was obtained at 310∘C. The optical properties were investigated by ultraviolet visible (UV-Vis) spectrophotometer and fluorescence spectrophotometer. From the absorption spectra recorded in the wavelength range 190–1100[Formula: see text]nm, two absorption bands were observed, which are known as Soret and Q-band. By observing the absorption spectrum, it can be concluded that the deposited thin films at 110∘C–310∘C have direct energy gap. From Tauc plot relation, the energy gap ([Formula: see text]) was calculated. The values of the energy gap were between 3.05 and 3.14[Formula: see text]eV. It was observed that different [Formula: see text] highly affects the structural and optical properties of the deposited thin films. The crystallinity, grain size, roughness and the optical properties were strongly affected by the different substrate temperatures.

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