scholarly journals Effects of Cu-Doping on Optical Properties of NiO

2015 ◽  
Vol 48 ◽  
pp. 155-162 ◽  
Author(s):  
Nidhal Nissan Jandow
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Extinction Coefficient ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Skin Depth ◽  
Cu Doping ◽  
Uv Visible ◽  
Absorbance Spectra

This work presents the effect of Cu-doping on some optical properties of Cu:NiO thin film prepared by spray pyrolysis technique. UV-Visible spectrophotometer in the range 380-900 nm used to determine the absorbance spectra for various Cu-doping of Cu:NiO thin film. The transmittance and energy gap are decreased with increasing Cu-doping in the prepared films, while absorption coefficient, extinction coefficient, and skin depth are increased with increasing Cu-doping.

scholarly journals Effect of Cu-Doping on Urbach Energy and Dispersion Parameters of Cu:NiO Film Deposited by CSP

2015 ◽  
Vol 48 ◽  
pp. 138-145
Author(s):  
Mohammed Odda Dawood
Keyword(s):  
Thin Film ◽  
Spray Pyrolysis ◽  
Optical Conductivity ◽  
Urbach Energy ◽  
Spray Pyrolysis Technique ◽  
Dispersion Parameters ◽  
Cu Doping ◽  
Uv Visible ◽  
Absorbance Spectra

This work presents the effect of Cu-doping on Urbach energy and dispersion parameters of Cu:NiO thin film prepared by spray pyrolysis technique. UV-Visible spectrophotometer in the range 380-900 nm used to determine the absorbance spectra for various Cu-doping of Cu:NiO thin film. The absorbance and optical conductivity increased with increasing Cu-doping in the prepared films. Dispersion parameters that studied are decreased with increasing Cu-doping while Urbach energy increased.

scholarly journals Optical Characterization of NiO Doped Fe2O3

2015 ◽  
Vol 45 ◽  
pp. 50-58 ◽  
Author(s):  
Sami Salmann Chiad
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Energy Gap ◽  
Optical Characterization ◽  
Skin Depth ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method ◽  
Uv Visible ◽  
Absorbance Spectra

In this paper, the Fe2O3 thin film were prepared with various ratios doping of NiO by spray pyrolysis method on glass substrate temperature 400 °C. The initial solution was including a 0.1 M/L for both NiCl2 and FeCl3 diluted with redistilled water and a few drops of HCl. The effect of NiO-doping on optical properties were studied. UV-Visible spectrophotometer in the range of (300-900) nm used to determine absorbance spectra. The transmittance increased with increasing NiO content in NiO:Fe2O3 thin films, same behavior of extinction coefficient and skin depth. The energy gap increased from 2.45 eV before doping to 2.86 eV after 3% NiO-doping. While the reflectance, absorption coefficient, and refractive index are decreased with increasing NiO content in Fe2O3 thin films.

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 Annealing Temperature Effects on the Optical Properties of CdO Thin Films Deposited by CSP Technique

2014 ◽  
Vol 42 ◽  
pp. 63-71 ◽  
Author(s):  
Sami Salmann Chiad
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Skin Depth ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Chemical Spray ◽  
Uv Visible ◽  
Cdo Thin Films

By chemical spray pyrolysis method. The CdO thin film prepared at constant film thickness (350 nm). The prepared films are annealed at a temperature of 450 and 500 °C. The optical properties are calculated from the measurement of UV-Visible spectrophotometer spectrum in the range of (300-900) nm at room temperature. The transmittance, absorption coefficient, extinction coefficient, refractive index, and skin depth are calculated as annealing temperature. The energy gap decreased from 2.52 eV to 2.47 eV when the annealing temperature increased from room temperature to 500 °C.

scholarly journals Annealing Effects on the Some Optical Properties of Fe2O3 Thin Films Doped by NiO

2016 ◽  
Vol 8 ◽  
pp. 44-50 ◽  
Author(s):  
Nadir Fadhil Habubi ◽  
Sami Salman Chiad ◽  
Khalid Haneen Abass ◽  
Mahmood Muwafaq Abood
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nickel Oxide ◽  
Spray Pyrolysis ◽  
Glass Substrate ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Annealing Effects ◽  
Uv Visible

Nickel oxide doped Fe2O3thin films have been prepared by spray pyrolysis technique on glass substrate. The initial solution was including a 0.1 M/L for both NiCl2and FeCl3diluted with redistilled water and a few drops of HCl. The effect of annealing temperature on optical properties was studied, using UV-Visible spectrophotometer to determine absorption spectra at a thickness of 400 nm. The reflectance increased with increasing annealing temperature, such as α, k, and n.While the transmittance decreases with increasing annealing temperature and the energy gap decreased from 2.68 eV before annealing to 2.70 eV after 500°C annealing temperature.

scholarly journals Effect of Sb-doping on Optical Properties of Fe2O3 Thin Films

2020 ◽  
Vol 20 (3) ◽  
pp. 1-10
Author(s):  
Wasmaa A. Jabbar
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Extinction Coefficient ◽  
Spray Pyrolysis Technique ◽  
Undoped Film ◽  
Technique Effect ◽  
Double Beam ◽  
Opposite Behavior ◽  
Sb Doping

Fe2O3 and Sb doped Fe2O3 thin films with deferent percentage wereintended via spray pyrolysis technique. Effect of Sb doped on opticalparameters was studied utilizing Double beam spectrophotometer in orderto locate transmittance spectra. Absorbance was raised with accretion of Sbconcentration, same behavior was noticed for extinction coefficient. Energygap was decreased from 3.25 eV for undoped film to 3.0 eV on 3% Sbdoping., while Reflectance, absorption coefficient and refractive indexwere shown the opposite behavior by decrease their values with increasingof Sb.

scholarly journals Effects of Non-Thermal Argon Plasma Produced at Atmospheric Pressure on the Optical Properties of CdO Thin Films

2018 ◽  
Vol 15 (2) ◽  
pp. 221-226
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Extinction Coefficient ◽  
Energy Gap ◽  
Cadmium Oxide ◽  
Argon Plasma ◽  
Chemical Spray Pyrolysis ◽  
Cdo Thin Films

In this paper the effect of nonthermal atmospheric argon plasma on the optical properties of the cadmium oxide CdO thin films prepared by chemical spray pyrolysis was studied. The prepared films were exposed to different time intervals (0, 5, 10, 15, 20) min. For every sample, the transmittance, Absorbance, absorption coefficient, energy gap, extinction coefficient and dielectric constant were studied. It is found that the transmittance and the energy gap increased with exposure time, and absorption. Absorption coefficient, extinction coefficient, dielectric constant decreased with time of exposure to the argon plasma

scholarly journals Copper Molarity Effect on the Optical Properties of Cu2CdSnS4 Quaternary Thin Films

2021 ◽  
pp. 1513-1523
Author(s):  
Shaymaa Khashea Abdo ◽  
Jamal M. Rzaij
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Absorption Edge ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Visible Range ◽  
Chemical Spray Pyrolysis ◽  
Copper Solution ◽  
Average Grain Size

 The quaternary alloy of Cu2CdSnS4 (CCSS) is one type of thin film materials that contributes to the field of photovoltaic devices manufacturing, the importance of which has not been commonly enlightened as most of the other materials. For the preparation of CCSS thin films at 350 °C on glass substrates, the chemical spray pyrolysis technique was used. The optical properties of thin films prepared under the influence of the variation of copper solution molarity (0.03, 0.05, 0.07, and 0.09 M) on the quaternary compound were examined using a UV-vis spectrophotometer. The findings of the AFM study showed the atoms on the surface that are acclimatized in the form of nanorods with an increase in the average grain size from 62.72 to 79.17 nm. The results also showed an improvement in the average surface roughness from 5.69 to 12.8 nm when copper concentration increased from 0.03 to 0.09 M. The UV-vis results showed that the optical transmittance of CCSS decreases by increasing the solution molarity of copper, with a change in the absorption edge toward the low energy side (redshift). With an increase in the wavelength between 725 and 960 nm, a low absorption coefficient was found in the infrared region, while a strong absorption coefficient in the visible range was observed with the increase in copper solution molarity. The energy gap values decreased from 1.6 to 1.47 eV when copper solution molarity increased from 0.03 to 0.09 M. By raising copper solution molarity to 0.09 M, the refractive index at the absorption edge was increased from 1.6 to 1.97, while the extinction coefficient reduced.

scholarly journals Laser Induced Modification of the Optical Properties of Nano-ZnO Doped PVC Films

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Tagreed K. Hamad ◽  
Rahimi M. Yusop ◽  
Wasan A. Al-Taa’y ◽  
Bashar Abdullah ◽  
Emad Yousif
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Optical Conductivity ◽  
Extinction Coefficient ◽  
Energy Gap ◽  
Laser Energy ◽  
Casting Method ◽  
Refractive Index Increase ◽  
Transmission Energy

The effect of continuous CO2laser radiation on the optical properties of pure polyvinyl chloride and doped of ZnO nanoparticles with two different concentrations (10, 15%) has been investigated. All samples were prepared using casting method at room temperature. Optical properties (absorption, transmission, absorption coefficient, extinction coefficient, refractive index, and optical conductivity) of all films after CO2laser irradiated have been studied as a function of the wavelength in the range (200–800) nm for three energies (300, 400 and 500 mJ). It has been found that the transmission, energy gap, and refractive index increase with increasing laser energy. The values of absorption, Urbach energy, absorption coefficient, extinction coefficient, and optical conductivity were decreased.

scholarly journals The effect of gold nanoparticles on WO3 thin film

2018 ◽  
Vol 16 (36) ◽  
pp. 11-28
Author(s):  
Isam M. Ibrahim
Keyword(s):  
Thin Film ◽  
Gold Nanoparticles ◽  
Optical Properties ◽  
Substrate Temperature ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Oxide Thin Film ◽  
Au Nanoparticle ◽  
Chemical Spray Pyrolysis

Chemical spray pyrolysis technique was used at substrate temperature 250 ˚C with annealing temperature at 400 ˚C (for 1hour) to deposition tungsten oxide thin film with different doping concentration of Au nanoparticle (0, 10, 20, 30 and 40)% wt. on glass substrate with thickness about 100 nm. The structural, optical properties were investigated. The X-ray diffraction shows that the films at substrate temperature (250 ˚C) was amorphous while at annealing temperature have a polycrystalline structure with the preferred orientation of (200), all the samples have a hexagonal structure for WO3 and Au gold nanoparticles have a cubic structure. Atomic force microscopy (AFM) was used to characterize the morphology of the films. The optical properties of the films were studied using UV-Vis spectrophotometer within the wavelength in the range (300-1100) nm. The optical energy gap of the films was (2.80) eV for WO3 and it decreased at annealing temperature (400 ˚C) equal to (2.65) eV. And finally the optical constants such as refractive index, real and imaginary dielectrics, absorption coefficient, absorption, transmission, and extinction coefficient were investigated.

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