scholarly journals Impact of Dy2O3 Substitution on the Physical, Structural and Optical Properties of Lithium–Aluminium–Borate Glass System

2020 ◽  
Vol 10 (22) ◽  
pp. 8183
Author(s):  
Osama Bagi Aljewaw ◽  
Muhammad Khalis Abdul Karim ◽  
Halimah Mohamed Kamari ◽  
Mohd Hafiz Mohd Zaid ◽  
Noramaliza Mohd Noor ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excited States ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Melt Quenching ◽  
Laser Applications ◽  
X Ray ◽  
Lithium Aluminium ◽  
Prepared Glass

In this study, a series of Li2O-Al2O3-B2O3 glasses doped with various concentrations of Dy2O3 (where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 mol%) were prepared by using a conventional melt-quenching technique. The structural, physical and optical properties of the glasses were examined by utilising a variety of techniques instance, X-ray diffraction (XRD), UV–Vis-NIR spectrometer, Fourier transform infrared (FTIR) and photoluminescence (PL). The XRD spectra demonstrate the amorphous phase of all glasses. Furthermore, the UV-vis-NIR spectrometers have registered optical absorption spectra a numbers of peaks which exist at 1703, 1271, 1095, 902, 841, 802, 669, 458, 393 and 352 nm congruous to the transitions from the ground of state (6H15/2) to different excited states, 6H11/2, 6F11/2 + 6H9/2, 6F9/2 + 6H7/2, 6F7/2, 6F5/2, 6F3/2, 4F9/2, 4I15/2, 4F7/2 and 6P7/2, respectively. The spectra of emission exhibit two strong emanation bands at 481 nm and 575 nm in the visible region, which correspond to the transitions 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2. All prepared glass samples doped with Dy2O3 show an increase in the emission intensity with an increase in the concentration of Dy3+. Based on the obtained results, the aforementioned glass samples may have possible applications, such as optical sensor and laser applications.

Effects of Fe and Ni Co-Doping on the Optical Properties of TiO2 Thin Films

2019 ◽  
Vol 19 (01) ◽  
pp. 1850046
Author(s):  
Mahboubeh Yeganeh ◽  
Maliheh Mousavi
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Oxygen Vacancies ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Tio2 Thin Films ◽  
X Ray ◽  
Co Doping ◽  
Uv Visible

In this work, the effects of Fe/Ni co-doping on structural and optical properties of TiO2 thin films were investigated by the X-ray diffraction, scanning electron microscope and UV-visible spectroscopy. The optical properties of transmittance, extinction coefficient, refractive index, real and imaginary parts of dielectric constant of the thin films, prepared by spray pyrolysis, revealed that the absorption in visible region increases due to the influence of Fe/Ni co-doping. The widening of the gap energies is observed as a result of doping. The increased optical gap as a consequence of doping can be explained by decreasing the size of nanoparticles, as confirmed by SEM and increasing the formation of oxygen vacancies as a result of Ni[Formula: see text] substitution to Ti[Formula: see text] and appearance of the Burstein–Moss effect.

Structural and optical properties of Tin Oxide and Indium doped SnO2 thin films deposited by thermal evaporation technique

2016 ◽  
Vol 12 (3) ◽  
pp. 4394-4399
Author(s):  
Sura Ali Noaman ◽  
Rashid Owaid Kadhim ◽  
Saleem Azara Hussain
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tin Oxide ◽  
Thermal Evaporation ◽  
Pure Sno2 ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Evaporation Technique ◽  
Sno2 Thin Films

Tin Oxide and Indium doped Tin Oxide (SnO2:In) thin films were deposited on glass and Silicon  substrates  by  thermal evaporation technique.  X-ray diffraction pattern of  pure SnO2 and SnO2:In thin films annealed at 650oC and the results showed  that the structure have tetragonal phase with preferred orientation in (110) plane. AFM studies showed an inhibition of grain growth with increase in indium concentration. SEM studies of pure  SnO2 and  Indium doped tin oxide (SnO2:In) ) thin films showed that the films with regular distribution of particles and they have spherical shape.  Optical properties such as  Transmission , optical band-gap have been measured and calculated.

scholarly journals Structural and optical properties of SnO2–Al2O3 nanocomposite synthesized via sol-gel route

2015 ◽  
Vol 33 (4) ◽  
pp. 714-718 ◽  
Author(s):  
Neeraj K. Mishra ◽  
Chaitnaya Kumar ◽  
Amit Kumar ◽  
Manish Kumar ◽  
Pratibha Chaudhary ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Properties ◽  
Sol Gel ◽  
Physical Interaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Sensing Applications ◽  
Scanning Electron

AbstractA nanocomposite of 0.5SnO2–0.5Al2O3 has been synthesized using a sol-gel route. Structural and optical properties of the nanocomposite have been discussed in detail. Powder X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray diffraction spectroscopy confirm the phase purity and the particle size of the 0.5SnO2–0.5Al2O3 nanocomposite (13 to 15 nm). The scanning electron microscopy also confirms the porosity in the sample, useful in sensing applications. The FT-IR analysis confirms the presence of physical interaction between SnO2 and Al2O3 due to the slight shifting and broadening of characteristic bands. The UV-Vis analysis confirms the semiconducting nature because of direct transition of electrons into the 0.5SnO2–0.5Al2O3 nanocomposites.

Structural and Optical Properties of Al Co-Doped ZnCoO Thin Film

2014 ◽  
Vol 989-994 ◽  
pp. 656-659
Author(s):  
Ping Cao ◽  
Yue Bai
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Al Doping ◽  
X Ray ◽  
Uv Emission ◽  
Uv Absorption Spectroscopy ◽  
Co Doped

Al co-doped ZnCoO thin film has been prepared by a sol-gel method. The structural and optical properties of the sample were investigated. X-ray diffraction and UV absorption spectroscopy analyses indicate that Al3+ and Co2+ substitute for Zn2+ without changing the wurtzite structure. With the Al doping, the visible emission increased and the UV emission decreased, which is attributed to the increase of O vacancies and Zn interstitials.

scholarly journals Laser induced plasma of cadmium oxide: structural, morphological and optical properties

2021 ◽  
Vol 2114 (1) ◽  
pp. 012012
Author(s):  
Tamara S. Hussein ◽  
Ala F. Ahmed
Keyword(s):  
Optical Properties ◽  
Energy Gap ◽  
Cadmium Oxide ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Optical Energy Gap ◽  
X Ray ◽  
Laser Induced Plasma ◽  
Atomic Force ◽  
Doping Ratio

Abstract In this study, the effect of grafting with Iron (Fe) ratios (0.1, 0.3 and 0.5) on the structural and optical properties of cadmium oxide films (CdO) was studied, as these films were prepared on glass bases using the method of pulse laser deposition (PLD). The crystallization nature of the prepared films was examined by X-ray diffraction technique (XRD), which showed that the synthesis of the prepared films is polycrystalline, and Atomic Force Microscope (AFM) images also showed that the increased vaccination with Iron led to an increase in the crustal size ratio and a decrease in surface roughness, The absorption coefficient was calculated and the optical energy gap for the prepared thin films. It was found the absorption decreases and the energy gap decreases with the increase of doping ratio.

Growth and Magneto-Optical Properties of CaTbAlO4 Crystal

2011 ◽  
Vol 306-307 ◽  
pp. 1722-1727 ◽  
Author(s):  
Man Mei ◽  
Li Li Cao ◽  
Yan He ◽  
Ru Ru Zhang ◽  
Fei Yun Guo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Room Temperature ◽  
Near Infrared ◽  
Visible Region ◽  
Czochralski Method ◽  
Optical Devices ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infrared Spectral

The calcium terbium aluminate (CaTbAlO4) single crystal was grown by Czochralski method successfully for the first time.The structure of the crystal was determined by X-ray diffraction analysis.The transmission spectrum of the crystal was measured at room temperature at the wavelength of 400-1500nm.The specific Faraday rotation of the single crystal was surveyed at room temperature at the wavelength 532nm, 633nm, and 1064nm respectively.The Verdet constants of the CaTbAlO4 crystal are calculated and the results show that the Verdet constants of CaTbAlO4 are around 110% higher than that of TGG in the visible and near-infrared spectral region.Therefore,crystal CaTbAlO4 can be promising material for the fabrication of magneto-optical devices in the visible region.

Effect of Different Radios of Two Complexes on the Structural and Optical Properties of ZnS Thin Films

2014 ◽  
Vol 986-987 ◽  
pp. 47-50
Author(s):  
Jin Shang ◽  
Huan Ke ◽  
Shu Wang Duo ◽  
Ting Zhi Liu ◽  
Hao Zhang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Visible Region ◽  
Deposition Process ◽  
X Ray Diffraction ◽  
High Concentration ◽  
Structural And Optical Properties ◽  
Glass Substrates ◽  
Direct Band ◽  
Cbd Method

ZnS thin films were deposited at three different radios of V(NH3·H2O)/V(N2H4) on glass substrates by chemical bath deposition (CBD) method without stirring the deposition bath during the deposition process. The structural and optical properties were analyzed by X-ray diffraction (XRD) and UV-VIS spectrophotometer. The results showed that ZnS thin film deposited at the radio of V(NH3·H2O)/V(N2H4)=15:15 is higher than that of the other two different solutions. With the radio of V(NH3·H2O)/V(N2H4) decreasing from 15:5 to 15:15, homogenous precipitation of Zn (OH)2easily forms in the bath, but ZnS precipitation first become suppressed and then easily forms in solution. It means that the concentration of OH-ion increases with the volume of N2H4increasing, which accelerates the formation of Zn (OH)2. However, when the volume of N2H4increases to 15mL, relatively high concentration of OH-ion not only accelerates the formation of Zn (OH)2, but also be used to the hydrolysis of thiourea. The average transmissions of all the ZnS films from three different solutions (V(NH3·H2O)/V(N2H4)=15:5, 15:10 and 15:15) are greater than 90% for wavelength values in visible region. The direct band gaps range from 3.80 to 4.0eV. The ZnS film deposited for 2.5h with the radio of V(NH3·H2O)/V(N2H4)=15:15 has the cubic structure only after single deposition.

scholarly journals Influence of Different Annealing Temperatures on the Structural and Optical Properties of TiO2 Nanoparticles Synthesized via Sol-Gel Method: Potential Application as UV Sensor

2021 ◽  
Vol 21 (2) ◽  
pp. 279
Author(s):  
Nur Munirah Safiay ◽  
Rozina Abdul Rani ◽  
Najwa Ezira Ahmed Azhar ◽  
Zuraida Khusaimi ◽  
Fazlena Hamzah ◽  
...  
Keyword(s):  
Optical Properties ◽  
Anatase Phase ◽  
Sol Gel ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Tio2 Thin Films ◽  
Xrd Pattern ◽  
X Ray ◽  
Annealing Temperatures

In this research, TiO2 thin films were prepared using a simple sol-gel spin coating process. The films were characterized using Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive Ray (EDX), X-ray diffraction (XRD) and Ultraviolet–visible Spectrophotometer in order to investigate the influence of different annealing temperatures to the structural and optical properties of TiO2. The surface morphology images from FE-SEM display a uniform layer of nanoparticles with a sample of 500 °C possess the most uniform and the visible spherical grain of TiO2 nanoparticles. EDX spectra confirm the presence of Ti and O elements in the samples. The structural properties from the XRD pattern demonstrate that the films are crystalline at a temperature of 500 and 600 °C and the peak (101) intensity was increased as the annealing temperature increased. They exist in the anatase phase at the preferred plane orientation of (101). The calculated crystallite size for 500 and 600 °C samples is 19.22 and 28.37 nm, respectively. The films also possessed excellent absorption in the ultraviolet (UV) region with optical band gap energy ranging from 3.32 to 3.43 eV. These results can be fundamental for the fabrication of a UV sensing device.

Effect of Deposition Time on Structural and Optical Properties of ZnO Thin Films Deposited by Spray Pyrolysis

2019 ◽  
Vol 397 ◽  
pp. 81-87 ◽  
Author(s):  
Farid Khediri ◽  
Abdelkader Hafdallah ◽  
Mouna Bouhelal
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Deposition Time ◽  
Spray Pyrolysis Technique ◽  
Precursor Solution ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray

In this work Zinc oxide thin films prepared by spray pyrolysis technique. A set of ZnO thin films were deposited with various deposition times, on glass substrate at 350 °C. The precursor solution is formed with zinc acetate in distilled methanol with 0.1 molarity. The deposition time was ranged from 2 to 8 min. The structural and optical properties of those films were examined by X-ray diffraction (XRD) and ultraviolet-visible spectrometer (UV). X-ray diffraction patterns of the ZnO thin films showed polycrystalline hexagonal wurtzite structure and the preferred orientation was along (002) plane when the grain size varied between 9.66 and 16.67nm. ZnO thin films were highly transparent in the visible with the maximum transmittance of 85% and the optical band gap was found between 3.25 and 3.28 eV.

THEORETICAL AND EXPERIMENTAL STUDIES ON SILOXENE

1993 ◽  
Vol 07 (21) ◽  
pp. 1343-1364 ◽  
Author(s):  
P. DEÁK ◽  
M. STUTZMANN ◽  
M. S. BRANDT ◽  
M. ROSENBAUER ◽  
S. FINKBEINER ◽  
...  
Keyword(s):  
Experimental Data ◽  
Optical Properties ◽  
Magnetic Resonance ◽  
Quantum Chemical ◽  
Experimental Studies ◽  
X Ray Diffraction ◽  
Absorption Coefficients ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Equilibrium Structures

Structural and optical properties of siloxene ( Si 6 O 3 H 6) and its derivatives obtained by chemical substitution or annealing are reviewed. The preparation of siloxene is briefly described and results of x-ray diffraction and infrared absorption are shown. The equilibrium structures of stoichiometric siloxene and the electronic properties of the corresponding 2, 1, and 0-dimensional Si-clusters are obtained from quantum chemical calculations and compared to other calculations. Experimental results concerning luminescence, luminescence excitation, absorption coefficients, magnetic resonance, and stability are presented. The origin of the optical properties of siloxene is discussed based on the accumulated experimental data and on the results of theoretical modeling.

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