mahrous.r.ahmed

Mahrous R Ahmed

Professor -

Faculty of science

Address: Physics Department - Science Faculty - Sohag University - Egypt

17

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Publications Which contain the keyword: optical properties


2021-08-29 14:03:53 Keywords optical properties,
Optical and structure properties of CdTe/CdS films under influence of both CdCl2 heat treatment and (O2 + Ar) atmosphere
Thin films of CdTe/CdS were prepared using the thermal evaporation technique with pressure 2 × 10−5 mbar on substrate from glass. The thickness of CdCl2 layer around 150 nm was deposited making as-deposited CdTe/CdS films. The films covered by cadmium chloride (CdCl2) layer were annealed in atmosphere of (O2 + Ar) at different temperatures of 400 °C, 450 °C and ... Read more

Effect of the synthesis conditions on the structural, morphological and optical properties of Bi2Te2. 7Se0. 3 nanoparticles
Beside their promising utility as thermoelectric generators, Bi2Te3 and related compounds have several applications in electronic and optoelectronic devices. In this work, Bi2Te2.7Se0.3 nanoparticles (NPs) were successfully prepared via physical vapor deposition technique at different conditions of flow rate and temperature. The x-ray diffraction patterns show that, the NPs crystallize in a rhombohedral crystal structure with preferable growth along the ... Read more

2018-10-05 17:42:50 Keywords V doped In2O3, Structural properties, optical properties,
Effects of V doping on magnetic and optical properties of oxygen-deficient In2O3 thin films
The scope of the work was to study structural, optical and magnetic behaviors of vanadium (V) doped indium oxide thin films prepared by thermal evaporation. Thin films of vanadium doped oxygen deficient In2O3 were deposited on sapphire, corning glass and Si(100) substrates. EDAX analysis revealed a great reduction in oxygen was happen during evaporation and oxygen deficient undoped and V ... Read more

Effect of heat treatment on structural, optical and mechanical properties of sputtered TiOxNy films
The thermal stability of optical functional coatings is of prime importance for high-temperature applications. TiO_x_N_y_ films were deposited by reactive dc magnetron sputtering at room temperature. The influence of the annealing temperature on the structural, mechanical and optical properties of amorphous TiO_x_N_y_ films was investigated. Rutherford Backscattering Spectroscopy (RBS) measurements showed no variation in the stoichiometry upon annealing for samples ... Read more

2018-09-23 19:49:12 Keywords optical properties,
Optical study of the insulator-to-metal transition in LaxMnO3 thin films
Lanthanum manganites with a massive concentration of La defects can be stabilized in the form of thin films, by exploiting the structural stress produced by a substrate such as SrTiO3. They undergo an insulator-to-metal transition (IMT) like those doped by divalent ions, which is here studied by measuring the optical conductivity of La_x_MnO films with _x_ = 0.66, 0.88, 0.98 ... Read more

2018-09-24 10:32:04 Keywords optical properties,
Characterization of n and p-type (SnO2)x(ZnO)1–x nanoparticles thin films
Transparent conductive oxide (TCOs) materials still occupy the attention of many scientific researchers because of their important properties including high transmittance and high electrical conductivity. The doping process whether intrin_s_ic or extrinsic materials. For example, elements of Group-III doped ZnO (B,Al,In,Ga) and group IV (Sn,Pb) has led to changes in optoelectronic properties [An H., 2014, Mahmoud W.E.,2011, Bae S.Y.,2005, Lee ... Read more

2018-09-27 11:24:52 Keywords Ge-Sb-Se, optical properties,
Optical and calorimetric studies of Ge–Sb–Se glasses
Optical properties of amorphous Ge_x_Sb40 − _x_Se60 (_x_=22.5, 25, 27.5, 30 and 32.5 at.%) thin films prepared by electron beam evaporation have been measured in the visible and near-infrared spectral region. The variations of the electronic energy gap (_E_g) with composition are discussed on the basis of both the overall mean bond energy and the topological model based on the ... Read more

Transparent conducting ZnO-CdO thin films deposited by e-beam evaporation technique
Thin films of Zn1−x CdxO with x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5 at.% were deposited by electronbeam evaporation technique. It has been found that, for as-deposited films, both the transmittance and electrical resistivity decreased with increasing the Cd content. To improve the optical and electrical properties of these films, the effect of annealing temperature and time were ... Read more

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