Cadmium sulphide (CdS) thin films have been grown on corning glass substrate by thermal evaporation technique under base pressure 2 × 105 mbar. In this study we investigate the influence of Cadmium chloride (CdCl2) heat treatment and argon and oxygen (Ar + O2) annealing on the structural, morphological optical and electrical properties of CdS thin films to achieve high quality ... إقراء المزيد

يشتمل الكتاب على الأساسيات الفيزيائية والظواهر الإنتقالية لأشباه الموصلات وتطبيقاتها إقراء المزيد

The structural and electrical properties of the as-prepared and annealed In45Sb35Se20−_x_Te_x_ thin films with different compositions (_x_ = 2.5, 5, 7.5, 10, 12.5 and 15 at.%) prepared by electron beam evaporation method are studied. The XRD patterns of the as-prepared thin film show that the investigated compositions have amorphous and polycrystalline structure depending on the Te content. After annealing the ... إقراء المزيد

يشتمل الكتاب على معومات هامة عن الخصائص التركيبية والاكترونية للمواد الصلبة وكذلك المبادئ الاساسية للخواص الكهربية والحرارية والمغناطيسية والضوئية لهذه المواد إقراء المزيد

Transparent conducting tin oxide thin films have been deposited by spray pyrolysis technique. The effect of substrate temperature on the structure and optical properties of tin oxide thin films has been studied. The increase in the substrate temperature led to increase the optical transmission. A transmittance value of 84% has been obtained for spray-deposited film at 400 degrees C. The ... إقراء المزيد

Polycrystalline solid solutions of (Bi1 − _x_ Sb _x_ )2Se3 (_x_ = 0, 0.025, 0.050, 0.075, 0.100) were prepared using a facile method based on the conventional melting technique followed by annealing process. X-ray analysis and Raman spectroscopical measurements revealed formation of Bi2Se3 in single phase. The electrical and thermoelectric properties have been studied on the bulk samples in the ... إقراء المزيد

Physical properties of In35Sb45Se20−_x_Te_x_ thin films with different compositions (_x_=2.5, 5, 7.5, 10, 12.5 and 15 at %) prepared by electron beam evaporation method are studied. X-ray diffraction results indicate that the as-evaporated films depend on the Te content and the crystallized compounds consist mainly of Sb2Se3 with small amount of Sb2SeTe2. Transmittance and reflectance of the films are found ... إقراء المزيد

Polycrystalline single phase of Pb1−_x_Sm_x_Se (_x_ = 0.00–0.09) samples were prepared by the solid state reaction. XRD and SEM/EDAX methods were used for structural and chemical characterization of the obtained materials. The investigated samples were also characterized by the measurements of the samarium concentration dependence of the electrical conductivity and Seebeck coefficient. The power factor shows that these materials have ... إقراء المزيد

Sn x Sb 20 Se 80− x chalcogenide alloys (with x= 8, 10, 12, 13.5, 15, 16.5 and 18 at.%) were prepared by the melt quenching technique. The average coordination number and the overall mean bonding energy were calculated. The x-ray diffraction studies revealed that the alloys with x= 8 and 10 at.% were amorphous and the alloy with x= ... إقراء المزيد

We investigate the effects of the ambient temperature (_T_), both temperature (_T_ _a_ )and time (_t_ _a_ )of annealing on the electrical conductivity (σ), and the Seebeck coefficient (_S_) of Sb2Te3. We concluded that both holes and electrons can participate to the conduction process. The material behaves as a semimetal. Although the Seebeck coefficient possesses a plus sign, the coefficient ... إقراء المزيد