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Mixed alkali borate glasses doped with CoO, have been prepared by the melt quenching technique. Elastic properties and FT-IR spectroscopic studies have been employed to study the role of CoO and the mixed alkali effect on the structure of the investigated glass system. Elastic properties and Debye temperature have been investigated using sound wave velocity measurements at 4 MHz at room temperature...
Thermoelectric solid solutions of Bi 2 (Te 1−x Se x ) 3 with x=0, 0.2, 0.4, 0.6, 0.8 and 1 were grown using the Bridgman technique. Thin films of these materials of different compositions were prepared by conventional thermal evaporation of the prepared bulk materials. The temperature dependence of the electrical conductivity σ, free carriers concentration n, mobility...
CdTe thin films were prepared by thermal evaporation under a vacuum of 10 -6 Torr and with a deposition rate of about 60nm/min. X-ray diffraction studies of the as-deposited films revealed polycrystalline films with cubic structure. The effect of heat treatment with or without CdCl 2 enhances the grain size and improves the crystallinity of the films. Moreover, the activation...
Bulk AgSbTe 2 possesses a cubic structure of NaCl type with a = 3.038 A. AgSbTe 2 thin films were prepared by thermal evaporation under vacuum 10 -6torr . The room temperature deposited films were polycrystalline in nature and consisted of two-phases AgSbTe 2 + Ag Te 2 with AgSbTe 2 as a major phase. The optical absorption...
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