Thin-film CdS/CdTe solar cells fabricated on glass substrates have been considered as one of the most promising candidates for large-scale applications in the field of photovoltaic energy conversion. The recorded experimental efficiency of these cells is about 16%–17% and the corresponding theoretical values are more than 28%. The main causes of efficiency loss are due to optical and recombination losses. ... إقراء المزيد

Indium oxide In2O3 nanowires have been recently synthesized revealing interesting properties and used in various applications. In order to reduce as much as possible the influence of undesired dopants and/or impurities on the observed properties, In2O3 nanowires have been grown without the use of catalysts, directly from metallic indium by a vapor transport technique and a controlled oxidation with oxygen–argon ... إقراء المزيد

In this paper, ZnO films were prepared by oxidizing the Zn film deposited by electron beam evaporation on glass substrates. The oxidation process was carried out at three-step of annealing process. At first step, the Zn films were annealed at temperature of 300 0C for one hour to form ZnO layers on the surface of the Zn films to prevent ... إقراء المزيد

High quality ZnO nanocombs have been fabricated in high yields through oxidative evaporation of pure zinc powder without catalyst at 600–650 C. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations showed that the resulting ZnO nanostructures have one main type of single crystal morphology. Investigations through XRD revealed that the growth of the synthesized ZnO nanostructures was controlled ... إقراء المزيد

Indium tin oxide (ITO) thin films were prepared by electron beam evaporation at different substrate temperatures. The structural studies were carried out by X-ray diffraction. Optical properties of the films were studied in the ultraviolet-visible-near infrared (UV-Vis-NIR) region (200 to 2500 nm). Electrical studies were carried out at room temperature of ITO films. The results showed that with increase in ... إقراء المزيد

p-Type thin films of copper-strontium oxide (Cu-Sr-O) have been deposited by e-beam evaporation technique on microscopic glass substrates. A study of optical, electrical and structural properties was performed on the thin films, varying temperature of annealing. Amorphous Cu-Sr-O films were obtained at low temperature. Partially polycrystalline films were obtained at high temperature of 550◦ C with transparency over 72% at ... إقراء المزيد

WOx films were prepared by reactive dc magnetron sputtering using tungsten target. Sputtering was carried out at a total pressure of 1.2 Pa using a mixture of argon plus oxygen in an effort to determine the influence of the oxygen partial pressure on structural and optical properties of the films. The deposition rate decreases significantly as the surface of the ... إقراء المزيد

Transparent conducting antimony-doped tin oxide SnO2:Sb films were prepared on glass substrates by e-beam evaporation technique. The effect of Sb-content and annealing temperature on the optical, electrical and structural properties of the formed films were investigated. The as-deposited films show amorphous structure and low transmittance that increased with increasing Sb-content. Upon annealing, the film ordering increases. The annealed (SnO2)100–xSbx (x= ... إقراء المزيد

Zinc nitride (ZnN) films were prepared by electron beam evaporation technique. The effect of heat treatments on the structural and optical properties of these films were studied. The as-deposited films show amorphous structure and some peaks which are related to Zn3N2 and ZnO can be observed for annealed films. The study of the optical gap shows that these films have ... إقراء المزيد

Thin films of vanadium pentoxide (V2O5) on glass substrates were produced by e-beam evaporation technique. The effect of sintering process and annealing temperature on the morphology and optoelectronic properties of these films were studied. The obtained results from scan electron microscope show that, the grain size of V2O5 films increases with increasing both the temperature of sintering and annealing temperature. ... إقراء المزيد