Structural and Optical Properties of Boron Doped Cadmium Oxide

Abstract

Thin films of transparent and conductive CdO and B1,3)w% doped cadmium oxide (CdO: B) (1 and 3) wt %, have been deposited using chemical spray pyrolysis (CSP)) technique on glass substrate temperature of 300°C. Microstructural analysis indicates that X-ray diffraction study shows that the obtained films were polycrystalline. The preferred orientation was along the direction (200) and that the average crystallite size increases with the increasing B content. Morphological properties were studied, by scanning electron microscope (SEM) and atomic force microscopy (AFM) which reveals that the grains have a similar column shape. UV-visible transmission spectroscopy reveal that the prepared thin films are transparent in the visible range, The value of the optical band gap obtained shows a slight increase in its values from 2.43 eV to 2.45 eV as B concentration increasing.

Sensitivity of Nanostructured Mn-Doped Cobalt Oxide Films for Gas Sensor Application

“…Equation 3was used to calculate the dislocation density δ; Fig. 2 displays the dislocation density increasing as Mn concentration increased, which agreed with the results obtained in previous studies [32,33].…”

Untitled

“…Figure 2 shows the transmittance (T) of the nanocomposite measured as a function of wavelengths. The transmittance spectra are the opposite absorption spectra, which decreased with the increase of (TiO2-Al2O3) concentration, and this behavior is attributed to the increase of the absorption spectra which conforms to Lambert-Beer law (Khadayeir, 2019) Figure 3 indicates that as the concentration of (TiO2-Al2O3) nanoparticles increases, the absorption coefficient of (PS-TiO2-Al2O3) nanocomposites increases, which is due to an increase in the number of carrying charges. The absorption coefficient increases as the concentration of (TiO2-Al2O3) increases, as shown in the graph.…”

Effect of Vanadium on Structure and Morphology of SnO2 Thin Films

“…The linear relationship between (αhv) 2 and hυ could be observed in high energy area of 8 -10 (eV/cm) 2 . By extrapolating the linear behavior of the curve, which represented the energy needed for the electron to move from valence band (VB) to conduction band (CB) [26]. Its value was 3.82 eV for the undoped model and decreased to 3.54 eV for the film of 2wt% and then 3.48 eV for the 4wt% film.…”