Morphological and optical properties of MgO1-xZnSx thin films

Abstract

(MgO) films doped with (ZnS) were prepared using a spray pyrolysis technique. Thin films were deposited on glass substrates at (350°C) with different concentrations (0,2,4,6,8) % of ZnS to study the surface morphology and optical properties. The (AFM) images indicated that increasing the (ZnS) concentrations leads to a decrease in the surface roughness rate. The optical measurements showed a decrease in the transmittance and reflectivity spectrum of all the prepared films, with an increase in (ZnS) concentrations and an increase in the absorption coefficient, refractive index, and extinction coefficient. The values of the real part of the dielectric constant were higher compared to the imaginary part for all the prepared films. Also, the optical energy gap decreased with the increase of (ZnS) concentrations within the range of (2.771-2.549) eV.

Enhancements of Structural and Optical Properties of MgO: SnO2 Nanostructure Films

“…The absorption coefficient (α) describes how well a material can absorb light at a particular wavelength. In the case of MgO: SnO 2 film, an increase in the concentration of MgO leads to a widening of the bandgap [29], which is the energy range where electrons are not available to absorb photons [30,31]. This means that fewer photons are absorbed by the film, resulting in a decrease in the absorption coefficient (α).…”

Influence of Thickness on Some Physical Characterization for Nanostructured MgO Thin Films

“…This reduces the energy gap between the highest occupied molecular orbital and the lowest unoccupied molecular orbital, resulting in a decrease in the energy gap [43,44]. The increased number of electrons also leads to an increase in particle size, as larger particles are needed to accommodate all of the electrons [45]. The following equation can be used to calculate the energy gap for the as-prepared films [46] :…”

“…Additionally, as the thickness of a thin film increases, its capacitance also increases. This is because as the thickness of a thin film increases, its surface area also increases, which allows for more charge to be stored on its surface, and the decrease in mobility can be attributed to an increase in dislocation density and lattice strain [45], as shown in Fig (10).…”

“…MgO has a wide range of applications, including adsorption, reflecting and antireflecting coatings, electronics, fire retardants, ceramics, catalysis, chemical, toxic waste management [10,11], solar cells, laser diodes, and many other high-tech applications [12,13]. Many researchers prepared magnesium oxide films using physical and chemical methods according to the specific application of each method, such as chemical spray pyrolysis [14], electron-beam [15], Pulsed laser [16], Sol-gel [17], chemical vapor [18], and spin coating [19], etc. In the present work, we have tried to study the effect of thickness on Some Physical Characterization of Nanostructured MgO Films on glass substrates by the chemical spray pyrolysis technique.…”

Synthesis and characterization of LiCo1-xNixO2 nanoparticles by urea route as cathode for lithium-ion battery

“…Sophisticated battery technology and reduced system power consumption can extend battery life and provide a competitive edge. [5][6][7][8]. In order to ensure good quality, it's important to maintain reliability, safety, ease of installation, and low cost from a production standpoint.…”