thin films


Due to its unique optical and electrical properties of chalcogenides of zinc subgroup metals semiconductor thin films can be used in photovoltaic systems. The largest usage is acquired by CdS films. But due to its toxicity, there is considerable interest in replacing CdS with other semiconductor films with similar or even better properties obtained by chemical bath deposition (CBD). One of the candidates for replacing cadmium sulfide is chemically deposited mercury (II) chalcogenides films.

Suppression of interface impedance contrast in plane-parallel coatings

The paper focuses on the study of spectral and angular conditions for interface antireflection by means of impedance contrast suppression, applying the method of theoretical and computer analysis of the envelope functions of spectra of multibeam interference. The research is conducted in the resonance dispersion region of dielectric constant of the single and binary boundaries that form a plane-parallel structure. The analytical relations between the Brewster/Pseudo-Brewster angles and structure parameters are.

Synthesis and properties of mercury selenide films deposited by using pottasium iodide as complexing agent

Mercury selenide (HgSe) films were obtained on glass substrates via the chemical deposition method. The aqueous solutions of mercurium(II) nitrate, potassium iodide and sodium selenosulfate were used. Film samples obtained at two temperatures of synthesis were analyzed by X-ray and structural analysis. The effect of the deposition duration on the optical and morphological properties of HgSe films was investigated. The deposition mechanism was discussed.

To modeling admixtures influence on the size effects in a thin film

There are formulated the key systems of equation describing  structurally nonhomogeneous two-component solid solutions.  As the key functions there are chosen the stress tensor (displacement vector) and the densities of admixture and skeleton.  On this basis the near-surface nonhomogeneity densities of skeleton and admixture, stresses and  size effects of surface tension and intensity of the power load causing the thin film fracture are studied.  The attention is paid to the admixture influence on size effects.

The Effect of Different Complexing Agents on the Properties of Zinc Sulfide Thin Films Deposited from Aqueous Solutions

The zinc sulfide (ZnS) thin films were prepared on glass substrates by chemical bath deposition using the aqueous solutions of zinc chloride, thiourea, pH regulator and complexing agent (ammonia and hydrazine hydrate, trisodium citrate or sodium hydroxide). The calculations of boundary conditions for formation of zinc sulfide and zinc hydroxide were made at various zinc salt concentrations with different complexing agents. The structural, morphology and optical properties of the ZnS thin films were investigated.