Peculiarities of the Optical and Energy Properties of Thin CdSe Films

Abstract

The results of experimental and theoretical studies of the optical and energy properties of thin CdSe films obtained by the quasi-closed volume method are presented. The synthesis methodology and the results of structural and optical studies of thin CdSe films deposited on the surface of a quartz substrate of brand KV (GOST (State Standard) 15130-86) are given. The quality of the films is analyzed using the X-ray diffraction, energy dispersive analysis, and scanning electron microscopy techniques. Using the pseudopotential method, the dynamics of changes in the parameters of the electronic subsystem of a CdSe film is theoretically studied. The direct-gap nature of the energy gap of the film is established. Based on the density of states, the genesis of the conduction and valence bands is established. Using the Kramers–Kronig relations, we obtained the spectra of optical dielectric functions and the reflectance, refractive index, and extinction spectra, which satisfactorily correlate with the obtained experimental data.