Особенности оптических и энергетических свойств тонких пленок CdSe

The paper presents the results of experimental and theoretical studies of the optical and energy properties of thin CdSe films obtained by the closed space sublimation. The synthesis method, the results of structural and optical studies of thin CdSe films deposited on the surface of a quartz substrate are presented. The quality of the films was analyzed by x-ray diffraction, energy dispersive analysis and scanning electron microscopy. Within the framework of the pseudopotential method, the dynamics of changes in the parameters of the CdSe films electronic subsystem is theoretically studied. The direct-gap nature of the forbidden gap of the film is established. Based on the density of states, the genesis of the conduction band and the valence band is established. Using the Kramers – Kronig relation, we obtained spectra of optical dielectric functions, optical reflection, refractive and extinction indexes, which satisfactorily correlate with the obtained experimental data.

Влияние отжига во фреоне на кристаллическую структуру слоев теллурида кадмия и эффективность пленочных фотоэлектрических преобразователей на их основе

Solar cells (SCs) based on cadmium-telluride base layers, obtained by thermal evaporation and closed-space sublimation (CSS), are investigated. The base layers are activated via annealing in Freon. Structural and morphological studies are carried out to compare the recrystallization processes occurring during annealing in CdTе layers fabricated by different methods. The output parameters and light diode characteristics of the SCs are investigated, and the possibility of applying Freon annealing in the commercial production technology of thin-film CdS/CdTе SCs with base layers formed by thermal vacuum evaporation is analyzed.