Стаціонарна та розділена в часі фотолюмінесценція наноструктурованих плівок сульфіду олова

• Date: 2026
• Main Authors: Gnatenko, Yu.P., Bukivskii, A.P., Bukivskij, P.M., Iliash, S.A., Vertegel, I.G., Ovcharenko, O.I., Opanasyuk, A.S., Gamernyk, R.V., Furyer, M.S.
• Format: Article
• Language: English; Ukrainian
• Published: Publishing house "Academperiodika" 2026
• Subjects: фотолюмiнесценцiя; кiнетика; заборонена зона; дефекти; фазовий стан; наноструктурованi плiвки
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023964
• Journal Title: Ukrainian Journal of Physics

In this work, the optical properties, including the photoluminescence spectra and their kinetics, of thick SnS films in the orthorhombic phase with low-level microdeformation were studied. They have the composition close to the stoichiometry. Besides, these films contain a small quantity of other crystalline phases, namely, SnS, SnS2, SnO2 and, possibly, Sn2S3 phases. The study of the absorption coefficient first and second derivative spectra, i.e. the ACFD and ACSD spectra, allowed us to determine exactly the band gaps of various crystalline phases. The analysis of ACSD spectra also makes it possible to obtain information regarding the homogeneity of the investigated nanomaterials, which is very important for the optimization of their crystal and optical quality. The study of the photoluminescence spectra allowed us to obtain information regarding the energy structure of the nanostructured SnS films and the nature of their defects. Based on the photoluminescence decay kinetics measurements, the lifetime distributions for different recombination processes in SnS2 and SnO2 were studied. Such studies made it possible to determine the lifetimes for various recombination processes and thus obtain additional information about their nature associated with a certain type of optical transitions, which are determined by the energy of such optical transitions. It was shown that the excited-state lifetimes in the investigated films are in the nanosecond range. Thus, the results obtained may help to develop new fast-acting, efficient nanomaterials suitable for creating ecological absorber layers for solar cells based on them.