AP19178659 Study of the lattice dynamics of antimony selenide using vibrational spectroscopy

The goal of this project is to study the dynamics of the Sb2Se3 lattice by analyzing Raman spectra obtained in the temperature range 373÷173 K.

Relevance: Over the last decade, one of the most promising materials for use in photovoltaics, energy storage devices, topological insulators, etc. is antimony selenide (Sb2Se3). Interest in these materials is due to the combination of their structural, optical and electrical properties, which allow them to be used as a semiconductor in a wide range of optoelectronic devices. Moreover, in recent years, much attention has been paid to the synthesis of Sb2Se3 with a specific direction of the crystal lattice. The crystal structure of these materials is special; it consists of one-dimensional ribbons connected to each other by van der Waals force. Depending on the scope of application of Sb2Se3, it was possible to change and improve their optoelectronic properties by changing the growth of the inclination and direction of the ribbons. Thus, much attention is paid to the synthesis of Sb2Se3. However, one of the poorly studied and pressing problems regarding antimony selenide is the study of lattice dynamics, in particular anharmonic effects and their effects on optical, optoelectronic and thermoelectric characteristics.

Scientific supervisor: Shongalova A.

Implementation period: 2023-2025.

Quantitative and qualitative composition of project executors: 1 executor, including: 1 PhD