OPTICAL PROPERTIES AND STUDY OF THE GROWTH MECHANISMS OF TWO-DIMENSIONAL CdSe NANOPLATELETS

Modern studies demonstrate that two-dimensional nanomaterials hold great promise for various practical applications. At present, 2D materials are being actively investigated through colloidal synthesis in specialized formats, enabling the creation of materials with precisely defined structures and the enhancement of their functional properties. CdSe nanoplatelets (NPLs) exhibit high efficiency in light absorption and photoluminescence, making them suitable for applications in solar cells and optical devices. The synthesis of quantum-confined CdSe NPLs is carried out in colloidal solvents. The dependence of NPL photoluminescence on temperature and precursor injection has been studied. It has been established that with an increase in NPL thickness, their photoluminescence spectra shift to the longer wavelength region as the temperature rises. The study presents the dependence of precursor concentration in the reaction medium and the growth mechanism of NPLs. Additionally, the work explores the specifics of colloidal synthesis of CdSe NPLs, provides a detailed characterization of their properties, and substantiates the theory of nanostructure growth.