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Information × Registration Number 0221U102168, 0116U002669 , R & D reports Title Optical, electrophysical and structural properties of the disordered molecular systems and nanocomposites. popup.stage_title Head Bondar Mykhailo V., Доктор фізико-математичних наук Registration Date 28-01-2021 Organization Institute of Physics of National Academy of Sciences of Ukraine popup.description2 Project objective: a comprehensive experimental and theoretical study of the electronic energy states, structure, optical and electronic properties of disordered molecular systems of different types (organic and inorganic semiconductors, amorphous media, liquid crystals, thin solid films, nanocomposite materials, solute organic dyes, polymers), revealing and optimization of basic structural and electronic characteristics of new functional materials based on disordered organic media. Objects of investigations: organic and inorganic semiconductors, thin solid films, nanostructured systems based on liquid crystals filled with inorganic nanoparticles or confined to inorganic nanoporous matrices, polymeric laser media, long-chain aliphatic compounds, two-photon-absorbing organic dyes, distributed feedback dye-doped liquid crystal laser. Methods of investigations: upgraded photo- and thermoluminescence methods, FTIR, Raman, and electron spectroscopy; differential scanning calorimetry, electron and atomic force microscopy, X-ray diffraction, femtosecond spectroscopy and nonlinear optics techniques. In this research work, the following main results are obtained. Based on a detailed study of new hybrid 2D-3D metal-organic perovskites with bulk (3D) and layered (2D) crystal structure, for the first time a significant difference was revealed in the charge carrier trap energy distribution depending on the chemical composition and structure of the perovskite. Based on a detailed comprehensive study of the stationary and time-separated spectral-luminescent properties, as well as evaluation of nonlinear optical parameters and the processes of ultrafast vibron relaxation of new squaraine-type molecules and bases of styrene dyes, a significant potential has been revealed for their practical use in two-photon fluorescent microscopy of biological objects as well as in organic optoelectronic devices. Product Description popup.authors Ilchishin Igor P Bezrodna Tamara V Vakhnin Oleksandr Yu Gavrilko Tetyana A Gnatyuk Ivan I Kadashchuk Andriy K Kerita Olga O Klishevych Georgiy V Kurmei Mykola D Melnyk Volodymyr I Mykytiuk Taras V Nesprava Vira V Ostapenko Nina I Ostapenko Yuriy V Roshchyn Oleksandr M Skryshevsky Yuri A Shaidyuk Evgeniy O Shymanovska Valentyna V popup.nrat_date 2021-01-28 Close