Bespalova I. Development of technologies for obtaining of luminescent nanostructured composite materials

The work is devoted to the development of technologies for obtaining luminescent nanostructured composite materials based on highly porous inorganic matrices SiO2, Al2O3, CaCO3 and organic and/or inorganic phosphors introduced into matrices pores, with specified structural, geometric, luminescent and scintillation parameters defined by the field of application of these materials; development and improvement of methods for nanoporous matrices obtaining in the form of bulk samples, films, micro- and nanospheres. The influence of the matrices structural parameters on luminescent and scintillation characteristics of composite materials are established. The structural, luminescent, and scintillation properties of the obtained nanostructured composite materials were studied. The methods for the obtaining of the nanoporous matrices in the form of three-dimensional samples, films, micro- and nanospheres, are developed and improved. Established is the influence of the structure parameters of the matrices on the luminescent and scintillation characteristics of the composite materials. It is shown that the content of organic luminophor in the material must amount to 3-4 mass%. Developed is the principle of incorporation of organic luminophors and/or inorganic nanocrystals in the composite material structure for realization of nonradiative transfer of electron excitation energy with an efficiency of 40% and higher. The structure, luminescent and scintillation properties of the obtained nanostructured composite materials are investigated. Keywords: nanostructured composite material, porosity parameters, organic phosphors, nanocrystals, luminescence, light yield, energy transfer of electronic excitations.