Synthesis and photoluminescence of nanostructures based on zinc, cadmium, and manganese sulfides in a polyacrylate matrix

Photoluminescence of nanoscale structures based on zinc, cadmium and manganese sulfides depending on the conditions of synthesis and doping in the medium (poly)methylmethacrylate (PMMA). Photoluminescence excitation is associated with interband transitions of electrons in the semiconductor structures, absorption of optical radiation energy by defects in the crystal structure, as well as with the transfer of energy to the excited energy levels of Mn$^{2+}$ ions. Luminescence occurs as a result of recombination processes at the levels of defects in the structure of the surface of particles and $^4$T$_1\to^6$A$_{1}$ transitions between the proper energy levels of Mn$^{2+}$ ions. Based on changes in the photoluminescence spectra and photoluminescence excitation of PMMA/(Zn,Cd,Mn)S compositions, assumptions are made about the structure of particles. It is shown that their photoluminescence is affected by the distribution of Mn$^{2+}$ ions in the structure of layers and on the surface of particles.