Luminescent nanoscale particles (quantum dots) (Zn,Cu,Ag)S:Eu3+ were synthesized during decomposition of thioacetamide complexes of metals in a methylmethacrylate medium during block polymerization under heating. The formation of quantum dots is confirmed by the corresponding band in the optical absorption spectrum of polymer compositions. Photoluminescence of PMMA/(Zn,Cu,Ag)S:Eu3+ compositions is manifested as a complex band associated with defects in the crystal structure formed when ZnS was doped with copper and silver ions, and a set of narrow bands of luminescence of Eu3+ ions. Luminescence excitation occurs as a result of inter-zone transitions and electron transitions from the valence band to the ZnS defect levels, and self-absorption of energy by Eu3+ ions. The relationship of ions Eu3+ particles of ZnS is confirmed by the dependence of the intensity of the broadband luminescence of ZnS with increasing concentration of ions Eu3+ and an increase in intensity narrow-band luminescence of ions Eu3+ as a result of energy transfer from levels of doped ZnS crystals on the energy levels of the ions Eu3+.

Photoluminescence (PL) of zinc sulfide powder synthesized and doped with Mn2+ and Eu3+ ions by the method of emerging reagents in a dodecane medium was investigated. In the absorption and excitation spectra of the PL samples ZnS and ZnS:Mn2+(Eu3+), bands corresponding to the transitions of electrons from the valence band to the conduction band and to the levels of structural defects of ZnS, as well as bands of transition of 4f – electrons of Eu3+ ions from the ground 7F0 to excited electronic states were recorded. A wide band associated with recombination processes at the energy levels of defects on the surface of ZnS particles is observed in the PL spectra. Narrow bands of PL are attributed to 5D0→7Fj and 4T1→6A1 electronic transitions in Eu3+ and Mn2+ ions. They are associated with the intra-zone glow centers formed by these ions in the ZnS structure. Energy transfer from ZnS defect levels to excited energy levels of Eu3+ ions was registered. Assumptions are made about the mutual influence of ZnS and alloying ions, as well as about the influence of synthesis conditions on the spectral properties of substances.