Luminescence Spectra of Poly(methylmethacrylate)/ZnS:Eu(III),Tb(III) Composites

• Published in: Inorganic materials Vol. 54; no. 2; pp. 103 - 110
• Main Authors: Smagin, V. P., Eremina, N. S., Leonov, M. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.02.2018; Springer Nature B.V
• Subjects: ACETAMIDE; ACETATES; Chemical industry; Chemical synthesis; Chemistry; Chemistry and Materials Science; COMPOSITE MATERIALS; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electron transitions; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; EUROPIUM; EUROPIUM IONS; IMPURITIES; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; LUMINESCENCE; Materials Science; METHACRYLIC ACID ESTERS; PMMA; POLYMERIZATION; Polymethyl methacrylate; RECOMBINATION; SALTS; SOLUTIONS; SPECTRA; TERBIUM; TERBIUM IONS; WAVELENGTHS; Zinc sulfide; ZINC SULFIDES; quantum dots; poly(methyl methacrylate); luminescence; zinc sulfide; optically transparent composites; lanthanides
• ISSN: 0020-1685; 1608-3172
• DOI: 10.1134/S0020168518020139

Colloidal zinc sulfide solutions have been prepared by reacting zinc trifluoroacetate and thioacetamide in methyl methacrylate as a reaction medium, and europium and terbium salts have been added to the solution. Using methyl methacrylate block polymerization, we have synthesized PMMA/ZnS, PMMA/ZnS:Eu(III), PMMA/ZnS:Tb(III), and PMMA/ZnS:Eu(III),Tb(III) composites. The luminescence of the composites is due to charge recombination at energy levels of structural defects and impurities in ZnS and also to 5 D 0 → 7 F j and 5 D 4 → 7 F j electronic transitions of the Eu 3+ and Tb 3+ ions. It depends on the composition and structure of the composites, excitation wavelength, and other factors. The mutual effects of the ZnS and the Eu 3+ and Tb 3+ ions show up as changes in the position and relative intensity of luminescence bands in the spectra of the composites.