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Synthesis and Photoluminescence of Cd1 –x(Ca,Sr)xS:Eu3+ Nanostructures in a Polyacrylate Matrix

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Inorganic Materials Aims and scope

Abstract—

Colloidal Cd1 –x(Ca,Sr)xS and Cd1 –xCaxS:Eu3+ (0 < x < 0.20) quantum dots (QDs) have been synthesized by an emerging reagent method in a methylmethacrylate (MMA) medium. The mole fraction of Eu3+ in the starting reaction mixtures was varied from 0 to 0.80 relative to the Ca2+ concentration. Using radical block polymerization of MMA, we have obtained transparent luminescent polymethylmethacrylate (PMMA) based composites: PMMA/Cd1 –x(Ca,Sr)xS and PMMA/Cd1 –xCaxS:Eu3+. Luminescence excitation in the composites is due to interband electron transitions in the CdS and electron transitions from the ground state to excited states of the Eu3+ ions. The observed broadband luminescence is due to structural defects in the CdS crystals, and narrow-band luminescence originates from 5D0 → 7Fj electron transitions of the Eu3+ ions in the bulk of the CdS crystals, in complexes on their surface, and in the bulk of the polymer matrix, independent of the semiconductor particles. The position and intensity of the observed spectral bands depend on the composition and concentration of the components, excitation wavelength, and other factors.

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Authors and Affiliations

  1. Altai State University, pr. Lenina 61, 656049, Barnaul, Russia

    V. P. Smagin & A. G. Skachkov

  2. National Research Tomsk State University, pr. Lenina 36, 634050, Tomsk, Russia

    A. A. Biryukov & N. S. Eremina

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  1. V. P. Smagin
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  2. A. A. Biryukov
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  3. N. S. Eremina
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Smagin, V.P., Biryukov, A.A., Eremina, N.S. et al. Synthesis and Photoluminescence of Cd1 –x(Ca,Sr)xS:Eu3+ Nanostructures in a Polyacrylate Matrix. Inorg Mater 56, 557–566 (2020). https://doi.org/10.1134/S002016852006014X

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