Materials (Sep 2023)

The Synthesis, Structure, and Luminescent Properties of TmMgB<sub>5</sub>O<sub>10</sub> Crystals

  • Elena A. Volkova,
  • Victor V. Maltsev,
  • Alexander M. Antipin,
  • Dina V. Deyneko,
  • Ivan V. Nikiforov,
  • Dmitry A. Spassky,
  • Ekaterina I. Marchenko,
  • Diana D. Mitina,
  • Vladimir L. Kosorukov,
  • Vasiliy O. Yapaskurt,
  • Daniil A. Naprasnikov,
  • Elizaveta V. Koporulina

DOI
https://doi.org/10.3390/ma16186084
Journal volume & issue
Vol. 16, no. 18
p. 6084

Abstract

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TmMgB5O10 spontaneous crystals were synthesized via the flux-growth technique from a K2Mo3O10-based solvent. The crystal structure of the compound was solved and refined within the space group P21/n. The first principles calculations of the electronic structure reveal that TmMg-pentaborate with an ideal not defected crystal structure is an insulator with an indirect energy band gap of approximately 6.37 eV. Differential scanning calorimetry measurements and powder X-ray diffraction studies of heat-treated solids show that TmMgB5O10 is an incongruent melting compound. A characteristic band of the Tm3+ cation corresponding to the 3H6 → 1D2 transition is observed in the photoluminescence excitation spectra of TmMg-borate. The as-obtained crystals exhibit intense blue emission with the emission peaks centered at 455, 479, 667, and 753 nm. The most intensive band corresponds to the 1D2 → 3F4 transition. TmMgB5O10 solids demonstrate the thermal stability of photoluminescence.

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