Novel red-emitting color-tunable phosphors BaBi2-xEuxB2O7 (x = 0–0.40): Study of the crystal structure and luminescence

Andrey P. Shablinskii, Alexei V. Povolotskiy, Ilya E. Kolesnikov, Yaroslav P. Biryukov, Rimma S. Bubnova, Margarita S. Avdontceva, Sofya V. Demina, Stanislav K. Filatov

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The novel polycrystalline phosphors BaBi2-xEuxB2O7 (x ​= ​0, 0.05, 0.10, 0.15, 0.20, 0.30, 0.40) were obtained by crystallization from glass-ceramics. Single-crystal X-ray diffraction experiments were provided for the x ​= ​0.10, 0.20 and 0.40 samples in order to investigate a distribution of the Eu3+ ions over cation sites. It is shown that the Eu3+ ions substitute the Bi3+ ones in the M1 and M2 sites. Luminescent properties of the BaBi2-xEuxB2O7 phosphors were investigated for the first time. The optimal concentration of the Eu3+ ions was revealed for the sample with x ​= ​0.40, after that an immiscibility of the BaBi2-xEuxB2O7 solid solutions occurs, which is of a structure-dependent nature. Increase of the Eu3+ content leads to a gradual change of chromaticity from light red to orange-red/red. It is expected that the BaBi2B2O7:Eu3+ phosphors can be used as red-emitting ones under LED excitation.

Original languageEnglish
Article number122837
Number of pages8
JournalJournal of Solid State Chemistry
Volume307
DOIs
StatePublished - Mar 2022

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Keywords

  • Area of immiscibility
  • Barium-bismuth borate
  • Color-tunable phosphors
  • Crystal structure
  • Eu
  • Luminescence

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