Synthesis and crystal structure of a new aluminum-silicon-nitride phosphor containing boron, Ba5B2Al4Si32N52: Eu

Fumitaka Yoshimura, Hisanori Yamane, Makoto Nagasako

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Single crystals of Ba5B2Al4Si32N52:Eu were grown on the wall of a boron nitride crucible by heating a starting mixture of binary nitrides at 2050 °C and a N2 pressure of 0.85 MPa. The fundamental reflections of X-ray diffraction (XRD) for the crystals were indexed with triclinic cell parameters, a=9.7879(11) Å, b=9.7920(11) Å, c=12.7226(15) Å, α=96.074(4)°, β=112.330(3)°, and γ=94.080(4)°. Streak lines were observed between the fundamental reflections in the direction of the c* axis in the oscillation XRD images and selected area electron diffraction (SAED) patterns, indicating stacking faults in the structure. The atomic images of stacking faults with a slip system of (0 0 1)[−1 1 0]/3, and displacement of a Ba atom layer with (0 0 1)[−1 −1 0]/6 were observed with a scanning transmission electron microscope (STEM). The models of the basic (normal-stacking) structure with space group P1 and local structures of the stacking faults are herein presented. The single crystals emitted blue light with a peak wavelength of 472 nm and a full width at half maximum of 78 nm under 365 nm excitation.

Original languageEnglish
Pages (from-to)43-49
Number of pages7
JournalJournal of Solid State Chemistry
Volume251
DOIs
Publication statusPublished - 2017 Jul 1

Keywords

  • Barium boron aluminum silicon nitride
  • Crystal structure elucidation
  • Eu luminescence
  • Stacking faults

ASJC Scopus subject areas

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

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