Influence of LiF additive and cerium doping on photoluminescence properties of polycrystalline YSO and LYSO

Nikoletta Laczai, László Kovács, Laura Kocsor, László Bencs

Research output: Contribution to journalArticle

Abstract

Polycrystalline, cerium-doped yttrium oxyorthosilicate (Y2SiO5:Ce, YSO:Ce) and lutetium yttrium oxyorthosilicate (Lu2-xYxSiO5:Ce, LYSO:Ce) scintillator materials have been synthesized and characterized. Samples have been prepared at 1400 °C with the aid of LiF flux. The initial concentration of the flux and the cerium content has strongly affected the particle size and photoluminescence (PL) intensity of the host crystal. Scanning electron microscopy (SEM) and dynamic light scattering (DLS) measurements have proven that the sizes of particles are in the range of 200−500 nm for powdered samples prepared with ≈18 mol% LiF concentration. The highest PL yield for the X2-YSO phase has been observed for host crystals with 1 mol% Ce3+. Increasing the Ce content in YSO and LYSO, as well as the Y content in LYSO samples resulted in a redshift in their PL emission spectra.

Original languageEnglish
Article number111018
JournalMaterials Research Bulletin
Volume133
DOIs
Publication statusPublished - Jan 2021

Keywords

  • A. optical materials
  • A. oxides
  • B. chemical synthesis
  • B. luminescence
  • D. defects

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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