Influence of Temperature on the Luminescence Properties of MgAl2O4:Dy3+ Ceramics Synthesized by Spark Plasma Sintering

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Abstract

Abstract: Transparent MgAl2O4:Dy3+ ceramic samples were synthesized by spark plasma sintering. Their optical properties, photo- and cathodoluminescence, the luminescence decay kinetics, and the effect of temperature on spectral and kinetic characteristics of luminescence were studied. The luminescence of Dy3+ ions (458 nm (4I15/25H15/2), 480 nm (4F9/26H15/2), 573 nm (4F9/26H13/2), 665 nm (4F9/26H11/2), and 750 nm (4F9/26H9/2)), impurity Cr3+ ions (2Eg4A2g), and intrinsic defects (F+-centers, 460 nm) was detected. Thermal quenching of luminescence in the visible spectral range was observed as the temperature varied from 100 to 300 K. It is demonstrated that the patterns of quenching for impurity and intrinsic centers differ in MgAl2O4:Dy3+ ceramics. The mechanisms of thermal quenching are discussed.

Original languageEnglish
Pages (from-to)1829-1834
Number of pages6
JournalPhysics of the Solid State
Volume61
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

Keywords

  • luminescent ceramics
  • magnesium aluminate spinel
  • rare-earth elements
  • Spark Plasma Sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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