The effect of Ce3+ concentration and heat treatment on the luminescence efficiency of YAG phosphor

Damir Valiev, Tao Han, Vitaly Vaganov, Sergey Stepanov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Y3Al5O12 (YAG) phosphor powders doped with Ce3+ at different concentrations (YAG:xCe, x = 0.02, 0.04, 0.06, 0.08, 0.1 wt%) were synthesized by the solid-state reaction method with the addition of BaF2 flux. The effects of cerium concentration and heat treatment on the luminescence efficiency of the YAG:Ce3+ phosphor were investigated. The introduction of Ce3+ ions leads to an increase in luminescent intensity of the YAG phosphor at 560 nm. The band at 530 nm is attributed to Ce3+ ions (optical transitions from the 4f–5d excited state). We assumed that such an increase in the luminescent intensity is due to the ability of Ce3+ to act as a luminescence sensitizer of intrinsic defects in YAG phosphor. The analysis of luminescence decay kinetics in the investigated samples has shown that the decay time in all samples does not differ significantly and equals τ ≈ 60 ± 3 ns. We showed experimentally that increasing the luminescence intensity has an effect observed with relatively low temperature treatment (T = 400 K). The nature of possible luminescence centers and the effect of low heat treatment on the luminescence properties of the powders are discussed.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume116
DOIs
Publication statusPublished - 1 May 2018

Fingerprint

Phosphors
yttrium-aluminum garnet
phosphors
Luminescence
heat treatment
Heat treatment
luminescence
Powders
luminous intensity
Ions
Cerium
Optical transitions
decay
cerium
Solid state reactions
optical transition
Excited states
ions
Fluxes
solid state

Keywords

  • Defects
  • Energy efficiency
  • Heat treatment
  • Luminescent properties
  • YAG:Ce phosphors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

The effect of Ce3+ concentration and heat treatment on the luminescence efficiency of YAG phosphor. / Valiev, Damir; Han, Tao; Vaganov, Vitaly; Stepanov, Sergey.

In: Journal of Physics and Chemistry of Solids, Vol. 116, 01.05.2018, p. 1-6.

Research output: Contribution to journalArticle

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