Synthesis and photoluminescence properties of new garnet-type red-emitting Li7La3- xZr2O12:xEu3+ phosphors

K. Park, D. A. Hakeem, D. H. Kim, G. W. Jung, S. W. Kim

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The structural and photoluminescence (PL) properties of as-synthesized and aged garnet-type Li7La3- xZr2O12:xEu3+ (0.02 ≤ x ≤ 0.10) phosphors for white light-emitting diode applications were systematically investigated. Li7La3Zr2O12 oxides satisfied the criteria, proposed by F. C. Hawthorne, for the formation of garnet structure. Rietveld refinement results showed that the as-synthesized Li7La3- xZr2O12:xEu3+ phosphors formed a tetragonal crystal structure (I41/acd space group) and emitted efficient red light. The aging of the Li7La3- xZr2O12:xEu3+ phosphors induced a gradual transition from the tetragonal to the cubic structure and formed a secondary phase Li2CO3, which yielded a substantial decrease in PL excitation and emission intensities.

Original languageEnglish
Pages (from-to)92-98
Number of pages7
JournalScripta Materialia
Volume179
DOIs
Publication statusPublished - 2020 Apr 1
Externally publishedYes

Keywords

  • Aging
  • Crystalline oxides
  • Optical properties
  • Phosphors
  • Powder processing

ASJC Scopus subject areas

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

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