Low temperature quenching and high efficiency Tm3+, La 3+ or Tb3+ co-doped CaSc2O4:Ce 3+ phosphors for light-emitting diodes

Yibo Chen*, Kok Wai CHEAH, Menglian Gong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Low temperature quenching and high efficiency CaSc2O 4:Ce3+ (CSO:Ce3+) phosphors co-doped with Tm3+, La3+ and Tb3+ ions were prepared by a solid state method and the phase-forming, morphology, luminescence and application properties of these phosphors were investigated. The results showed that co-doping of Tm3+, La3+ and Tb3+ ions can improve the luminescence properties and decrease temperature quenching of CSO:Ce3+ phosphor remarkably. High efficiency green-light-emitting diodes were fabricated with the prepared phosphors and InGaN blue-emitting (∼460 nm) chips. The good performances of the green-light-emitting LEDs made from co-doped CSO:Ce3+ phosphors confirm the luminescence enhancement and indicate that Tm3+, La3+ and Tb 3+ co-doped CSO:Ce3+ phosphors are suitable candidates for the fabrication of high efficiency white LEDs.

Original languageEnglish
Pages (from-to)1770-1775
Number of pages6
JournalJournal of Luminescence
Volume131
Issue number8
DOIs
Publication statusPublished - Aug 2011

Scopus Subject Areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

User-Defined Keywords

  • CaScO:Ce
  • Co-doping
  • LED
  • Phosphor

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