KBaPO4:Ln (Ln=Eu, Tb, Sm) phosphors for UV excitable white light-emitting diodes

C. C. Lin, Y. S. Tang, S. F. Hu, R. S. Liu

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

This letter reports the novel three emission bands based on phosphate host matrix, KBaPO4 doped with Eu2+, Tb3+, and Sm3+ for white light-emitting diodes (LEDs). The phosphors were synthesized by solid-state reaction and thermal stability was elucidated by measuring photoluminescence at higher temperatures. Eu2+-doped KBaPO4 phosphor emits blue luminescence with a peak wavelength at 420 nm under maximum near-ultraviolet excitation of 360 nm. Tb3+-doped KBaPO4 phosphor emits green luminescence with a peak wavelength at 540 nm under maximum near-ultraviolet excitation of 370 nm. Sm3+-doped KBaPO4 phosphor emits orange-red luminescence with a peak wavelength at 594 nm under maximum near-ultraviolet excitation of 400 nm. The thermal stabilities of KBaPO4:Ln (Ln=Eu2+, Tb3+, Sm3+), in comparison to commercially available YAG:Ce3+ phosphor were found to be higher in a wide temperature range of 25-300 °C.

Original languageEnglish
Pages (from-to)1682-1684
Number of pages3
JournalJournal of Luminescence
Volume129
Issue number12
DOIs
Publication statusPublished - Dec 1 2009
Externally publishedYes

Keywords

  • KBaPO
  • Light-emitting diodes
  • Phosphor

ASJC Scopus subject areas

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

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