Solid-solution red phosphors for white LEDs

Gwan Hyoung Lee, Shinhoo Kang

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Solid solutions of Eu3-doped metal tungstate and molybdate phosphors were synthesized by solid-state reactions. The crystal structure of the solid-solution phosphors was determined to be tetragonal with a space group of I41/c. The red-emitting solid-solution phosphors exhibited a broad absorption band in the range 220340 nm and sharp excitation peaks in the near UV to green region. The emission intensities of the solid-solution phosphors were enhanced due to the stiff lattices, as a result of the ordered distribution of cations and anions according to differences in ionic size. The increase in the energy transfer is discussed in terms of metalligand distances, ionization potential of Mo and the relatively large overlap between the excitation and emission spectra. Such solid-solution phosphors with a bright red emission intensity, relatively short decay time and appropriate color chromaticity have potential for use as red-emitting materials for white LEDs.

Original languageEnglish
Pages (from-to)2582-2588
Number of pages7
JournalJournal of Luminescence
Volume131
Issue number12
DOIs
Publication statusPublished - 2011 Dec 1

Fingerprint

Phosphors
phosphors
Light emitting diodes
Solid solutions
solid solutions
light emitting diodes
tungstates
Ionization potential
molybdates
Energy Transfer
Solid state reactions
ionization potentials
Energy transfer
excitation
Anions
Cations
Absorption spectra
emission spectra
Color
Crystal structure

All Science Journal Classification (ASJC) codes

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

Cite this

Lee, Gwan Hyoung ; Kang, Shinhoo. / Solid-solution red phosphors for white LEDs. In: Journal of Luminescence. 2011 ; Vol. 131, No. 12. pp. 2582-2588.
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Solid-solution red phosphors for white LEDs. / Lee, Gwan Hyoung; Kang, Shinhoo.

In: Journal of Luminescence, Vol. 131, No. 12, 01.12.2011, p. 2582-2588.

Research output: Contribution to journalArticle

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