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New SrAl2B2O7:Eu2+, Mn2+phosphors for white light-emitting diodes

Authors
Journal
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
1386-1425
Publisher
Elsevier
Publication Date
Volume
83
Issue
1
Identifiers
DOI: 10.1016/j.saa.2011.08.043
Keywords
  • Optical Materials
  • X-Ray Methods
  • Luminescence

Abstract

Abstract A series of Eu 2+ and Mn 2+ co-doped SrAl 2B 2O 7 phosphors were prepared by solid-state reaction method. X-ray powder diffraction (XRD) and photoluminescence excitation and emission were employed to characterize the phosphors. The results show that energy transfers between Eu 2+and Mn 2+ ions. As the content of Ca 2+ ions in Ca x Sr 0.92− x Al 2B 2O 7:Eu 2+ 0.06, Mn 2+ 0.02 phosphors increased, the CIE coordinates decreased and close to the white color standard mandated by the National Television Standard Committee (NTSC). Meanwhile, a white LED (light-emitting diode) was fabricated by combining the Ca 0.5Sr 0.42Al 2B 2O 7:Eu 2+ 0.06, Mn 2+ 0.02 phosphors with a 370 nm InGaN chip. The color coordinate of the fabricated white LED was also close to the white color standard, indicating that the Ca 0.5Sr 0.42Al 2B 2O 7:Eu 2+ 0.06, Mn 2+ 0.02 phosphor is a promising single-host phosphor that can be used in white LEDs.

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