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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3287–3297

Tunable emission from blue to white light in single-phase Na0.34Ca(0.66-x-y)Al1.66Si2.34O8: xEu2+,yMn2+ (x = 0.07) phosphor for white-light UV LEDs

Ga-yeon Lee, Won Bin Im, Artavazd Kirakosyan, Sang Hoon Cheong, Ji Yeon Han, and Duk Young Jeon  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 3287-3297 (2013)

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A series of single-phased emission-tunable Na0.34Ca0.66Al1.66Si2.34O8:Eu2+,Mn2+ phosphors were successfully synthesized by a wet-chemical synthesis method. Photoluminescence excitation (PLE) spectra indicate that the phosphor can be efficiently excited by UV radiation from 250 to 420 nm. Also, NCASO:Eu2+,Mn2+ phosphor exhibit a broad blue emission band at 440 nm and an orange emission band at 570 nm, which originate from Eu2+ and Mn2+ ions, respectively. Therefore, overall emission color can be tuned from blue to white by increasing the concentration of Mn2+ ions in the host lattice utilizing energy transfer from Eu2+ to Mn2+ ions. This energy transfer phenomenon was demonstrated to be a resonant type through dipole-dipole interaction determined with the help of PL spectra, decay time measurement, and energy transfer efficiency of the phosphor. These results indicate that NCASO:Eu2+,Mn2+ can be a promising single-phased white-emitting phosphor for white-light UV LEDs.

© 2013 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(230.3670) Optical devices : Light-emitting diodes
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Optical Devices

Original Manuscript: November 14, 2012
Revised Manuscript: December 29, 2012
Manuscript Accepted: January 7, 2013
Published: February 1, 2013

Ga-yeon Lee, Won Bin Im, Artavazd Kirakosyan, Sang Hoon Cheong, Ji Yeon Han, and Duk Young Jeon, "Tunable emission from blue to white light in single-phase Na0.34Ca(0.66-x-y)Al1.66Si2.34O8: xEu2+,yMn2+ (x = 0.07) phosphor for white-light UV LEDs," Opt. Express 21, 3287-3297 (2013)

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