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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 8 — Apr. 15, 2013
  • pp: 1346–1348

Thermally stable white-emitting single composition Na(Sr,Ba)PO4:Eu2+, Mn2+ phosphor for near-ultraviolet-pumped light-emitting diodes

Sungho Choi, Young Jun Yun, Sue Jin Kim, and Ha-Kyun Jung  »View Author Affiliations

Optics Letters, Vol. 38, Issue 8, pp. 1346-1348 (2013)

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Eu2+ and Mn2+ codoped, white-emitting Na(Sr,Ba)PO4 phosphors are prepared, and their emission properties, especially for thermal stability, are thoroughly investigated. The thermal quenching and Eu2+/Mn2+ energy transfer efficiency are totally different in the ratio of alkaline earth metals in host composition, NaBaPO4, Na(Sr0.5Ba0.5)PO4, and NaSrPO4, respectively. Furthermore, by using near-ultraviolet light-emitting diodes (LEDs) and the corresponding Na(Sr0.5Ba0.5)PO4:Eu2+, Mn2+ phosphor as light converters, we demonstrate a bright and thermally stable white-emitting LED. The resultant LED exhibits a warm white light [4900K, CIE coordinates of (0.33, 0.31)] with excellent thermal and hydrolytic stabilities comparable to those of commercially available ones, Y3Al5O12:Ce3+ and BaMg2Al16O27:Eu2+. The proposed composition, with its efficient energy transfer, could enable Eu2+ and Mn2+ codoped Na(Sr,Ba)PO4 to be a promising single component phosphor for cost-effective white-emitting LEDs.

© 2013 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials

ToC Category:

Original Manuscript: February 25, 2013
Revised Manuscript: March 13, 2013
Manuscript Accepted: March 14, 2013
Published: April 12, 2013

Sungho Choi, Young Jun Yun, Sue Jin Kim, and Ha-Kyun Jung, "Thermally stable white-emitting single composition Na(Sr,Ba)PO4:Eu2+, Mn2+ phosphor for near-ultraviolet-pumped light-emitting diodes," Opt. Lett. 38, 1346-1348 (2013)

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