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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 4, Iss. 1 — Jan. 1, 2014
  • pp: 16–28

Tunable white-light emission in single-phase Ca9Gd(VO4)7:Tm3+, Eu3+

Ling Li, Hyeon Mi Noh, Byung Kee Moon, Jung Hyun Jeong, Byung Chun Choi, and Xiaoguang Liu  »View Author Affiliations


Optical Materials Express, Vol. 4, Issue 1, pp. 16-28 (2014)
http://dx.doi.org/10.1364/OME.4.000016


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Abstract

A series of Tm3+ and/or Eu3+ doped Ca9Gd(VO4)7 single composition phosphors were synthesized by a solid state reaction method, and their luminescence properties were investigated. Tm3+ and Eu3+ co-doped Ca9Gd(VO4)7 phosphors showed a blue with the peak at 477 nm and red with the stronger peak at 620 nm dual emission bands under the UV excitation, which originates from the f-f transitions of Tm3+ and Eu3+ ions, respectively. The energy transfer from O2--V5+ CT (charge transfer) energy to Tm3+ and Eu3+ ions as well as the energy transfer from Tm3+ to Eu3+ ions were investigated. The photoluminescence intensity ratio of blue and red emission could be tuned by adjusting the concentration of Tm3+ and Eu3+ ions and as a result the emission color varies from blue to white to red. The white-light emission is realized in single phased phosphor of Ca9Gd(VO4)7:Tm3+, Eu3+ by combining the Tm3+-emission and the Eu3+-emission.

© 2013 Optical Society of America

OCIS Codes
(160.4670) Materials : Optical materials
(160.4760) Materials : Optical properties
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Fluorescent and Luminescent Materials

History
Original Manuscript: October 21, 2013
Revised Manuscript: November 21, 2013
Manuscript Accepted: November 21, 2013
Published: December 2, 2013

Citation
Ling Li, Hyeon Mi Noh, Byung Kee Moon, Jung Hyun Jeong, Byung Chun Choi, and Xiaoguang Liu, "Tunable white-light emission in single-phase Ca9Gd(VO4)7:Tm3+, Eu3+," Opt. Mater. Express 4, 16-28 (2014)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-4-1-16


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