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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 22 — Aug. 1, 2010
  • pp: 4202–4206

Intense violet-blue-emitting Ba 2 Al B 4 O 9 Cl : Eu 2 + phosphors for applications in fluorescent lamps and ultraviolet-light-emitting diodes

Te-Wen Kuo, Chien-Hao Huang, and Teng-Ming Chen  »View Author Affiliations

Applied Optics, Vol. 49, Issue 22, pp. 4202-4206 (2010)

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We synthesized a violet-blue phosphor Ba 2 Al B 4 O 9 Cl : Eu 2 + with a solid-state reaction. The excitation and emission spectra of this phosphor showed that all were broadband due to 4 f 7 4 f 6 d 1 transitions of Eu 2 + . The phosphors with different Eu 2 + concentrations presented violet-blue luminescence for ultraviolet [(UV) 250 390 nm ] excitation. The optimum concentration of Eu 2 + in Ba 2 Al B 4 O 9 Cl : Eu 2 + is determined to be 6 mol . % . The luminous efficiency was found to be 8.1 lm / W for the violet-blue fluorescent lamp and 3.2 lm / W for the violet-blue phosphor-converted light-emitting diode, respectively. Ba 2 Al B 4 O 9 Cl : Eu 2 + would be a promising phosphor for converting the UV radiation to violet-blue emission for a novel high light-conversion efficiency phototherapy illuminator.

© 2010 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials
(230.3670) Optical devices : Light-emitting diodes

ToC Category:

Original Manuscript: March 11, 2010
Revised Manuscript: April 29, 2010
Manuscript Accepted: June 29, 2010
Published: July 27, 2010

Te-Wen Kuo, Chien-Hao Huang, and Teng-Ming Chen, "Intense violet-blue-emitting Ba2AlB4O9Cl:Eu2+ phosphors for applications in fluorescent lamps and ultraviolet-light-emitting diodes," Appl. Opt. 49, 4202-4206 (2010)

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