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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 8 — Aug. 1, 2014
  • pp: 1535–1544

Site occupancy and photoluminescence of Sm3+ in KSr4(BO3)3:Sm3+ phosphors

Li Wu, Minyuan Ji, Hongrun Wang, Yongfa Kong, and Yi Zhang  »View Author Affiliations

Optical Materials Express, Vol. 4, Issue 8, pp. 1535-1544 (2014)

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The phosphors of Sm3+ activated KSr4(BO3)3 are synthesized through a solid state reaction. The site occupancy of Sm3+ in KSr4(BO3)3:Sm3+ was studied by Rietveld analysis of the X-ray powder diffraction patterns. Sm3+ ions are inclined to occupy 8c (Sr2) and 4a (Sr3) sites in the structure of KSr4(BO3)3 according to the refinement results. The luminescence properties of Sm3+ activated KSr4(BO3)3 have been investigated and strong reddish orange emitting color is found. The phenomenon of concentration quenching can be observed with the increasing of Sm3+ concentration. The nonradiative concentration quenching among two nearest Sm3+ centers occurs via electric multipolar interactions based on the Dexter theory. Fluorescence lifetime of KSr4(BO3)3:Sm3+ is 0.69, 0.74, 0.70, and 0.69 ms for the transition of 4G5/2 to 6HJ (J = 5/2, 7/2, 9/2, 11/2) respectively and the critical distance is 17.6 Å.

© 2014 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Fluorescent and Luminescent Materials

Original Manuscript: June 3, 2014
Revised Manuscript: June 28, 2014
Manuscript Accepted: June 30, 2014
Published: July 3, 2014

Li Wu, Minyuan Ji, Hongrun Wang, Yongfa Kong, and Yi Zhang, "Site occupancy and photoluminescence of Sm3+ in KSr4(BO3)3:Sm3+ phosphors," Opt. Mater. Express 4, 1535-1544 (2014)

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