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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 9 — May. 1, 2014
  • pp: 2691–2694

Red emission of additional Pr3+ and adjusting effect of additional Mg2+ in Ca3Sc2Si3O12:Ce3+, Mn2+ phosphor

Jun Qiao, Jiahua Zhang, Xia Zhang, Zhendong Hao, Yongfu Liu, and Guohui Pan  »View Author Affiliations


Optics Letters, Vol. 39, Issue 9, pp. 2691-2694 (2014)
http://dx.doi.org/10.1364/OL.39.002691


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Abstract

In this Letter, we report the addition of Pr3+ and Mg2+ in CSS:Ce3+, Mn2+ phosphor for improving the performances of white light-emitting diodes (LEDs). The additional trivalent Pr3+ will occupy the Ca2+ site in this host like the situation of Ce3+, its concentration can be enhanced by the addition of Mg2+ in Sc3+ site due to the substitution of Mg2+ for Sc3+ can compensate the charge mismatch between Pr3+ and Ca2+. Based on the efficient Ce3+Pr3+ and Mn2+Pr3+ energy transfers (ETs) and the compensation effect of Mg2+, the additional Pr3+ in our present phosphors exhibits an intense red-emission around 610 nm, which is significant for enhancing the color rendering property. In addition, we also find that the additional Mg2+ in Sc3+ site can markedly adjust the photoluminescence (PL) spectrum shape of our phosphor by controlling the distribution of Mn2+ at Ca2+ and Sc3+ sites. A new tunable full-color emission is obtained via the ETs (Ce3+Mn2+, Ce3+Pr3+ and Mn2+Pr3+) and the adjusting effect of Mg2+ in our present phosphors. Finally, a white LED with higher color rendering index of 90, lower correlated color temperature of 4980 K, and chromaticity coordinates of (0.34, 0.31) was obtained by combining the single CSS:0.08Ce3+, 0.01Pr3+, 0.3Mn2+, 0.2Mg2+ phosphor with a blue-emitting InGaN LED chip.

© 2014 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.4670) Materials : Optical materials
(230.3670) Optical devices : Light-emitting diodes
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Materials

History
Original Manuscript: February 26, 2014
Revised Manuscript: March 27, 2014
Manuscript Accepted: March 31, 2014
Published: April 24, 2014

Citation
Jun Qiao, Jiahua Zhang, Xia Zhang, Zhendong Hao, Yongfu Liu, and Guohui Pan, "Red emission of additional Pr3+ and adjusting effect of additional Mg2+ in Ca3Sc2Si3O12:Ce3+, Mn2+ phosphor," Opt. Lett. 39, 2691-2694 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-9-2691

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