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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 14 — Jul. 15, 2010
  • pp: 2382–2384

Two-color emitting of Ce 3 + and Tb 3 + co-doped Ca La Ga 3 S 6 O for UV LEDs

Gongguo Zhang, Jing Wang, Yan Chen, and Qiang Su  »View Author Affiliations


Optics Letters, Vol. 35, Issue 14, pp. 2382-2384 (2010)
http://dx.doi.org/10.1364/OL.35.002382


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Abstract

An intense bluish-green phosphor, Ca La Ga 3 S 6 O : Ce 3 + , Tb 3 + , is developed. The photoluminescence excitation and emission spectra, the lifetime, and the concentration effect are investigated. The results show that an efficient nonradiative energy transfer from Ce 3 + to Tb 3 + occurs and its efficiency is about 11%. Although the efficiency is not high enough, these results demonstrate that a Tb 3 + ion with low 4 f 4 f absorption efficiency in the near-UV [(n)-UV] region can play the role of activator in a narrow green-emitting phosphor. This is potentially useful in (n)-UV ( 380 420 nm ) GaN-based LEDs through efficient energy feeding by allowing 4 f 5 d absorption of Ce 3 + with high oscillator strength.

© 2010 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials
(250.5230) Optoelectronics : Photoluminescence
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Materials

History
Original Manuscript: May 17, 2010
Revised Manuscript: June 3, 2010
Manuscript Accepted: June 11, 2010
Published: July 8, 2010

Citation
Gongguo Zhang, Jing Wang, Yan Chen, and Qiang Su, "Two-color emitting of Ce3+ and Tb3+ co-doped CaLaGa3S6O for UV LEDs," Opt. Lett. 35, 2382-2384 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-14-2382

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