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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 4 — Apr. 1, 2014
  • pp: 649–655

Luminescence properties of YAG:Ce, Gd phosphors synthesized under vacuum condition and their white LED performances

Hongling Shi, Chen Zhu, Jiquan Huang, Jian Chen, Dongchuan Chen, Wenchao Wang, Fangyu Wang, Yongge Cao, and Xuanyi Yuan  »View Author Affiliations


Optical Materials Express, Vol. 4, Issue 4, pp. 649-655 (2014)
http://dx.doi.org/10.1364/OME.4.000649


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Abstract

Modified YAG:Ce, Gd phosphors were synthesized by vacuum solid-state reaction. With the increase of Gd3+ concentration, the emission spectra of YAG:Ce, Gd phosphors shifted greatly to longer wavelength. At 400 K, YAG:Ce, Gd phosphors with 20 at.% Gd3+ could maintain 78% of room temperature intensity. Within the maximum junction temperature of a high brightness LED (around 400 K), the color coordinates of phosphors changed very little. In addition, white LEDs with a color rendering index of 82, luminous efficiency of 109 lm/W and color temperature of 5656 K were achieved by using optimized YAG:Ce, Gd phosphors.

© 2014 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
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Fluorescent and Luminescent Materials

History
Original Manuscript: October 2, 2013
Revised Manuscript: January 5, 2014
Manuscript Accepted: January 11, 2014
Published: March 7, 2014

Citation
Hongling Shi, Chen Zhu, Jiquan Huang, Jian Chen, Dongchuan Chen, Wenchao Wang, Fangyu Wang, Yongge Cao, and Xuanyi Yuan, "Luminescence properties of YAG:Ce, Gd phosphors synthesized under vacuum condition and their white LED performances," Opt. Mater. Express 4, 649-655 (2014)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-4-4-649


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