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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 3 — Jan. 30, 2012
  • pp: 2761–2771

Yellow-emitting γ-Ca2SiO4:Ce3+, Li+ phosphor for solid-state lighting: luminescent properties, electronic structure, and white light-emitting diode application

Ho Seong Jang, Hyun You Kim, Yang-Soo Kim, Hyuck Mo Lee, and Duk Young Jeon  »View Author Affiliations


Optics Express, Vol. 20, Issue 3, pp. 2761-2771 (2012)
http://dx.doi.org/10.1364/OE.20.002761


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Abstract

A new yellow-emitting γ-Ca2SiO4:Ce3+,Li+ phosphor was synthesized via a solid-state reaction. The phosphor showed a strong yellow emission with a wide bandwidth of 135.4 nm under blue light excitation. Absorption and photoluminescence measurements and density functional theory calculations suggest that the luminescence of the phosphor can be attributed primarily to the transitions of 5d→4f (2F7/2 and 2F5/2) of Ce3+ ions occupying Ca(1) sites in the host crystal. White light-emitting diodes (LEDs) were fabricated by combining this phosphor with a blue LED, and excellent white light with a high color rendering index of 86 was created owing to the wide emission bandwidth of the phosphor.

© 2012 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(230.3670) Optical devices : Light-emitting diodes
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Optical Devices

History
Original Manuscript: July 12, 2011
Revised Manuscript: September 13, 2011
Manuscript Accepted: September 13, 2011
Published: January 23, 2012

Citation
Ho Seong Jang, Hyun You Kim, Yang-Soo Kim, Hyuck Mo Lee, and Duk Young Jeon, "Yellow-emitting γ-Ca2SiO4:Ce3+, Li+ phosphor for solid-state lighting: luminescent properties, electronic structure, and white light-emitting diode application," Opt. Express 20, 2761-2771 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-3-2761


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