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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 14 — Jul. 15, 2014
  • pp: 4084–4087

Control of chromaticity by phosphor in glasses with low temperature sintered silicate glasses for LED applications

Yl Kwon Lee, Yoon Hwa Kim, Jong Heo, Won Bin Im, and Woon Jin Chung  »View Author Affiliations


Optics Letters, Vol. 39, Issue 14, pp. 4084-4087 (2014)
http://dx.doi.org/10.1364/OL.39.004084


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Abstract

Phosphor-in-glass (PiG) color converters for LED applications were fabricated with a mixture of phosphors, Y3Al5O12:Ce3+ (yellow) and CaAlSiN3:Eu2+ (red). The low sintering temperature (550°C) of SiO2Na2ORO (R=Ba, Zn) glass powder enabled the inclusion of CaAlSiN3:Eu2+ (red) phosphor which cannot be embedded with conventional glass powders for PiGs. By simply varying the mixing ratio of glass to phosphors as well as the ratio of yellow to red phosphors, the facile control of the CIE chromaticity coordinates and correlated color temperature of the LED following the Planckian locus has been achieved. Phosphors were well distributed within the glass matrix without noticeable reactions, preserving the enhanced thermal quenching property of the PiG compared to those with silicone resins, for LEDs.

© 2014 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.2750) Materials : Glass and other amorphous materials
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Materials

History
Original Manuscript: May 2, 2014
Revised Manuscript: May 27, 2014
Manuscript Accepted: June 7, 2014
Published: July 3, 2014

Citation
Yl Kwon Lee, Yoon Hwa Kim, Jong Heo, Won Bin Im, and Woon Jin Chung, "Control of chromaticity by phosphor in glasses with low temperature sintered silicate glasses for LED applications," Opt. Lett. 39, 4084-4087 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-14-4084


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