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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 4, Iss. 1 — Jan. 1, 2014
  • pp: 121–128

High-performance glass phosphor for white-light-emitting diodes via reduction of Si-Ce3+:YAG inter-diffusion

Li-Yin Chen, Wei-Chih Cheng, Chun-Chin Tsai, Yi-Chung Huang, Yen-Sheng Lin, and Wood-Hi Cheng  »View Author Affiliations


Optical Materials Express, Vol. 4, Issue 1, pp. 121-128 (2014)
http://dx.doi.org/10.1364/OME.4.000121


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Abstract

A novel Ce3+:YAG doped sodium glass (CeYDG) with low-melting temperature of 693°C and high internal quantum yield of 68% for white-light-emitting diodes (WLEDs) is demonstrated. The glass phosphor possesses glass transition temperatures of 578°C which exhibits a better thermal stability to overcome the thermal limitation of conventional Ce3+:YAG doped silicone due to low thermal stability of around 150°C. To the best of authors’ knowledge, this is the highest quantum yield yet reported for thermally stable glass phosphors. The high quantum yield is achieved by lowering the sintering temperature of 700°C for glass phosphor, which substantially reduces Si-Ce3+:YAG inter-diffusion, evidenced by high-resolution transmission electron microscopy (HRTEM). This new CeYDG with high-quantum yield is essentially beneficial to the applications for next-generation solid-state lighting in the area where high power and absolute reliability are required and where silicone simply could not stand the heat or other deteriorating factors due to its low thermal stability.

© 2013 Optical Society of America

OCIS Codes
(160.2750) Materials : Glass and other amorphous materials
(160.4670) Materials : Optical materials

ToC Category:
Glass and Other Amorphous Materials

History
Original Manuscript: October 28, 2013
Revised Manuscript: December 1, 2013
Manuscript Accepted: December 2, 2013
Published: December 16, 2013

Citation
Li-Yin Chen, Wei-Chih Cheng, Chun-Chin Tsai, Yi-Chung Huang, Yen-Sheng Lin, and Wood-Hi Cheng, "High-performance glass phosphor for white-light-emitting diodes via reduction of Si-Ce3+:YAG inter-diffusion," Opt. Mater. Express 4, 121-128 (2014)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-4-1-121


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