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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 25 — Dec. 5, 2011
  • pp: 25593–25601

2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes

Hoo Keun Park, Jeong Rok Oh, and Young Rag Do  »View Author Affiliations

Optics Express, Vol. 19, Issue 25, pp. 25593-25601 (2011)

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This paper reports the optical effects of a two-dimensional (2D) SiNx photonic crystal layer (PCL) on Y3Al5O12:Ce3+ (YAG:Ce) yellow ceramic plate phosphor (CPP) in order to enhance the forward emission of YAG:Ce CPP-capped high-power white light-emitting diodes (LEDs). By adding the 2D SiNx PCL with a 580 nm lattice constant, integrated yellow emission was improved by a factor of 1.72 compared to that of a conventional YAG:Ce CPP capped on a blue LED cup. This enhanced forward yellow emission is attributed to increased extraction of yellow emission light and improved absorption of blue excitation light through Bragg scattering and/or the leaky modes produced by the 2D PCLs. The introduction of 2D PCL can also reduce the wide variation of optical properties as a function of both ambient temperature and applied current, compared to those of a high-power YAG:Ce CPP-capped LED.

© 2011 OSA

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(230.3670) Optical devices : Light-emitting diodes
(220.4241) Optical design and fabrication : Nanostructure fabrication
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Optical Devices

Original Manuscript: August 10, 2011
Revised Manuscript: November 17, 2011
Manuscript Accepted: November 18, 2011
Published: November 30, 2011

Hoo Keun Park, Jeong Rok Oh, and Young Rag Do, "2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes," Opt. Express 19, 25593-25601 (2011)

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