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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 3 — Feb. 1, 2009
  • pp: 301–303

Enhancement of flip-chip white light-emitting diodes with a one-dimensional photonic crystal

Le Wang, Pei-Fu Gu, and Shang-Zhong Jin  »View Author Affiliations


Optics Letters, Vol. 34, Issue 3, pp. 301-303 (2009)
http://dx.doi.org/10.1364/OL.34.000301


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Abstract

A design for a one-dimensional photonic crystal (1D PhC) based on thin-film optics is proposed to improve the light extraction efficiency of phosphor-converted flip-chip white-light-emitting diodes (LEDs). The 1D PhC thin film consisting of alternating layers of Ti O 2 and Si O 2 is added between a phosphor layer and sapphire substrate of the LEDs. Monte Carlo simulation method is introduced to analyze performance of the proposed LEDs with a 1D PhC. Results show that the light extraction efficiency is higher than that of conventional LEDs by 16%, and the correlated color temperature becomes lower, below 4000 K . These improvements are attributed to the efficient extraction of backscattered light from the phosphor layer by using the 1D PhC thin film.

© 2009 Optical Society of America

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optical Devices

History
Original Manuscript: September 17, 2008
Revised Manuscript: December 5, 2008
Manuscript Accepted: December 6, 2008
Published: January 26, 2009

Citation
Le Wang, Pei-Fu Gu, and Shang-Zhong Jin, "Enhancement of flip-chip white light-emitting diodes with a one-dimensional photonic crystal," Opt. Lett. 34, 301-303 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-3-301


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