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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 2 — Jan. 18, 2010
  • pp: 1099–1104

Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters

Sang-Hwan Cho, Jeong Rok Oh, Hoo Keun Park, Hyoung Kun Kim, Yong-Hee Lee, Jae-Gab Lee, and Young Rag Do  »View Author Affiliations


Optics Express, Vol. 18, Issue 2, pp. 1099-1104 (2010)
http://dx.doi.org/10.1364/OE.18.001099


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Abstract

We demonstrate the combined effects of a microcavity structure and light-recycling filters (LRFs) on the forward electrical efficiency of phosphor-converted white organic light-emitting diodes (pc-WOLEDs). The introduction of a single pair of low- and high-index layers (SiO2/TiO2) improves the blue emission from blue OLED and the insertion of blue-passing and yellow-reflecting LRFs enhances the forward yellow emission from the YAG:Ce3+ phosphors layers. The enhancement of the luminous efficacy of the forward white emission is 1.92 times that of a conventional pc-WOLED with color coordinates of (0.34, 0.34) and a correlated color temperature of about 4800 K.

© 2010 OSA

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(230.1480) Optical devices : Bragg reflectors
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Devices

History
Original Manuscript: November 25, 2009
Revised Manuscript: December 23, 2009
Manuscript Accepted: January 4, 2010
Published: January 8, 2010

Virtual Issues
Focus Issue: Solar Concentrators (2010) Optics Express

Citation
Sang-Hwan Cho, Jeong Rok Oh, Hoo Keun Park, Hyoung Kun Kim, Yong-Hee Lee, Jae-Gab Lee, and Young Rag Do, "Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters," Opt. Express 18, 1099-1104 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-2-1099


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