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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 3 — Feb. 2, 2009
  • pp: 1577–1582

White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers

Y. B. Yuan, S. Li, Z. Wang, H. T. Xu, and X. Zhou  »View Author Affiliations

Optics Express, Vol. 17, Issue 3, pp. 1577-1582 (2009)

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We report white organic light-emitting diodes (WOLEDs) combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers (CCLs). With an iridium (III) [bis(4,6-di-fluoropheny)-pyridinato-N,C2’] picolinate (FIrpic) doped 4,4’-bis(9-carbazolyl)-2,2’-dimethyl-biphenyl (CDBP) blue electrophosphorescent light emitting layer, and an appropriate red surface CCL containing 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), the WOLED generate high efficiency and very pure white light with a peak luminous (power) efficiency of 18.1 cd/A (9.5 lm/W) and CIE coordinates of (0.32, 0.31), very close to the equal-energy white, respectively. Moreover, the output spectra and CIE coordinates of the WOLED show no significant change at a wide range of current density.

© 2009 Optical Society of America

OCIS Codes
(160.4890) Materials : Organic materials
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Devices

Original Manuscript: December 17, 2008
Revised Manuscript: January 16, 2009
Manuscript Accepted: January 18, 2009
Published: January 26, 2009

Y. B. Yuan, S. Li, Z. Wang, H. T. Xu, and X. Zhou, "White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers," Opt. Express 17, 1577-1582 (2009)

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