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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 1052–1054

Enhancing waveguided light extraction in organic LEDs using an ultra-low-index grid

Michael Slootsky and Stephen R. Forrest  »View Author Affiliations

Optics Letters, Vol. 35, Issue 7, pp. 1052-1054 (2010)

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Improved outcoupling of light into substrate modes of an organic LED (OLED) by an ultra-low index of refraction ( n = 1.15 ) , porous SiO 2 grid (UltraLIG) fabricated using glancing-angle deposition is demonstrated. Outcoupling into the substrate for electrophosphorescent tris(2-phenylpyridine) iridium [ Ir ( ppy ) 3 ] -based OLEDs grown on substrates with the UltraLIG is increased by 48% over a conventional device at a luminance of 100   cd / m 2 . With efficient light outcoupling at the substrate–air interface, the UltraLIG devices attain η EQE = 22.5 % and η P = 64   lm / W at their peak efficiencies, a nearly threefold increase over an analogous conventional OLED.

© 2010 Optical Society of America

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(250.0250) Optoelectronics : Optoelectronics
(310.1860) Thin films : Deposition and fabrication

ToC Category:
Optical Devices

Original Manuscript: January 11, 2010
Manuscript Accepted: February 2, 2010
Published: March 31, 2010

Michael Slootsky and Stephen R. Forrest, "Enhancing waveguided light extraction in organic LEDs using an ultra-low-index grid," Opt. Lett. 35, 1052-1054 (2010)

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