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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6170–6174

Efficient waveguide mode extraction in white organic light emitting diodes using ITO-anodes with integrated MgF2-columns

Tobias Bocksrocker, Florian Maier-Flaig, Carsten Eschenbaum, and Uli Lemmer  »View Author Affiliations

Optics Express, Vol. 20, Issue 6, pp. 6170-6174 (2012)

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We report a simple approach to enhance the out-coupling efficiency in white organic light emitting diodes (WOLEDs). By incorporating MgF2-columns into the ITO-anode and optimizing of their geometry, an overall efficiency enhancement of up to 38% is achieved. In addition, the structuring of the anode does not lead to a change in the electrical behaviour of the devices. As evidenced by goniometric measurements, the angular emission characteristics of the WOLEDs remain unchanged. Simulations, performed with the T-matrix method, reveal the effect of the enhanced outcoupling efficiency of this approach.

© 2012 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(230.7390) Optical devices : Waveguides, planar
(250.3680) Optoelectronics : Light-emitting polymers

ToC Category:
Optical Devices

Original Manuscript: December 23, 2011
Revised Manuscript: February 28, 2012
Manuscript Accepted: February 28, 2012
Published: March 1, 2012

Tobias Bocksrocker, Florian Maier-Flaig, Carsten Eschenbaum, and Uli Lemmer, "Efficient waveguide mode extraction in white organic light emitting diodes using ITO-anodes with integrated MgF2-columns," Opt. Express 20, 6170-6174 (2012)

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