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Energy Express

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 5 — Apr. 26, 2012

Improved light extraction efficiency in organic light emitting diodes with a perforated WO3 hole injection layer fabricated by use of colloidal lithography

Chung Sock Choi, Sung-Min Lee, Myung Sub Lim, Kyung Cheol Choi, Donghyuk Kim, Duk Young Jeon, Youngjo Yang, and O Ok Park  »View Author Affiliations


Optics Express, Vol. 20, Issue S2, pp. A309-A317 (2012)
http://dx.doi.org/10.1364/OE.20.00A309


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Abstract

We present an organic light emitting diode with a perforated WO3 hole injection layer to improve the light extraction efficiency. The two-dimensionally perforated WO3 layer was fabricated by use of colloidal lithography. The light extraction efficiency was improved due to Bragg scattering of waveguide modes and surface plasmon polaritons, and the operating voltage was also decreased. As a result, the external quantum efficiency and the power efficiency were increased as compared with those of conventional organic light emitting diodes without WO3 layer. The angular dependence of emission characteristics was investigated by measuring radiant intensity profiles for emission angles and azimuthal angles.

© 2012 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Light-Emitting Diodes

History
Original Manuscript: December 2, 2011
Revised Manuscript: February 16, 2012
Manuscript Accepted: February 18, 2012
Published: March 5, 2012

Virtual Issues
Vol. 7, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Chung Sock Choi, Sung-Min Lee, Myung Sub Lim, Kyung Cheol Choi, Donghyuk Kim, Duk Young Jeon, Youngjo Yang, and O Ok Park, "Improved light extraction efficiency in organic light emitting diodes with a perforated WO3 hole injection layer fabricated by use of colloidal lithography," Opt. Express 20, A309-A317 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S2-A309


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