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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 12632–12639

Weak-microcavity organic light-emitting diodes with improved light out-coupling

Sang-Hwan Cho, Young-Woo Song, Joon-gu Lee, Yoon-Chang Kim, Jong Hyuk Lee, Jaeheung Ha, Jong-Suk Oh, So Young Lee, Sun Young Lee, Kyu Hwan Hwang, Dong-Sik Zang, and Yong-Hee Lee  »View Author Affiliations


Optics Express, Vol. 16, Issue 17, pp. 12632-12639 (2008)
http://dx.doi.org/10.1364/OE.16.012632


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Abstract

We propose and demonstrate weak-microcavity organic light-emitting diode (OLED) displays with improved light-extraction and viewing-angle characteristics. A single pair of low- and high-index layers is inserted between indium tin oxide (ITO) and a glass substrate. The electroluminescent (EL) efficiencies of discrete red, green, and blue weak-microcavity OLEDs are enhanced by 56%, 107%, and 26%, respectively, with improved color purity. Moreover, full-color 128×160 passive-matrix bottom-emitting OLED displays are fabricated by employing low-index layers of two thicknesses. As a display, the EL efficiency of white color was 27% higher than that of a conventional OLED display.

© 2008 Optical Society of America

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

ToC Category:
Optical Devices

History
Original Manuscript: May 23, 2008
Revised Manuscript: July 17, 2008
Manuscript Accepted: July 31, 2008
Published: August 6, 2008

Citation
Sang-Hwan Cho, Young-Woo Song, Joon-gu Lee, Yoon-Chang Kim, Jong Hyuk Lee, Jaeheung Ha, Jong-Suk Oh, So Young Lee, Sun Young Lee, Kyu Hwan Hwang, Dong-Sik Zang, and Yong-Hee Lee, "Weak-microcavity organic light-emitting diodes with improved light out-coupling," Opt. Express 16, 12632-12639 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-17-12632


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