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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 12 — Jun. 9, 2008
  • pp: 8868–8875

Improvement of viewing angle and pixel contrast ratio in green top-emitting organic light-emitting devices

Shufen Chen, Wenfa Xie, Wei Huang, and Shiyong Liu  »View Author Affiliations

Optics Express, Vol. 16, Issue 12, pp. 8868-8875 (2008)

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Green top-emitting organic light-emitting devices based on tris-(8-hydroxyl-quinoline) aluminum are fabricated with a low reflective Sm/Ag cathode and a comparative Al/Ag cathode. An additional 2,9-dimethyl-4,7-diphenyl-1, 10-phenanthroline (BCP) layer, used as a light outcoupling layer, is deposited onto the SmAg cathode to improve device performances. The influence of different cathodes and the BCP layer on electrical and optical characteristics are investigated and discussed. It is worth mentioning that the introduction of the BCP layer not only enhances the brightness and the luminous efficiency but also improves the viewing angle and the pixel contrast ratio.

© 2008 Optical Society of America

OCIS Codes
(160.4890) Materials : Organic materials
(230.3670) Optical devices : Light-emitting diodes
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Optical Devices

Original Manuscript: April 1, 2008
Revised Manuscript: May 13, 2008
Manuscript Accepted: May 14, 2008
Published: June 2, 2008

Shufen Chen, Wenfa Xie, Wei Huang, and Shiyong Liu, "Improvement of viewing angle and pixel contrast ratio in green top-emitting organic light-emitting devices," Opt. Express 16, 8868-8875 (2008)

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