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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5364–5372

Highly efficient blue top-emitting device with phase-shift adjustment layer

Yanlong Meng, Wenfa Xie, Guohua Xie, Letian Zhang, Yi Zhao, Jingying Hou, and Shiyong Liu  »View Author Affiliations


Optics Express, Vol. 17, Issue 7, pp. 5364-5372 (2009)
http://dx.doi.org/10.1364/OE.17.005364


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Abstract

The phase shift on the reflection from a semitransparent electrode of a top-emitting organic light-emitting device is utilized in this paper to realize a deep blue emission with high efficiency. The phase shift could be adjusted by changing the thickness of Alq3 when it was deposited onto the semitransparent electrode of the device. Through simulation it is found that the blue shift of the resonant wavelength occurs in a certain range, which is concerned with Alq3 thickness and the cavity length between two reflective electrodes. According to the simulation, a blue top-emitting organic light-emitting device with a designed structure was demonstrated experimentally by using such a phase-shift adjustment layer. Finally, the device showed excellent performance both in efficiency (3.4 cd/A at 8 V) and Commission Internationale de l’Eclairage coordinates (0.13, 0.15). The brightness of the device reached 20 000 cd/m2.

© 2009 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes
(230.5750) Optical devices : Resonators
(310.0310) Thin films : Thin films
(310.6188) Thin films : Spectral properties
(310.6805) Thin films : Theory and design

ToC Category:
Optical Devices

History
Original Manuscript: October 27, 2008
Revised Manuscript: December 19, 2008
Manuscript Accepted: December 19, 2008
Published: March 20, 2009

Citation
Yanlong Meng, Wenfa Xie, Guohua Xie, Letian Zhang, Yi Zhao, Jingying Hou, and Shiyong Liu, "Highly efficient blue top-emitting device with phase-shift adjustment layer," Opt. Express 17, 5364-5372 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-7-5364


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