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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 24 — Dec. 15, 2012
  • pp: 5235–5237

High contrast blue organic light-emitting diodes using inorganic multilayers of Al and ZnSe

You-Hyun Kim, Sang Youn Lee, Wook Song, Mei Meng, Richard Wood, Peter Mascher, Dae Hyun Ryu, and Woo Young Kim  »View Author Affiliations


Optics Letters, Vol. 37, Issue 24, pp. 5235-5237 (2012)
http://dx.doi.org/10.1364/OL.37.005235


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Abstract

High contrast blue organic light-emitting diodes were fabricated using an inorganic multilayer of NPB (700 Å)/MADN (200 Å)/Alq3 (300 Å)/LiF (10 Å)/Al (70 Å)/ZnSe (300 Å)/Al (1000 Å). The optical and electrical characteristics were measured and compared to conventional organic light-emitting devices (OLEDs) and OLEDs with polarizers. OLEDs with the metal multilayer cathodes had an improved contrast ratio of 1351 compared to 1041 for OLEDs with polarizers. In addition, the multilayer OLEDs had a low turn-on voltage of 3.5 V due to energy band fitting of ZnSe with Al and the electron transport layer.

© 2012 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Devices

History
Original Manuscript: June 15, 2012
Revised Manuscript: October 11, 2012
Manuscript Accepted: October 31, 2012
Published: December 14, 2012

Citation
You-Hyun Kim, Sang Youn Lee, Wook Song, Mei Meng, Richard Wood, Peter Mascher, Dae Hyun Ryu, and Woo Young Kim, "High contrast blue organic light-emitting diodes using inorganic multilayers of Al and ZnSe," Opt. Lett. 37, 5235-5237 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-24-5235


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