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Adv Mater. 2014 Sep 3;26(33):5864-8. doi: 10.1002/adma.201400330. Epub 2014 Jun 13.

High-efficiency orange and tandem white organic light-emitting diodes using phosphorescent dyes with horizontally oriented emitting dipoles.

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1
WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea.

Abstract

Tandem white organic light-emitting diodes (WOLEDs) using horizontally oriented phosphorescent dyes in an exciplex-forming co-host are presented, along with an orange OLED. A high external quantum efficiency of 32% is achieved for the orange OLED at 1000 cd m(-2) and the tandem WOLEDs exhibit a high maximum EQE of 54.3% (PE of 63 lm W(-1)).

KEYWORDS:

dyes; organic light-emitting diodes (OLEDs); phosphorescence; white OLEDs (WOLEDs)

PMID:
24923483
DOI:
10.1002/adma.201400330
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