High-Efficiency Orange and Tandem White Organic Light-Emitting Diodes Using Phosphorescent Dyes with Horizontally Oriented Emitting Dipoles

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 m...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2014-09, Vol.26 (33), p.5864-5868
Main Authors: Lee, Sunghun, Shin, Hyun, Kim, Jang-Joo
Format: Article
Language:English
Subjects:
Dipoles
Dyes
Emittance
Organic light emitting diodes
organic light-emitting diodes (OLEDs)
phosphorescence
Quantum efficiency
white OLEDs (WOLEDs)
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Summary: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).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201400330