A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs

A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs

The bipolar host material BCPO (bis‐4‐ (N‐carbazolyl)phenylphosphine oxide) containing a phosphine oxide and two carbazole groups, synthesized in three steps, shows a high triplet energy gap of 3.01 eV. The material can be used as a universal host for blue, green, and red phosphorescent devices, all...

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Veröffentlicht in:Advanced materials (Weinheim) 2010-06, Vol.22 (22), p.2468-2471
Hauptverfasser: Chou, Ho-Hsiu, Cheng, Chien-Hong
Format: Artikel
Sprache:eng
Schlagworte:
Bipolar host
Carbazoles - chemistry
Color
Electrophosphorescence
Electrophosphorescence,·Full‐color displays
Full-color displays
Iridium - chemistry
OLEDs
Phosphines - chemistry
Spectrometry, Fluorescence
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Zusammenfassung:The bipolar host material BCPO (bis‐4‐ (N‐carbazolyl)phenylphosphine oxide) containing a phosphine oxide and two carbazole groups, synthesized in three steps, shows a high triplet energy gap of 3.01 eV. The material can be used as a universal host for blue, green, and red phosphorescent devices, all giving extremely high efficiencies with turn‐on voltages within 3 V.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201000061