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A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs
Author(s) -
Chou HoHsiu,
Cheng ChienHong
Publication year - 2010
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201000061
Subject(s) - phosphorescence , phosphine oxide , materials science , host (biology) , carbazole , oled , oxide , phenylphosphine , optoelectronics , nanotechnology , photochemistry , phosphine , physics , organic chemistry , chemistry , optics , ecology , layer (electronics) , metallurgy , fluorescence , biology , catalysis
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.
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