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Modified N,N′ ‐Dicarbazolyl‐3,5‐benzene as a High Triplet Energy Host Material for Deep‐Blue Phosphorescent Organic Light‐Emitting Diodes
Author(s) -
Cho Yong Joo,
Lee Jun Yeob
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201101095
Subject(s) - phosphorescence , phosphorescent organic light emitting diode , oled , diphenylphosphine oxide , carbazole , materials science , diode , optoelectronics , quantum efficiency , benzene , photochemistry , chemistry , optics , nanotechnology , physics , fluorescence , polymer chemistry , organic chemistry , layer (electronics)
Deeply phosphorescent device : A high efficiency deep‐blue phosphorescent organic light‐emitting diode was developed using a high triplet energy host material with carbazole and diphenylphosphine oxide units. A high quantum efficiency of 22.4 % with a color coordinate of (0.14,0.17) was achieved (see figure).