TY - JOUR
T1 - Phosphorescent iridium(III) complexes based on 2-phenylimidazo[1,2-a]pyridine-type ligands
T2 - Synthesis, photophysical, electrochemical, and electrophosphorescent properties
AU - Yao, Chunliang
AU - Xue, Zhen
AU - Lian, Meng
AU - Xu, Xianbin
AU - Zhao, Jiang
AU - Zhou, Guijiang
AU - Wu, Yong
AU - Yu, Demei
AU - WONG, Wai Yeung
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/5/15
Y1 - 2015/5/15
N2 - New iridium(III) cyclometalated complexes based on 2-phenylimidazo[1,2-a]pyridine-type ligands were synthesized and their photophysical, electrochemical and electroluminescent (EL) properties were investigated. The detailed insight into the characters of the emissive excited states was obtained by frontier molecular orbital analysis. These metal complexes exhibit very balanced charge transporting ability for both kinds of charge carriers, which can furnish decent EL performance in the phosphorescent organic light-emitting devices (PHOLEDs) with peak luminance of 15491 cd m-2 at ca. 13.5 V, external quantum efficiency of 6.81%, luminance efficiency of 34.74 cd A-1, and power efficiency of 17.54 lm W-1. These results not only provide a better understanding of the inherent characters of IrIII phosphors with phenylimidazo[1,2-a]pyridine units, but also valuable information on future molecular design of triplet emitters with unique electronic features for high-performance PHOLEDs.
AB - New iridium(III) cyclometalated complexes based on 2-phenylimidazo[1,2-a]pyridine-type ligands were synthesized and their photophysical, electrochemical and electroluminescent (EL) properties were investigated. The detailed insight into the characters of the emissive excited states was obtained by frontier molecular orbital analysis. These metal complexes exhibit very balanced charge transporting ability for both kinds of charge carriers, which can furnish decent EL performance in the phosphorescent organic light-emitting devices (PHOLEDs) with peak luminance of 15491 cd m-2 at ca. 13.5 V, external quantum efficiency of 6.81%, luminance efficiency of 34.74 cd A-1, and power efficiency of 17.54 lm W-1. These results not only provide a better understanding of the inherent characters of IrIII phosphors with phenylimidazo[1,2-a]pyridine units, but also valuable information on future molecular design of triplet emitters with unique electronic features for high-performance PHOLEDs.
KW - 2-Phenylimidazo[1,2-a]pyridine
KW - Electroluminescence
KW - Iridium(III) complexes
KW - Organic light-emitting diodes
KW - Phosphorescence
UR - http://www.scopus.com/inward/record.url?scp=84925839666&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2014.05.003
DO - 10.1016/j.jorganchem.2014.05.003
M3 - Article
AN - SCOPUS:84925839666
SN - 0022-328X
VL - 784
SP - 31
EP - 40
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
M1 - 18575
ER -