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Iridium Complexes with Cyclometalated 2‐Cycloalkenyl‐Pyridine Ligands as Highly Efficient Emitters for Organic Light‐Emitting Diodes
Author(s) -
Kang Dong Min,
Kang JaeWook,
Park Jong Won,
Jung Sung Ouk,
Lee SeHyung,
Park HyungDol,
Kim YunHi,
Shin Sung Chul,
Kim JangJoo,
Kwon SoonKi
Publication year - 2008
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.200702558
Subject(s) - iridium , materials science , oled , pyridine , quantum efficiency , cyclohexene , diode , optoelectronics , photochemistry , combinatorial chemistry , catalysis , nanotechnology , organic chemistry , chemistry , layer (electronics)
Iridium complexes containing cyclometalated 2‐cyclohexenylpyridine derivatives with rigid and bulky cyclohexene units are synthesized, and found to be highly efficient materials in EL devices (see figure). Devices based on these iridium complexes emit yellowish‐ green light with the very high external quantum efficiency of 18.7%.