Green phosphorescent iridium dendrimers containing dendronized benzoimidazole-based ligands for OLEDs

Content Provider	Semantic Scholar
Author	Huang, Wei-Sheng Lin, Jiann T. Lin, Hong-Cheu
Copyright Year	2008
Abstract	Abstract A series of novel non-conjugated functionalized benzoimidazole-based dendrimers containing peripheral benzyl ether type dendrons have been synthesized and characterized. These compounds undergo cyclometalation with iridium trichloride to form iridium(III) complexes. The emission wavelengths of these dendrimers are in the range from 510 to 530 nm, and the photoluminescence quantum yields (PLQYs) in the range from 0.45 to 0.80. Dendrimers (Gn)2Ir(acac) and (Gn)3Ir exhibit a reversible one-electron oxidation wave at ∼0.55 V and ∼0.37 V (vs. Ag/AgNO3), respectively. With a device configuration of indium tin oxide/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid)/4,4′-bis(N-carbarzolyl)biphenyl:(G2)3Ir 20 wt% dopant/1,3,5-tris(2-N-phenyl-benzoimidazolyl)benzene/LiF/Al has a maximum external quantum efficiency (EQE) of 17.6% and a maximum current efficiency of 61.5 cd/A.
Starting Page	557
Ending Page	568
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1016/j.orgel.2008.03.001
Volume Number	9
Alternate Webpage(s)	https://ir.nctu.edu.tw/bitstream/11536/8265/1/000259133500002.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.orgel.2008.03.001
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article