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

Wei Sheng Huang, Jiann T. Lin*, Hong-Cheu Lin

*Corresponding author for this work

研究成果: Article

32 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)557-568
頁數12
期刊Organic Electronics
9
發行號5
DOIs
出版狀態Published - 1 一月 2008

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