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Furo[3,2‐ c ]pyridine‐Based Iridium Complex Containing two Methoxy Groups for Efficient Solution‐Processed Phosphorescent OLEDs
Author(s) -
Xie Huiying,
Shao Jing,
Yan Zhimin,
Ding Junqiao
Publication year - 2019
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201800657
Subject(s) - iridium , chemistry , phosphorescence , pyridine , oled , quantum yield , photoluminescence , ligand (biochemistry) , photochemistry , medicinal chemistry , catalysis , organic chemistry , fluorescence , optoelectronics , materials science , biochemistry , physics , receptor , layer (electronics) , quantum mechanics
A furo[3,2‐ c ]pyridine‐based iridium complex, namely [(3,5‐diMeOpfupy) 2 Ir(acac)], has been designed and synthesized by introducing two methoxy groups at the 3‐ and 5‐positions of a phenyl ring. Such a small structure variation of the C^N ligand can not only avoid isomer production to favor easy purification, but also improve the solubility to ensure low‐cost wet methods. Similar to the model complex [(3‐MeOpfupy) 2 Ir(acac)] containing one methoxy group, [(3,5‐diMeOpfupy) 2 Ir(acac)] possesses an orange emission peak at 598 nm together with a photoluminescence quantum yield (PLQY) of 0.32 and an exciton lifetime of 1.29 μs. The corresponding solution‐processed devices realize a maximum current efficiency of 17.2 cd/A (18.5 lm/W, 8.9 %) as well as Commission Internationale de L'Eclairage (CIE) coordinates of (0.60, 0.39). The result indicates that the multiple methoxy modification is a promising strategy towards isomer‐free and solution‐processable furo[3,2‐c]pyridine‐based iridium complexes.