Citation: MA Ting-Chun, LIU Shu-Juan, TAO Peng, XU Hang, ZHAO Qiang, XU Wen-Juan, ZHANG Ping-Lin, WANG Yi-Fan, LUO Chang-Cheng, LIEN Shui-Chih Alan, HUANG Wei. A Fluorine-Containing Phosphorescent Iridium(Ⅱ) Complex for High-Efficiency Green Organic Light-Emitting Device[J]. Chinese Journal of Inorganic Chemistry, ;2015, (5): 1034-1040. doi: 10.11862/CJIC.2015.123
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A green-light emitting iridium(Ⅱ) complex Ir(dfbppy)2(acac) with 2-(3-(2',4'-difluorophenyl)phenyl)pyridine (Hdfbppy) as C^N ligands and 2,4-pentanedione (Hacac) as an ancillary ligand was designed and synthesized for phosphorescent organic light emitting diodes, and its photophysical and electroluminescent properties were investigated. The title complex exhibits a peak emission at 520 nm, a high PL quantum yield of 71%, and a relatively short phosphorescence emission lifetime of 381 ns in CH2Cl2 at room temperature. An organic light-emitting diode using this complex with 4,4'-N,N'-dicarbazolylbiphenyl (CBP) as the host shows a green color with CIE coordinates of (0.33, 0.62), accompanied by a rather excellent performance with a maximum luminance of 68324 cd·m-2 at 7.2 V, the luminous and power efficiencies are 53 cd·A-1 and 37 lm·W-1, respectively.
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