DU Chun-nuan, SHENG Ye-feng, GE Guo-ping etc. Synthesis and Luminescence Property of Four Phosphorescent Iridium(Ⅲ) Pyrazine Complexes[J]. Chinese Journal of Luminescence, 2016,37(3): 280-285
DU Chun-nuan, SHENG Ye-feng, GE Guo-ping etc. Synthesis and Luminescence Property of Four Phosphorescent Iridium(Ⅲ) Pyrazine Complexes[J]. Chinese Journal of Luminescence, 2016,37(3): 280-285 DOI: 10.3788/fgxb20163703.0280.
Synthesis and Luminescence Property of Four Phosphorescent Iridium(Ⅲ) Pyrazine Complexes
3- diphenylpyrazine. The complexes were characterized by mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. Their photophysical properties were investigated by UV-Vis and photoluminescence (PL) spectroscopy. All of these Ir (Ⅲ) complexes show the noticeable absorption peaks from metal-to-ligand charge transfer (MLCT) transitions. The iridium (Ⅲ) complexes 1
2
3 and 4 have strong photoluminescence at 528
536
535 and 561 nm
respectively. Moreover
the iridium (Ⅲ) complex 4 was utilized as phosphorescence dopant in OLEDs with the structures of ITO/MoO
3
(1 nm)/CBP(35 nm)/CBP:Ir(15 nm)/TPBi(50 nm)/LiF(1nm)/Al(100 nm). The devices showed yellow emission at 567 nm with a maximum brightness of 32 110 cdm
-2
current efficiency of 32.4 cdA
-1
and power efficiency of 28.2 lmW
-1
.
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Keywords
references
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