Synthesis and luminescence property of four phosphorescent iridium(III) pyrazine complexes

被引：0

作者：

Du C.-N. ^{[1
]}

Sheng Y.-F. ^{[1
]}

Ge G.-P. ^{[1
]}

Guo Z.-Y. ^{[1
]}

Yu G. ^{[2
]}

Liu Z.-W. ^{[2
]}

机构：

[1] State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo

[2] College of Chemistry and Molecular Engineering, Peking University, Beijing

来源：

Ge, Guo-Ping (geguoping@nbu.edu.cn) | 1600年 / Editorial Office of Chinese Optics卷 / 37期

关键词：

Iridium complex; OLED; Phosphorescent material; Pyrazine;

D O I：

10.3788/fgxb20163703.0280

中图分类号：

学科分类号：

摘要：

Four iridium (III) pyrazine complexes 1 [(DFMPPZ)2Ir(pic)], 2 [(DFMPPZ)2IrCl-(PPh3)], 3 [(DFMPPZ)2Ir(CN)(PPh3)], and 4 [(DPPF)2Ir(acac)] were synthesized, where DFMPPZ=2-(2,4-difluorophenyl)- 3-methylpyrazine, pic=picolinate, Ph=phenyl, acac=acetylacetonate, MDPPF=4,4'-difluoro-5-methyl-2,3- 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/MoO3(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 cd·m-2, current efficiency of 32.4 cd·A-1, and power efficiency of 28.2 lm·W-1. © 2016, Science Press. All right reserved.

引用

页码：280 / 285

页数：5

共 19 条

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