Cyclometalated Platinum(II) Complexes of Lepidine-Based Ligands as Highly Efficient Electrophosphors

被引：70

作者：

Velusamy, Marappan ^{[1
]}

Chen, Chih-Hsin ^{[1
]}

Wen, Yuh S. ^{[1
]}

Lin, Jiann T. ^{[1
]}

Lin, Chao-Chen ^{[2
]}

Lai, Chin-Hung ^{[2
]}

Chou, Pi-Tai ^{[2
]}

机构：

[1] Acad Sinica, Inst Chem, Taipei 115, Taiwan

[2] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

来源：

ORGANOMETALLICS | 2010年 / 29卷 / 17期

关键词：

LIGHT-EMITTING DEVICES; PHOSPHORESCENT IRIDIUM COMPLEXES; CROSS-COUPLING REACTIONS; TRIPLET EMITTERS; SYNTHETIC CONTROL; STATE PROPERTIES; PHOTOPHYSICS; EMISSION; ENERGY; METAL;

D O I：

10.1021/om100573r

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new series of lepidine-containing-ligand-based cyclometalated platinum(II) complexes 1-7 with general formula [Pt(L)acac] (L = lepidine-based ligand, acac = acetylacetonate) have been synthesized. The complexes have been characterized using spectral and electrochemical techniques. The single-crystal X-ray structures of complexes 2 and 5 have been successfully determined. The effects of substituents on the electronic features and redox potentials of the cyclometalated phenyl ring of the complexes are discussed. Complexes 1-7 are highly phosphorescent in fluid as well as in solid state, covering a rather broad spectral range from yellow to saturated red. These complexes were successfully used as a dopant material to fabricate the electroluminescent device, ITO/NPB (40 nm)/CBP-doped Pt complex (5 wt %) (20 nm)/BCP (10 nm)/Alq(3) (20 nm)/LiF (1 nm)/Al (150 nm), which exhibits very promising performance. The device doped with 5 wt % 3 produced a maximum external quantum efficiency of 15.2% maximum brightness of 26847 cd m(-2) and corresponds to a luminance efficiency of 29.83 cd A(-1.)

引用

页码：3912 / 3921

页数：10

共 91 条

[1] High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials [J].