Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands | |
Chen, Zhuqi ; Ding, Fei ; Hao, Feng ; Guan, Ming ; Bian, Zuqiang ; Ding, Bei ; Huang, Chunhui | |
刊名 | new journal of chemistry
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2010 | |
关键词 | INTRAMOLECULAR ENERGY-TRANSFER EFFICIENT RED ELECTROLUMINESCENCE LIGHT-EMITTING DEVICES LUMINESCENCE QUANTUM YIELDS RARE-EARTH COMPLEXES STRUCTURAL-CHARACTERIZATION TERBIUM COMPLEXES BETA-DIKETONATE METAL-COMPLEXES PHOTOLUMINESCENCE |
DOI | 10.1039/b9nj00461k |
英文摘要 | Several 1,10-phenanthroline derivatives (PhoR), 2,2 '-bipyridine derivatives (BpoR) and related europium complexes Eu(TTA)(3)PhoR and Eu(TTA)(3)BpoR were synthesized (HTTA = 2-thenoyltrifluoroacetone). Single crystal X-ray diffraction of Eu(TTA)(3)Php (Php = 2-(pyridyl)-1,10-phenanthroline) shows that Php acts as a tridentate N(boolean AND)N(boolean AND)N ligand, leading to a high stability of the complex for vacuum evaporation. When an oxadiazole moiety is incorporated into the ligand, the corresponding europium complexes show improved carrier-transporting abilities as well as thermal stabilities under vapor deposition for electroluminescence (EL) applications. Experiments revealed that these complexes have high photoluminescence (PL) quantum yields due to suitable triplet energy levels (ET) of the ligands, between 19 724 and 22 472 cm(-1), for the sensitization of Eu(III) ((5)D(0): 17 500 cm(-1)). Utilizing Eu(TTA)(3)PhoB (PhoB = 2-(5-phenyl-1,3,4-oxadiazol-2-yl)-1,10-phenanthroline) as the dopant emitter in CBP (4,4 '-N,N '-dicarbazolebiphenyl), EL devices with a structure of TPD (4,4 '-bis[N-(p-tolyl)-N-phenylamino] biphenyl, 30 nm)/Eu(TTA)(3)PhoB: CBP (7.5%, 20nm)/BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, 20 nm)/Alq3 (tris(8-hydroxyquinoline), 30 nm) exhibited a pure emission from europium ions. The highest efficiency obtained was 5.5 lm W(-1), 8.7 cd A(-1) and the maximum brightness achieved was 1086 cd m(-2). At a practical brightness of 100 cd m(-2), the e. ciency remains above 2.0 cd A(-1).; Chemistry, Multidisciplinary; SCI(E); 15; ARTICLE; 3; 487-494; 34 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/151226] ![]() |
专题 | 化学与分子工程学院 |
推荐引用方式 GB/T 7714 | Chen, Zhuqi,Ding, Fei,Hao, Feng,et al. Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands[J]. new journal of chemistry,2010. |
APA | Chen, Zhuqi.,Ding, Fei.,Hao, Feng.,Guan, Ming.,Bian, Zuqiang.,...&Huang, Chunhui.(2010).Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands.new journal of chemistry. |
MLA | Chen, Zhuqi,et al."Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands".new journal of chemistry (2010). |
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