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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
2010
Source PublicationNEW JOURNAL OF CHEMISTRY
ISSN1144-0546
Volume34Issue:3Pages:487-494
AbstractSeveral 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).
DOI10.1039/b9nj00461k
Indexed BySCI ; IC
Language英语
WOS IDWOS:000275382100018
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69564
Collection中国科学院化学研究所
Corresponding AuthorBian, Zuqiang
AffiliationPeking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
Recommended Citation
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,2010,34(3):487-494.
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,34(3),487-494.
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 34.3(2010):487-494.
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