ICCAS OpenIR
A highly efficient OLED based on terbium complexes
Chen, Zhuqi; Ding, Fei; Hao, Feng; Bian, Zuqiang; Ding, Bei; Zhu, Yezi; Chen, Fangfang; Huang, Chunhui
2009-08-01
Source PublicationORGANIC ELECTRONICS
ISSN1566-1199
Volume10Issue:5Pages:939-947
AbstractA neutral ligand 9-(4-tert-butylphenyl)-3,6-bis(diphenylphosphineoxide)-carbazole (DPPOC) and its complex Tb(PMIP)(3)DPPOC (A, where PMIP stands for 1-phenyl-3-methyl-4-isobutyryl-5-pyrazolone) were synthesized. DPPOC has a suitable lowest triplet energy level (24,691 cm(-1)) for the sensitization of Tb(Ill) ((5)D(4): 20,400 cm(-1)) and a significantly higher thermal stability (glass transition temperature 137 degrees C) compared with the familiar ligand triphenylphosphine oxide (TPPO). Experiments revealed that the emission layer of the Tb(PMIP)(3)DPPOC film could be prepared by vacuum co-deposition of the complex Tb(PMIP)(3)(H(2)O)(2) (B) and DPPOC (molar ratio = 1:1). The electroluminescent (EL) device ITO/N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-diphenyl-4,4'-diamine (NPB; 10nm)/Tb(PMIP)(3) (20 nm)/co-deposited Tb(PMIP)(3)DPPOC (30 nm)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP: 10nm)/tris(8-hydroxyquinoline) (AlQ; 20 nm)/Mg(0.9)Ag(0.1) (200 nm)/Ag (80 nm) exhibited pure emission from terbium ions, even at the highest current density. The highest efficiency obtained was 16.1 lm W(-1), 36.0 cd A(-1) at 6 V. At a practical brightness of 119 cd m(-2) (11V) the efficiency remained above 4.5 lm W(-1), 15.7 cd A(-1). These values are a significant improvement over the previously reported Tb(PMIP)(3)(TPPO)(2) (C). (C) 2009 Elsevier B.V. All rights reserved.
KeywordLight-emitting Diodes Terbium Complex Efficiency Co-deposition
DOI10.1016/j.orgel.2009.04.023
Indexed BySCI
Language英语
WOS IDWOS:000268368400029
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67810
Collection中国科学院化学研究所
Corresponding AuthorBian, Zuqiang
AffiliationPeking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhuqi,Ding, Fei,Hao, Feng,et al. A highly efficient OLED based on terbium complexes[J]. ORGANIC ELECTRONICS,2009,10(5):939-947.
APA Chen, Zhuqi.,Ding, Fei.,Hao, Feng.,Bian, Zuqiang.,Ding, Bei.,...&Huang, Chunhui.(2009).A highly efficient OLED based on terbium complexes.ORGANIC ELECTRONICS,10(5),939-947.
MLA Chen, Zhuqi,et al."A highly efficient OLED based on terbium complexes".ORGANIC ELECTRONICS 10.5(2009):939-947.
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