A terbium (III) complex with triphenylamine-functionalized ligand for organic electroluminescent device
Document Type
Article
Publication Date
4-1-2008
Abstract
A novel ligand, 4-diphenylamino-benzoic acid (HDPAB), and the corresponding Tb (III) complex, Tb (DPAB)3 which can be dissolved easily in organic solvents were synthesized and characterized. Organic electroluminescent (EL) device with a structure of indium tin oxide (ITO)/poly(N-vinylcarbazole) (PVK): Tb (DPAB)3 (50 wt%, 80 nm)/1,3,5-tris-(N-phenylbenzimidazol-2-yl)benzene (TPBI) (30 nm)/tri(8-hydroxyquinoline)aluminum (AlQ) (20 nm)/LiF (1 nm)/Al (150 nm) in which Tb (DPAB)3 acted as an emitter were fabricated. The maximum luminance of 230 cd m-2 at 20 V and the maximum efficiency of 0.62 cd A-1 were obtained due to the introduction of hole-transporting group, representing the best result to date among Tb (III) carboxylate complexes based EL devices. These results indicate that modifications of rare earth complexes are a promising way to improve the properties of EL devices. © 2007 Elsevier B.V. All rights reserved.
Publication Source (Journal or Book title)
Journal of Luminescence
First Page
620
Last Page
624
Recommended Citation
Zhang, L., Li, B., Yue, S., Li, M., Hong, Z., & Li, W. (2008). A terbium (III) complex with triphenylamine-functionalized ligand for organic electroluminescent device. Journal of Luminescence, 128 (4), 620-624. https://doi.org/10.1016/j.jlumin.2007.10.008
