Nearly monochromatic red electroluminescence from a nonconjugated polymer containing carbazole segments and phenanthroline [Eu(β‐diketonate)3] moieties |
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| Authors: | Zhi‐guo Zhang Ji‐bing Yuan Huai‐jun Tang Hao Tang Li‐na Wang Ke‐Li Zhang |
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| Affiliation: | 1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China;2. College of Biological Engineering, Hubei University of Technology, Wuhan, 430070, People's Republic of China;3. School of Material Science and Engineering, Shanghai University, Jiading campus, P. O. Box 815, 453 TaCheng Road, Jiading, Shanghai 201800, People's Republic of China |
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| Abstract: | A novel nonconjugated copolymer (PVKEu) with carbazole segments and phenanthroline [Eu(β‐diketonate)3] moieties was synthesized via free radical copolymerization, and characterized by FTIR, 1H NMR spectroscopy, GPC, ICP, and elemental analysis. The copolymer exhibited good solubility, as well as good thermal stability and high glass transition temperature. The photoluminescence (PL) of this polymer in solution and in solid film has been studied. A multi‐layer device with the configuration of ITO/PEDOT: PSS (40 nm)/PVKEu (70 nm)/BCP (15 nm)/AlQ3 (30 nm)/LiF/Al exhibited nearly monochromatic red emission at 615 nm and voltage‐independent spectral stability. Our results suggest that enhancing the ligand‐mediated energy transfer between the matrix polymer and europium complex is a potential method to improve the electroluminescence performance of the Eu‐chelated polymers. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 210–221, 2009 |
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| Keywords: | conducting polymers Eu‐chelated polymer fluorescence light emitting diodes metal‐polymer complexes |
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