Synthesis and emission analysis of novel rare earth complex Eu(TTA)3(2NH2-Phen)

来源期刊:中国有色金属学报(英文版)2010年第12期

论文作者:吕玉光 李刚 石春卉 于连生 栾芳 张福俊

文章页码:2336 - 2339

Key words:synthesis; ternary complex; luminescence; electroluminescence

Abstract: The rare earth ternary complex of Eu3+ with thenoyltrifluoroacetone, and 4, 7-2NH2 phenanthroline was synthesized and well characterized by UV, fluorescent, IR spectrometry and X-ray diffractometry (XRD) as well as elemental analysis. The results show that the complex of Eu(III) emits strong red luminescence when excited by UV light, and Eu(TTA)3(2NH2-Phen) has the higher sensitized luminescent efficiency and longer lifetime than Eu(TTA)3(Phen). In device of ITO/PVK/Eu(TTA)3(2NH2-Phen)/Al, the spectra of Eu(TTA)3(2NH2-Phen) with different ratios for spin-cast film were monitored. The main emitting peak at 614 nm can be attributed to the transition of 5D07F2 of Eu3+ and this process results in the enhancement of red emission from electroluminescence device. The effect and mechanism of the ligands on the luminescence properties of europium complex were discussed. The results show that the luminescence intensity of the title complexes greatly increases in comparison with that of their corresponding complexes, revealing that the second ligands form very good synergistic effect with the first ligands. The title complexes possess excellent thermal stability properties, and are hopefully developed into fine PL and EL red materials.

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