摘要
The rare earth ternary complex of Eu 3+ 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 5 D0→ 7 F2 of Eu 3+ 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.
The rare earth ternary complex of Eu 3＋ 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 5 D0→ 7 F2 of Eu 3＋ 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.
基金
Project(B201015)supported by the Natural Science Foundation of Heilongjiang Province,China
Project(11551482)supported by the Scientific and Technical Research Project of Education Department of Heilongjiang Province,China
Projects(L2010-124,L2010-144)supported by the Research Fund for Jiamusi University,China
Project(E08050204)supported by the Research Fund for the Provincial Key Laboratory of Biomaterials Jiamusi University,China
Project(2009-360)supported by Health Commission of Heilongjiang Province,China
Project supported by Key Laboratory of Luminescence and Optical Information,Beijing Jiaotong University,China
