论文部分内容阅读
合成了具有双配体TTA和5NO_2Phen的稀土有机配合物Eu(TTA)_35NO_2Phen,通过元素分析、差热-热重、红外光谱和吸收光谱研究了配合物的组分、结构。元素分析的实验结果与理论计算的结果相吻合。从紫外可见吸收光谱中可以看出,稀土有机配合物的两个吸收峰分别位于340 nm和270 nm,这两个吸收峰分别与配体TTA和5NO_2Phen的吸收峰相关。在350 nm的光激发下,得到了三价铕离子的特征发射峰:583,593和612 nm,它们分别对应着铕离子5D_0→7F_0,5D_0→7F_1,5D_0→7F_2的跃迁发射,这说明有机配体可以将吸收的能量传递给三价铕离子使其发光,配体对稀土铕离子的发光有协同增强的作用。以Eu(TTA)_35NO_2Phen作为发光层,制备了ITO/PEDOT:PSS/PVK:Eu(TTA)_35NO_2Phen/BCP/Alq_3/Al的电致发光器件,在18 V驱动电压下器件发出了色坐标为(x=0.51,y=0.31)的红色电致发光。
The rare earth organic complex Eu (TTA) _35NO_2Phen with double ligand TTA and 5NO_2Phen was synthesized. The composition and structure of the complex were studied by elemental analysis, DTA-TG, IR and absorption spectra. The experimental results of elemental analysis are consistent with the results of theoretical calculation. It can be seen from the UV-Vis absorption spectra that the two absorption peaks of the rare earth organic complex are located at 340 nm and 270 nm, respectively, and the two absorption peaks are respectively related to the absorption peaks of the ligands TTA and 5NO 2 Phen. At 350 nm, the characteristic emission peaks of trivalent europium ions are obtained: 583,593 and 612 nm, which correspond to the transitional emission of europium ions 5D_0 → 7F_0, 5D_0 → 7F_1, 5D_0 → 7F_2, respectively. This indicates that the organic ligand The absorbed energy can be transmitted to the trivalent europium ion to make it emit light, and the ligand has a synergistic effect on the luminescence of the europium ion of the rare earth ion. The electroluminescent device of ITO / PEDOT: PSS / PVK: Eu (TTA) _35NO_2Phen / BCP / Alq_3 / Al was prepared with Eu (TTA) _35NO_2Phen as the luminescent layer. x = 0.51, y = 0.31).