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合成了一种新型的稀土铕配合物Eu0.5La0.5(TTA)3phen,把它作为发光材料应用于有机电致发光中。把铕配合物与高分子导电聚合物共混制得混合溶液,然后用旋涂的方法制得了发光层。实验中制备了单层、双层器件,讨论了器件的优化条件,并用能级图探讨了Eu0.5La0.5(TTA)3phen与PVK共混体系光致、电致发光的能量传递机制。优化后的双层器件,开启电压为6.5 V,在电压12.5 V,电流密度为68.48mA.cm-2时器件达到最大亮度238.4 cd.m-2,发光效率0.35 cd.A-1。
A novel rare earth europium complex Eu0.5La0.5 (TTA) 3phen was synthesized and used as a luminescent material in organic electroluminescence. The europium complex and macromolecule conductive polymer are mixed to prepare a mixed solution, and then the luminescent layer is prepared by a spin coating method. Single-layer and double-layer devices were prepared in this experiment. The optimum conditions of the device were discussed. The energy transfer mechanism of photoluminescence and electroluminescence of Eu0.5La0.5 (TTA) 3phen and PVK blends was also discussed by energy level diagram. The optimized bilayer device has a turn-on voltage of 6.5 V, a maximum luminance of 238.4 cd.m-2 and a luminous efficiency of 0.35 cd.A-1 at a voltage of 12.5 V and a current density of 68.48 mA · cm-2.