一种新型铕（Ⅲ）三元配合物的合成与电致发光

合成了一种含有空穴传导基团三苯胺、电子传导基团噁二唑的新型配体(EtPOTIP)及其铕(Ⅲ)的三元配合物Eu(DBM)₃EtPOTIP，通过1H NMR、IR、元素分析及质谱对它们的结构进行了表征。对配体和配合物的吸收光谱及光致发光光谱研究结果表明:配体和配合物对近紫外光有强烈吸收，配合物在近紫外光激发下发出强的Eu3+特征红光，荧光量子效率为0.48；热分析显示配合物具有高的热稳定性，表明合成的配合物是一种优良的多功能红色发光材料。制作了相应的明亮电致发光器件，显示EtPOTIP同时具备空穴传导和电子传导性能，EtPOTIP在配合物中的存在显著改善了器件的电致发光性能。

An organic compound with both electron-transporting and hole-transporting groups,1-ethyl-2-(2-[(4-N,N'-diphenyl)-phenylamine]-5-phenyl-1,3,5-oxadiazole) imidazo[4,5]-1,10-phenanthroline(EtPOTIP),was designed and synthesized.With EtPOTIP as the secondary ligand and dibenzoylmethane(HDBM) as the first ligand,the corresponding europium(Ⅲ) ternary complex,Eu(DBM)3EtPOTIP, was prepared.EtPOTIP and the complex were characterized by elemental analysis, 1H NMR,IR and mass spectroscopy.TG and DSC analyses show that the complex exhibits high thermal stability and high Tg temperature.UV-Vis absorption and photoluminescence measurements demonstrate that the excitation light energy absorbed by the organic ligands was transferred to the central Eu3+ ion efficiently in the ternary complex,and the latter is an excellent red emitting material with a high quantum yield of 0.48.A bright tri-layer organic light-emitting diode(OLED) with structure of ITO/CuPC(15 nm)/TPD(45 nm)/Eu(DBM)3EtPOTIP(20 nm)/Alq3(40 nm)/Ca(30 nm)/Al(100 nm) was fabricated,and the electroluminescence measurements indicate that EtPOTIP exhibits both electron-transporting and hole-transporting properties and the latter is dominant.Existence of EtPOTIP in the complex obviously improves the performance of the device.