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合成了一种新型环金属铱(Ⅲ)配合物(dpci)2Ir(pic),通过核磁共振氢谱和飞行时间质谱对配合物的结构进行了确定,同时对其光物理性能和电化学性能进行了表征。结果表明(dpci)2Ir(pic)在二氯甲烷中的发光波长为657 nm,量子产率约为0.005,磷光寿命为226 ns。其HOMO能级为-5.16 eV,LUMO能级为-3.16 eV。将铱配合物以0.5~4.0%质量浓度掺杂于聚乙烯基咔唑(PVK)-2-(4-叔丁基苯)-5-(4-联苯基)-1,3,4-噁二唑(PBD)中,通过旋涂成膜做成电致发光器件。掺杂2.0%的器件表现出最好的性能,电致发光波长为658 nm。器件的启明电压为11.5 V,最大外量子效率为9.1%,最大亮度为2 484 cdm-2,对应的流明效率为5.31cd.A-1。色坐标是(0.66,0.31)接近标准红色的色坐标。
A new type of dpci 2Ir (pic) was synthesized. The structure of the complex was confirmed by 1H-NMR and time-of-flight mass spectrometry, and its photophysical and electrochemical properties Characterization. The results show that (dpci) 2Ir (pic) has a luminescence wavelength of 657 nm in dichloromethane, a quantum yield of about 0.005, and a phosphorescence lifetime of 226 ns. The HOMO level is -5.16 eV and the LUMO level is -3.16 eV. The iridium complex was doped at a mass concentration of 0.5-4.0% into polyvinylcarbazole (PVK) -2- (4-tert-butylphenyl) -5- (4-biphenylyl) In oxadiazole (PBD), an electroluminescent device was formed by spin-on film formation. Devices doped with 2.0% exhibited the best performance with an electroluminescence wavelength of 658 nm. The device has a turn-on voltage of 11.5 V, a maximum external quantum efficiency of 9.1%, a maximum brightness of 2 484 cdm-2 and a corresponding lumens efficiency of 5.31 cd.A-1. The color coordinates are (0.66, 0.31) close to the standard red color coordinates.