Europium complexes with new β-diketone ligands with fluorene for organic electroluminescent (EL) devices have been synthesized and their properties examined. The absorption spectra of the complexes were varied by changing the conjugated system of the β-diketone; also, the energy transfer from the host material to the europium complexes and the intramolecular energy transfer have been improved. Concerning the volatility, the thermal properties of the europium complexes were improved by using phenanthroline derivatives. We fabricated organic EL devices using the synthesized complexes, and investigated the luminance of the devices.
研究人员合成了带有新型
β-二酮配体和
芴的
铕络合物,这些络合物可用于有机电致发光(EL)器件,并对其特性进行了研究。通过改变
β-二酮的共轭体系,络合物的吸收光谱发生了变化;同时,从主材料到
铕络合物的能量传递以及分子内能量传递也得到了改善。在挥发性方面,使用
菲罗啉衍
生物改善了
铕络合物的热性能。我们利用合成的络合物制造了有机电致发光器件,并对器件的亮度进行了研究。