This invention relates to an organic aluminum complex manifesting excellent performance when used in an organic EL device and to a process for preparing said complex. The organic EL material of this invention comprises an organoaluminum complex which generates heat of 2 J/g or less In the range of 350-400° C. and absorbs heat of 70-120 j/g, in the range of 400-450° C., with the maximum of an endothermic peak being located near 420° C. on analysis by differential scanning calorimetry. The organic EL material can be obtained by refining the raw material (8-quinolinolato)aluminum by sublimation under reduced pressure of 20 Torr or less while maintaining the temperature in the sublimation zone above 300° C. and below 420° C. and the temperature in the product recovery zone above 100° C. and below 250° C.
本发明涉及一种
有机铝配合物,在有机EL器件中使用时表现出优异性能,以及制备该配合物的方法。本发明的有机EL材料包括一种
有机铝配合物,其在350-400°C范围内产生2 J/g或更低的热量,并在400-450°C范围内吸收70-120 j/g的热量,其最大的吸热峰位于420°C附近,在差示扫描量热法分析中。通过在减压20 Torr或更低的条件下,在升华区保持温度在300°C以上且在420°C以下,在产物回收区保持温度在100°C以上且在250°C以下,通过精制原料(8-
喹啉酮)铝而得到。