Disclosed are an aluminum chelate complex capable of stabilizing the degree of vacuum in a film-forming chamber in the vapor deposition step and producing efficiently a high-quality organic EL device which shows excellent reliability and durability in practical use and an organic EL device using the said aluminum chelate complex. The aluminum chelate complex useful as an organic EL material is represented by L
1
Al(L
2
)
2
, contains 0.6 mol % or less of a complex represented by Al(L
2
)
3
, and is obtained by reacting an aluminum alkoxide with a quinolinol derivative and then with a phenolic compound and purifying the resulting complex to a high degree. In the formulas, L
1
denotes a phenolate ligand and L
2
denotes a substituted quinolinolate ligand.
本发明公开了一种铝螯合物复合物,能够稳定蒸汽沉积步骤中形成膜的室内真空度,并能够高效地生产出高质量的有机EL器件,该器件在实际使用中表现出优异的可靠性和耐久性,以及使用所述铝螯合物复合物的有机EL器件。作为有机EL材料有用的铝螯合物复合物表示为L1Al(
L2)2,含有0.6 mol%或更少的由Al(
L2)3表示的复合物,并通过将铝烷氧化物与
喹啉酚衍
生物反应,然后与
酚类化合物反应并将所得的复合物高度纯化而获得。在公式中,L1表示
酚酸盐
配体,
L2表示取代
喹啉酸盐
配体。