Organic EL Material, Organic EL Device Using the Same, and Method for Producing Organic EL Device
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Mar 14, 2006
filing date -
Mar 31, 2005
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Abandoned
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Abstract
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 L1Al(L2)2, contains 0.6 mol % or less of a complex represented by Al(L2)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, L1 denotes a phenolate ligand and L2 denotes a substituted quinolinolate ligand.
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