Aluminum chelate complex for organic el material
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United States of America Patent
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Issued Date -
Mar 8, 2007
app pub date -
Aug 6, 2004
filing date -
Aug 7, 2003
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Abandoned
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Abstract
This invention provides an organic EL material useful for the emissive layer of an organic EL element which deteriorates little in luminance when operated over a prolonged period of time and shows excellent durability. The material is an aluminum chelate complex which is represented by general formula (1) in which Ar.sub.1 is a mono- or bicylic arylene group, Ar.sub.2 is a mono- or bicyclic aryl group, R.sub.1--R.sub.6 are hydrogen or hydrocarbon groups containing 1-8 carbon atoms and contains a compound represented by general formula (1) in which Ar.sub.2 is a halogen as an impurity in an amount of 350 wt ppm or less.
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