Organic EL device and preparation method
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United States of America Patent
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Mar 28, 2006
Grant Date -
Mar 24, 2005
app pub date -
Sep 28, 2004
filing date -
Aug 20, 2001
priority date (Note) -
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Abstract
In an organic EL device comprising a cathode, an anode, and two or more stacked organic layers therebetween including a light emitting layer, an electron injecting organic layer containing an organic salt or complex of a metal having a standard electrode potential of more negative than -1.8 V at 25° C. is formed close to the cathode by coating, and an organic layer containing a high molecular weight EL material is disposed close to the electron injecting organic layer. A multilayer structure of organic layers can be formed by coating, and the organic EL device has a high luminance, high efficiency, high reliability, long life and ease of handling.
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