ORGANIC ELECTROLUMINESCENCE ELEMENT
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United States of America Patent
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Issued Date -
Feb 10, 2011
app pub date -
Nov 24, 2009
filing date -
Aug 5, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention provides an organic EL element having a multi-photon structure, in which optical absorption in the visible region caused by a charge-transfer complex in a conventional intermediate layer structure is inhibited, and the resistance of this intermediate layer to a counter career is improved, thus allowing high efficiency and a long operation life of the element. is formed by mixing or stacking an electron accepting material or an electron donating material and an organic compound, so as to avoid formation of a charge-transfer complex.
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