Organic electroluminescence devices using pyrazolo[3,4b]quinoxaline derivatives
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United States of America Patent
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Mar 1, 2005
Grant Date -
Mar 4, 2004
app pub date -
Aug 28, 2002
filing date -
Aug 28, 2002
priority date (Note) -
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Abstract
An organic electroluminescence device which includes an anode, a cathode, a hole transport layer, an electron transport layer, and at least one organic luminescent medium doped with a pyrazolo[3,4b]quinoxaline derivative is disclosed. The present device provides improved efficiency, and the emission band associated therewith is surprisingly narrow. The improved green emitting organic electroluminescence device exhibits high color purity.
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