Electroluminescent device with improved hole transport layer
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United States of America Patent
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Mar 26, 2002
Grant Date -
Dec 13, 2001
app pub date -
Dec 9, 1998
filing date -
Dec 9, 1998
priority date (Note) -
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Abstract
An organic electroluminescent device, including an anode and cathode and therebetween a hole transport layer; and an electron tranport layer disposed in an operative relationship with the hole transport layer; wherein the hole transport layer includes at least an aromatic hydrocarbon or fused hydrocarbon containing at least 20 carbon atoms and having an ionization potential greater than 5.0 eV.
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