ORGANIC ELECTROLUMINESCENT ELEMENT
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United States of America Patent
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Issued Date -
Apr 18, 2013
app pub date -
Jun 8, 2011
filing date -
Jun 8, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An organic electroluminescence device, including: an anode; a cathode opposed to the anode; and a first emitting layer and a second emitting layer between the anode and the cathode in this sequence from the anode, wherein: the first emitting layer and the second emitting layer each include a host and a phosphorescent dopant; the host of the first emitting layer and the host of the second emitting layer each have a triplet energy of 2.8 eV or more; the host of the first emitting layer has an ionization potential of 5.5 eV or less; and an affinity Af1 of the host of the first emitting layer is smaller than an affinity Af2 of the host of the second emitting layer.
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