ORGANIC ELECTROLUMINESCENT DEVICE
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United States of America Patent
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Issued Date -
Oct 9, 2008
app pub date -
Apr 3, 2008
filing date -
Apr 5, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides an organic electroluminescent device that can keep a stable luminescent characteristic for a long period. An organic electroluminescent device includes at least an anode 2, a charge generating layer 3, a luminescent layer 4 and a cathode 5 in this order. The charge generating layer 3 has an area 3a containing an electron transporting material at the anode side, and an area 3b containing a hole transporting material and a material capable of forming a charge transfer complex with the hole transporting material by an oxidation-reduction reaction at the cathode side, the hole transporting material and the material being laminated or mixed. The hole transporting material is in a radical cation state.
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