| abstract |
An organic electroluminescent device including in sequence an anode, a first emitting layer ( 5 ), a carrier barrier layer ( 6 ), a second emitting layer ( 7 ) and a cathode stacked; wherein the ionization potential of the carrier barrier layer ( 6 ) is more than the ionization potential of the first emitting layer ( 5 ) by 0.1 eV or more and the affinity level of the carrier barrier layer ( 6 ) is less than the affinity levels of the first emitting layer ( 5 ) and the second emitting layer ( 7 ) by 0.1 eV or more. |