Organic electroluminescent device with carrier blocking...

Details Organic electroluminescent device with carrier blocking... Organic electroluminescent device with carrier blocking...

2005-03-15

2010-06-15

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

Reexamination Certificate

active

07737625

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.

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