Light-emitting element, display device, and electronic...

Details Light-emitting element, display device, and electronic... Light-emitting element, display device, and electronic...

2011-05-24

2011-05-24

Prenty, Mark (Department: 2822)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

Plural light emitting devices

C257SE33012, C313S506000

Reexamination Certificate

active

07947992

ABSTRACT:
A light-emitting element includes a cathode, an anode, a first light-emitting layer disposed between the cathode and the anode, a second light-emitting layer disposed between the first light-emitting layer and the cathode, a third light-emitting layer disposed between the second light-emitting layer and the cathode, a first interlayer disposed between the first and second light-emitting layers that has a function of preventing energy transfer of an exciton between the first and second light-emitting layers, and a second interlayer disposed between the second and third light-emitting layers that has a function of preventing energy transfer of an exciton between the second and third light-emitting layers, wherein the first interlayer has a hole-transporting property higher than that of the second interlayer, and the second interlayer has a electron-transporting property higher than that of the first interlayer.

REFERENCES:
patent: 2006/0227079 (2006-10-01), Kashiwabara
patent: A-2005-100921 (2005-04-01), None

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