Organic electroluminescent device
AssigneeTDK Corporation
InventorsMichio Arai, Osamu Onitsuka
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Abstract
An organic EL device has a hole injecting electrode (2), an electron injecting electrode (6), an organic layer participating in a light emitting function disposed between the electrodes. The organic layer includes a light emitting layer (4) comprising a conjugated polymer. The device further includes an inorganic insulative hole injecting layer (3) or an inorganic insulative electron injecting layer (5). The device can take advantage of both organic and inorganic materials, and has an improved efficiency, an extended effective life, and a low cost.
Claims20
An organic electroluminescent device comprising a hole injecting electrode,
- an electron injecting electrode,
- an organic layer participating in a light emitting function disposed between the electrodes, said organic layer including a light emitting layer comprising a conjugated polymer, and
- an inorganic insulative hole injecting layer disposed between the light emitting layer and the hole injecting electrode, wherein said inorganic insulative hole injecting layer contains as a main component an oxide represented by the formula:
- (SixGe1−x)Oy
- wherein x is from 0 to 1 and y is from 0.2 to 1.99, and
- wherein said inorganic insulative hole injecting layer further contains up to 30 wt. % based on the main component of carbon or nitrogen or a mixture of carbon and nitrogen.
An organic electroluminescent device comprising
- a hole injecting electrode,
- an electron injecting electrode,
- an organic layer participating in a light emitting function disposed between the electrodes, said organic layer including a light emitting layer comprising a conjugated polymer, and
- an inorganic insulative electron injecting layer disposed between the light emitting layer and the electron injecting electrode, wherein said inorganic insulative electron injecting layer contains a metal oxide having an electron affinity of up to 3.5 eV as a main component and at least one member selected from the group consisting of oxides, nitrides and carbides of silicon and germanium.
Dependencies are inferred from the claim text.