Manufacture of organic light emitting devices
AssigneeCambridge Display Technology Limited
InventorsRichard Henry Friend, Andrew Bruce Holmes, Stephen Carl Moratti
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Abstract
A method of making a light emitting device comprises the laminating together of two self-supporting components, at least one of which has a light emitting layer (12) on an inner surface thereof. A first self-supporting component is formed by coating a first substrate (10) with an organic light emissive material (12). A second self-supporting component is formed by coating a second substrate (2) with an organic material which is one of a light emissive material and a charge transport material (8). The two self-supporting components are laminated together such that the organic materials (8, 12) are located between the substrates (2, 10) in the finished device.
Claims13
A method of making a light emitting device comprising the laminating together of two self-supporting components, at least one of which has a light emitting layer (12,22,24) on an inner surface thereof, whereby the light emitting layer is located between the components in the finished device, wherein a first one of the self-supporting components is formed by providing on a first substrate (10) a light emissive material constituting the light emitting layer;
- and
- the, step of laminating together the two self-supporting components is such that the light emissive material is located between the components in the finished device, characterised in that the light emissive material is an organic material;
- a second one of the self-supporting components is formed by coating a second substrate (4) with an organic material (8,28) which is a charge transport material;
- and
- each of the self-supporting components includes a charge injecting electrode (6,10) for injecting charge carriers of respectively opposite types into the organic light emissive material.
An organic light emitting device comprising a self-supporting substrate acting as a first electrode (10) and carrying a first organic semiconductive layer (12,22,24), a second self-supporting substrate acting as a second electrode (4,6) and carrying a second organic layer (8,28), and arranged between the first and second organic layers a layer of adhesive (20), wherein the first organic semiconductive layer is a light emitting layer and the second organic layer is a charge transport layer.
A method of making a light emitting device comprising the laminating together of two self-supporting components (2,10), one of which provides a first charge injecting electrode (10) for the device and is formed by coating a first substrate (10) with an organic light emissive material (22) constituting a light emitting layer and a conducting polymer (28) constituting a charge transport layer, and the other of which provides a second charge injecting electrode (6) for the device, whereby the light emitting layer and the charge transport layer are located between the components in the finished device.
Dependencies are inferred from the claim text.