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US 7,255,939 B2Granted
Organic light-emitting devices
AssigneeCambridge Display Technology Limited
InventorsJulian Charles Carter, Jeremy Henley Burroughes, Stephen Karl Heeks
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AssigneeCambridge Display Technology Limited
InventorsJulian Charles Carter, Jeremy Henley Burroughes, Stephen Karl Heeks
Estimating the term…
An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer having a high resistance adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer comprising a high-resistance material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.
An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer having a product of resistivity and thickness in the range of 0.005 to 10 Ω·cm2, and comprising a material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.
An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a thin first electrode layer comprising a low work function material adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, and a second electrode layer adjacent the surface of the first electrode layer remote from the light-emissive organic layer, said second electrode layer having a product of resistivity and thickness in the range of 0.005 to 10 Ω·cm2, and comprising a material selected from the group consisting of a semiconductor material, a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material and a conductor material.
Dependencies are inferred from the claim text.