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AssigneeMotorola, Inc.
InventorsSong Q. Shi, Franky So, Hsing-Chung Lee, Cynthia Gorsuch Briscoe
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An organic EL device includes a cathode, an organic electroluminescent layer and an anode, laminated in sequence. The organic layer is composed of a continuous organic medium A.sub.x B.sub.y, where A and B are components capable of transporting electrons and holes, respectively, x represents the content of the A component with a value ranging from 0 adjacent the anode to 100% adjacent the cathode, and y represents the content of the B component with a value ranging from 0 adjacent the cathode to 100% adjacent the anode. The lifetime of the device is improved by the elimination of heterojunctions in the continuous organic medium and suppression of the re-crystallization tendency of the organic materials. At least one fluorescent dye or pigment is incorporated in the organic layer to improve efficiency and color of the luminescence.
An organic medium for use in an electroluminescent display device comprising a layer of a continuous organic electroluminescent medium with a formula of A.sub.x B.sub.y and having a thickness defined by a first edge and an oppositely opposed spaced apart second edge, where A is a component capable of transporting electrons, B is a component capable of transporting holes, x represents the content of the A component in the layer of organic electroluminescent medium with a value ranging from 0 adjacent the first edge of the layer of organic electroluminescent medium to 100% adjacent the second edge of the layer of organic electroluminescent medium, and y represents the content of the B component in the layer of organic electroluminescent medium with a value ranging from 0 adjacent the second edge of the layer of organic electroluminescent medium to 100% adjacent the first edge of the layer of organic electroluminescent medium.
An organic medium for use in an electroluminescent display device comprising an organic electroluminescent layer having a thickness defined by a first side and an oppositely opposed spaced apart second side and formed of a continuous organic medium having a formula of A.sub.x B.sub.y, where A is a component capable of transporting electrons, B is a component capable of transporting holes, x represents the content of the A component in the medium, and y represents the content of the B component in the medium, where x plus y equal 100% of the continuous organic medium, and x has a value of a fraction of a percent adjacent the first side of the organic electroluminescent layer and y has a value of a fraction of a percent adjacent the second side of the organic electroluminescent layer.
An organic electroluminescent device comprising a cathode, an organic electroluminescent layer and an anode, laminated in sequence, wherein said organic electroluminescent layer is composed of a continuous organic medium having a formula of A.sub.x B.sub.y, where A is a component capable of transporting electrons, B is a component capable of transporting holes, x represents the content of the A component in the medium with a value ranging from 0 adjacent the anode to 100% adjacent the cathode, and y represents the content of the B component in the medium with a value ranging from 0 adjacent the cathode to 100% adjacent the anode.
An organic electroluminescent device comprising a cathode, an organic electroluminescent layer and an anode, laminated in sequence, wherein said organic electroluminescent layer is composed of a layer of a continuous organic medium having a formula of A.sub.x B.sub.y, where A is a component capable of transporting electrons, B is a component capable of transporting holes, x represents the content of the A component in the medium with a value ranging from 0 adjacent the anode to 100% adjacent the cathode, and y represents the content of B component in the medium with a value ranging from 0 adjacent the cathode to 100% adjacent the anode, and at least one fluorescent dye or pigment incorporated in the layer of organic electroluminescent medium.
An organic electroluminescent device comprising a cathode, an organic electroluminescent layer and an anode, laminated in sequence, said organic electroluminescent layer having a thickness defined by a first side and an oppositely opposed spaced apart second side and being formed of a continuous organic medium having a formula of A.sub.x B.sub.y, where A is a component capable of transporting electrons, B is a component capable of transporting holes, x represents the content of the A component in the medium, and y represents the content of the B component in the medium and where x plus y equal 100% of the continuous organic medium, and x has a value of a fraction of a percent adjacent the first side of the organic electroluminescent layer and y has a value of a fraction of a percent adjacent the second side of the organic electroluminescent layer.
Dependencies are inferred from the claim text.