Organic electroluminescence device
First Claim
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1. A display device comprising:
- a plurality of light emission units, each unit including an organic layer and an electron injecting layer, the plurality of light emission units laminated between an anode and a cathode; and
a connection layer provided between each of the light emission units,wherein,the organic layer in each light emission unit includes a hole injection layer, a hole transporting layer, a light emission layer, an electron transporting layer in direct succession in the recited order,the electron injecting layer in each light emission unit and the connecting layer each includes the following layers successively laminated including (1) a buffer layer of a thickness of 1 nm or less in contact with at least the organic layer of one light emission unit, the buffer layer (a) employing an oxide which contains at least one of an alkali metal and an alkaline-earth metal, and (b) the buffer layer having a hole blocking property resulting from disposing the buffer layer in contact with the organic layer, (2) a mixed layer employing a charge transporting organic material having an electron transporting property and a metal material having an electron injecting property, the metal material reacts while reducing the charge transporting organic material to become transparent to ensure the electron injecting property, and (3) a protective layer,the protective layer of the connection layer has a triphenylene layer containing at least one of triphenylene derivatives and azatriphenylene derivatives represented by the following general formula (1) as a boundary layer of the cathode side;
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Abstract
An organic electroluminescence device including a lower electrode disposed on a substrate, an organic layer having at least a light emission layer and disposed above the lower electrode, and upper electrode having a transparent conductive film and disposed above the organic layer, in which the device has an electron injecting layer between the organic layer and the upper electrode. The electron injecting layer has a buffer layer comprising an insulative material and a mixed layer comprising an organic material that has an electron transporting property and a metal material that has an electron injecting property.
16 Citations
21 Claims
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1. A display device comprising:
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a plurality of light emission units, each unit including an organic layer and an electron injecting layer, the plurality of light emission units laminated between an anode and a cathode; and a connection layer provided between each of the light emission units, wherein, the organic layer in each light emission unit includes a hole injection layer, a hole transporting layer, a light emission layer, an electron transporting layer in direct succession in the recited order, the electron injecting layer in each light emission unit and the connecting layer each includes the following layers successively laminated including (1) a buffer layer of a thickness of 1 nm or less in contact with at least the organic layer of one light emission unit, the buffer layer (a) employing an oxide which contains at least one of an alkali metal and an alkaline-earth metal, and (b) the buffer layer having a hole blocking property resulting from disposing the buffer layer in contact with the organic layer, (2) a mixed layer employing a charge transporting organic material having an electron transporting property and a metal material having an electron injecting property, the metal material reacts while reducing the charge transporting organic material to become transparent to ensure the electron injecting property, and (3) a protective layer, the protective layer of the connection layer has a triphenylene layer containing at least one of triphenylene derivatives and azatriphenylene derivatives represented by the following general formula (1) as a boundary layer of the cathode side; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20, 21)
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10. A display device comprising:
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a plurality of light emission units laminated between a cathode and an anode, where each light emission unit comprises at least an organic light emission layer; and a connection layer is between the respective light emission units, wherein, the organic light emission layer in each light emission unit includes a hole injection layer, a hole transporting layer, a light emission layer, an electron transporting layer in direct succession in the recited order, beginning on the anode, the connection layer having a laminate part comprising (1) a buffer layer of a thickness of 1 nm or less in contact with the organic light emission layer, the buffer layer (a) employing an oxide which contains at least one of an alkali metal and an alkaline-earth metal, and (b) the buffer layer having a hole blocking property resulting from disposing the buffer layer in contact with the organic light emission layer, (2) a mixed layer employing a charge transporting organic material having an electron transporting property and a metal material having an electron injecting property, the mixed layer being composed of the same material as the electron transporting layer in the organic light emission layer, the metal material reacts while reducing the charge transporting organic material to become transparent to ensure the electron injecting property, and (3) a protective layer employing at least one of triphenylene derivatives and azatriphenylene derivatives, the protective layer is oxidized to become light permeable to prevent oxidation of the mixed layer, are successively laminated from the anode side in direct succession. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification