Organic el element, organic el display panel, and organic el element manufacturing method
AssigneeJoled Inc.
InventorKosuke MISHIMA
Life of this patent
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Abstract
An organic electroluminescence (EL) element including an anode, a first functional layer disposed on or above the anode, a light-emitting layer disposed on or above the first functional layer, a second functional layer disposed on or above the light-emitting layer, and a cathode disposed on or above the second functional layer. The first functional layer has at least one of a property of facilitating hole injection and a property of facilitating hole transportation. The light-emitting layer includes an organic light-emitting material doped with an electron donating material. The second functional layer includes a rare earth metal.
Claims20
An organic electroluminescence (EL) element comprising:
- an anode;
- a first functional layer disposed on or above the anode, the first functional layer having at least one of a property of facilitating hole injection and a property of facilitating hole transportation;
- a light-emitting layer disposed on or above the first functional layer, the light-emitting layer including an organic light-emitting material doped with an electron donating material;
- a second functional layer disposed on or above the light-emitting layer, the second functional layer including a rare earth metal;
- and
- a cathode disposed on or above the second functional layer.
An organic electroluminescence (EL) display panel comprising:
- a substrate;
- organic EL elements arranged on or above the substrate in a matrix of rows and columns;
- and
- banks arranged on or above the substrate that extend in a column direction, wherein
- each of the organic EL elements comprises:
- an anode;
- a first functional layer disposed on or above the anode, the first functional layer having at least one of a property of facilitating hole injection and a property of facilitating hole transportation;
- a light-emitting layer disposed on or above the first functional layer, the light-emitting layer including an organic light-emitting material doped with an electron donating material;
- a second functional layer disposed on or above the light-emitting layer, the second functional layer including a rare earth metal;
- and
- a cathode disposed on or above the second functional layer, and
- the banks separate the light-emitting layers of the organic EL elements in a row direction.
An organic electroluminescence (EL) element manufacturing method comprising:
- forming an anode;
- forming a first functional layer on or above the anode, the first functional layer having at least one of a property of facilitating hole injection and a property of facilitating hole transportation;
- forming an organic light-emitting material layer on the first functional layer, the organic light-emitting material layer being made of an organic light-emitting material;
- forming an intermediate layer on the organic light-emitting material layer, the intermediate layer including a metal compound including a first metal selected from the group consisting of alkali metals and alkaline earth metals;
- forming a second functional layer on the intermediate layer, the second functional layer including a second metal that is a rare earth metal;
- and
- forming a cathode on or above the second functional layer, wherein
- an electron donating material containing layer is formed from a portion of the organic light-emitting material layer by diffusion of the first metal, or the first metal and the second metal, into the organic light-emitting material layer until a carrier density in the portion of the organic light-emitting material layer is from 1012/cm3 to 109/cm3.
An organic electroluminescence (EL) element manufacturing method comprising:
- forming an anode;
- forming a first functional layer on or above the anode, the first functional layer having at least one of a property of facilitating hole injection and a property of facilitating hole transportation;
- forming an organic light-emitting material layer on the first functional layer, the organic light-emitting material layer being made of an organic light-emitting material;
- forming a second functional layer on the organic light-emitting material layer, the second functional layer including a rare earth metal;
- and
- forming a cathode on or above the second functional layer, wherein
- an electron donating material containing layer is formed from a portion of the organic light-emitting material layer by diffusion of the first metal, or the first metal and the second metal, into the organic light-emitting material layer until a carrier density in the portion of the organic light-emitting material layer is from 1012/cm3 to 1019/cm3.
Dependencies are inferred from the claim text.