Organic electroluminescence element, display device and lighting device
View Patent ↗In an organic electroluminescence element which incorporates a substrate having thereon an anode and a cathode and which incorporates a plurality of organic layers between the aforesaid anode and cathode, wherein at least one of the aforesaid organic layers is a first organic layer incorporating a compound having at most 10 repeating units, the first organic layer being prepared by coating the compound having at least one polymerizable group, followed by polymerization.
1. An organic electroluminescence element comprising a substrate having thereon an anode, a cathode and a plurality of organic layers between the anode and the cathode,
wherein a first organic layer is provided by coating:
a first oligomer compound made of 2 to 10 repeating units and having at least one polymerizable group, or
a first compound having one reactive group, followed by polymerization, and
a second organic layer is stacked on the first organic layer, wherein the second layer is provided by coating:
a second oligomer compound made of 2 to 10 repeating units and having at least one polymerizable unit, or
a second compound having one reactive group, followed by polymerization,
provided that a portion of an interface between the first organic layer and the second layer is bonded through a covalent bond.
2. The organic electroluminescence element of claim 1 ,
wherein the polymerizable group in the first or the second compound is a vinyl group.
3. The organic electroluminescence element of claim 1 , wherein the coating of the first organic layer is carried out by employing an ink-jet recording method.
4. The organic electroluminescence element of claim 1 , wherein the polymerization is carried out via exposure to an energy ray.
5. The organic electroluminescence element of claim 4 , wherein the energy ray is one selected from the group consisting of a ultraviolet ray, an electron beam, an ion beam, a heat ray, a radical beam and a radioactive ray.
6. The organic electroluminescence element of claim 1 , wherein the first compound contained in the first organic layer is an aromatic compound having a tertiary amine group; and the second compound contained in the second organic layer is a compound having an organic metal complex structure.
7. The organic electroluminescence element of claim 1 , further comprising a phosphorescent compound in the first organic layer or in the second organic layer.
8. The organic electroluminescence element of claim 1 , wherein the first organic layer is an electron transporting layer and the second organic layer is a positive hole transporting layer.
9. The organic electroluminescence element of claim 1 , wherein the repeating units in the first oligomer compound and the second oligomer compound each are derived from at least one selected from the group consisting of:
10. The organic electroluminescence element of claim 1 , wherein the substrate is a transparent gas barrier film.
11. The organic electroluminescence element of claim 1 , wherein the organic electroluminescence element emits a white light.
12. A display device comprising the organic electroluminescence element of claim 11 .
13. A lighting device comprising the electroluminescence element of claim 11 .
14. A display device comprising:
a liquid crystal element as a display means; and the lighting device of claim 13 .