Organic electroluminescent device
View Patent ↗Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The device comprises a plurality of organic layers between an anode and a cathode piled one upon another on a substrate wherein at least one of the organic layers contains a nitrogen-containing organic compound represented by the following formula (1). In formula (1), X is N-A, an oxygen atom, or a sulfur atom; A is an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group.
1. An organic electroluminescent device comprising an anode, a plurality of organic layers, and a cathode piled one upon another on a substrate wherein at least one of the organic layers contains a compound represented by the following general formula (1);
In general formula (1), X is N-A, an oxygen atom, or a sulfur atom; each A is independently an alkyl group of 1 to 10 carbon atoms, a cycloalkyl group of 3 to 11 carbon atoms, an aromatic hydrocarbon group of 6 to 30 carbon atoms, or an aromatic heterocyclic group of 3 to 30 carbon atoms exclusive of a fused heterocycle consisting of 4 rings or more; each R is independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, a cycloalkyl group of 3 to 11 carbon atoms, an aromatic hydrocarbon group of 6 to 18 carbon atoms, or an aromatic heterocyclic group of 3 to 18 carbon atoms exclusive of a fused heterocycle consisting, of 4 rings or more.
2. An organic electroluminescent device as described in claim 1 wherein, in general formula (1), each A is independently an aromatic hydrocarbon group of 6 to 30 carbon atoms or an aromatic heterocyclic group of 3 to 30 carbon atoms exclusive of a fused heterocycle consisting of 4 rings or more.
3. An organic electroluminescent device as described in claim 2 wherein the layer containing a compound represented by general formula (1) is at least one layer selected, from the group consisting of a light-emitting layer, a hole-transporting layer, and an electron-blocking layer.
4. An organic electroluminescent device as described in claim 3 wherein the layer containing a compound represented by general formula (1) is a light-emitting layer containing a phosphorescent dopant.
5. An organic electroluminescent device as described in claim 1 wherein, in general formula (1), X is N-A.
6. An organic electroluminescent device as described in claim 5 wherein the layer containing a compound represented by general formula (1) is at least one layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, and an electron-blocking layer.
7. An organic electroluminescent device as described in claim 6 wherein the layer containing a compound represented by general formula (1) is a light-emitting layer containing a phosphorescent dopant.
8. An organic electroluminescent device as described in claim 1 wherein, in general formula (1), X is an oxygen atom or a sulfur atom.
9. An organic electroluminescent device as described in claim 8 wherein the layer containing a compound represented by general formula (1) is at least one layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, and an electron-blocking layer.
10. An organic electroluminescent device as described in claim 9 wherein the layer containing a compound represented by general formula (1) is a light-emitting layer containing a phosphorescent dopant.
11. An organic electroluminescent device as described in claim 1 wherein the layer containing a compound represented by general formula (1) is at least one layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, and an electron-blocking layer.
12. An organic electroluminescent device as described in claim 11 wherein the layer containing a compound represented by general formula (1) is a light-emitting layer containing a phosphorescent dopant.