ORGANIC ELECTROLUMINESCENT DEVICE
First Claim
1. An organic electroluminescent device comprising an anode, a plurality of organic layers, and a cathode piled one upon another on a substrate wherein the plurality of organic layers comprise an organic layer containing a carbazole compound having aromatic groups selected from aromatic hydrocarbon groups and aromatic heterocyclic groups, at least one of the said aromatic groups having a fused ring structure composed of two rings or more, as substituents at the 1 and 9 positions of the carbazole ring and having the total of 20 to 80 carbon atoms and the organic layer containing the carbazole compound is a light-emitting layer containing a phosphorescent dopant.
3 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. The organic EL device of this invention comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate wherein the light-emitting layer contains a phosphorescent dopant and a 1,9-substituted carbazole compound as a host material. An example of the 1,9-substituted carbazole compound is represented by the following general formula (1). In formula (1), Ar is an aromatic hydrocarbon group or aromatic heterocyclic group; L is an aromatic hydrocarbon group or aromatic heterocyclic group; each of R1 to R3 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group; n is an integer of 1 to 3.
16 Citations
8 Claims
- 1. An organic electroluminescent device comprising an anode, a plurality of organic layers, and a cathode piled one upon another on a substrate wherein the plurality of organic layers comprise an organic layer containing a carbazole compound having aromatic groups selected from aromatic hydrocarbon groups and aromatic heterocyclic groups, at least one of the said aromatic groups having a fused ring structure composed of two rings or more, as substituents at the 1 and 9 positions of the carbazole ring and having the total of 20 to 80 carbon atoms and the organic layer containing the carbazole compound is a light-emitting layer containing a phosphorescent dopant.
-
7. (canceled)
-
8. (canceled)
Specification