Material for organic electroluminescence device and organic electroluminescence device using the same

摘要

Provided are an organic electroluminescence device, which shows high luminous efficiency, is free of any pixel defect, and has a long lifetime, and a material for an organic electroluminescence device for realizing the device. The material for an organic electroluminescence device is a compound having a n-conjugated heteroacene skeleton crosslinked with a carbon atom, nitrogen atom, oxygen atom, or sulfur atom. The organic electroluminescence device has one or more organic thin film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin film layers contains the material for an organic electroluminescence device.

主权项

1. A material for an organic electroluminescence device represented by the formula (5): wherein: X5 and X6 represent N—R1; R1 represents a substituted or unsubstituted aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms or a substituted or unsubstituted aromatic heterocyclic group having a ring formed of 3 to 24 atoms, provided that, at least, one R1 represents a substituted or unsubstituted dibenzofuranyl or a substituted or unsubstituted dibenzothiophenyl; L1 represents a single bond, a substituted or unsubstituted, monovalent or divalent aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms, or a substituted or unsubstituted, monovalent or divalent aromatic heterocyclic group which has a ring formed of 3 to 24 atoms and which is linked with a benzene ring a through a carbon-carbon bond; L2 represents a single bond, a substituted or unsubstituted, monovalent or divalent aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms, or a substituted or unsubstituted, monovalent or divalent aromatic heterocyclic; group which has a ring formed of 3 to 24 atoms and which is linked with a benzene ring c through a carbon-carbon bond; A1 represents a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms, or an aromatic heterocyclic group which has a ring formed of 3 to 24 atoms and which is linked with L1 through a carbon-carbon bond; A2 represents a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms, or an aromatic heterocyclic group which has a ring formed of 3 to 24 atoms and which is linked with L2 through a carbon-carbon bond; Y1, Y2, and Y3 each represent a substituted or unsubstituted aromatic hydrocarbon group having a ring formed of 6 to 24 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic group which has a ring formed of 3 to 24 atoms and which is linked with the benzene ring a, b, or c through a carbon-carbon bond, a number of each of Y1 and Y3 is 0, 1, 2, or 3, a number of Y2 is 0, 1, or 2, and a total number of Y1, Y2, and Y3 is 3 or less; and A1, A2, L1, and L2 are each free of any carbonyl group.