Benzanthracene derivative and electroluminescence device using the same
AssigneeIdemitsu Kosan Co., Ltd.
InventorMineyuki Kubota
Life of this patent
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Abstract
A benzanthracene derivative having hydrogen atom at the 12-position, and an organic electroluminescence device having an organic thin film layer, which has one layer or a plurality of layers including at least a light emitting layer, is disposed between a cathode and an anode and contains the benzanthracene derivative in at least one layer in the organic thin film layer singly or as a component of a mixture. The electroluminescence device provides a great efficiency of light emission, has a long life and exhibits an excellent chromaticity.
Claims9
An organic electroluminescence device comprising a cathode, an anode and an organic thin film layer which comprises one layer or a plurality of layers comprising at least a light emitting layer and is disposed between the cathode and the anode, wherein the organic thin film layer comprises at least one benzanthracene derivative having hydrogen atom at a 12-position which is represented by formula (1):
- wherein
- R1 to R10 each independently represent hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon cyclic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 nuclear carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 nuclear carbon atoms, a substituted or unsubstituted arylthio group having 5 to 50 nuclear carbon atoms, a substituted or unsubstituted alkoxycarbonyl group having 1 to 50 carbon atoms, a substituted or unsubstituted silyl group 1 to 50 carbon atoms, carboxy group, a halogen atom, cyano group, nitro group or hydroxy group;
- L represents a linking group, which is a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon cyclic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted divalent aromatic heterocyclic group having 5 to 50 nuclear atoms, a substituted or unsubstituted fluorenylene group or a substituted or unsubstituted carbazolylene group;
- n represents an integer of 1 to 4 and, when n represents an integer of 2 or greater, a plurality of linking groups represented by L may be same with or different from each other;
- Ar represents a single bond, hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon cyclic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, fluorenyl group or carbazolyl group;
- and
- m represents an integer of 1 to 4 and, when m represents an integer of 2 or greater, a plurality of atoms and groups represented by R1 to R10 and L may be same with or different from each other,
- the light emitting layer comprises a styrylamine compound represented by formula (A):
- wherein Ar3 represents a group selected from phenyl group, biphenyl group, terphenyl group, stilbene group and distyrylaryl groups, Ar4 and Ar5 each represent hydrogen atom or an aromatic hydrocarbon group having 6 to 20 carbon atoms, the groups represented by Ar3, Ar4 and Ar5 may be substituted, p represents an integer of 1 to 4, or
- the light emitting layer comprises an arylamine compound represented by formula (B)
- wherein Ar6 to Ar8 each represent a substituted or unsubstituted aryl group having 5 to 40 nuclear carbon atoms, and q represents an integer of 1 to 4.
Dependencies are inferred from the claim text.