Aromatic amine derivatives and electroluminescence device using the same
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasahiro Kawamura, Masakazu Funahashi
Life of this patent
Estimating the term…
Abstract
An aromatic amine derivative with a specific structure and an organic electroluminescence device which comprises at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein at least one of the organic thin film layer comprises the aromatic amine derivative singly or as its mixture component. The organic electroluminescence device which exhibits an enhanced current efficiency of light emission and emits blue light with a prolonged lifetime is realized.
Claims5
An aromatic amine derivative represented by the following general formula (1):
- wherein Ar1 to Ar4 each independently represents a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring carbon atoms;
- L1 represents a single bond;
- L2 represents a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms;
- when both L1 and L2 are single bonds, however, a case where both Ar1 and Ar3 each represents a substituted or unsubstituted phenyl group and further, where both Ar2 and Ar4 each represents a substituted or unsubstituted biphenylyl group or a substituted or unsubstituted phenyl group is excluded;
- Ra represents a substituent and when Ra exists two or more, they may bond each other to form a ring;
- and
- n represents an integer of 0 to 8.
An aromatic amine derivative represented by the following general formula (2) or by the following general formula (3):
- wherein Ar5 to Ar15 each independently represents a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring carbon atoms;
- L3 to L7 each independently represents a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms;
- and further, at least one of L3 or L4 in the general formula (2) or at least one of L5 to L7 in the general formula (3) is a coupling group expressed by a following general formula (4):
- wherein L8 and L9 each independently represents a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms;
- Ra represents a substituent and when Ra exists two or more, they may bond each other to form a ring;
- and
- n represents an integer of 0 to 8.
An aromatic amine derivative represented by the following general formula (5):
- wherein Ar16 to Ar19 each independently represents a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring carbon atoms;
- L10 represents a single bond;
- L11 represents a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms;
- Ra represents a substituent and when Ra exists two or more, they may bond each other to form a ring;
- and
- n represents an integer of 0 to 8.
Dependencies are inferred from the claim text.