Organic electroluminescence device and anthracene derivative
An organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer comprising a light emitting layer and disposed between the cathode and the anode, wherein at least one layer in the organic thin film layer comprises an anthracene derivative having a specific structure singly or as a component of a mixture, and an anthracene derivative having a specific asymmetric structure and providing an organic electroluminescence device exhibiting a great efficiency of light emission and having a long life, are provided.
1. An organic electroluminescence device which comprises:
a cathode,
an anode and
an organic thin film layer disposed between the cathode and the anode,
wherein:
the organic thin film layer comprises at least one layer which comprises a light emitting layer;
the light emitting layer comprises a host and a dopant;
the host is at least one anthracene derivative of formula (2):
wherein:
Ar is an unsubstituted 1-naphthyl group or an unsubstituted 2-naphthyl group;
Ar′ is an unsubstituted 1-naphthyl group or an unsubstituted 2-naphthyl group;
a is 0;
b is 0;
n is 1; and
the dopant is at least one arylamine compound of formula (B):
wherein:
Ar 5 to Ar 7 are each independently a substituted or unsubstituted aryl group having 5 to 40 nuclear carbon atoms; and
q is an integer of 1 to 4.
2. The organic electroluminescence device according to claim 1 , wherein q is 2.
3. The organic electroluminescence device according to claim 1 , wherein Ar 5 is a pyrenyl group.
4. The organic electroluminescence device according to claim 1 , wherein Ar 6 and Ar 7 are each independently a phenyl group or a naphthyl group.
5. The organic electroluminescence device according to claim 1 , wherein the substituent of Ar 5 to Ar 7 is independently an alkyl group having 1 to 6 carbon atom or a phenyl group.
6. The organic electroluminescence device according to claim 1 , wherein:
q is 2;
Ar 5 is a pyrenyl group;
Ar 6 and Ar 7 are each independently a phenyl group or a naphthyl group; and
the substituent of Ar 5 to Ar 7 is independently an alkyl group having 1 to 6 carbon atom or a phenyl group.