Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic EL display device, and organic EL lighting device
The object of the present invention is to provide a polymer capable of being insolubilized at a low temperature in a short time, having a high hole injecting and transporting ability and a high durability, and a composition for organic electroluminescent element comprising the polymer. The polymer of the present invention comprises a specific crosslinkable group.
1. A polymer having a crosslinkable group represented by the following formula (1):
wherein the 1,2-dihydrocyclobuta[a]naphthalene ring may have a substituent.
2. The polymer according to claim 1 , which comprises a repeating unit represented by the following formula (2):
wherein p represents an integer of 0 to 3,
Ar 1 and Ar 2 each independently represent a direct bond, an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent,
Ar 3 to Ar 5 each independently represent an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent, and
the Ar 1 and Ar 2 are not direct bonds at the same time.
3. The polymer according to claim 1 , which comprises a repeating unit represented by the following formula (3):
wherein q represents an integer of 0 to 3,
R 1 represents an alkyl group of 1 to 24 carbon atoms that may have a substituent, an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent,
Ar 6 and Ar 7 each independently represents a direct bond, an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent,
Ar 8 to Ar 12 each independently represents an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent, and
the Ar 6 and Ar 7 are not direct bonds at the same time.
4. The polymer according to claim 1 , which comprises a repeating unit represented by the following formula (4):
wherein r represents an integer of 0 to 3,
Ar 13 , Ar 14 , Ar 16 , and Ar 17 each independently represent an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent, and
Ar 15 represents a direct bond, an aromatic hydrocarbon group that may have a substituent, or an aromatic heterocyclic group that may have a substituent.
5. The polymer according to claim 1 , which has a weight-average molecular weight (Mw) of 20,000 or more, and a degree of dispersion (Mw/Mn) of 2.5 or less.
6. A composition for organic electroluminescent element, which comprises the polymer of claim 1 .
7. An organic electroluminescent element comprising a substrate, an anode and a cathode provided on the substrate, and an organic layer provided between the anode and the cathode, wherein the organic layer contains a layer formed by a wet film formation method using the composition for organic electroluminescent elements of claim 6 .
8. The organic electroluminescent element according to claim 7 , wherein the layer formed by a wet film formation method is at least one of a hole injection layer and a hole transport layer.
9. The organic electroluminescent element according to claim 7 , which comprises a hole injection layer, a hole transport layer and a light-emitting layer between the anode and the cathode, wherein the hole injection layer, the hole transport layer, and the light-emitting layer are all formed by a wet film formation method.
10. An organic EL display device comprising the organic electroluminescent element of claim 7 .
11. An organic EL lighting device comprising the organic electroluminescent element of claim 7 .
12. A compound represented by the following formula (5):
wherein X represents a halogen atom.