Polymer and organic electroluminescent element

Patent metadata

Field	Value
Publication number	US-9299933-B2
Application number	US-201414467503-A
Country	US
Kind code	B2
Filing date	Aug 25, 2014
Priority date	Feb 23, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

The present invention relates to a polymer comprising a repeating unit containing a specific partial structure and a repeating unit containing a crosslinking group, a composition for an organic electroluminescent element comprising the polymer, and an organic electroluminescent element comprising an organic layer formed using the composition for an organic electroluminescent element by a wet film formation method.

First claim

The invention claimed is:

1. A polymer, comprising:
a repeating unit having a partial structure represented by formula (1):

and
a repeating unit having a crosslinking group,
wherein, in formula (1):
Ar 1 , Ar 3 , Ar 4 , and Ar 5 each independently represent an aromatic hydrocarbon-cyclic group optionally having a substituent or an aromatic heterocyclic group optionally having a substituent;
Ar 2 represents an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent;
R 1 represents an alkyl group optionally having a substituent, or an alkoxy group optionally having a substituent;
R 2 to R 7 each independently represent a hydrogen atom, an alkyl group optionally having a substituent, an alkoxy group optionally having a substituent, an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent, wherein R 2 and R 3 may bond to each other to form a ring, R 4 and R 5 may bond to each other to form a ring, and R 6 and R 7 may bond to each other to form a ring;
l, m, and n each independently indicate an integer of from 0 to 2; and
multiple Ar 1 to Ar 5 or R 2 to R 7 may be the same or different.

2. The polymer according to claim 1 , wherein in the formula (1), at least one of l, m, and n is an integer differing from the others.

3. The polymer according to claim 1 , further comprising:
a repeating unit having a partial structure of formula (2):

wherein, in formula (2):
Ar 6 and Ar 7 each independently represent an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent;
Ar 8 represents an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent;
R 8 and R 9 each independently represent a hydrogen atom, an alkyl group optionally having a substituent, an alkoxy group optionally having a substituent, an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent;
R 8 and R 9 may bond to each other to form a ring;
p indicates an integer of from 0 to 2; and
multiple substituents of at least one of R 8 , R 9 , and Ar 7 may be the same or different.

4. The polymer according to claim 1 , wherein the crosslinking group is at least one group selected from crosslinking groups of the following formulae:

wherein:
R 21 to R 23 each independently represent a hydrogen atom, or an alkyl group optionally having a substituent;
A 10 represents an aromatic hydrocarbon-cyclic group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent; and
when multiple crosslinking groups and multiple R 21 to R 23 and Ar 10 are present, the multiple R 21 to R 23 and Ar 10 may be the same or different.

5. The polymer according to claim 1 , wherein the weight-average molecular weight (Mw) of the polymer is 20,000 or more, and the degree of dispersion (Mw/Mn, where Mn indicates the number-average molecular weight of the polymer) is 2.5 or less.

6. A material for organic electroluminescent element, comprising the polymer according to claim 1 .

7. A composition for organic electroluminescent element, comprising the polymer according to claim 1 .

8. An organic electroluminescent element, comprising:
a substrate;
an anode and a cathode on the substrate; and
an organic layer between the anode and the cathode,
wherein the organic layer contains a layer formed according to a wet film formation method using the composition for organic electroluminescent elements according to claim 7 .

9. The organic electroluminescent element according to claim 8 , wherein the layer formed according to a wet film formation method is at least one of a hole injection layer and a hole transport layer.

10. The organic electroluminescent element according to claim 9 , wherein the organic layer includes a hole injection layer, a hole transport layer, and a light-emitting layer, and
wherein all of the hole injection layer, the hole transport layer and the light-emitting layer are a layer formed according to a wet film formation method.

11. An organic EL display device, comprising the organic electroluminescent element according to claim 8 .

12. An organic EL lighting device, comprising the organic electroluminescent element according to claim 8 .

Assignees

• Mitsubishi Chem Corp

Inventors

• Baba Tatsushi
• Li Yanjun
• Iida Koichiro
• Gorohmaru Hideki
• NAKAMOTO Emi
• Shouda Takayuki

Classifications

• H10K85/111

  comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene · CPC title

• C08G73/0266 Primary

  Polyanilines or derivatives thereof · CPC title

• H01L51/0043

  Electricity · mapped topic

• H01L51/5092

  Electricity · mapped topic

• H01L51/5056

  Electricity · mapped topic