Polymer, and mixture or formulation, and organic electronic device containing same, and monomer thereof

Patent metadata

Field	Value
Publication number	US-10840450-B2
Application number	US-201515532883-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 4, 2014
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

Disclosed are a polymer, and a mixture or a formulation and an organic electronic device containing same, and applications thereof, and further a monomer of which the polymer is made; the polymer comprises on its side chain a repeating structure unit E, characterizing in that its S1(E)−T1(E))≤0.35 eV or even less, which may allow the said polymer having thermally activated delayed fluorescence (TADF) property. Thus a TADF polymer suitable for printing processes is provided, thereby reducing OLED manufacturing costs.

First claim

The invention claimed is:

1. A polymer having the following general structural formula:

wherein E is a structural unit,
the energy difference between the singlet energy level and the triplet energy level of the structural unit E, i.e. (S1(E)−T1(E)), is less than or equal to 0.35 eV,
x and y are the molar fractions,
x+y=1, and
G is an organic functional group selected from the group consisting of a hole-injecting or hole-transporting group, a hole-blocking group, an electron-injecting or electron-transporting group, an electron-blocking group, an organic host group, a singlet emitter group, and a triplet emitter group.

2. The polymer according to claim 1 , wherein (S1(E)−T1(E))≤0.25 eV.

3. The polymer according to claim 1 , wherein the structural unit E contains at least one electron donating group D and at least one electron accepting group A.

4. The polymer according to claim 1 , wherein the structural unit E contains a structural unit represented by the structural formula (I):

where Ar is an aromatic or heteroaromatic structural unit,
D is an electron donating group,
A is an electron accepting group,
each of n and m is an integer between 1 and 6,
when m>1, each D is independently selected from the same or different electron donating groups, and
when n>1, each A is independently selected from the same or different electron accepting groups.

5. The polymer according to claim 3 , wherein the electron donating group D is selected from structural units containing any one of the following groups:

6. The polymer according to claim 3 , wherein the electron accepting group A is selected from the group consisting of F, cyano group, and structural units containing any one of the following groups:

wherein n1 is an integer from 1 to 3, X 1 -X 8 are CR 1 or N, at least one of X 1 -X 8 is N, and R 1 is selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, aralkyl, heteroalkyl, aryl, and heteroaryl.

7. The polymer according to claim 4 , wherein Ar is selected from structural units containing any one of the following groups:

where z is O or S.

8. The polymer according to claim 1 , wherein the structural unit E is selected from structural units containing any one of the following structural formulas:

9. A mixture, comprising:
the polymer according to claim 1 ; and
at least one organic functional material that is selected from the group consisting of a hole-injecting or hole-transporting material, a hole-blocking material, an electron-injecting or electron-transporting material, an electron-blocking material, an organic host material, a singlet emitter, and a triplet emitter.

10. The mixture according to claim 9 , wherein the at least one organic functional material is a singlet emitter or a triplet emitter.

11. A formulation comprising the polymer according to claim 1 and at least one organic solvent.

Assignees

• Guangzhou Chinaray Optoelectronic Mat Ltd

Inventors

• Pan Junyou
• Huang Hong

Classifications

• C08F212/26 Primary

  Nitrogen · CPC title

• C08F212/22

  Oxygen · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• C09K2211/14

  Macromolecular compounds · CPC title

• C08F212/32

  containing two or more rings · CPC title