Polymer, mixture and compound containing same, and organic electronic device and monomer thereof

Patent metadata

Field	Value
Publication number	US-2017358751-A1
Application number	US-201515532883-A
Country	US
Kind code	A1
Filing date	Dec 3, 2015
Priority date	Dec 4, 2014
Publication date	Dec 14, 2017
Grant date	—

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

1 . A polymer containing a repeating unit represented by chemical formula 1,

wherein 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.

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 structural formula (I):

Wherein 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; wherein when m>1, each D is independently of each other selected from the same or different electron donating groups, and when n>1, each A is independently of each other 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 of the following groups:

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

wherein n is an integer from 1 to 3, X 1 -X 8 are selected from CR 1 or N, and at least one of X 1 -X 8 is N, and wherein R 1 is selected from the following groups: 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 of the following groups:

wherein z is O or S.

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

9 . A formulation or a mixture, comprising:
a polymer according to claim 1 , and at least one organic solvent or at least one organic functional material that is selected from 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 . A formulation or mixture according to claim 9 comprising at least one singlet or triplet emitter.

11 - 12 . (canceled)

13 . A polymerizable monomer having the following general formula:

wherein the 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.

14 . The polymerizable monomer according to claim 13 , wherein (S1(E)−T1(E))≦0.25 eV.

15 . The polymerizable monomer according to claim 13 , wherein (S1(E)−T1(E))≦0.20 eV.

16 . The polymerizable monomer according to claim 13 , wherein (S1(E)−T1(E))≦0.10 eV.

17 . The polymer according to claim 1 having the general structural formula:

wherein x, y are the molar fractions, x+y=1, and G is an organic functional group, which can be selected from 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.

Assignees

• Guangzhou Chinaray Optoelectronic Mat Ltd

Inventors

• Pan Junyou
• Huang Hong

Classifications

• C08F212/26 Primary

  Nitrogen · CPC title

• C08F212/22

  Oxygen · CPC title

• C07D413/10

  linked by a carbon chain containing aromatic rings · CPC title

• C07C2603/18

  Fluorenes; Hydrogenated fluorenes · CPC title

• C07C49/798

  containing rings other than six-membered aromatic rings · CPC title