Composition and light emitting device using the same

Patent metadata

Field	Value
Publication number	US-10756269-B2
Application number	US-201615550936-A
Country	US
Kind code	B2
Filing date	Mar 1, 2016
Priority date	Mar 5, 2015
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A composition comprising an organic EL material, a solvent (A) represented by the formula (1), an aromatic hydrocarbon solvent (B) and an aromatic ether solvent (C):

[wherein R 1 represents an alkyl group having a number of carbon atoms of 10 to 12].

First claim

The invention claimed is:

1. A composition comprising
an organic EL material, wherein the organic EL material contains an iridium complex and a host material,
a solvent (A) represented by the formula (1),
an aromatic hydrocarbon solvent (B), wherein the aromatic hydrocarbon solvent (B) is a benzene derivative having a total number of carbon atoms of 7 to 15 and substituted with an alkyl group or a cycloalkyl group, and
an aromatic ether solvent (C) wherein the aromatic ether solvent (C) is at least one selected from the group consisting of: alkylaryl ethers having a total number of carbon atoms of 7 to 15 and in which the aryl portion is optionally substituted with an alkyl group; and diaryl ethers having a total number of carbon atoms of 12 to 15 and optionally substituted with an alkyl group:

wherein R 1 represents an alkyl group having a number of carbon atoms of 10 to 12; and
wherein the content of the solvent (A): wtA (by weight), the content of the aromatic hydrocarbon solvent (B): wtB (by weight) and the content of the aromatic ether solvent (C): wtC (by weight) satisfy the formula (1-1):
0.05≤wt A /(wt A +wt B +wt C )≤0.50  (1-1).

2. The composition according to claim 1 , wherein R 1 is an alkyl group having a number of carbon atoms of 10.

3. The composition according to claim 1 , wherein aromatic hydrocarbon solvent (B) is pentylbenzene, hexylbenzene, heptylbenzene, octylbenzene, nonylbenzene, cyclohexylbenzene or tetralin.

4. The composition according to claim 1 , wherein the aromatic ether solvent (C) is methylanisole, dimethylanisole, ethylanisole, butyl phenyl ether, butylanisole, pentylanisole, hexylanisole, heptylanisole, octylanisole or phenoxytoluene.

5. The composition according to claim 1 , wherein the host material is a polymer compound containing at least one constitutional unit selected from the group consisting of a constitutional unit represented by the formula (X) and a constitutional unit represented by the formula (Y):

wherein
a X1 and a X2 each independently represent an integer of 0 or more;
Ar X1 and Ar X3 each independently represent an arylene group or a divalent heterocyclic group, and the forgoing groups optionally have a substituent;
Ar X2 and Ar X4 each independently represent an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the forgoing groups optionally have a substituent, when a plurality of Ar X2 and Ar X4 are present, they may be the same or different at each occurrence;
R X1 , R X2 and R X3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, and the forgoing groups optionally have a substituent, when a plurality of R and R X3 are present, they may be the same or different at each occurrence; and
Ar Y1   (Y)

wherein Ar Y1 represents an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly, and the forgoing groups optionally have a substituent.

6. The composition according to claim 1 , wherein the iridium complex is an iridium complex represented by the formula (Ir-1), an iridium complex represented by the formula (Ir-2), an iridium complex represented by the formula (Ir-3), an iridium complex represented by the formula (Ir-4) or an iridium complex represented by the formula (Ir-5):

wherein
n D1 represents 1, 2 or 3, n D2 represents 1 or 2,
R D1 , R D2 , R D3 , R D4 , R D5 , R D6 , R D7 , R D8 , R D11 , R D12 , R D13 , R D14 , R D15 , R D16 , R D17 , R D18 , R D19 , R D20 , R D21 , R D22 , R D23 , R D24 , R D25 , R D26 , R D31 , R D32 , R D33 , R D34 , R D35 , R D36 and R D37 , each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group or a halogen atom, and the forgoing groups optionally have a substituent, when a plurality of R D1 , R D2 , R D3 , R D4 , R D5 , R D6 , R D7 , R D8 , R D11 , R D12 , R D13 , R D14 , R D15 , R D16 , R D17 , R D18 , R D19 , R D20 , R D21 , R D22 , R D23 , R D24 , R D25 , R D26 , R D31 , R D32 , R D33 , R D34 , R D35 , R D36 and R D37 are present, they may be the same or different at each occurrence; and

-A D1 -A D2 - represents an anionic bidentate ligand, A D1 and A D2 each independently represent a carbon atom, an oxygen atom or a nitrogen atom bonding to an iridium atom, and these atoms may be ring constituent atoms, when a plurality of -A D1 -A D2 - are present, they may be the same or different.

7. A light emitting device comprising a film formed by using the composition according to claim 1 .

8. A film formed surrounded by a liquid repellent partition wall by using the composition according to claim 1 .

Assignees

• Sumitomo Chemical Co

Inventors

• Saito Hiroyuki
• Ueoka Takahiro
• Kakimoto Hidenobu

Classifications

• H10K50/00

  Organic light-emitting devices (integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36) · CPC title

• H10K85/342

  comprising iridium · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09D11/36 Primary

  based on non-aqueous solvents · CPC title