Composition containing polymer compound and light-emitting device using the same

Patent metadata

Field	Value
Publication number	US-9691983-B2
Application number	US-201113809971-A
Country	US
Kind code	B2
Filing date	Jul 13, 2011
Priority date	Jul 16, 2010
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

It is an object of the present invention to provide a composition using a polymer compound, which is useful for manufacturing a blue phosphorescent light-emitting device excellent in luminous efficiency. The present invention provides a composition including: a polymer compound substantially consisting of a constitutional unit selected from a constitutional unit represented by Formula (1)-1 below, a constitutional unit represented by Formula (1)-2 below, a constitutional unit represented by Formula (2)-1 below, a constitutional unit represented by Formula (2)-2 below, and a constitutional unit derived from a phosphorescent light-emitting compound having a light-emitting spectrum peak at smaller than 480 nm and the polymer compound containing at least both of the constitutional unit represented by Formula (1)-1 and the constitutional unit represented by Formula (1)-2; and a phosphorescent light-emitting compound having a light-emitting spectrum peak at smaller than 480 nm.

First claim

The invention claimed is:

1. A composition comprising a polymer compound, a phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm, a phosphorescent light-emitting compound that has a light-emitting spectrum peak at 480 nm or larger and smaller than 580 nm, and a phosphorescent light-emitting compound that has a light-emitting spectrum peak at 580 nm or larger and smaller than 680 nm,
wherein:
the polymer compound comprises greater than 50% (by molarity) of constitutional units that are selected from among a constitutional unit represented by Formula (1)-1, a constitutional unit represented by Formula (1)-2, a constitutional unit represented by Formula (2)-1, and a constitutional unit represented by Formula (2)-2;
the polymer compound contains at least both the constitutional unit represented by Formula (1)-1 and the constitutional unit represented by Formula (1)-2; and
a ratio of a total weight of the phosphorescent light-emitting compound that has a light-emitting spectrum peak at 480 nm or larger and smaller than 580 nm and the phosphorescent light-emitting compound that has a light-emitting spectrum peak at 580 nm or larger and smaller than 680 nm relative to a weight of the phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm is 0.01 to 0.3;

wherein
R 1 represents an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, or a cyano group, and two or more R 1 s that are present in the polymer compound may be the same as or different from each other;
R 2 represents a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an alkoxy group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, a fluorine atom, or a cyano group, and two or more R 2 s that are present in the polymer compound may be the same as or different from each other;
R 3 represents an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group, and when two or more R 3 s are present in the polymer compound, R 3 s may be the same as or different from each other;
R 4 and R 5 each independently represent a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an alkoxy group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, a fluorine atom, or a cyano group, and when two or more R 4 s are present in the polymer compound, R 4 s may be the same as or different from each other, and two or more R 5 s that are present in the polymer compound may be the same as or different from each other;
R 6 represents a hydrogen atom, an alkoxy group, or a fluorine atom, and two or more R 6 s that are present in the polymer compound may be the same as or different from each other; and
R 7 represents a hydrogen atom, an alkoxy group, an aryloxy group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, or a fluorine atom, and when two or more R 7 s are present in the polymer compound, R 7 s may be the same as or different from each other.

2. The composition according to claim 1 , wherein R 1 is an alkyl group, an aryl group, or an aralkyl group.

3. The composition according to claim 1 , wherein R 2 is a hydrogen atom.

4. The composition according to claim 1 , wherein R 3 is an alkyl group, an aryl group, or an aralkyl group.

5. The composition according to claim 4 , wherein R 3 is a methyl group.

6. The composition according to claim 1 , wherein R 5 is a hydrogen atom.

7. The composition according to claim 1 , wherein R 4 is a group represented by Formula (3) and/or a group represented by Formula (4):

wherein
R 8 and R 9 each independently represent an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group;
two R 8 s that are present in Formula (3) are optionally linked together; two or more R 8 s that are present in the polymer compound may be the same as or different from each other;
two R 9 s that are present in Formula (4) are optionally linked together; and two or more R 9 s that are present in the polymer compound, may be the same as or different from each other.

8. The composition according to claim 1 , wherein a ratio of a total number of moles of the constitutional unit represented by Formula (1)-2 and the constitutional unit represented by Formula (2)-2 relative to a total number of moles of the constitutional unit represented by Formula (1)-1 and the constitutional unit represented by Formula (2)-1 is 0.1 to 9.0.

9. The composition according to claim 7 , wherein a ratio of a total number of moles of: the constitutional unit represented by Formula (1)-2 and the constitutional unit represented by Formula (2)-2 in which R 4 is the group represented by Formula (3); and the constitutional unit represented by Formula (1)-2 and the constitutional unit represented by Formula (2)-2 in which R 4 is the group represented by Formula (4),
relative to a total number of moles of: the constitutional unit represented by Formula (1)-1; the constitutional unit represented by Formula (2)-1; the constitutional unit represented by Formula (1)-2 in which R 4 is neither the group represented by Formula (3) nor the group represented by Formula (4); and the constitutional unit represented by Formula (2)-2 in which R 4 is neither the group represented by Formula (3) nor the group represented by Formula (4),
is 0.1 to 9.0.

10. The composition according to claim 7 , wherein a ratio of a total number of moles of the constitutional unit represented by Formula (1)-2 and the constitutional unit represented by Formula (2)-2 in which R 4 is the group represented by Formula (3), relative to a total number of moles of the constitutional unit represented by Formula (1)-2 and the constitutional unit represented by Formula (2)-2 in which R 4 is the group represented by Formula (4), is 0.1 to 9.0.

11. The composition according to claim 1 , wherein constitutional units represented by Formula (2)-1 are not substantially adjacent to each other; constitutional units represented by Formula (2)-2 are not substantially adjacent to each other; and the constitutional unit represented by Formula (2)-1 and the constitutional unit represented by Formula (2)-2 are not substantially adjacent to each other.

12. The composition according to claim 1 , wherein the phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm is an iridium complex.

13. The composition according to claim 12 , wherein the iridium complex has a fluorine atom or a trifluoromethyl group.

14. The composition according to claim 12 , wherein the iridium complex has an alkyl group.

15. The composition according to claim 1 , wherein a ratio of a weight of the phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm relative to a weight of the polymer compound

Assignees

• Soga Masayuki
• Goto Osamu
• Ohuchi Kazuei
• Akino Nobuhiko
• Sumitomo Chemical Co

Inventors

• Soga Masayuki
• Goto Osamu
• Ohuchi Kazuei
• Akino Nobuhiko

Classifications

• C08K5/3492

  Triazines · CPC title

• C08L65/00

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• C08G2261/143

  Side-chains containing nitrogen · CPC title

• C08G61/10 Primary

  only aromatic carbon atoms, e.g. polyphenylenes · CPC title

• C08G2261/95

  Use in organic luminescent diodes · CPC title