Polymer compound, luminescent material, and light emitting device

Patent metadata

Field	Value
Publication number	US-9315723-B2
Application number	US-6609906-A
Country	US
Kind code	B2
Filing date	Sep 14, 2006
Priority date	Sep 14, 2005
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Z e of the main repeating minimum unit of the polymer falls within the following range: 0<Z e ≦2.00 (1) wherein the electronic conjunction chain coefficient Z e is defined as a slope obtained by linear approximation of function T m =T m (1/n e ) by the least square method wherein n e represents the number of conjugated electrons contained in repeating minimum units; and T m represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Z e is used.

First claim

The invention claimed is:

1. A luminescent composition containing a polymer and at least one type of phosphorescent compound emitting light having a wavelength of from green to blue, characterized in that the major and minimum repeat unit of the polymer is represented by the formula (4) below

where R represents an alkyl group; and R 1 each independently represent an alkyl group or an aryl group.

2. An ink composition characterized by containing the composition according to claim 1 .

3. The ink composition according to claim 2 , having a viscosity of 1 to 100 mPa·s at 25° C.

4. A luminous thin film characterized by containing the composition according to claim 1 .

5. An organic semiconductor thin film characterized by containing the composition according to claim 1 .

6. An opt-electric device characterized by containing the composition according to claim 1 .

7. An opt-electric device characterized by containing a layer containing the composition according to claim 1 between the electrodes consisting of an anode and a cathode.

8. The opt-electric device according to claim 7 , further comprising a charge transport layer or a charge blocking layer between the electrodes consisting of an anode and a cathode.

9. The opt-electric device according to claim 6 , wherein the opt-electric device is a light-emitting device.

10. A planar light source characterized by using the light-emitting device according to claim 9 .

11. A segment display device characterized by using the light-emitting device according to claim 9 .

12. A dot matrix display device characterized by using the light-emitting device according to claim 9 .

13. A liquid crystal display device characterized by using the light-emitting device according to claim 9 as backlight.

14. Illumination characterized by using the light-emitting device according to claim 9 .

Assignees

• Akino Nobuhiko
• Sekine Chizu
• Mikami Satoshi
• Nakatani Tomoya
• Sumitomo Chemical Co

Inventors

• Akino Nobuhiko
• Sekine Chizu
• Mikami Satoshi
• Nakatani Tomoya

Classifications

• C09K2211/1416

  Condensed systems · CPC title

• C09K2211/1425

  Non-condensed systems · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/1458

  containing sulfur as the only heteroatom · CPC title

• C09K2211/145

  containing oxygen as the only heteroatom · CPC title