Polymer, electroluminescent device, and light emitting device

• US 7,871,714 B2
• Filed: 12/19/2008
• Issued: 01/18/2011
• Est. Priority Date: 12/25/2002
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Nomura, Ryoji, Seo, Satoshi, Takasu, Takako
• Primary Examiner(s): Yamnitzky; Marie R.
• Application Number:
  US12/339,112
• Publication Number:
  US 20090102374A1
• Time in Patent Office: 760 Days
• Field of Search: None
• US Class Current: 428/690
• CPC Class Codes: C08G 61/124 with a five-membered ring containing one nitrogen atom in the ring
• CPC Class Codes: C08G 61/126 with a five-membered ring containing one sulfur atom in the ring
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/14 Macromolecular compounds
• CPC Class Codes: C09K 2211/1416 Condensed systems
• CPC Class Codes: C09K 2211/1425 Non-condensed systems
• CPC Class Codes: C09K 2211/1458 containing sulfur as the only heteroatom
• CPC Class Codes: C09K 2211/1466 containing nitrogen as the only heteroatom
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/125 using electrolytic deposition e.g. in-situ electropolymerisation
• CPC Class Codes: H10K 85/113 Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
• CPC Class Codes: H10K 85/115 Polyfluorene; Derivatives thereof
• CPC Class Codes: H10K 85/151 Copolymers
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

A novel electroluminescent polymer is represented by the following formula. A film of the polymer represented by the following formula can be formed by electrolytic polymerization, and farther emits light in a different color by an electric field when a substituent thereof is changed. Therefore, a light-emitting device that is capable of multicolor displaying can be easily obtained.

Claims

1. A polymer having the following general formula (I) as a repeating unit,

2. A light-emitting device having a layer including a polymer having a repeating unit represented by the following general formula (I) between a pair of electrodes,

3. The light-emitting device according to claim 2, wherein the layer including the polymer is a layer formed by electrolytic polymerization.

4. A light-emitting device having a plurality of electroluminescent devices,

wherein each of the plurality of electroluminescent devices has an opposed pair of electrodes and a layer including a polymer, which is formed between a pair of electrodes,

wherein the polymer is a compound having a repeating unit represented by the following general formula (I),

5. The light-emitting device according to claim 4, wherein the polymer in at least one of the plurality of electroluminescent devices is different from the polymer of the other electroluminescent devices.

6. A light-emitting device having:

a substrate having an insulating surface;

a plurality of stripe-shaped first electrodes formed at the insulating surface of the substrate;

a plurality of layers including a polymer, which are formed on the plurality of the stripe-shaped first electrodes; and

a plurality of stripe-shaped second electrodes arranged to be orthogonal to the stripe-shaped first electrodes, which are formed on the plurality of layers including the polymer,

wherein the polymer is a compound having a repeating unit represented by the following general formula (I),

7. The light-emitting device according to claim 6, wherein the polymer in at least one of the plurality of layers is different from the polymer of the other layers.

8. The light-emitting device according to claim 6, wherein the layers including the polymer are layers formed by electrolytic polymerization.

9. A light-emitting device having:

a substrate having an insulating surface;

a plurality of first electrodes formed at the insulating surface of the substrate;

a plurality of layers including a polymer, which are formed on each of the plurality of first electrodes; and

a second electrode opposed to each of the plurality of first electrodes with the plurality of layers including the polymer interposed in between,

wherein the polymer is a compound having a repeating unit represented by the following general formula (I),

10. The light-emitting device according to claim 9, wherein the polymer in at least one of the plurality of layers is different from the polymer of the other layers.

12. The light-emitting device according to claim 9, wherein the plurality of layers including the polymer are layers formed by electrolytic polymerization.

13. The light-emitting device according to claim 9, further comprising a plurality of data signal lines, a plurality of scan signal lines, and a plurality of nonlinear elements,

wherein one of the plurality of nonlinear elements is connected to a corresponding one of the plurality of data signal lines and a corresponding one of the plurality of scan signal lines, and

wherein one of the plurality of first electrodes is electrically connected to a corresponding one of the plurality of nonlinear elements.

14. The light-emitting device according to claim 13, wherein a thin film transistor is used as at least one of the nonlinear elements.

11. A light-emitting device having a plurality of first to third pixels that emit light in different colors from each other on a substrate having an insulating surface, having:

a plurality of first electrodes;

a layer including a polymer, which is formed on each of the plurality of first electrodes; and

a second electrode opposed to the plurality of first electrodes, which is formed on the layer including the polymer,

wherein the second electrode is provided in common with the plurality of first to third pixels, and

wherein the polymer is a compound that has a repeating unit represented by the following general formula (I), and the polymer of the layer including the polymer is different from each other in the first to third pixels,