Functional thin-film element, producing method thereof, and article using functional thin-film element

• US 20060046082A1
• Filed: 08/25/2005
• Published: 03/02/2006
• Est. Priority Date: 08/31/2004
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Kumazawa, Kinya, Sayashi, Mamoru
• Granted Patent: US 7,804,238 B2
• Time in Patent Office: Days
• US Class Current: 428/458
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/171 Electron injection layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 71/125 using electrolytic deposition e.g. in-situ electropolymerisation
• CPC Class Codes: H10K 71/30 Doping active layers, e.g. electron transporting layers
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: H10K 85/10 Organic polymers or oligomers
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/114 Poly-phenylenevinylene; Derivatives thereof
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31696 Including polyene monomers [e.g., butadiene, etc.]
• CPC Class Codes: Y10T 428/31699 Ester, halide or nitrile of addition polymer

Abstract

A functional thin-film element comprises: a substrate (2); an anode (3) or cathode (5) formed on the substrate (2); a luminescent layer (4) formed on the anode (3) or cathode (5); a cathode (5) or anode (3) formed on the luminescent layer (4); and a doped layer formed by doping cations (6) into between the luminescent layer (4) and cathode (5). Alternatively, a functional thin-film element comprise: a substrate (13); an anode (14) or cathode (16) formed on the substrate (13); a luminescent layer (15) formed on the anode (14) or cathode (16); a cathode (16) or anode (14) formed on the luminescent layer (15); and a doped layer formed by doping anions (17) into between the luminescent layer (15) and anode (14).

Claims

1. A functional thin-film element comprising:

a substrate;

a first electrode formed on the substrate;

a functional thin film formed on the first electrode;

a second electrode formed on the functional thin film, the second electrode having a different polarity to the first electrode; and

a doped layer formed with an ionic dopant between the functional thin film and one of the first and second electrodes.

2. The functional thin-film element as claimed in claim 1, wherein the first electrode comprises an anode, and the second electrode comprises a cathode.

3. The functional thin-film element as claimed in claim 1, wherein the first electrode comprises a cathode, and the second electrode comprises an anode.

4. The functional thin-film element as claimed in claim 1, wherein said one of the first and second electrodes has a positive polarity, and the ionic dopant comprises an anion.

5. The functional thin-film element as claimed in claim 1, wherein said one of the first and second electrodes has a negative polarity, and the ionic dopant comprises a cation.

6. The functional thin-film element as claimed in claim 1, wherein the ionic dopant comprises one of an anion and a positive ionic complex that comprises one of an alkali metal element ion selected from a group consisting of Li⁺, Na⁺, K⁺, Rb⁺, and Cs⁺, and an alkaline earth metal element ion selected from a group consisting of Be²⁺, Mg²⁺, Ca²⁺, Sr²⁺, and Ba²⁺.

7. The functional thin-film element as claimed in claim 1, wherein the ionic dopant comprises one of a cation and a negative ionic complex that comprises a halogen element ion selected from a group consisting of F—

, Cl—

, Br—

, and I—

.

8. The functional thin-film element as claimed in claim 1, wherein said one of the first and second electrodes comprises electroconductive nanoparticles, and a transparent polymer resin.

9. The functional thin-film element as claimed in claim 1, wherein one of the first electrode, the functional thin film, and the second electrode comprises a π

-conjugated material.

10. The functional thin-film element as claimed in claim 9, wherein the π

-conjugated material comprises a polymer material soluble in water or solvent.

11. The functional thin-film element as claimed in claim 9, wherein the π

-conjugated material comprises a polymer material soluble in water or solvent, the polymer material including at least one material selected from a group consisting of doped polypyrrole, doped polyaniline, doped polythiophene, doped polyacetylene, doped polyisothianaphtene, and derivatives of them.

12. The functional thin-film element as claimed in claim 9, wherein the π

-conjugated material comprises a polymer material soluble in water or solvent, the polymer material including at least one material selected from a group consisting of polyethylene dioxythiophene, polypropylene oxide, and derivatives thereof.

13. The functional thin-film element as claimed in claim 1, wherein the substrate comprisess a polymer resin film having an average light transmittance of 80% or higher within a visible light range.

14. The functional thin-film element as claimed in claim 13, wherein the polymer resin film has an in-plane birefringence of 0.1 or less.

15. The functional thin-film element as claimed in claim 13, wherein the polymer resin includes at least one kind of resin selected from a group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polymethyl methacrylate, polyether sulphone, and derivatives thereof.

21. An article comprising a functional thin-film element according to claim 1.

22. The article as claimed in claim 21, comprising a display or an illuminator comprising the functional thin film element.

23. A photoelectromotive module comprising a functional thin-film element according to claim 1.

24. A semiconductor module comprising a functional thin-film element according to claim 1.

16. A producing method of a functional thin-film element comprising:

providing a substrate;

forming a first electrode on the substrate;

forming a functional thin film on the first electrode;

forming a second electrode on the functional thin film, the second electrode having a different polarity to the first electrode; and

having a doped layer formed with an ionic dopant between the functional thin film and one of the first and second electrodes.

17. The producing method as claimed in claim 16, wherein the forming the first electrode comprises forming an anode made of a polymer material soluble in water or solvent, on the substrate by printing;

the forming the functional thin film comprises forming the functional thin film made of a π

-conjugated polymer, on the anode;

the having the doped layer comprises doping cations into a surface of the functional thin film; and

the forming the second electrode comprises forming a cathode made of a π

-conjugated polymer by printing, on the functional thin film including cations doped thereto.

18. The producing method as claimed in claim 16, wherein

the forming the first electrode comprises forming a cathode made of a polymer material soluble in water or solvent, on the substrate by printing;

the having the doped layer comprises doping cations into a surface of the cathode;

the forming the functional thin film comprises forming the functional thin film made of a π

-conjugated polymer, on the cathode including cations doped thereto; and

the forming the second electrode comprises forming an anode made of a π

-conjugated polymer by printing, on the functional thin film.

19. The producing method as claimed in claim 16, wherein

the forming the first electrode comprises forming an anode made of a polymer material soluble in water or solvent, on the substrate by printing;

the having the doped layer comprises doping anions into a surface of the anode;

the forming the functional thin film comprises forming the functional thin film made of a π

-conjugated polymer, on the anode including anions doped thereto; and

the forming the second electrode comprises forming a cathode made of a π

-conjugated polymer by printing, on the functional thin film.

20. The producing method as claimed in claim 16, wherein

the forming the first electrode comprises forming a cathode made of a polymer material soluble in water or solvent, on the substrate by printing;

the forming the functional thin film comprises forming the functional thin film made of a π

-conjugated polymer, on the cathode;

the having the doped layer comprises doping anions into a surface of the functional thin film; and

the forming the second electrode comprises forming an anode made of a π

-conjugated polymer by printing, on the functional thin film including anions doped thereto.