Printed electronics

Patent metadata

Field	Value
Publication number	US-9913374-B2
Application number	US-201615295492-A
Country	US
Kind code	B2
Filing date	Oct 17, 2016
Priority date	Feb 5, 2008
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.

First claim

The invention claimed is:

1. A printed electronic device, comprising:
a substrate comprising at least one surface;
an electrically conductive ink applied to a portion of the at least one surface;
wherein the electrically conductive ink comprises functionalized graphene sheets and at least one binder;
wherein the functionalized graphene sheets completely comprise fully exfoliated single sheets of graphene; and
wherein the functionalized graphene sheets comprise an X-ray or electron diffraction pattern that displays little or no signature corresponding to graphite or graphite oxide.

2. The printed electronic device of claim 1 , wherein the electrically conductive ink is a gel.

3. The printed electronic device of claim 1 , wherein the printed electronic device is selected from the group consisting of: a complete device, a sub-element of a device, and an electronic component.

4. The printed electronic device of claim 1 , further comprising a material applied between the substrate and the electrically conductive ink, wherein the material is selected from the group consisting of: a semiconductor, a metal foil, and a dielectric material.

5. The printed electronic device of claim 1 , wherein the single sheets of graphene have a carbon to oxygen ratio of at least about 100:1.

6. The printed electronic device of claim 1 , wherein the electrically conductive ink further comprises a metal-coated material, and wherein the metal-coated material comprises one or more of: a particle, a powder, flakes, a foil, and a needle.

7. The printed electronic device of claim 1 , wherein the electrically conductive ink further comprises a metal-coated material, and wherein the metal-coated material is selected from the group consisting of: glass fibers, glass beads, and a ceramic material.

8. The printed electronic device of claim 1 , wherein the electrically conductive ink comprises a width of about 130 μm.

9. The printed electronic device of claim 1 , wherein the electrically conductive ink comprises a thickness of about 300 nm.

10. A method of forming a printed electronic device, comprising:
applying an electrically conductive ink to a substrate;
wherein the electrically conductive ink is applied as a conductive pathway;
wherein the electrically conductive ink comprises functionalized graphene sheets and at least one binder;
wherein the functionalized graphene sheets completely comprise fully exfoliated single sheets of graphene; and
wherein the functionalized graphene sheets comprise an X-ray or electron diffraction pattern that displays little or no signature corresponding to graphite or graphite oxide.

11. The method of forming a printed electronic device of claim 10 , wherein the step of applying the electrically conductive ink comprising applying the electrically conductive ink as gel.

12. The method of forming a printed electronic device of claim 10 , wherein the printed electronic device is selected from the group consisting of: a complete device, a sub-element of a device, and an electronic component.

13. The method of forming a printed electronic device of claim 10 , further comprising applying a material to the substrate prior to the step of applying the electrically conductive ink, wherein the material is selected from the group consisting of: a semiconductor, a metal foil, and a dielectric material.

14. The method of forming a printed electronic device of claim 10 , wherein the single sheets of graphene comprise a carbon to oxygen ratio of at least about 100:1.

15. The method of forming a printed electronic device of claim 10 , wherein the electrically conductive ink further comprises a metal-coated material, and wherein the metal-coated material comprises one or more of: a particle, a powder, flakes, a foil, and a needle.

16. The method of forming a printed electronic device of claim 10 , wherein the electrically conductive ink further comprises a metal-coated material, and wherein the metal-coated material is selected from the group consisting of: glass fibers, glass beads, and a ceramic material.

17. The method of forming a printed electronic device of claim 10 , wherein the step of applying the electrically conductive ink comprises applying the electrically conductive ink at a width of about 130 μm.

18. The method of forming a printed electronic device of claim 10 , wherein the step of applying the electrically conductive ink comprises applying the electrically conductive ink at a thickness of about 300 nm.

Assignees

• Univ Princeton
• Vorbeck Mat Corporation

Inventors

• Crain John M
• Lettow John S
• Aksay Ilhan A
• Korkut Sibel
• Chiang Katherine S
• Chen Chuan Hua
• Prudhomme Robert K

Classifications

• C09D7/125

  Chemistry & Metallurgy · mapped topic

• Y10S977/847

  Surface modifications, e.g. functionalization, coating · CPC title

• C09D7/1291

  Chemistry & Metallurgy · mapped topic

• H05K3/12

  using {thick film techniques, e.g.} printing techniques to apply the conductive material {or similar techniques for applying conductive paste or ink patterns} · CPC title

• C01P2004/02

  obtained by optical microscopy · CPC title