Molded nanoparticle phosphor for light emitting applications

Patent metadata

Field	Value
Publication number	US-10066158-B2
Application number	US-201313743414-A
Country	US
Kind code	B2
Filing date	Jan 17, 2013
Priority date	Jan 19, 2012
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A molded nanoparticle phosphor for light emitting applications is fabricated by converting a suspension of nanoparticles in a matrix material precursor into a molded nanoparticle phosphor. The matrix material can be any material in which the nanoparticles are dispersible and which is moldable. The molded nanoparticle phosphor can be formed from the matrix material precursor/nanoparticle suspension using any molding technique, such as polymerization molding, contact molding, extrusion molding, injection molding, for example. Once molded, the molded nanoparticle phosphor can be coated with a gas barrier material, for example, a polymer, metal oxide, metal nitride or a glass. The barrier-coated molded nanoparticle phosphor can be utilized in a light-emitting device, such as an LED. For example, the phosphor can be incorporated into the packaging of a standard solid state LED and used to down-convert a portion of the emission of the solid state LED emitter.

First claim

What is claimed is:

1. A method of fabricating a molded nanoparticle phosphor, the method comprising:
providing, in a mold, a suspension of nanoparticles in a matrix material precursor;
converting the matrix material precursor to a matrix material, wherein the nanoparticles are suspended in the matrix material;
removing the matrix material from the mold; and
coating all surfaces of the matrix material with a gas barrier material.

2. The method of claim 1 , wherein the matrix material is a polymer or a sol gel.

3. The method of claim 1 , wherein the matrix material is an epoxy, silicone, or acrylate.

4. The method of claim 1 , wherein the gas barrier material is a polymer, metal oxide, metal nitride or a glass.

5. The method of claim 1 , wherein the gas barrier material is an epoxy, silicone, or acrylate.

6. The method of claim 1 , wherein the matrix material precursor comprises a monomer formulation.

7. The method of claim 6 , wherein the matrix material precursor further comprises a catalyst, crosslinking agent, or initiator.

8. The method of claim 1 , wherein converting the suspension to a molded nanoparticle phosphor comprises polymerization molding, contact molding, casting, extrusion or injection molding.

9. The method of claim 1 , wherein coating the molded nanoparticle phosphor with a gas barrier material comprises atomic layer deposition, brush coating, evaporative coating, or spray coating.

10. A phosphor composition comprising:
a molded matrix material;
a plurality of nanoparticles suspended within the molded matrix material; and
a gas barrier material coated upon every surface of the molded matrix material.

11. The phosphor composition of claim 10 , wherein the matrix material is a polymer or a sol gel.

12. The phosphor composition of claim 10 , wherein the matrix material is an epoxy, silicone, or acrylate.

13. The phosphor composition of claim 10 , wherein the gas barrier material is a polymer, metal oxide, metal nitride or a glass.

14. The phosphor composition of claim 10 , wherein the gas barrier material is an epoxy, silicone, or acrylate.

Assignees

• Nanoco Technologies Ltd

Inventors

• Naasani Imad
• Pang Hao

Classifications

• H10W90/754

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• C08G2261/95

  Use in organic luminescent diodes · CPC title

• C08G2261/3442

  Polyetherketones · CPC title

• C09D4/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title