Semiconductor Nanoparticle-Based Light-Emitting Devices and Associated Materials and Methods

Patent metadata

Field	Value
Publication number	US-2016359093-A1
Application number	US-201615241328-A
Country	US
Kind code	A1
Filing date	Aug 19, 2016
Priority date	Nov 19, 2008
Publication date	Dec 8, 2016
Grant date	—

Abstract

Embodiments of the present invention relate to a formulation for use in the fabrication of a light-emitting device, the formulation including a population of semiconductor nanoparticles incorporated into a plurality of discrete microbeads comprising an optically transparent medium, the nanoparticle-containing medium being embedded in a host light-emitting diode encapsulation medium. A method of preparing such a formulation is described. There is further provided a light-emitting device including a primary light source in optical communication with such a formulation and a method of fabricating the same.

First claim

What is claimed is:

1 . A light-emitting device comprising:
a primary light source in optical communication with a formulation, wherein the formulation includes a population of semiconductor nanoparticles incorporated into a plurality of discrete microbeads comprising an optically transparent medium, said plurality of discrete microbeads being embedded in a host encapsulation medium.

2 . A light-emitting device according to claim 1 , wherein the primary light source is selected from the group consisting of a light-emitting diode, a laser, an arc lamp, and a blackbody light source.

3 . A light emitting device according to claim 1 , wherein the optically transparent medium is any one of a resin, a polymer, a monolith, a glass, a sol gel, an epoxy, a silicone, and a (meth)acrylate.

4 . A light emitting device according to claim 1 , wherein the optically transparent medium is any one of a polystyrene microsphere having divinyl benzene and a thiol co-monomer, one or more silane monomers, and an epoxy polymer.

5 . A light emitting device according to claim 4 , wherein the one or more silane monomers comprise 3-(trimethoxysilyl)propylmethacrylate or tetramethoxysilane.

6 . A light emitting device according to claim 1 , wherein the semiconductor nanoparticles comprise one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, InP, InAs, InSb, AlP, AlS, AlAs, AlSb, GaN, GaP, GaAs, GaSb, PbS, PbSe, Si, Ge, MgS, MgSe, and MgTe.

7 . A light emitting device according to claim 1 , wherein the host encapsulation medium comprises one or more of a silica glass, a silica gel, a siloxane, a sol gel, a hydrogel, an agarose, a cellulose, an epoxy, a polyether, a polyethylene, a polyvinyl, a poly-diacetylene, a polyphenylene-vinylene, a polystyrene, a polypyrrole, a polyimide, a polyimidazole, a polysulfone, a polythiophene, a polyphosphate, a poly(meth)acrylate, a polyacrylamide, a polypeptide, and a polysaccharide.

8 . A method of fabricating a light-emitting device comprising:
providing a population of semiconductor nanoparticles in a plurality of discrete microbeads comprising an optically transparent medium; embedding said plurality of discrete microbeads in a host light-emitting diode encapsulation material to produce a nanoparticle-containing formulation; and depositing said formulation onto a primary light source such that said primary light source is in optical communication with said population of semiconductor nanoparticles.

9 . A method according to claim 8 , wherein said encapsulation medium is cured after being deposited onto said primary light source.

10 . A method according to claim 8 , wherein the primary light source is selected from the group consisting of a light-emitting diode, a laser, an arc lamp, and a blackbody light source.

11 . A method according to claim 8 , wherein the optically transparent medium is any one of a resin, a polymer, a monolith, a glass, a sol gel, an epoxy, a silicone, and a (meth)acrylate.

12 . A method according to claim 8 , wherein the optically transparent medium is any one of a polystyrene microsphere having divinyl benzene and a thiol co-monomer, one or more silane monomers, and an epoxy polymer.

13 . A method according to claim 12 , wherein the one or more silane monomers comprise 3-(trimethoxysilyl)propylmethacrylate or tetramethoxysilane.

14 . A method according to claim 8 , wherein the semiconductor nanoparticles comprise one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, InP, InAs, InSb, AlP, AlS, AlAs, AlSb, GaN, GaP, GaAs, GaSb, PbS, PbSe, Si, Ge, MgS, MgSe, and MgTe.

15 . A method according to claim 8 , wherein the host encapsulation medium comprises one or more of a silica glass, a silica gel, a siloxane, a sol gel, a hydrogel, an agarose, a cellulose, an epoxy, a polyether, a polyethylene, a polyvinyl, a poly-diacetylene, a polyphenylene-vinylene, a polystyrene, a polypyrrole, a polyimide, a polyimidazole, a polysulfone, a polythiophene, a polyphosphate, a poly(meth)acrylate, a polyacrylamide, a polypeptide, and a polysaccharide.

16 . A light-emitting device comprising:
a primary light source; a population of semiconductor nanoparticles incorporated into a plurality of discrete microbeads comprising an optically transparent medium; and an encapsulation medium, wherein the primary light source is submerged in the encapsulation medium and the plurality of discrete microbeads are embedded within the encapsulation medium.

17 . A light-emitting device according to claim 16 , wherein the encapsulation medium comprises one or more of a silica glass, a silica gel, a siloxane, a sol gel, a hydrogel, an agarose, a cellulose, an epoxy, a polyether, a polyethylene, a polyvinyl, a poly-diacetylene, a polyphenylene-vinylene, a polystyrene, a polypyrrole, a polyimide, a polyimidazole, a polysulfone, a polythiophene, a polyphosphate, a poly(meth)acrylate, a polyacrylamide, a polypeptide, and a polysaccharide.

18 . A light-emitting device according to claim 16 , wherein the primary light source is selected from the group consisting of a light-emitting diode, a laser, an arc lamp, and a blackbody light source.

19 . A light emitting device according to claim 16 , wherein the optically transparent medium is any one of a polystyrene microsphere having divinyl benzene and a thiol co-monomer, one or more silane monomers, and an epoxy polymer.

20 . A light emitting device according to claim 19 , wherein the one or more silane monomers comprise 3-(trimethoxysilyl)propylmethacrylate or tetramethoxysilane.

Assignees

• Nanoco Technologies Ltd

Inventors

• Pickett Nigel
• Harris James

Classifications

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• H10H20/852

  Encapsulations · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title

• G01N33/53

  Immunoassay; Biospecific binding assay; Materials therefor · CPC title

• C09K11/00

  Luminescent materials, e.g. electroluminescent or chemiluminescent · CPC title