Highly Stable Quantum Dot-Containing Polymer Films

Patent metadata

Field	Value
Publication number	US-2017233644-A1
Application number	US-201715429845-A
Country	US
Kind code	A1
Filing date	Feb 10, 2017
Priority date	Feb 12, 2016
Publication date	Aug 17, 2017
Grant date	—

Abstract

Highly stable films containing semiconductor nanoparticles (“quantum dots”) are prepared from resins containing a fast-curing inner phase having a high glass transition temperature (T g ) and certain inner phase/outer phase combinations. The resins may comprise an inner phase and outer phase (but may appear to be a single phase due to their homogeneous appearance when viewed using an optical microscope). The method provides a highly scalable and cost-effective procedure for preparing films that are resistant to light, elevated temperatures, moisture, and oxygen.

First claim

What is claimed is:

1 . A film comprising:
a plurality of semiconductor nanoparticles dispersed in an uncured inner phase that comprises isopropyl myristate; and, an outer phase that comprises a bisphenol A epoxy diacrylate oligomer.

2 . The film recited in claim 1 wherein the inner phase additionally comprises fumed silica.

3 . The film recited in claim 1 additionally comprising:
an oxygen-barrier film.

4 . A film comprising:
a plurality of semiconductor nanoparticles dispersed in a cured inner phase that comprises lauryl methacrylate and trimethylolpropane trimethacrylate; and, an outer phase that comprises an acrylate-functionalized silica nanoparticle resin.

5 . The film recited in claim 4 additionally comprising:
an oxygen-barrier film.

6 . A film comprising:
a plurality of semiconductor nanoparticles dispersed in a cured inner phase that comprises lauryl methacrylate and trimethylolpropane trimethacrylate; and, an outer phase that comprises a monofunctional adhesion-promoting acrylic oligomer and a tricyclodecane dimethanol diacrylate.

7 . The film recited in claim 6 wherein the outer phase comprises substantially equal amounts of the monofunctional adhesion-promoting acrylic oligomer and the tricyclodecane dimethanol diacrylate.

8 . The film recited in claim 6 additionally comprising:
an oxygen-barrier film.

9 . The film recited in claim 6 wherein the semiconductor nanoparticles comprise red-emitting quantum dots.

10 . The film recited in claim 6 wherein the semiconductor nanoparticles comprise red-emitting quantum dots and green-emitting quantum dots.

11 . A two-phase resin system comprising:
an outer phase; and an inner phase that comprises an acrylate having a plurality of semiconductor nanoparticles dispersed therein.

12 . A film comprising:
a first layer comprising an oxygen barrier; a second layer, disposed on the first layer, said second layer comprising a two-phase resin system comprising
an outer phase; and
an inner phase that comprises an acrylate having a plurality of semiconductor nanoparticles dispersed therein.

13 . A film comprising:
a plurality of semiconductor nanoparticles dispersed in an inner phase that comprises isobornyl acrylate and, optionally, a stabilizing additive; and, an outer phase that comprises a resin that provides a phase separation from the inner phase.

14 . The film recited in claim 13 wherein the outer phase comprises an acrylate-functionalized silica nanoparticle resin.

15 . The film recited in claim 13 wherein the outer phase comprises a bisphenol A epoxy diacrylate oligomer and 2-hydroxyethyl acrylate.

16 . The film recited in claim 15 wherein the outer phase comprises about 80% bisphenol A epoxy diacrylate oligomer and about 20% 2-hydroxyethyl acrylate.

17 . The film recited in claim 13 wherein the inner phase additionally comprises lauryl acrylate.

18 . The film recited in claim 13 wherein the outer phase comprises an acrylate-functionalized silica nanoparticle resin and the inner phase consists essentially of isobornyl acrylate and semiconductor nanoparticles.

19 . The film recited in claim 18 further comprising about 1% by weight of a photo-initiator.

20 . The film recited in claim 19 wherein the photo-initiator is bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide.

Assignees

• Nanoco Technologies Ltd

Inventors

• Pillay Narrainen Amilcar
• Vo Cong-Duan
• Naasani Imad
• Ali Abu Mohammad Imroz

Classifications

• H05B33/20

  characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• C09K11/08

  containing inorganic luminescent materials · CPC title

• C09K11/025 Primary

  non-luminescent particle coatings or suspension media · CPC title