Methods for fabricating quantum dot polymer films

Patent metadata

Field	Value
Publication number	US-9966508-B2
Application number	US-201514638578-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Mar 4, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The addition of a chain transfer agent (CTA) or a reversible-addition fragmentation chain transfer agent (RAFT CTA) such as (2-(dodecyl-thiocarbonothioylthio)-2-methylpropionic acid) during the formation of quantum dot polymer films yields films characterized by high and stable quantum yields.

First claim

What is claimed is:

1. A method for fabricating quantum dot (QD) polymer films comprising:
combining a quantum dot suspension with at least one chain transfer agent (CTA) to form a QD-CTA mixture;
adding a methyl(acrylate) monomer, a photoinitiator, and a crosslinker to the QD-CTA mixture to form a QD-CTA-resin mixture;
depositing the QD-CTA-resin mixture on a substrate; and
curing the QD-CTA-resin mixture with UV light to form a film.

2. The method recited in claim 1 wherein the quantum dot suspension comprises toluene.

3. The method recited in claim 1 wherein the quantum dot suspension comprises an aliphatic hydrocarbon-based solvent.

4. The method recited in claim 1 wherein the chain transfer agent (CTA) is a trithiocarbonate.

5. The method recited in claim 1 wherein the chain transfer agent (CTA) is a reversible-addition fragmentation chain transfer agent (RAFT CTA).

6. The method recited in claim 5 wherein the RAFT CTA is 2-(dodecylthiocarbonothioylthio)-2-methylpropionic acid.

7. The method recited in claim 5 wherein the RAFT CTA is a thiocarbonylthio compound.

8. The method recited in claim 7 wherein the thiocarbonylthio compound is a dithiobenzoate.

9. The method recited in claim 7 wherein the thiocarbonylthio compound is a dithioester.

10. The method recited in claim 7 wherein the thiocarbonylthio compound is a dithiocarbamate.

11. The method recited in claim 7 wherein the thiocarbonylthio compound is a trithiocarbonate.

12. The method recited in claim 7 wherein the thiocarbonylthio compound is a xanthate.

13. The method recited in claim 5 wherein the RAFT CTA includes one or more carboxyl-terminated trithiocarbonates.

14. The method of claim 1 , wherein the crosslinker is trimethyloylpropane trimethacrylate (TMPTM).

Assignees

• Nanoco Technologies Ltd

Inventors

• Vo Cong-Duan
• Naasani Imad

Classifications

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C09K11/883

  with zinc or cadmium · CPC title

• Y10S977/774

  Exhibiting three-dimensional carrier confinement, e.g. quantum dots · CPC title

• Y10S977/897

  Polymerization · CPC title