Large scale film containing quantum dots or dye, and production method therefor

Patent metadata

Field	Value
Publication number	US-11024778-B2
Application number	US-201615735312-A
Country	US
Kind code	B2
Filing date	Jun 10, 2016
Priority date	Jun 10, 2015
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

The present disclosure relates to a large scale film containing quantum dots or a dye, a method of preparing the large scale film, including: forming quantum dots or a dye dispersed in a solvent in the form of fibers or beads; applying pressure to an adhesive film to make the fibers or the beads adhere thereto; and curing the adhesive film onto which the fibers or the beads have adhered, and fibers or beads of quantum dots or a dye which are prepared by electrospinning.

First claim

We claim:

1. A method of preparing a large scale film, the method comprising:
electrospinning a mixture comprising a polymer matrix and quantum dots or dyes dispersed in a solvent through a nozzle of a electrospinning device onto an intermediate substrate of the electrospinning device and solidifying the mixture such that solidified fibers or beads of the quantum dots or dyes are formed on the intermediate substrate;
spraying the solidified fibers or beads of the quantum dots or dyes on an adhesive film and applying a predetermined pressure onto the solidified fibers or beads of the quantum dots or dyes to make the solidified fibers or beads of the quantum dots or dyes adhere to the adhesive film;
curing the adhesive film onto which the solidified fibers or beads of the quantum dots or dyes have adhered; and
forming at least one inorganic coating layer and at least one organic coating layer on the solidified fibers or beads of the quantum dots or dyes,
wherein the adhesive film comprises a member selected from a group consisting of optically clear adhesive (OCA), optically clear resin (OCR), polyimide, polyethylene terephthalate, polycarbonate, silicone, and combinations thereof.

2. The method of preparing a large scale film of claim 1 , wherein the forming of the at least one inorganic coating layer is performed by an atomic layer deposition (ALD), and the forming of the at least one organic coating layer is performed by a molecular layer deposition (MLD).

3. The method of preparing a large scale film of claim 1 , wherein the solidified fibers or the beads of the quantum dots or dyes include quantum dot fibers, quantum dot fibers having a core-shell structure, quantum dot beads, quantum dot beads having a core-shell structure, dye fibers, or dye beads.

4. The method of preparing a large scale film of claim 3 , wherein a width of the solidified fiber or an average size of the solidified beads is from 50 nm to 20 μm.

5. The method of preparing a large scale film of claim 1 , wherein the solvent includes an organic solvent in which the polymer is dispersed.

6. The method of preparing a large scale film of claim 1 , further comprising gathering the solidified fibers or beads of the quantum dots or dyes from the substrate after the electrospinning.

7. The method of preparing a large scale film of claim 1 , wherein a voltage for the electrospinning is 20 kV and a release rate of the mixture is 1 mL/h.

8. A method for preparing a large scale film, the method comprising:
electrospinning a mixture comprising a polymer matrix and quantum dots or dyes dispersed in a solvent through a nozzle of a electrospinning device onto an intermediate substrate of the electrospinning device and solidifying the mixture such that solidified fibers or beads of the quantum dots or dyes are formed on the substrate;
spraying the solidified fibers or beads of the quantum dots or dyes on an adhesive film and applying a predetermined pressure onto the solidified fibers or beads of the quantum dots or dyes to make the solidified fibers or the beads of the quantum dots or dyes adhere to the adhesive film, the adhesive film comprising optically clear adhesive (OCA) or optically clear resin (OCR); and
forming at least one inorganic coating layer and at least one organic coating layer on the solidified fibers or beads,
wherein the forming of the at least one organic coating layer is performed by a molecular layer deposition (MLD).

9. The method of claim 8 , wherein the solidified fibers or beads of the quantum dots or dyes include quantum dot fibers, quantum dot fibers having a core-shell structure, quantum dot beads, quantum dot beads having a core-shell structure, dye fibers, or dye beads.

10. The method of claim 8 , wherein a width of the solidified fiber or an average size of the solidified beads is from 50 nm to 20 μm.

11. The method of claim 8 ,
wherein the forming of the at least one inorganic coating layer is performed by an atomic layer deposition (ALD).

12. The method of preparing a large scale film of claim 8 , further comprising gathering the solidified fibers or beads of the quantum dots or dyes from the substrate after the electrospinning.

13. The method of preparing a large scale film of claim 1 , wherein a voltage for the electrospinning is 10 kV and a release rate of the mixture is 20 μL/h.

14. A method of preparing a large scale film, the method comprising:
electrospinning a mixture comprising a polymer matrix and quantum dots or dyes dispersed in a solvent through a nozzle of a electrospinning device onto an intermediate substrate of the electrospinning device and solidifying the mixture such that solidified fibers or beads of the quantum dots or dyes are formed on the substrate;
forming an adhesive film;
spraying the solidified fibers or beads of the quantum dots or dyes on the adhesive film and applying a predetermined pressure onto the solidified fibers or beads of the quantum dots or dyes to make the solidified fibers or beads of the quantum dots or dyes adhere to the adhesive film;
removing rest of the solidified fibers or beads which are non-adhered to the adhesive film; and
curing the adhesive film onto which at least a portion of the solidified fibers or beads are adhered.

15. The method of preparing a large scale film of claim 14 , further comprising:
after the forming of the solidified fibers or beads of the quantum dots or dyes, forming at least one inorganic coating layer and at least one organic coating layer on each of the solidified fibers or beads of the quantum dots or dyes,
wherein the forming of the at least one inorganic coating layer is performed by an atomic layer deposition (ALD), and the forming of the at least one organic coating layer is performed by a molecular layer deposition (MLD).

16. The method of preparing a large scale film of claim 14 , wherein the solidified fibers or beads of the quantum dots or dyes include quantum dot fibers, quantum dot fibers having a core-shell structure, quantum dot beads, quantum dot beads having a core-shell structure, dye fibers, or dye beads.

17. The method of preparing a large scale film of claim 16 , wherein a width of the solidified fiber or a size of the solidified bead is from 50 nm to 20 μm.

18. The method of preparing a large scale film of claim 14 , further comprising gathering the solidified fibers or beads of the quantum dots or dyes from the substrate after the electrospinning.

Assignees

• Research & Business Found Sungkyunkwan Univ

Inventors

• Chung Ho Kyoon
• Chae Hee Yeop
• Cho Sung Min
• Jo Deok Su
• Jung Subin
• Kim Bokyoung
• Kim Dae Kyoung
• Lee Seunghwan

Classifications

• H10H20/8514

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

• H10H20/0361

  of wavelength conversion means · CPC title

• H10H20/8512 Primary

  Wavelength conversion materials · CPC title

• G02B6/02

  Optical fibres with cladding {with or without a coating} · CPC title

• B32B2264/10

  Inorganic particles · CPC title