Electronic device and method for producing same

Patent metadata

Field	Value
Publication number	US-10584282-B2
Application number	US-201515539524-A
Country	US
Kind code	B2
Filing date	Dec 24, 2015
Priority date	Dec 24, 2014
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

The present invention relates to a fluorescent quantum dot-containing electronic device including a protective sheet. The protective sheet includes a multilayer structure (W) including a base (X) and a layer (Y) stacked on the base (X), the layer (Y) contains a reaction product (D) of an aluminum-containing compound (A) and a phosphorus compound (B), and the reaction product (D) has an average particle diameter of 5 to 50 nm.

First claim

The invention claimed is:

1. A fluorescent quantum dot-containing electronic device, comprising a protective sheet, wherein:
the protective sheet comprises a multilayer structure (W) comprising a base (X) and a layer (Y) stacked on the base (X);
the layer (Y) comprises a reaction product (D) of an aluminum-containing compound (A) and a phosphorus compound (B); and
the reaction product (D) has an average particle diameter of 5 to 50 nm.

2. The electronic device according to claim 1 , comprising a layer containing fluorescent quantum dots, wherein the protective sheet is disposed on one side or both sides of the layer.

3. The electronic device according to claim 1 , wherein the phosphorus compound (B) is an inorganic phosphorus compound (BI).

4. The electronic device according to claim 1 , wherein the aluminum-containing compound (A) is an aluminum-containing metal oxide (Aa).

5. The electronic device according to claim 1 , wherein the average particle diameter of the reaction product (D) is 20 to 40 nm.

6. The electronic device according to claim 1 , wherein a moisture permeability at 40° C. and 90% RH is 1.0 g/(m 2 ·day) or less.

7. The electronic device according to claim 1 , wherein the base (X) comprises a thermoplastic resin film.

8. The electronic device according to claim 1 , wherein the layer (Y) comprises a polymer (F) having at least one functional group selected from the group consisting of a carbonyl group, a hydroxy group, a carboxyl group, a carboxylic anhydride group, and a salt of a carboxyl group.

9. The electronic device according to claim 1 , wherein the multilayer structure (W) further comprises a layer (Z) disposed contiguous to the layer (Y), and the layer (Z) contains a polymer (BOa) having a phosphorus atom-containing functional group.

10. The electronic device according to claim 9 , wherein the polymer (BOa) contained in the layer (Z) is poly(vinylphosphonic acid) or poly(2-phosphonooxyethyl methacrylate).

11. A method for producing the fluorescent quantum dot-containing electronic device according to claim 1 , the method comprising:
(I) applying a coating liquid (S) comprising the aluminum-containing compound (A), the phosphorus compound (B), and a solvent onto the base (X) to form a layer (Y) precursor comprising a reaction product (D) precursor; and
(II) heat-treating the layer (Y) precursor at a temperature of 140° C. or higher to form the layer (Y),
wherein:
the layer (Y) precursor formed in the step (I) has a solvent content of 0.4 wt % or less; and
the reaction product (D) precursor has an average particle diameter of less than 5 nm.

12. The production method according to claim 11 , wherein the phosphorus compound (B) is an inorganic phosphorus compound (BI).

13. The production method according to claim 11 , wherein the aluminum-containing compound (A) is an aluminum-containing metal oxide (Aa).

14. The production method according to claim 11 , wherein the step (I) comprises a drying step of removing the solvent from the coating liquid (S) after applying the coating liquid (S) onto the base (X), and a drying temperature in the drying step is lower than 140° C.

15. The production method according to claim 11 , wherein, in an infrared absorption spectrum of the layer (Y) precursor, a ratio A R /A P of a maximum A R of absorbance in a region from 1,080 to 1,130 cm 1 to a maximum A P of absorbance in a region from 850 to 950 cm 1 is 2.0 or less.

Assignees

• Kuraray Co

Inventors

• Ota Masahiko
• Inubushi Yasutaka
• Sasaki Ryoichi
• Morihara Yasushi
• Nakaya Masakazu

Classifications

• C09D171/02

  Polyalkylene oxides · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B32B9/00 Primary

  Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title

• C08F130/02

  containing phosphorus · CPC title

• B82Y20/00

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