Method for preparing multilayer of nanocrystals, and organic-inorganic hybrid electroluminescence device comprising multilayer of nanocrystals prepared by the method

Patent metadata

Field	Value
Publication number	US-2017190966-A1
Application number	US-201715463721-A
Country	US
Kind code	A1
Filing date	Mar 20, 2017
Priority date	May 28, 2004
Publication date	Jul 6, 2017
Grant date	—

Abstract

Disclosed herein is a method for preparing a multilayer of nanocrystals. The method comprises the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals.

First claim

What is claimed is:

1 . A photocurable composition comprising nanocrystals and a first photosensitive compound, wherein the first photosensitive compound comprises a photoreactive functional group and at least one selected from the group consisting of alkylene, amide, phenylene, biphenylen, ester-derived, and ether-derived group.

2 . The composition according to claim 1 , wherein a surface of the nanocrystals is coordinated with at least one selected from a second photosensitive compound and a material miscible with the first photosensitive compound, wherein the second photosensitive compound is the same as or different from the first photosensitive compound, and the second photosensitive compound is selectively bonded to a linker including cyanide, SH, amine, a carboxyl group, or a phosphonic acid group.

3 . The composition according to claim 1 , wherein the photoreactive functional group comprises a carbon-carbon double bond or an acrylic group.

4 . The composition according to claim 1 , wherein the first photosensitive compound is a photopolymerizable monomer, a photopolymerizable oligomer, a photopolymerizable polymer, or a mixture thereof, and is selected from the group consisting of a compound having one or more acrylic groups and/or vinyl groups, an ester-based compound, an ether-based compound and a mixture thereof.

5 . The composition according to claim 1 , wherein the first photosensitive compound is selected from the group consisting of a multifunctional acrylate-based compound having two or more acrylic groups and/or vinyl groups, multifunctional polyalkylene oxide, a polysiloxane-based compound having one or more acrylic groups and/or vinyl groups, and a mixture thereof.

6 . The composition according to claim 1 , wherein the first photosensitive compound is selected from the group consisting of allyloxylated cyclohexyl diacrylate, bis(acryloxy ethyl)hydroxyl isocyanurate, bis(acryloxy neopentylglycol) adipate, bisphenol A diacrylate, bisphenyl A dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, 1,3-butyleneglycol diacrylate, 1,3-butyleneglycol dimethacrylate, dicyclopentanyl diacrylate, diethyleneglycol diacrylate, diethyleneglycol dimethacrylate, dipentaerythirol hexaacrylate, dipentaerythirol monohydroxy pentacrylate, ditrimethylolprpane tetraacrylate, ethyleneglycol dimethacrylate, glycerol methacrylate, 1,6-hexanediol diacrylate, neopentyiglycol dimethacrylate, neopentyiglycol hydroxypivalate diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, phosphoric acid dimethacrylate, polyetyleneglycol diacrylate, polypropyleneglycol diacrylate, tetraethyleneglycol diacrylate, tetrabromobisphenol A diacrylate, triethyleneglycol divinylether, triglycerol diacrylate, trimethyloipropane triacrylate, tripropyleneglycol diacrylate, tris(acryloxyethyl)isocyanurate, phosphoric acid triacrylate, phosphoric acid diacrylate, acrylic acid propargyl ester, vinyl terminated potydimethylsiloxane, vinyl terminated diphenylsiloxane-dimethylsiloxane copolymer, vinyl terminated polyphenylmethylsiloxane, vinyl terminated trifluoromethylsiloxane-dimethylsiloxane copolymer, vinyl terminated diethylsiloxane-dimethylsiloxane copolymer, vinylmethylsiloxane, monomethacryloyloxypropyl terminated polydimethyl siloxane, monovinyl terminated polydimethyl siloxane and monoallyl-mono trimethylsiloxy terminated polyethylene oxide.

7 . The composition according to claim 1 , wherein the nanocrystals are at least one selected from the group consisting of metal nanocrystal, Group II-VI compound semiconductor nanocrystal, Group III-V compound semiconductor nanocrystal, Group IV-VI compound semiconductor nanocrystal, and a mixture thereof.

8 . The composition according to claim 1 , wherein the nanocrystals are comprised of two or more selected from the group consisting of metal nanocrystal, Group II-VI compound semiconductor nanocrystal, Group IV-VI compound semiconductor nanocrystal, and Group III-V compound semiconductor nanocrystal, and wherein the nanocrystal is present in a form of a simple mixture of the two or more, a fused crystal in which the two or more are partially present, or an alloy of the two or more.

9 . A nanocrystal-polymer composite film prepared from the composition according to claim 1 .

10 . The nanocrystal-polymer composite film according to claim 9 , wherein the composite film has a predetermined pattern on at least one surface thereof.

11 . The nanocrystal-polymer composite film according to claim 9 , wherein the predetermined pattern includes a recessed and/or protruded shape, and wherein the predetermined pattern has a rectangular shape, a triangular shape, a trapezoidal shape, a cone shape, a prism shape, a pyramid shape or a combination thereof.

12 . A display device comprising the nanocrystal-polymer composite film according to claim 9 .

13 . The display device according to claim 12 , wherein the nanocrystal-polymer composite film is disposed between a light-guide plate and a prism sheet.

14 . A method for manufacturing a nanocrystal-polymer composite film comprising:
(i) preparing a photocurable composition comprising nanocrystals and a first photosensitive compound, wherein the first photosensitive compound comprises a photoreactive functional group and at least one selected from the group consisting of alkylene, amide, phenylene, biphenylen, ester-derived, and ether-derived group; (ii) applying the photocurable composition to a substrate to form a photocurable composition coating layer; and (iii) exposing the photocurable composition coating layer to a light.

15 . The method according to claim 14 , wherein the method further comprising:
treating the photocurable composition coating layer with a mold having a predetermined pattern to form the predetermined pattern on a surface of the photocurable composition coating layer before exposing to a light.

16 . The method according to claim 14 , wherein a surface of the nanocrystals is coordinated with at least one selected from a second photosensitive compound and a material miscible with the first photosensitive compound, wherein the second photosensitive compound is the same as or different from the first photosensitive compound, and the second photosensitive compound is selectively bonded to a linker including cyanide, SH, amine, a carboxyl group, or a phosphonic acid group.

17 . The method according to claim 14 , wherein the photoreactive functional group comprises a carbon-carbon double bond or an acrylic group.

18 . The method according to claim 14 , wherein the first photosensitive compound is a photopolymerizable monomer, a photopolymerizable oligomer, a photopolymerizable polymer or a mixture thereof, and is selected from the group consisting of a compound having one or more acrylic groups and/or vinyl groups, an ester-based compound, an ether-based compound and a mixture thereof.

19 . The method according to claim 14 , wherein the method further comprises:
repeating the application of the photocurable composition to a substrate to form a photocurable composition coating layer and the exposure of the photocurable composition coating layer to a light, two or more times, to form two or more layers of nanocrystal-polymer composite thin films.

20 . The method according to claim 19 , wherein the method further comprises:
laminating the two or more layers of nanocrystal-polymer composite thin films.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jang Eun Joo
• Jun Shin Ae
• Lee Sung Hun
• Park Jong Jin
• Choi Seong Jae
• Ahn Tae Kyung

Classifications

• B82Y20/00

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

• C09K11/7492

  Arsenides; Nitrides; Phosphides · CPC title

• C09K11/661

  Chalcogenides · CPC title

• C09K11/88

  containing selenium, tellurium or unspecified chalcogen elements · CPC title

• C09K11/892

  Chalcogenides · CPC title