Scattering particle, ink composition including the same, and display apparatus including quantum dot layer prepared by using the ink composition

Patent metadata

Field	Value
Publication number	US-2024059921-A1
Application number	US-202318306029-A
Country	US
Kind code	A1
Filing date	Apr 24, 2023
Priority date	Aug 12, 2022
Publication date	Feb 22, 2024
Grant date	—

Abstract

A scattering particle includes a core and a shell, wherein the shell includes a first layer including a compound capable of reacting with oxygen and/or moisture, and a second layer including a compound decomposable by light and/or heat.

First claim

What is claimed is:

1 . A scattering particle comprising:
a core, and a shell, wherein the shell comprises: a first layer comprising a first compound capable of reacting with oxygen and/or moisture; and a second layer comprising a second compound decomposable by light and/or heat.

2 . The scattering particle of claim 1 , wherein the first layer is between the core and the second layer.

3 . The scattering particle of claim 1 , wherein the second layer comprises a second-first layer comprising a compound decomposable by light and/or a second-second layer comprising a compound decomposable by heat.

4 . The scattering particle of claim 1 , wherein the first compound comprises a metal, a phenol-based compound, a phosphorus-based compound, a sulfur-based compound, or any combination thereof.

5 . The scattering particle of claim 1 , wherein the first compound comprises an alkali metal, an alkaline earth metal, a Group III metal, ethylenebis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate), 3,9-bis[2-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethoxy]-2,4,8,10-tetraoxaspiro[5.5]undecane, pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 1,3,5,-trimethyl-2,4,6,-tris(3′5′-di-t-butyl-4-hydroxybenzyl)benzene, triethyleneglycol-bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate], 4,4′-thiobis(6-t-butyl-3-methylphenol), tris-(3,5-di-t-butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-isocyanurate, 1,6-hexanediol-bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2-thio-diethylenebis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], N,N′-hexamethylenebis(3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, 2,4-bis[(octylthio)methyl]-O-cresol, 1,6-hexanediol-bis-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], octadecyl-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2′-methylenebis(4-methyl-6-t-butylphenol), 4,4′-butylidene-bis(3-methyl-6-t-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane, 1,3,5-tris(4-hydroxybenzyl)benzene, tetrakis[methylene-3-(3,5′-di-t-butyl-4′-hydroxyphenylpropionate)]methane, sodium hydrogen sulfite, sodium sulfite, 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl-bis[3-(dodecylthio)propionate], 2-mercaptobenzimidazole, dilauryl-3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropionate, distearyl-3,3′-thiodipropionate, pentaerythrityl-tetrakis(3-laurylthiopropionate), 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, diisodecyl pentaerythritol diphosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, 2,2′-methylenebis(4,6-di-t-butyl-1-phenyloxy)(2-ethylhexyloxy)phosphorus, 6-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3, 2]dioxaphospepine, triphenyl phosphite, diphenyl isodecyl phosphite, phenyl diisodecyl phosphite, 4,4′-butylidene-bis(3-methyl-6-t-butylphenylditridecyl)phosphite, octadecyl phosphite, tris(nonylphenyl)phosphite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 10-(3,5-di-t-butyl-4-hydroxybenzyI)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 10-decyloxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, tris(2,4-di-t-butylphenyl)phosphite, cyclic neopentanetetraylbis(2,4-di-t-butylphenyl)phosphite, cyclic neopentanetetraylbis(2,6-di-t-butylphenyl)phosphite, 2,2-methylenebis(4,6-di-t-butylphenyl)octylphosphite, tris(2,4-di-t-butylphenyl)phosphite, tetrakis(2,4-di-t-butylphenyl)[1,1-biphenyl]-4,4′diylbisphosphonite, bis[2,4-bis(1,1-dimethylethyl)-6-methylphenyl]ethyl ester, phosphonic acid, or any combination thereof.

6 . The scattering particle of claim 1 , wherein the second compound is decomposable by light having a wavelength of 500 nm or less and/or by heat at a temperature of 80° C. or higher.

7 . The scattering particle of claim 1 , wherein the second compound comprises a phosphine-based ligand, an amine-based ligand, a thiol-based ligand, a polyolefin-based compound, a compound comprising a photosensitive functional group, or any combination thereof.

8 . The scattering particle of claim 1 , wherein the core comprises Al 2 O 3 , SiO 2 , ZnO, ZrO 2 , BaTiO 3 , TiO 2 , Ta 2 O 5 , Ti 3 O 5 , ZnO—Al, Nb 2 O 3 , SnO, MgO, or any combination thereof.

9 . An ink composition comprising:
a quantum dot, the scattering particle of claim 1 , and a monomer.

10 . The ink composition of claim 9 , wherein the quantum dot comprises a core-shell structure comprising:
a core comprising a semiconductor compound; and a shell comprising an oxide of metal, an oxide of metalloid, an oxide of non-metal, a semiconductor compound, or any combination thereof.

11 . The ink composition of claim 10 , wherein the semiconductor compound comprised in the core comprises a Group I-III-VI semiconductor compound.

12 . The ink composition of claim 11 , wherein the Group I-III-VI semiconductor compound comprises AgInS, AgInS 2 , CuInS, CuInS 2 , CuGaO 2 , AgGaO 2 , AgAlO 2 , AgInGaS, or any combination thereof.

13 . The ink composition of claim 10 , wherein the semiconductor compound comprised in the shell comprises CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

14 . The ink composition of claim 9 , wherein
the quantum dot is about 1 wt % to about 70 wt % in amount, based on total 100 wt % of the ink composition, and the scattering particle is about 0.1 wt % to about 10 wt % in amount, based on total 100 wt % of the ink composition.

15 . A display apparatus comprising:
a first substrate, a light-emitting device on the first substrate; and a light controller on the first substrate and corresponding to the light-emitting device, wherein the light controller comprises a quantum dot layer and a color filter layer, and the quantum dot layer is prepared by utilizing the ink composition of claim 9 .

16 . The display apparatus of claim 15 , wherein the light-emitting device comprises:
a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and comprising an emission layer.

17 . The display apparatus of claim 16 , wherein the interlayer further comprises:
a hole transport region comprising a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or any combination thereof; and/or an electron transport region comprising a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

18 . The display apparatus of claim 15 , wherein
the scattering particle comprises a core and a shell, and the shell comprises a compound obtained by oxidizing the first.

19 . The display apparatus of claim 18 , wherein the compound obtained by oxidizing the first compound is a metal oxide.

20 . The display apparatus of claim 15 , further comprising an inorganic capping layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Soodong
• Kim Sujin

Classifications

• C09D11/38 Primary

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C09D11/50 Primary

  Sympathetic, colour changing or similar inks · CPC title

• C09C1/3661

  Coating · CPC title