KR20210113943A - A quantum dot, a quantum dot dispersion, a quantum dot light-emitting diode, a quantum dot film, and a light converting curable composition comprising the quantum dot, a cured film manufactured by the composition and a display device comprising the same - Google Patents

Abstract

The present invention provides a quantum dot having a ligand layer on a surface thereof, which provides the quantum dot including the ligand layer having a compound of a specific chemical formula, a quantum dot dispersion including the same, and a light conversion curable composition. In addition, the quantum dot according to the present invention has excellent optical properties and adhesion, and thus can be effectively applied in various applications such as a quantum dot film, a quantum dot light emitting diode, a cured film such as a color filter or a light conversion laminated substrate, and an image display device including the cured film.

Description

Quantum dots, quantum dot dispersion, quantum dot light emitting diode including the same, quantum dot film, light conversion curable composition, a cured film formed using the composition, and an image display device including the cured film {A QUANTUM DOT, A QUANTUM DOT DISPERSION, A QUANTUM DOT LIGHT-EMITTING DIODE, A QUANTUM DOT FILM, AND A LIGHT CONVERTING CURABLE COMPOSITION COMPRISING THE QUANTUM DOT, A CURED FILM MANUFACTURED BY THE COMPOSITION AND A DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a quantum dot, a quantum dot dispersion, a quantum dot light emitting diode comprising the same, a quantum dot film, a light conversion curable composition, a cured film formed using the light conversion curable composition, and an image display device including the cured film.

Quantum dots have high luminescence and narrow emission spectrum, can control emission wavelength with one excitation wavelength, and have unique characteristics of stable quantum dots against light. A lot of research has been done to use it in such an important application field.

These quantum dots are very sensitive to the state of the surface, and oxidation occurs from the surface depending on the dispersed solvent or the surrounding environment, resulting in a sharp decrease in luminous efficiency. For various applications of quantum dots, they must be dispersed in various solvents other than the organic solvent in which they were initially dispersed, or specific functional groups must be formed on the surface. There is this.

Many attempts have been made to overcome these problems, and various methods are currently being proposed. One of them is a ligand exchange method in which organic materials present on the surface of quantum dots are replaced with molecules having a desired functional group. Although this method is a method of substituting an organic molecule suitable for application of organic molecules present on the surface of the quantum dot, it has a disadvantage in causing a fatal problem in luminous efficiency because it directly affects the surface of the quantum dot.

Republic of Korea Patent No. 10-1628065 discloses an invention related to a quantum dot composite including an amino siloxane ligand and an optical sheet including the same, but the compatibility is low, the dispersibility is poor, the stability and reliability are lowered, the optical properties, The problem that the coating film hardness, adhesiveness, and the like is lowered has not been solved.

Republic of Korea Patent No. 10-1628065

One object of the present invention is to provide a quantum dot excellent in optical properties and adhesion.

Another object of the present invention is to provide a light conversion curable composition excellent in light conversion efficiency, viscosity stability and adhesion.

In addition, an object of the present invention is to provide a quantum dot film, a quantum dot dispersion, a light conversion curable composition, and a quantum dot light emitting diode (QLED) containing the quantum dots.

Another object of the present invention is to provide a cured film formed using the composition and an image display device including the cured film.

The present invention provides a quantum dot having a ligand layer on its surface, wherein the ligand layer includes a compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and a combination thereof do:

[Formula 1]

In Formula 1, A ₁ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group; L ₁ is a linear or branched alkylene group having 1 to 30 carbon atoms; L ₂ is a direct bond, an ester, an ether, or an amide; R ₁ to R ₄ are each independently hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms (provided that at least one of _{R 1} to R _{4 is not hydrogen);} X ₁ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms; n is an integer from 1 to 100;

[Formula 2]

In Formula 2, A ₂ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group; L ₃ is a linear or branched alkylene group having 1 to 30 carbon atoms; L ₄ is a direct bond, ester, ether, or amide; R ₅ to R ₁₀ are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms; X ₂ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms; m is an integer from 1 to 100.

In addition, the present invention provides a quantum dot light emitting diode, a quantum dot film, and a quantum dot dispersion comprising the quantum dots.

In addition, the present invention provides a light conversion curable composition comprising the quantum dots, scattering particles, a photopolymerizable monomer and a photopolymerization initiator.

In addition, the present invention provides a cured film formed by using the light conversion curable composition.

In addition, the present invention provides an image display device including the cured film.

The quantum dot according to the present invention includes a compound represented by a specific chemical structure as a ligand layer, so that the surface of the quantum dot is protected, so that optical properties and adhesion can be improved. Accordingly, quantum dot film, quantum dot light emitting diode, color filter, light It can be effectively applied to various uses such as conversion laminated substrates.

Hereinafter, the present invention will be described in detail.

The present invention is a quantum dot having a ligand layer on the surface, wherein the ligand layer is a quantum dot comprising a compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and combinations thereof to provide.

[Formula 1]

In Formula 1,

A ₁ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group,

L ₁ is a linear or branched alkylene group having 1 to 30 carbon atoms,

L ₂ is a direct bond, ester, ether, or amide;

R ₁ to R ₄ are each independently hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms (provided _{that at least one of R 1} to R ₄ is a straight chain or branched chain alkyl group having 1 to 10 carbon atoms),

X ₁ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms,

n is an integer from 1 to 100;

[Formula 2]

In Formula 2,

A ₂ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group,

L ₃ is a straight-chain or branched alkylene group having 1 to 30 carbon atoms,

L ₄ is a direct bond, ester, ether, or amide;

R ₅ to R ₁₀ are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms,

X ₂ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms,

m is an integer from 1 to 100.

In addition, the present invention provides a quantum dot light emitting diode (Quantum Dot Light-Emitting Diode, QLED), a quantum dot film, or a quantum dot dispersion comprising the quantum dots.

In addition, the present invention provides a light conversion curable composition comprising the quantum dots, scattering particles, a photopolymerizable monomer and a photopolymerization initiator.

In addition, the present invention is a cured film formed using the light conversion curable composition; And it provides an image display device including the cured film.

As used herein, the alkyl group (alkyl group) may mean a monovalent aliphatic saturated hydrocarbon, linear alkyl groups such as methyl, ethyl, propyl and butyl; It may include all branched alkyl groups such as iso-propyl, sec-butyl, tert-butyl, and neopentyl.

As used herein, the alkylene group (alkylene group) refers to a straight-chain or branched divalent hydrocarbon composed of 1 to 30 carbon atoms, and includes, for example, methylene, ethylene, n-propylene, i-propylene, and the like. It is not limited.

As used herein, the cycloalkyl group may include both a cyclic saturated hydrocarbon, or a cyclic unsaturated hydrocarbon including one or two or more unsaturated bonds.

As used herein, the alkenyl group (alkenyl group) may mean an alkyl group including one or two or more double bonds.

As used herein, the alkynyl group may refer to an alkyl group including one or two or more triple bonds.

< Quantum dots >

In the present invention, quantum dots are self-luminous by a light source and may be used to generate light in the visible and infrared regions. A quantum dot is a material with a crystal structure of several nanometers, and may be composed of hundreds to thousands of atoms. Atoms form molecules, and molecules form an aggregate of small molecules called clusters to form nanoparticles. Usually, when these nanoparticles have semiconductor characteristics, they are called quantum dots. The quantum dot of the present invention is not particularly limited as long as it conforms to this concept. When an object becomes smaller than nano size, the quantum confinement effect, which is a phenomenon in which the energy band gap of the object becomes larger, occurs. It emits energy corresponding to the gap and can emit light.

The quantum dot according to the present invention has a ligand layer on the surface, and the ligand layer comprises a compound represented by the following formula (1), a compound represented by the following formula (2), and a compound selected from the group consisting of combinations thereof do it with Accordingly, the quantum dot surface is protected, oxidation stability is improved, a decrease in quantum efficiency is prevented, reliability can be improved, and optical properties and adhesion can be improved.

The compound represented by Formula 1 included in the ligand layer of the quantum dot is as follows:

[Formula 1]

In Formula 1, A ₁ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group, L ₁ is a linear or branched alkylene group having 1 to 30 carbon atoms, L ₂ is a direct bond, ester, ether, or amide; and R ₁ to R ₄ are each independently hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms (provided _{that at least one of R 1} to R ₄ is a straight chain or branched chain alkyl group having 1 to 10 carbon atoms) , X ₁ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms, n is 1 to 100 is an integer In addition, the photopolymerization reactive group may be an alkenyl group, an alkynyl group, or an acrylate group.

Preferably, A ₁ is a thiol group, a carboxyl group, a phosphoric acid group, or an amine group, L ₁ is a straight-chain or branched alkylene group having 1 to 5 carbon atoms, L ₂ is a direct bond, an ester, an ether, or an amide, R ₁ to R ₄ are each independently hydrogen or a linear or branched chain alkyl group having 1 to 10 carbon atoms (provided _{that at least one of R 1} to R ₄ is a linear or branched chain alkyl group having 1 to 10 carbon atoms), X ₁ is a linear or branched alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 1 to 10 carbon atoms, an aromatic hydrocarbon group having 6 to 12 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, or 2 to 10 carbon atoms. is an acrylate group, and n is an integer from 1 to 10.

In one embodiment of the present invention, the compound represented by Formula 1 may be a compound represented by any one of Formulas 1-1 to 1-9 below.

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

[Formula 1-5]

[Formula 1-6]

[Formula 1-7]

[Formula 1-8]

[Formula 1-9]

The compound represented by Formula 2 included in the ligand layer of the quantum dot is as follows:

[Formula 2]

In Formula 2, A ₂ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group, L ₃ is a linear or branched alkylene group having 1 to 30 carbon atoms, and L ₄ is a direct bond, an ester, an ether, or an amide , R ₅ to R ₁₀ are each independently hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms, X ₂ is a straight or branched chain alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, and a cycloalkyl group having 1 to 30 carbon atoms. It is a 6-30 aromatic hydrocarbon group, or a C2-C30 photopolymerization reactive group, and m is an integer of 1-100. In addition, the photopolymerization reactive group may be an alkenyl group, an alkynyl group, or an acrylate group.

Preferably, A ₂ is a thiol group, a carboxyl group, a phosphoric acid group, or an amine group, L ₃ is a linear or branched alkylene group having 1 to 5 carbon atoms, L ₄ is a direct bond, an ester or an ether, and R ₅ to R ₁₀ is each independently hydrogen or a linear or branched chain alkyl group having 1 to 5 carbon atoms, and X ₂ is a straight or branched chain alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 1 to 10 carbon atoms, an aromatic group having 6 to 12 carbon atoms. a hydrocarbon group, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, or an acrylate group having 2 to 10 carbon atoms, and m is an integer of 1 to 10.

In one embodiment of the present invention, the compound represented by Formula 2 may be a compound represented by any one of Formulas 2-1 to 2-8 below.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 2-6]

[Formula 2-7]

[Formula 2-8]

The compound represented by Formula 1 or 2 of the present invention may serve to stabilize the quantum dot by being coordinated to the surface of the quantum dot as an organic ligand.

Generally, the prepared quantum dots generally have a ligand layer on the surface, and immediately after the preparation, the ligand layer is oleic acid, lauric acid, 2-(2-methoxyethoxy)acetic acid, 2 -[2-(2-methoxyethoxy)ethoxy]acetic acid, and succinic acid mono-[2-(2-methoxy-ethoxy)-ethyl]ester, and the like. In this case, compared with the quantum dots of the present invention comprising the compound represented by Formula 1 or 2 as a ligand layer, the surface protection effect is reduced due to non-binding defects on the surface of the quantum dots due to the weaker bonding force between the ligand layer and the quantum dots. can be In addition, oleic acid is well dispersed in unsaturated hydrocarbon solvents such as n-hexane, a highly volatile organic compound (VOC), and aromatic solvents such as chloroform and benzene, but has poor dispersibility in solvents such as PGMEA. .

The quantum dot according to the present invention includes the compound represented by Chemical Formula 1 or 2 in the ligand layer, so that the surface of the quantum dot is protected, so it can exhibit excellent oxidation stability compared to the conventional quantum dot, as well as in a solvent or light such as PGMEA. It has very good dispersibility in the synthetic monomer, which has the effect of improving optical properties.

In one embodiment, the quantum dot according to the present invention includes the compound represented by Formula 1 in the ligand layer, oleic acid, lauric acid, 2-(2-methoxyethoxy) ) acetic acid, 2-[2-(2-methoxyethoxy)ethoxy]acetic acid, and succinic acid mono-[2-(2-methoxy-ethoxy)-ethyl]ester, and the like.

The quantum dot is not particularly limited as long as it is a quantum dot particle capable of emitting light by stimulation by light or electricity. For example, a group II-VI semiconductor compound; III-V semiconductor compounds; group IV-VI semiconductor compounds; Group IV element or a compound containing the same; And may be selected from the group consisting of a combination thereof, these may be used alone or in mixture of two or more.

For example, the II-VI semiconductor compound may include a binary compound selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, and mixtures thereof; a triatomic compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe and mixtures thereof; and CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof.

The group III-V semiconductor compound may include a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof; a ternary compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, and mixtures thereof; and GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. The present invention is not limited thereto.

The group IV-VI semiconductor compound may include a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; And SnPbSSe, SnPbSeTe, SnPbSTe, and may be at least one selected from the group consisting of a quaternary compound selected from the group consisting of mixtures thereof, but is also not limited thereto.

The group IV element or a compound containing the same is an element selected from the group consisting of Si, Ge, and mixtures thereof; and SiC, SiGe, and a bi-element compound selected from the group consisting of mixtures thereof, but is not limited thereto.

Quantum dots have a homogeneous single structure; dual structures such as core-shell structures and gradient structures; Or they may have a mixed structure, and in the present invention, the type of quantum dots is not particularly limited as long as they can emit light by stimulation by light.

According to an embodiment, the quantum dot has a core-shell structure, and the core includes InP, InZnP, InGaP, CdSe, CdS, CdTe, ZnS, ZnSe, ZnTe, CdSeTe, CdZnS, CdSeS, PbSe, PbS, PbTe, AgInZnS, At least one selected from the group consisting of HgS, HgSe, HgTe, GaN, GaP, GaAs, InGaN, InAs and ZnO, wherein the shell is ZnS, ZnSe, ZnTe, ZnO, CdS, CdSe, CdTe, CdO, InP , InS, GaP, GaN, GaO, InZnP, InGaP, InGaN, InZnSCdSe, PbS, TiO, may include at least one selected from the group consisting of SrSe and HgSe, preferably, InP / ZnS, InP / ZnSe , InP/GaP/ZnS, InP/ZnSe/ZnS, InP/ZnSeTe/ZnS, and InP/MnSe/ZnS may include at least one selected from the group consisting of, but is not limited thereto.

In general, quantum dots may be manufactured by a wet chemical process, a metal organic chemical vapor deposition (MOCVD) process, or a molecular beam epitaxy (MBE) process.

The quantum dots according to the present invention may be synthesized by a wet chemical process.

The wet chemical process is a method of growing particles by putting a precursor material in an organic solvent. When the crystal grows, the organic solvent naturally coordinates on the surface of the quantum dot crystal and acts as a dispersant to control the growth of the crystal. It is possible to control the size growth of quantum dot particles through an easier and cheaper process than vapor deposition such as molecular beam epitaxy.

In the case of producing quantum dots by a wet chemical process, an organic ligand is used to prevent aggregation of quantum dots and to control the particle size of quantum dots to a nano level. As such an organic ligand, oleic acid may be generally used.

In one embodiment of the present invention, the oleic acid used in the manufacturing process of the quantum dots is replaced by the compound represented by the formula (1) by the ligand exchange method.

The ligand exchange is an original organic ligand, that is, to a dispersion containing quantum dots having oleic acid, an organic ligand to be exchanged, that is, a compound represented by Formula 1 is added, and the mixture is stirred at room temperature to 200° C. for 30 minutes to 3 hours. to obtain a quantum dot to which the compound represented by Formula 1 is bound. If necessary, a process of separating and purifying the quantum dots to which the compound of Formula 1 is bound may be additionally performed.

Quantum dots according to an embodiment of the present invention can be produced by an organic ligand exchange method under a simple stirring treatment at room temperature as described above, so there is an advantage that mass production is possible.

In addition, the quantum dot according to an embodiment of the present invention can maintain a quantum efficiency of about 90% or more compared to the initial quantum efficiency even after 15 days, so that it can be stably stored for a long period of time, so that it can be commercialized for various purposes.

< Quantum Dot Dispersion >

The quantum dot dispersion according to an embodiment of the present invention is characterized in that it contains the above-described quantum dots and a photopolymerizable monomer.

photopolymerizable monomer

The photopolymerizable monomer serves to improve the dispersibility of quantum dots.

Examples of the photopolymerizable monomer include monofunctional monomers, bifunctional monomers, and other polyfunctional monomers, and preferably, bifunctional or higher functional monomers may be used.

The type of the monofunctional monomer is not particularly limited, and for example, nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, and 2-hydroxyethyl acryl rate etc. are mentioned.

The type of the bifunctional monomer is not particularly limited, and for example, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, Neopentyl glycol di (meth) acrylate, dineopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate , polypropylene glycol di(meth)acrylate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, and the like.

The type of the polyfunctional monomer is not particularly limited, and for example, trimethylolpropane tri(meth)acrylate, oxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth) Acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa ( Meth) acrylate, propoxylated dipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. are mentioned.

When the quantum dot dispersion according to the present invention includes the photopolymerizable monomer, the content of the photopolymerizable monomer may be included in an amount of 10 to 90% by weight, preferably 20 to 80% by weight, based on the total weight of the quantum dot dispersion. Preferably, it may be included in an amount of 30 to 70% by weight. When the photopolymerizable monomer is included within the above range, it is preferable because the dispersibility characteristics of the quantum dots are good, so that the coating or jetting properties are excellent, and the optical properties and reliability are excellent.

< Quantum dot light emitting diode >

A quantum dot light-emitting diode (QLED) according to an embodiment of the present invention may include the above-described quantum dots.

The quantum dot light emitting diode is an electroluminescence (EL) type device that electrically excites quantum dots to emit light.

In the quantum dot light emitting diode, electrons and holes injected from both electrodes form excitons in the quantum dot light emitting layer, and light is emitted through radiative recombination of the excitons. Since it has the same principle of operation as organic light-emitting diode (OLED), it is composed by replacing only the light-emitting layer with quantum dots instead of organic light-emitting materials in a multilayer device structure using the electron/hole injection layer and transport layer of conventional OLEDs as they are. can be

The manufacturing method of the quantum dot light emitting diode of the present invention is not particularly limited, and a method known in the art may be used.

For example, in the method of manufacturing a quantum dot light emitting diode, an anode, a cathode, an electron injection/transport layer, a light emitting layer, a hole transport layer, and a hole injection layer may be sequentially stacked.

For another embodiment, the method of manufacturing a quantum dot light emitting diode may be manufactured by sequentially stacking a cathode, an electron injection/transport layer, a light emitting layer, a hole transport layer, a hole injection layer, and an anode, in another embodiment, for example, quantum dot light emitting The manufacturing method of the diode may be manufactured by sequentially stacking an anode, a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, an electron injection/transport layer, and a cathode.

In this case, the light emitting layer may include the above-described quantum dots.

< Quantum dot film >

The quantum dot film according to an embodiment of the present invention may include the above-described quantum dots.

The quantum dot film includes a polymer resin and a quantum dot dispersion layer comprising the aforementioned quantum dots dispersed in the polymer resin.

The polymer resin includes, for example, epoxy, epoxy acrylate, lauryl acrylate, norborene, polyethylene, polystyrene, ethylene-styrene copolymer, acrylate containing bisphenol A and bisphenol A derivatives, and fluorene derivatives. Acrylates, isobornyl acrylates, polyphenylalkylsiloxanes, polydiphenylsiloxanes, polydialkylsiloxanes, silsesquioxanes, silicone fluoride, vinyl and hydride-substituted lycones, etc. can be used, and these polymer resins are independent Or two or more types may be mixed and used.

The quantum dot film may further include a barrier layer on at least one surface of the quantum dot dispersion layer.

The barrier layer may have an oxygen permeability of 0.001 cm 3 /m 2 ·day·bar or less and a moisture permeability of 0.001 g/m2·day or less, such as polyester, polycarbonate, polyolefin, cyclic olefin polymer or polyimide. can do.

The quantum dot dispersion layer may have a thickness of 10 μm to 100 μm, and the barrier layer may have a thickness of 50 μm to 70 μm.

The manufacturing method of the quantum dot film of the present invention is not particularly limited, and a method known in the art may be used.

In one embodiment, the method of manufacturing a quantum dot film,

a) preparing a lower transparent substrate;

b) forming a quantum dot thin film by applying a quantum dot dispersion to the lower transparent substrate; and

c) laminating an upper transparent substrate on the quantum dot thin film to prepare a quantum dot film; may include.

< Light conversion curable composition >

The light conversion curable composition according to the present invention includes at least one of quantum dots, scattering particles, a photopolymerizable monomer and a photopolymerization initiator, and may contain at least one selected from antioxidants, alkali-soluble resins and solvents as needed. and, in particular, it is preferable to include an antioxidant.

The light conversion curable composition may be a light conversion ink composition or a light conversion resin composition, and the light conversion curable composition according to an embodiment of the present invention may be a solvent-free type that does not contain a solvent in terms of continuous processability. Since the quantum dot ink composition has high dispersibility and viscosity stability, it can be suitably used in a continuous process according to an inkjet method.

The method for preparing the light conversion curable composition of the present invention is not particularly limited, and a method known in the art may be used.

The light conversion curable composition thus prepared may be preferably used for manufacturing a cured film such as a color filter, a light conversion laminated substrate, and an image display device including the same.

Quantum dots and photopolymerizable monomers

The description of the quantum dots included in the light conversion curable composition according to the present invention is equally applicable to the quantum dots of the present invention described above.

The quantum dots are preferably used by preparing a quantum dot dispersion in which the quantum dots are uniformly dispersed. The quantum dot dispersion includes the aforementioned quantum dots, and includes at least one of a first photopolymerizable monomer and a solvent. In addition, the light conversion curable composition including the quantum dot dispersion may further include a second photopolymerizable monomer, and the first photopolymerizable monomer and the second photopolymerizable monomer may be the same type of monomer.

The description of the photopolymerizable monomer is the same as the description of the quantum dot dispersion described above, and the specific details regarding the solvent will be described later.

The quantum dots may be included in an amount of 1 to 75% by weight, preferably 3 to 70% by weight, more preferably 5 to 60% by weight, based on the total weight of the light conversion curable composition. When the quantum dots are included within the above range, there is an advantage in that the luminous efficiency is excellent and the reliability of the light conversion coating layer made of the light conversion curable composition is excellent.

The content of the photopolymerizable monomer may be 10 to 90% by weight, preferably 25 to 85% by weight, based on the total weight of the light conversion curable composition. When the photopolymerizable monomer is included within the above range, it is preferable because the dispersibility characteristics of the quantum dots are good, so that the coating or jetting properties are excellent, and the optical properties and reliability are excellent.

In addition, when included as a quantum dot dispersion, the content of the quantum dot dispersion may be included in an amount of 10 to 80% by weight based on the total weight of the light conversion curable composition.

scattering particles

The scattering particles may use a conventional inorganic material, and preferably may include a metal oxide having an average particle diameter of 30 to 1000 nm.

The metal oxide is Li, Be, B, Na, Mg, Al, Si, K, Ca, Sc, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Mo, Cs, Ba, La, Hf, W, Tl, Pb, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Ti, Sb, Sn, Zr, Nb, It may be an oxide including one type of metal selected from the group consisting of Ce, Ta, In, and combinations thereof, but is not limited thereto.

Specifically, Al ₂ O ₃ , SiO ₂ , ZnO, ZrO ₂ , BaTiO ₃ , TiO ₂ , Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, MgO and One selected from the group consisting of combinations thereof is possible. If necessary, a material surface-treated with a compound having an unsaturated bond such as acrylate may be used.

When the quantum dot light conversion composition according to the present invention includes scattering particles, it is preferable to increase the path of light spontaneously emitted from the quantum dots through the scattering particles, thereby increasing the overall light efficiency in the color filter.

Preferably, the scattering particles may have an average particle diameter of 30 to 1000 nm, preferably 100 to 500 nm. At this time, if the particle size is too small, a sufficient scattering effect of light emitted from the quantum dots cannot be expected. use it

photopolymerization initiator

The photopolymerization initiator is a compound for initiating polymerization of the photopolymerizable monomer described above, and is not particularly limited in the present invention, but in terms of polymerization characteristics, initiation efficiency, absorption wavelength, availability, price, etc., acetophenone-based compound, benzophenone It is preferable to use at least one compound selected from the group consisting of a non-based compound, a triazine-based compound, an oxime-based compound, a thioxanthone-based compound, and a benzoin-based compound.

Specific examples of the acetophenone-based compound include 2,2'-diethoxyacetophenone, 2,2'-dibutoxyacetophenone, 2-hydroxy-2-methylpropiophenone, pt-butyltrichloroacetophenone , pt-Butyldichloroacetophenone, 4-chloroacetophenone, 2,2'-dichloro-4-phenoxyacetophenone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropane -1-one and the like.

Examples of the benzophenone-based compound include benzophenone, benzoyl benzoic acid, methyl benzoyl benzoate, 4-phenyl benzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4'-bis(dimethyl amino)benzophenone, 4,4'- bis(diethylamino)benzophenone, 4,4'-dimethylaminobenzophenone, 4,4'-dichlorobenzophenone, 3,3'-dimethyl-2-methoxybenzophenone, etc. are mentioned.

Examples of the triazine-based compound include 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloromethyl)-s-triazine, and 2-(3',4'-dime Toxy styryl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4'-methoxy naphthyl)-4,6-bis(trichloromethyl)-s-triazine, 2 -(p-methoxyphenyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-tolyl-4,6-bis(trichloromethyl)-s-triazine, 2- Piphenyl-4,6-bis(trichloromethyl)-s-triazine, bis(trichlorobetyl)-6-styryl-s-triazine, 2-(naphtho 1-yl)-4,6- Bis (trichloro methyl) -s-triazine, 2- (4-methoxy naphtho 1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2-4-trichloro methyl ( piperonyl)-6-triazine, 2,4-trichloromethyl(4'-methoxy styryl)-6-triazine, and the like.

Examples of the oxime compound include N-benzoyloxy-1-(4-phenylsulfanylphenyl)butan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl) ) Octan-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropan-1-one-2-imine, N-acetyloxy-1-[9 -Ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine, N-acetyloxy-1-[9-ethyl-6-{2-methyl-4-(3) ,3-Dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethan-1-imine, N-acetyloxy-1-[9-ethyl6-(2-) Methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropan-1-imine, N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazole- 3-yl]-3-cyclopentylpropan-1-one-2-imine, N-acetyloxy-1-[9-(2-ethylhexyl)-6-(2,4,6-trimethylbenzoyl)-9H -benzo[i]carbazol-3-yl]-3-[1-(2,2,3,3-tetrafluoropropyloxy)phenyl]methanimine etc. are mentioned.

As the thioxanthone-based compound, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropyl thioxanthone, 2,4-diethyl thioxanthone, 2,4-diisopropyl thi Oxanthone, 2-chlorothioxanthone, etc. are mentioned.

Examples of the benzoin-based compound include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and benzyldimethyl ketal.

In addition to those exemplified above, carbazole-based compounds, diketone-based compounds, sulfonium borate-based compounds, diazo-based compounds, biimidazole-based compounds, and acylphosphine-based compounds may also be used as the photopolymerization initiator.

The content of the photopolymerization initiator may be 0.1 to 20% by weight, preferably 1 to 15% by weight, based on the total weight of the light conversion curable composition. When the photopolymerization initiator is included within the above range, photopolymerization occurs sufficiently during exposure in the pattern forming process, and a decrease in transmittance due to the unreacted initiator remaining after photopolymerization can be prevented, which is preferable.

antioxidant

The light conversion curable composition according to the present invention may further include an antioxidant to improve surface roughness, and the antioxidant reacts with oxygen radicals that may be generated during the process to help prevent the quantum dots from being oxidized.

The antioxidant may include at least one selected from a phosphorus antioxidant, a phenolic antioxidant, and a sulfur antioxidant, and may remove or decompose both oxygen radicals and peroxides to improve light resistance, and quantum dots agglomerate It is preferable to include a phosphorus-based antioxidant and a phenol-based antioxidant together from the viewpoint of improving viscosity stability by preventing it from forming.

In addition, the antioxidant may include at least one selected from compounds represented by the following Chemical Formulas 3-1 to 3-7.

[Formula 3-1]

In Formula 3-1, R ₁₃ is an alkylene group having 1 to 10 carbon atoms, and R ₁₄ to R ₂₅ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms.

[Formula 3-2]

In Formula 3-2, R ₂₆ to R ₃₄ are each independently a hydrogen atom or a substituted or unsubstituted C 1 to C 20 alkyl group.

[Formula 3-3]

In Formula 3-3, R ₃₆ and R ₃₇ are an alkylene group having 1 to 10 carbon atoms, and R ₃₈ to R ₄₁ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms. .

[Formula 3-4]

In Formula 3-4, R ₄₂ to R ₄₅ are an alkylene group having 1 to 10 carbon atoms, and R ₄₆ to R ₅₃ are each independently a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms. .

[Formula 3-5]

In Formula 3-5, R ₅₅ to R ₅₇ are each independently a substituted or unsubstituted C1-C20 alkyl group or a C6-C20 aryl group.

[Formula 3-6]

In Formula 3-6, R ₅₈ is -(OCH ₂ CH ₂ ) _k -, k is an integer of 1 to 5, R ₅₉ and R ₆₀ is each independently an alkylene group having 1 to 10 carbon atoms, and R ₆₁ to R ₆₈ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms.

[Formula 3-7]

In Formula 3-7, R ₆₉ is an alkylene group having 1 to 10 carbon atoms, R ₇₀ to R ₇₃ are each independently a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and R ₇₄ is an alkyl group having 1 to 30 carbon atoms.

In an embodiment of the present invention, the antioxidant may include a compound represented by Formula 3-1 and a compound represented by Formula 3-5. In this case, since the effect of improving the surface roughness can be maximized, it is preferable.

The phosphorus-based antioxidant is, for example, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphospha Spiro[5.5]undecane, diisodecylpentaerythritol 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]dioxaphosphepine, triphenylphosphite, diphenylisodecylphosphite, phenyldiisodecylphosphite, 4,4'- Butylidene-bis(3-methyl-6-t-butylphenylditridecyl)phosphite, octadecylphosphite, tris(nonylphenyl)phosphite, 9,10-dihydro-9-oxa-10-phosphite Paphenanthrene-10-oxide, 10-(3,5-di-t-butyl-4-hydroxybenzyl)-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 neopentanetetrayl Bis(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, etc., and preferably 6-[3-(3) -t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine and Diphenylisodecylphosphite may be used, but is not limited thereto.

The phenolic antioxidant is, for example, 3,9-bis[2-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethoxy ]-2,4,8,10-tetraoxaspiro[5.5]undecane, pentaerythritol 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 and tetrakis[methylene-3-(3,5'-di -t-butyl-4'-hydroxyphenylpropionate)]methane, etc. are mentioned, Preferably pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl) etc. are mentioned. ) propionate], 2,2-thio-diethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 4,4'-butylidene-bis (3-methyl-6-t-butylphenol), octadecyl-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate and triethyleneglycol-bis[3-(3) -t-butyl -5-methyl-4-hydroxyphenyl) propionate], but is not limited thereto.

The sulfur-based antioxidant is, for example, 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl-bis[3-(dodecylthiodipropio) nate, dimyristyl-3,3'-thiodipropionate, distearyl-3,3'-thiodipropionate, pentaerythrityl-tetrakis(3-laurylthiopropionate) and 2-mercaptobenzimidazole and the like, but are not limited thereto.

In one embodiment of the present invention, the antioxidant may be a compound containing two or more selected from a phosphorus atom, a sulfur atom and a phenol group in one molecule, and a specific example thereof is 6-[3-(3-t-) Butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine and 2,2 -thio-diethylenebisthio)propionate], 2-mercaptobenzimidazole, dilauryl-3,3'-[3-(3,5-di-t-butyl-4-hydroxyphenyl)prop cionate], but is not limited thereto.

The antioxidant may be included in an amount of 0.1 to 20% by weight, preferably 0.1 to 15% by weight, based on the total weight of the light conversion curable composition. When the antioxidant is included within the above range, it is possible to effectively prevent the oxidation of quantum dots during the process to minimize a decrease in quantum efficiency, and there is an advantage in that the surface roughness is improved.

Alkali-soluble resin

The light conversion curable composition according to the present invention may further include an alkali-soluble resin if necessary, and the alkali-soluble resin may be at least one selected from the group consisting of an acrylic alkali-soluble resin and a cardo-based alkali-soluble resin.

The acrylic alkali-soluble resin or cardo-based alkali-soluble resin has reactivity by the action of light or heat, and serves to improve the dispersibility of quantum dots. The acrylic alkali-soluble resin or cardo-based alkali-soluble resin contained in the light conversion curable composition of the present invention acts as a binder resin for quantum dots, and is not particularly limited as long as it is a resin that can be used as a support for the light conversion coating layer.

When the light conversion curable composition of the present invention includes an alkali-soluble resin, the content of the alkali-soluble resin may be 5 to 80 wt%, preferably 10 to 70 wt%, based on the total weight of the light conversion curable composition. . When the alkali-soluble resin is included within the above range, it is preferable because the reduction in the film thickness of the pixel portion can be prevented and the dispersibility characteristics of the quantum dots are improved.

solvent

The light conversion curable composition according to the present invention is preferably a solvent-free type that does not contain a solvent in terms of continuous processability, but may further include a solvent if necessary, and the solvent dissolves other components included in the light change curable composition. As long as it is effective, a solvent commonly used in the art may be used without particular limitation.

The solvent may be used by selecting one or more types from ethers, acetates, aromatic hydrocarbons, ketones, alcohols, esters, and amides as specific examples, but is not limited thereto.

The ether solvent is specifically, ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether; propylene glycol monoalkyl ethers such as propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, and propylene glycol monobutyl ether; diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; and the like.

The acetate solvent is specifically, alkylene glycol alkyl ether acetates such as methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate; alkoxyalkyl acetates such as methoxybutyl acetate, methoxypentyl acetate, and n-pentyl acetate; and the like.

Specific examples of the aromatic hydrocarbon solvent include benzene, toluene, xylene, and mesitylene.

Specific examples of the ketone solvent include methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone.

Specific examples of the alcohol solvent include ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin.

Specifically, the ester solvents include cyclic esters such as γ-butyrolactone; 3-ethoxy ethyl propionate, 3-methoxy methyl propionate, ethyl 3-ethoxy propionate, etc. are mentioned.

Specific examples of the amide solvent include N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone.

These solvents can be used individually or in mixture of 2 or more types, respectively.

When the light conversion curable composition of the present invention includes the solvent, the content of the solvent may be 10 to 90 wt%, preferably 20 to 80 wt%, more preferably based on the total weight of the light conversion curable composition. It may be included in an amount of 30 to 70% by weight. When the solvent is included within the above range, it is preferable because the dispersibility characteristics of the quantum dots are good, the coating or jetting characteristics are excellent, and the optical characteristics and reliability are excellent.

< Cured film >

The present invention provides a cured film formed by using the light conversion ink composition, and the cured film may be a color filter or a light conversion laminated substrate.

color filter

A method of forming a pattern for forming the color filter of the present invention may use a method known in the art.

In one embodiment, the pattern forming method,

a) applying a photoconversion ink composition to a substrate;

b) a prebaking step of drying the solvent;

c) applying a photomask on the obtained film and irradiating actinic light to cure the exposed portion;

d) performing a developing process for dissolving the unexposed portion using an aqueous alkali solution; and

e) performing drying and post-baking; may include.

The substrate may be a glass substrate or a polymer substrate, but is not limited thereto. As a glass substrate, especially soda-lime glass, barium or strontium containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, quartz, etc. can be used preferably. Examples of the polymer substrate include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide or polysulfone substrates.

At this time, the application may be performed by a known wet coating method using an application device such as a roll coater, a spin coater, a slit and spin coater, a slit coater (sometimes referred to as a die coater), or an inkjet so as to obtain a desired thickness. .

Prebaking is performed by heating with an oven, a hot plate, etc. At this time, the heating temperature and heating time in the pre-bake may be appropriately selected depending on the solvent to be used, and may be performed, for example, at a temperature of 80 to 150° C. for 1 to 30 minutes.

Moreover, exposure performed after prebaking is performed by an exposure machine, and only the part corresponding to a pattern is exposed by exposing through a photomask. In this case, the light to be irradiated may be, for example, visible light, ultraviolet light, X-ray, electron beam, or the like.

The image development process which melt|dissolves an unexposed part using the aqueous alkali solution after exposure is performed for the objective of removing the photosensitive resin composition of the part which is not removed of an unexposed part, and a desired pattern is formed by this image development. As a developing solution suitable for image development using this aqueous alkali solution, the aqueous solution of the carbonate of an alkali metal or alkaline-earth metal, etc. can be used, for example. In particular, it can be carried out using a developing device or an ultrasonic cleaner within a temperature of 10 to ℃, preferably 20 to ℃, using an aqueous alkali solution containing less than 1 to weight % of carbonates such as sodium carbonate, potassium carbonate, lithium carbonate, etc. have.

The post-baking is performed to increase the adhesion between the patterned film and the substrate, and for example, may be performed through heat treatment at 80° C. for 10 minutes. The post-baking may be performed using an oven, a hot plate, or the like, like the pre-bake.

Light Conversion Laminated Materials

The light conversion laminated substrate according to the present invention includes a cured product of the light conversion ink composition. Since the light conversion laminated substrate includes a light conversion resin composition that can be coated on a glass substrate, a solvent that does not correspond to a substance harmful to the human body can be used, thereby improving worker safety and product productivity.

The light conversion laminated substrate may be silicon (Si), silicon oxide (SiOx), or a polymer substrate, and the polymer substrate may be polyethersulfone (PES) or polycarbonate (PC).

The light conversion laminated substrate may be formed by applying the light conversion resin composition and thermosetting.

< Image display device >

The image display device according to the present invention includes the above-described color filter or light conversion laminated substrate. The image display device is specifically, a liquid crystal display (liquid crystal display device; LCD), an organic EL display (organic EL display device), a liquid crystal projector, a display device for a game machine, a display device for a portable terminal such as a mobile phone, a display for a digital camera display devices such as a device and a display device for car navigation, and the like, and a color display device is particularly suitable.

The image display device includes a configuration known to those skilled in the art, except for having the color filter or the light conversion laminated substrate, and may further include, that is, the present invention includes a color filter or a light It includes an image display device to which a conversion laminated substrate can be applied.

The image display device including the color filter according to the present invention may have excellent characteristics in color reproducibility, luminance, light resistance and reliability.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples.

Synthesis Example 1: InP/ZnSe/ZnS core-shell quantum dot synthesis

0.4 mmol (0.058 g) of indium acetate, 0.6 mmol (0.15 g) of palmitic acid, and 20 mL of 1-octadecene were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen. After heating to 280° C., a mixed solution of 0.2 mmol (58 μl) of tris(trimethylsilyl)phosphine (TMS3P) and 1.0 mL of trioctylphosphine was rapidly injected and reacted for 0.5 minutes.

Then, 2.4 mmol of zinc acetate (0.448 g), 4.8 mmol of oleic acid and 20 mL of trioctylamine were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the temperature of the reactor was raised to 280°C. 2 mL of the previously synthesized InP core solution was added, and then 4.8 mmol of selenium (Se/TOP) in trioctylphosphine was added, and the final mixture was reacted for 2 hours. Ethanol was added to the reaction solution cooled quickly to room temperature, and the precipitate obtained by centrifugation was filtered under reduced pressure and dried under reduced pressure to form an InP/ZnSe core-shell.

Then, 2.4 mmol of zinc acetate (0.448 g), 4.8 mmol of oleic acid and 20 mL of trioctylamine were placed in a reactor and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the temperature of the reactor was raised to 280°C. 2 mL of the previously synthesized InP core solution was added, followed by 4.8 mmol of sulfur (S/TOP) in trioctylphosphine, and the final mixture was reacted for 2 hours. Ethanol was added to the reaction solution cooled quickly to room temperature, and the precipitate obtained by centrifugation was filtered under reduced pressure and dried under reduced pressure to obtain quantum dots of InP/ZnSe/ZnS core-shell structure, which were then dispersed in chloroform. The solid content was adjusted to 10%. The maximum emission wavelength was 520 nm.

Preparation of quantum dot dispersions according to Examples and Comparative Examples

Example 1: Ligand substitution reaction (A-1)

5 mL of the quantum dot solution obtained in Synthesis Example 1 was placed in a centrifuge tube, and 20 mL of ethanol was added to precipitate. Discard the supernatant through centrifugation, add 3 mL of chloroform to the precipitate to disperse quantum dots, and then add 2.50 g of 2-(2-(2-methoxypropoxy)propoxy)propyl 3-mercaptopropanoate represented by Formula 1-1 below. The reaction was carried out for one hour while heating to 60 °C under a nitrogen atmosphere.

[Formula 1-1]

Then, 25 mL of n-hexane was added to the reaction to precipitate quantum dots, centrifuged to separate the precipitate, and then 1,6-Hexanediol diacrylate was added to a solid content of 50% and stirred to prepare a quantum dot dispersion. . The maximum emission wavelength was 520 nm.

Example 2: Ligand substitution reaction (A-2)

In the same manner as in Example 1, except that 3-(1-(1-phenoxypropan-2-yloxy)propan-2-yloxy)propanoic acid represented by the following formula 1-2 was used instead of the ligand used in Example 1 did. The maximum emission wavelength was 521 nm.

[Formula 1-2]

Example 3: Ligand substitution reaction (A-3)

The same procedure as in Example 1 was performed, except that 3-(2-(2-(acryloyloxy)propoxy)propoxy)propanoic acid represented by the following Chemical Formula 1-3 was used instead of the ligand used in Example 1. The maximum emission wavelength was 520 nm.

[Formula 1-3]

Example 4: Ligand substitution reaction (A-4)

The same procedure as in Example 1 was performed, except that 3-(1-methoxydodecan-2-yloxy)propanoic acid represented by the following Chemical Formula 1-4 was used instead of the ligand used in Example 1. The maximum emission wavelength was 522 nm.

[Formula 1-4]

Example 5: Ligand substitution reaction (A-5)

The same procedure as in Example 1 was performed, except that 3-(2-(2-(cyclohexyloxy)propoxy)propoxy)butan-1-amine represented by the following Chemical Formula 1-5 was used instead of the ligand used in Example 1. The maximum emission wavelength was 520 nm.

[Formula 1-5]

Example 6: Ligand Substitution Reaction (A-6)

The same procedure as in Example 1 was performed except that 3-mercapto-N-(2-(2-(vinyloxy)propoxy)propyl)propanamide represented by the following formula 1-6 instead of the ligand used in Example 1 was used. The maximum emission wavelength was 520 nm.

[Formula 1-6]

Example 7: Ligand substitution reaction (A-7)

The same procedure as in Example 1 was performed, except that 3-(3-methoxypropoxy)propyl 3-mercaptopropanoate represented by the following Chemical Formula 2-1 was used instead of the ligand used in Example 1. The maximum emission wavelength was 521 nm.

[Formula 2-1]

Example 8: Ligand Substitution Reaction (A-8)

Except for using 3-(3-(3-methoxy-2,2-dimethylpropoxy)-2,2-dimethylpropoxy)propanoic acid represented by the following formula 2-2 instead of the ligand used in Example 1, Proceeded in the same way. The maximum emission wavelength was 520 nm.

[Formula 2-2]

Example 9: Ligand substitution reaction (A-9)

In the same manner as in Example 1, except that 4-(4-(vinyloxy)butan-2-yloxy)butan-2-yl 3-mercaptopropanoate represented by the following Chemical Formula 2-3 was used instead of the ligand used in Example 1 did. The maximum emission wavelength was 521 nm.

[Formula 2-3]

Example 10: Ligand Substitution Reaction (A-10)

The same procedure as in Example 1 was carried out, except that 2-(4-(2-methyl-3-phenoxypropoxy)butan-2-yloxy)ethanamine represented by the following formula 2-4 instead of the ligand used in Example 1 was used. . The maximum emission wavelength was 521 nm.

[Formula 2-4]

Comparative Example 1: Ligand substitution reaction (A-11)

The same procedure as in Example 1 was performed except that 2-[2-(2-Methoxyethoxy)ethoxy]acetic acid represented by the following Chemical Formula 3-1 was used instead of the ligand used in Example 1. The maximum emission wavelength was 521 nm.

[Formula 3-1]

Comparative Example 2: Ligand substitution reaction (A-12)

The same procedure as in Example 1 was performed, except that 2-(2-methoxyethoxy)ethyl 2-mercaptoacetate represented by the following Chemical Formula 3-2 was used instead of the ligand used in Example 1. The maximum emission wavelength was 520 nm.

[Formula 3-2]

Comparative Example 3: Ligand substitution reaction (A-13)

The same procedure as in Example 1 was performed, except that 8-Phenyloctanoic acid represented by the following Chemical Formula 3-3 was used instead of the ligand used in Example 1. The maximum emission wavelength was 521 nm.

[Formula 3-3]

Comparative Example 4: Ligand substitution reaction (A-14)

The same procedure as in Example 1 was performed, except that 3-(8-methoxyoctyloxy)propanoic acid represented by the following Chemical Formula 3-4 was used instead of the ligand used in Example 1. The maximum emission wavelength was 522 nm.

[Formula 3-4]

Comparative Example 5: Ligand substitution reaction (A-15)

The same procedure as in Example 1 was performed, except that 3-aminopropyl acrylate represented by the following Chemical Formula 3-5 was used instead of the ligand used in Example 1. The maximum emission wavelength was 520 nm.

[Formula 3-5]

Comparative Example 6: Ligand substitution reaction (A-16)

The same procedure as in Example 1 was performed, except that 6-cyclohexylhexanoic acid represented by the following Chemical Formula 3-6 was used instead of the ligand used in Example 1. The maximum emission wavelength was 521 nm.

[Formula 3-6]

Examples 11 to 30 and Comparative Examples 7 to 13: Preparation of light conversion curable composition

Using the quantum dot dispersions prepared in Examples 1 to 11 and Comparative Examples 1 to 6, according to the components and contents shown in Tables 1 to 3 below, Examples 11 to 30 and Comparative Examples 7 to 13 A light conversion curable composition was prepared.

(weight%) Example 11 12 13 14 15 16 17 18 19 20 Quantum Dot Dispersion A-1 50 - - - - - - - - - A-2 - 50 - - - - - - - - A-3 - - 50 - - - - - - - A-4 - - - 50 - - - - - - A-5 - - - - 50 - - - - - A-6 - - - - - 50 - - - - A-7 - - - - - - 50 - - - A-8 - - - - - - - 50 - - A-9 - - - - - - - - 50 - A-10 - - - - - - - - - 50 A-11 - - - - - - - - - - A-12 - - - - - - - - - - A-13 - - - - - - - - - - A-14 - - - - - - - - - - A-15 - - - - - - - - - - A-16 - - - - - - - - - - photopolymerizable monomer MN-1 43 43 43 43 43 43 43 43 43 43 photopolymerization initiator PI-1 One One One One One One One One One One scattering particles 6 6 6 6 6 6 6 6 6 6 antioxidant O-1 - - - - - - - - - - O-2 - - - - - - - - - - O-3 - - - - - - - - - - O-4 - - - - - - - - - - O-5 - - - - - - - - - - O-6 - - - - - - - - - - O-7 - - - - - - - - - -

(weight%) Example 21 22 23 24 25 26 27 28 29 30 Quantum Dot Dispersion A-1 50 - - - - - - - - - A-2 - 50 - - - - - - - - A-3 - - 50 - - - - - - - A-4 - - - 50 - - - - - - A-5 - - - - 50 - - - - - A-6 - - - - - 50 - - - - A-7 - - - - - - 50 - - - A-8 - - - - - - - 50 - - A-9 - - - - - - - - 50 - A-10 - - - - - - - - - 50 A-11 - - - - - - - - - - A-12 - - - - - - - - - - A-13 - - - - - - - - - - A-14 - - - - - - - - - - A-15 - - - - - - - - - - A-16 - - - - - - - - - - photopolymerizable monomer MN-1 40 40 40 40 40 40 40 40 40 40 photopolymerization initiator PI-1 One One One One One One One One One One scattering particles 6 6 6 6 6 6 6 6 6 6 antioxidant O-1 3 - - - - - - 3 - - O-2 - 3 - - - - - - 3 - O-3 - - 3 - - - - - - 3 O-4 - - - 3 - - - - - - O-5 - - - - 3 - - - - - O-6 - - - - - 3 - - - - O-7 - - - - - - 3 - - -

(weight%) comparative example 7 8 9 10 11 12 13 Quantum Dot Dispersion A-1 - - - - - - - A-2 - - - - - - - A-3 - - - - - - - A-4 - - - - - - - A-5 - - - - - - - A-6 - - - - - - - A-7 - - - - - - - A-8 - - - - - - - A-9 - - - - - - - A-10 - - - - - - - A-11 50 - - - - - 50 A-12 - 50 - - - - - A-13 - - 50 - - - - A-14 - - - 50 - - - A-15 - - - - 50 - - A-16 - - - - - 50 - photopolymerizable monomer MN-1 43 43 43 43 43 43 40 photopolymerization initiator PI-1 One One One One One One One scattering particles 6 6 6 6 6 6 6 antioxidant O-1 - - - - - - 3 O-2 - - - - - - - O-3 - - - - - - - O-4 - - - - - - - O-5 - - - - - - - O-6 - - - - - - - O-7 - - - - - - -

- A-1 to 10: quantum dot dispersion according to Examples 1 to 10

- A-11 to 16: quantum dot dispersion according to Comparative Examples 1 to 6

- MN-1: 1,6-Hexanediol diacrylate (Aldrich)

- PI-1: Irgacure OXE-01 (BASF)

- Scattering particles: TiO ₂ (Huntzmann, TR-88, particle size 220 nm)

- O-1: Irganox 1010 (BASF)

- O-2: Sumilizer GP (Sumitomo Chemical)

- O-3: Irganox 1035 (BASF)

- O-4: Sumilizer BBM-S (Sumitomo Chemical)

- O-5: 135A (Adeka Corporation)

- O-6: AO-50 (Adeka)

- O-7: Irganox 245 (BASF)

Experimental example

A light conversion coating layer was prepared as follows using the light conversion curable composition prepared in Examples 11 to 30 and Comparative Examples 7 to 13, and the film thickness, light conversion efficiency and adhesion at this time were measured in the following manner, The results are shown in Table 4 below.

<Preparation of light conversion coating layer>

Each of the light conversion curable compositions prepared in Examples and Comparative Examples was applied on a 5 cm × 5 cm glass substrate by an inkjet method, and then 1000 mJ/ After irradiation with cm 2 , the light conversion coating layer was prepared by heating in a heating oven at 180° C. for 30 minutes.

(1) film thickness

The film thickness of the light conversion coating layer prepared above was measured using a film thickness meter (Dektak 6M, Vecco), and the results are shown in Table 4 below.

(2) Evaluation of light conversion efficiency

After placing the prepared light conversion coating layer on a blue light source (XLamp XR-E LED, Royal blue 450, Cree Corporation), a luminance meter (CAS140CT Spectrometer, Instrument systems) and the following Equation 1 were used to measure and calculate the light conversion efficiency, and the results are shown in Table 4 below. The higher the light conversion efficiency (%), the better the luminance can be obtained.

[Equation 1]

(3) Viscosity stability evaluation

The viscosity of the light conversion curable composition is measured using an R-type viscometer (VISCOMETER MODEL RE120L SYSTEM, manufactured by Toki Sangyo Co., Ltd.), at a rotation speed of 20 rpm and a temperature of 30 ° C., initial viscosity and low temperature of 5 ° C. for 1 month. Then, the viscosity was measured. Accordingly, viscosity stability was evaluated according to the following evaluation criteria from the calculated rate of change of viscosity, and the results are shown in Table 4 below.

< Evaluation Criteria >

○: Viscosity change rate 105% or less

△: Viscosity change rate greater than 105% and less than 110%

×: Viscosity change rate exceeding 110%

(4) Adhesion evaluation

The prepared light conversion coating layer was subjected to a cross-cut test according to ASTM D3359, and the adhesive strength was evaluated according to the following evaluation criteria. After applying uniform force to the coating layer made with a knife, cut in a grid shape, and then apply tape to the cut surface and rub until it is completely attached. After 30 seconds, hold the end of the tape and pull it close to a 180 degree angle to remove the tape. Thus, the adhesion of the coating layer was evaluated based on the following criteria.

< Evaluation Criteria >

OB: Flakes and more than 65% fall off

1B: 35% or more and less than 65% of the area where the end of the cut part and the grid are separated

2B: The area where a part of the intersection of the cut part fell off was 15% or more and less than 35%

3B: The area where a part of the intersection of the cut part fell off was 5% or more and less than 15%

4B: less than 5% of the area where a part of the intersection of the cut part fell off

5B: The edge of the cut part is smooth and there is no lattice falling off

(5) Surface roughness evaluation

The surface roughness of the prepared light conversion coating layer was measured using a surface roughness meter DEKTAK-6M (Veeco), and the surface roughness was evaluated according to the following evaluation criteria. The results are shown in Table 4 below.

< Evaluation Criteria >

○: Surface roughness 10 nm or less

△: Surface roughness greater than 10 nm and less than 20 nm

×: surface roughness exceeding 20 nm

Film thickness (㎛) Light Conversion Efficiency (%) Viscosity Stability adhesion surface roughness Example 11 10 34 ○ 4B △ Example 12 10 33 ○ 4B △ Example 13 10 34 ○ 5B △ Example 14 10 32 ○ 3B △ Example 15 10 33 ○ 4B △ Example 16 10 34 ○ 5B △ Example 17 10 34 ○ 3B △ Example 18 10 33 ○ 4B △ Example 19 10 33 ○ 4B △ Example 20 10 34 ○ 3B △ Example 21 10 35 ○ 4B ○ Example 22 10 35 ○ 4B ○ Example 23 10 35 ○ 5B ○ Example 24 10 34 ○ 5B ○ Example 25 10 34 ○ 5B ○ Example 26 10 35 ○ 4B ○ Example 27 10 34 ○ 5B ○ Example 28 10 35 ○ 4B ○ Example 29 10 34 ○ 5B ○ Example 30 10 36 ○ 5B ○ Comparative Example 7 10 33 X OB X Comparative Example 8 10 34 △ 1B △ Comparative Example 9 10 31 △ 2B X Comparative Example 10 10 32 X 1B X Comparative Example 11 10 30 X 0B X Comparative Example 12 10 31 △ 1B X Comparative Example 13 10 33 X 0B X

As shown in the results of Table 4, the light conversion curable compositions of Examples 11 to 30 of the present application are excellent in viscosity stability (viscosity change rate of 105% or less), and the light conversion coating layer prepared from the compositions of Examples of the present invention has optical properties ( Light conversion efficiency 32% or more) and adhesion (3B or more) exhibited excellent characteristics. In addition, in the case of the light conversion curable compositions of Examples 21 to 30 further comprising an antioxidant, light conversion efficiency and adhesion were improved, and it was confirmed that they exhibited better effects in terms of surface roughness.

On the other hand, it was confirmed that the photoconversion ink compositions of Comparative Examples 7 to 13 had poor viscosity stability, limited storage, and remarkably poor adhesion and poor surface roughness.

As the specific part of the present invention has been described in detail above, for those of ordinary skill in the art to which the present invention pertains, it is clear that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereto. do. Those of ordinary skill in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.

Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (17)

A quantum dot having a ligand layer on its surface, comprising:
Quantum dots comprising a compound selected from the group consisting of a compound represented by the following formula (2), and a combination thereof, wherein the ligand layer is a compound represented by the following formula (1).
[Formula 1]

(In Formula 1,
A ₁ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group,
L ₁ is a linear or branched alkylene group having 1 to 30 carbon atoms,
L ₂ is a direct bond, ester, ether, or amide;
R ₁ to R ₄ are each independently hydrogen or a straight or branched chain alkyl group having 1 to 10 carbon atoms (provided _{that at least one of R 1} to R ₄ is a straight chain or branched chain alkyl group having 1 to 10 carbon atoms),
X ₁ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms,
n is an integer from 1 to 100)
[Formula 2]

(In Formula 2,
A ₂ is a thiol group, a carboxyl group, an amine group, or a phosphoric acid group,
L ₃ is a straight-chain or branched alkylene group having 1 to 30 carbon atoms,
L ₄ is a direct bond, ester, ether, or amide;
R ₅ to R ₁₀ are each independently hydrogen or a linear or branched alkyl group having 1 to 10 carbon atoms,
X ₂ is a linear or branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 30 carbon atoms, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or a photopolymerization reactive group having 2 to 30 carbon atoms,
m is an integer from 1 to 100) The method according to claim 1,
The photopolymerization reactive group is an alkenyl group, an alkynyl group, or an acrylate group, quantum dots. The method according to claim 1,
The ligand layer is a quantum dot comprising at least one selected from compounds represented by the following Chemical Formulas 1-1 to 1-9.
[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

[Formula 1-5]

[Formula 1-6]

[Formula 1-7]

[Formula 1-8]

[Formula 1-9]

The method according to claim 1,
The ligand layer is a quantum dot comprising at least one selected from compounds represented by the following Chemical Formulas 2-1 to 2-8.
[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 2-6]

[Formula 2-7]

[Formula 2-8]

The method according to claim 1,
The quantum dots have a core-shell structure comprising a core and a shell covering the core,
The core includes InP, InZnP, InGaP, CdSe, CdS, CdTe, ZnS, ZnSe, ZnTe, CdSeTe, CdZnS, CdSeS, PbSe, PbS, PbTe, AgInZnS, HgS, HgSe, HgTe, GaN, GaP, InGaAs, InGaN InAs, Contains at least one of ZnO,
The shell includes at least one of ZnS, ZnSe, ZnTe, ZnO, CdS, CdSe, CdTe, CdO, InP, InS, GaP, GaN, GaO, InZnP, InGaP, InGaN, InZnSCdSe, PbS, TiO, SrSe and HgSe. Quantum dots. The method according to claim 1,
The quantum dots include at least one selected from the group consisting of InP/ZnS, InP/ZnSe, InP/GaP/ZnS, InP/ZnSe/ZnS, InP/ZnSeTe/ZnS, and InP/MnSe/ZnS. , quantum dots. A quantum dot dispersion comprising the quantum dots according to any one of claims 1 to 6 and a photopolymerizable monomer. 8. The method of claim 7,
The photopolymerizable monomer is nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, 1,4-butanediol di (meth ) acrylate, 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, dineopentyl glycol di (meth) acrylate, triethylene glycol Di(meth)acrylate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, oxylated trimethylolpropane tri( Meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol Penta (meth) acrylate, ethoxylated dipentaerythritol hexa (meth) acrylate, propoxylated dipentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipropylene glycol di ( A quantum dot dispersion comprising at least one selected from the group consisting of meth) acrylate, tripropylene glycol di (meth) acrylate, and polypropylene glycol di (meth) acrylate. Quantum Dot Light-Emitting Diode (QLED) comprising the quantum dots according to any one of claims 1 to 6. A quantum dot film comprising the quantum dots according to any one of claims 1 to 6. A light conversion curable composition comprising the quantum dots, scattering particles, photopolymerizable monomers and photopolymerizable initiators according to any one of claims 1 to 6. 12. The method of claim 11,
A photoconversion curable composition further comprising at least one antioxidant selected from phosphorus-based antioxidants, phenol-based antioxidants and sulfur-based antioxidants. 13. The method of claim 12,
The antioxidant is a light conversion curable composition comprising at least one selected from compounds represented by the following Chemical Formulas 3-1 to 3-7.
[Formula 3-1]

(In Formula 3-1,
R ₁₃ is an alkylene group having 1 to 10 carbon atoms,
R ₁₄ to R ₂₅ are each independently a hydrogen atom, or a substituted or unsubstituted C 1 to C 20 alkyl group.)
[Formula 3-2]

(In Formula 3-2,
R ₂₆ to R ₃₄ are each independently a hydrogen atom or a substituted or unsubstituted C 1 to C 20 alkyl group.)
[Formula 3-3]

(In Formula 3-3,
R ₃₆ and R ₃₇ are an alkylene group having 1 to 10 carbon atoms,
R ₃₈ to R ₄₁ are each independently a hydrogen atom or a substituted or unsubstituted C 1 to C 20 alkyl group.)
[Formula 3-4]

(In Formula 3-4,
R ₄₂ to R ₄₅ are an alkylene group having 1 to 10 carbon atoms,
R ₄₆ to R ₅₃ are each independently a hydrogen atom or a substituted or unsubstituted C 1 to C 20 alkyl group.)
[Formula 3-5]

(In Formula 3-5,
R ₅₅ to R ₅₇ are each independently a substituted or unsubstituted C1-C20 alkyl group or a C6-C20 aryl group.)
[Formula 3-6]

(In Formula 3-6,
R ₅₈ is -(OCH ₂ CH ₂ ) _k -, and k is an integer of 1 to 5,
R ₅₉ and R ₆₀ are each independently an alkylene group having 1 to 10 carbon atoms,
R ₆₁ to R ₆₈ are each independently a substituted or unsubstituted C 1 to C 20 alkyl group.)
[Formula 3-7]

(In Formula 3-7,
R ₆₉ is an alkylene group having 1 to 10 carbon atoms,
R ₇₀ to R ₇₃ are each independently a hydrogen atom, or a substituted or unsubstituted C 1 to C 20 alkyl group,
R ₇₄ is an alkyl group having 1 to 30 carbon atoms.) 12. The method of claim 11,
Based on the total weight of the light conversion curable composition,
1 to 75% by weight of the quantum dots;
1 to 20% by weight of the scattering particles;
10 to 90% by weight of the photopolymerizable monomer; and
A light conversion curable composition comprising 0.1 to 20% by weight of the photopolymerization initiator. A cured film formed using the light conversion curable composition according to claim 11 . 16. The method of claim 15,
The cured film is a color filter or a light conversion laminated substrate cured film. An image display device comprising the cured film according to claim 15 .