KR20210102758A - Quantum Dot Dispersion and Curable Composition Comprising the Same - Google Patents

Abstract

The present invention relates to a quantum dot dispersion and a curable composition comprising the same. The quantum dot dispersion according to the present invention has excellent light resistance of quantum dots and excellent physical properties such as coating film hardness when applied to a coating film. Therefore, the quantum dot dispersion according to the present invention can be effectively applied to various quantum dot applications such as color filters and light conversion sheets to realize an image display device with excellent reliability.

Description

Quantum Dot Dispersion and Curable Composition Comprising the Same

The present invention relates to a quantum dot dispersion and a curable composition comprising the same, and more particularly, to a quantum dot dispersion having excellent light resistance of quantum dots and improving the coating film hardness when applying a coating film, and to a curable composition comprising the same .

As one of the methods of implementing a color filter in recent years, a pigment dispersion method using a pigment-dispersed photosensitive resin is applied. In addition, there is a problem in that color reproduction is lowered due to the characteristics of the pigment included in the color filter.

As a way to solve this problem, a color filter using a quantum dot photosensitive resin composition has been proposed. For example, Korean Patent Publication No. 2009-0036373 discloses that the display quality of a display device can be improved by improving the luminous efficiency by replacing the existing color filter with a light emitting layer made of a quantum dot phosphor.

In this way, when quantum dots are used as a light emitting material of a color filter, the light emission waveform can be narrowed, and high color reproduction ability that cannot be realized with pigments is obtained, and has excellent luminance characteristics. However, an image display device equipped with a quantum dot color filter uses blue light as a light source, but there is a problem in that the blue light used at this time deteriorates the optical characteristics of the quantum dot.

Therefore, the development of a technology capable of improving the light resistance of quantum dots is required.

In addition, when a coating film is formed using quantum dots, a method capable of increasing the physical properties of the coating film is required.

Korean Patent Publication No. 2009-0036373

One object of the present invention is to provide a quantum dot dispersion capable of improving light resistance and coating film hardness.

Another object of the present invention is to provide a curable composition comprising the quantum dot dispersion.

Another object of the present invention is to provide a cured film formed using the curable composition.

Another object of the present invention is to provide an image display device including the cured film.

On the other hand, the present invention provides a quantum dot dispersion comprising a quantum dot, and a compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group.

In one embodiment of the present invention, the compound having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group may include a compound represented by the following formula (1).

[Formula 1]

In the above formula,

또는

이고, Z is

or

ego,

R ¹ and R ² _{are each independently an absent or unsubstituted C 1} -C ₆ alkylene group in which at least one of the chain carbons is substituted with oxygen,

A is absent or is O, NR ⁴ or S,

R ³ and R ⁴ are each independently hydrogen or a C ₁ -C ₆ alkyl group,

n and m are each independently an integer of 1 to 4,

p is an integer from 1 to 100;

In one embodiment of the present invention, n and m may be 1.

The quantum dot dispersion according to an embodiment of the present invention may further include at least one of a curable monomer and a solvent.

On the other hand, the present invention provides a curable composition comprising the quantum dot dispersion.

In one embodiment of the present invention, the curable composition may be a light conversion ink composition, a light conversion resin composition, or a self-luminous photosensitive resin composition.

On the other hand, the present invention provides a cured film formed using the curable composition.

In one embodiment of the present invention, the cured film may be a color filter or a light conversion sheet.

On the other hand, the present invention provides an image display device including the cured film.

The quantum dot dispersion according to the present invention has excellent light resistance of quantum dots and excellent physical properties such as coating film hardness when applying a coating film. Therefore, the quantum dot dispersion according to the present invention can be effectively applied to various quantum dot application fields such as color filters and light conversion sheets to implement an image display device with excellent reliability.

Hereinafter, the present invention will be described in more detail.

One embodiment of the present invention relates to a quantum dot dispersion comprising a quantum dot (A), and a compound (B) having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group.

Quantum dots (A)

In one embodiment of the present invention, the quantum dots may refer to a nano-sized semiconductor material. Atoms form molecules, and molecules form aggregates of small molecules called clusters to form nanoparticles. When these nanoparticles have semiconductor properties, they are called quantum dots. When the quantum dot receives energy from the outside and reaches an excited state, the quantum dot emits energy according to its own corresponding energy bandgap.

In one embodiment of the present invention, the quantum dots may be non-cadmium-based quantum dots.

The non-cadmium-based quantum dot is not particularly limited as long as it is a quantum dot particle capable of emitting light by stimulation by light. 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.

Specifically, the group II-VI semiconductor compound may include a binary compound selected from the group consisting of ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, and mixtures thereof; ternary compound selected from the group consisting of ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, HgZnS, HgZnSe, HgZnTe, and mixtures thereof; and HgZnSeS, HgZnSeTe, HgZnSTe, and a quaternary compound selected from the group consisting of mixtures thereof, but is not limited thereto.

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. It is not limited.

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.

Although not limited thereto, the group IV element or a compound including the same may include an element selected from the group consisting of Si, Ge, and mixtures thereof; and SiC, SiGe, and mixtures thereof.

The quantum dots have a homogeneous single structure; dual structures such as core-shell, gradient structures, and the like; or a mixed structure thereof. Preferably, the quantum dots may have a core-shell structure including a core and a shell covering the core.

Specifically, in the double structure of the core-shell, the material constituting each core and the shell may be made of the different semiconductor compounds mentioned above. For example, the core may be GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP , InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb comprising at least one selected from the group consisting of , The shell may include one or more selected from the group consisting of ZnSe, ZnS and ZnTe, but is not limited thereto.

For example, core-shell structure quantum dots include InP/ZnS, InP/ZnSe, InP/GaP/ZnS, InP/ZnSe/ZnS, InP/ZnSeTe/ZnS, and InP/MnSe/ZnS.

The quantum dots may be synthesized by a wet chemical process, metal organic chemical vapor deposition (MOCVD), or molecular beam epitaxy (MBE), but is not limited thereto. , preferably synthesizing by a wet chemical process can obtain quantum dots with better optical properties.

The wet chemical process is a method of growing particles by adding a precursor material to an organic solvent. When the crystal is grown, the organic solvent is naturally coordinated on the surface of the quantum dot crystal and acts as a dispersant to control the growth of the crystal. Since the growth of particles can be controlled, it is preferable to use the wet chemical process to prepare the quantum dots.

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 may be replaced with another organic ligand by a ligand exchange method, if necessary.

The ligand exchange may be performed by adding an organic ligand to be exchanged to a dispersion containing the original organic ligand, that is, quantum dots having oleic acid, and stirring it at room temperature to 200° C. for 30 minutes to 3 hours. If necessary, a process of isolating and purifying the quantum dots on which the ligand exchange reaction has been completed may be additionally performed.

Examples of the other organic ligand include C ₅ to C ₂₀ alkyl carboxylic acid, C ₅ to C ₂₀ alkenyl carboxylic acid, C ₅ to C ₂₀ alkynyl carboxylic acid, thiol, phosphoric acid, pyridine. , mercapto alcohol, phosphine, phosphine oxide, and the like, but is not limited thereto.

The quantum dots (A) may be included in an amount of 5 to 80% by weight, preferably 10 to 70% by weight, based on 100% by weight of the total quantum dot dispersion. When the quantum dots are included within the above range, dispersion stability is excellent.

Compound (B) having a 3- to 6-membered sulfur-containing alicyclic hydrocarbon group

In one embodiment of the present invention, the compound (B) having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group is an additive for improving the light resistance of quantum dots and strengthening physical properties such as hardness when applying a coating film as a dispersion medium for quantum dots. plays a role

Specifically, the compound having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group may improve the light retention of quantum dots that may be affected by a blue light source. In addition, the compound having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group may improve physical properties such as hardness of the coating film when a coating film is formed by applying quantum dots to the curable composition.

Preferably, the compound having a 3- to 6-membered sulfur-containing alicyclic hydrocarbon group may include a compound represented by the following formula (1).

[Formula 1]

In the above formula,

또는

이고, Z is

or

ego,

R ¹ and R ² _{are each independently an absent or unsubstituted C 1} -C ₆ alkylene group in which at least one of the chain carbons is substituted with oxygen,

A is absent or is O, NR ⁴ or S,

R ³ and R ⁴ are each independently hydrogen or a C ₁ -C ₆ alkyl group,

n and m are each independently an integer of 1 to 4,

p is an integer from 1 to 100;

_{As used herein, the C 1} -C ₆ alkylene group in which at least one of the chain carbons is substituted with oxygen or unsubstituted is oxygen at least one of the chain carbons in a linear or branched divalent hydrocarbon having 1 to 6 carbon atoms. It refers to a functional group substituted or unsubstituted with, for example, methylene, ethylene, propylene, butylene, oxyethylene, and the like, but is not limited thereto.

As used herein, C ₁ -C ₆ Alkyl group refers to a linear or branched monovalent hydrocarbon having 1 to 6 carbon atoms, for example, methyl, ethyl, n-propyl, i-propyl, n-butyl , i-butyl, t-butyl, n-pentyl, n-hexyl, and the like.

In one embodiment of the present invention, n and m may be 1.

The compound (B) having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group may be included in an amount of 5 to 95% by weight, preferably 5 to 90% by weight, based on 100% by weight of the total quantum dot dispersion. When the compound having the 3 to 6 membered sulfur-containing alicyclic hydrocarbon group is included in an amount of less than 5% by weight based on 100% by weight of the total quantum dot dispersion, the dispersibility of the quantum dots may be reduced, and in an amount of more than 95% by weight When included, the dispersion properties of the dispersion are excellent, but color reproduction properties may be deteriorated due to leakage of excitation light when it is formed into a film.

The quantum dot dispersion according to an embodiment of the present invention may further include at least one of a curable monomer (C) and a solvent (D).

Curable monomer (C)

In one embodiment of the present invention, the curable monomer (C) has reactivity by the action of light or heat, and acts as a dispersion medium for quantum dots.

For example, as for the said curable monomer (C), a monofunctional monomer, a bifunctional monomer, another polyfunctional monomer, etc. are mentioned, Among these, a bifunctional monomer is used preferably.

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 Late, N-vinylpyrrolidone, 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, triethylene glycol di(meth)acrylate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, etc. are mentioned.

The type of the polyfunctional monomer is not particularly limited, and for example, trimethylolpropane tri(meth)acrylate, ethoxylated 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.

The curable monomer (C) may be included in an amount of 5 to 80% by weight, preferably 5 to 70% by weight, based on 100% by weight of the total quantum dot dispersion. When the curable monomer is included in an amount of less than 5% by weight based on 100% by weight of the total quantum dot dispersion, the dispersibility is lowered or the curing density of the coating film is lowered, so that problems such as wrinkles or cracks may occur when depositing a metal protective film, 80 When included in an amount exceeding the weight %, color reproduction characteristics may be deteriorated due to leakage of excitation light.

Solvent (D)

In one embodiment of the present invention, the solvent (D) may be an organic solvent commonly used in the art without any particular limitation.

For example, as the solvent, an ether or ester solvent, an aliphatic saturated hydrocarbon solvent, a halogenated hydrocarbon solvent, an aromatic hydrocarbon solvent, a ketone solvent, an alcohol solvent, or the like may be used.

Specifically, the ether or ester solvent is propylene glycol monomethyl ether acetate, propylene glycol monopropyl ether acetate, n-pentyl acetate, 3-methoxybutyl acetate, methoxybutyl acetate, methoxypentyl acetate, ethylene glycol mono Ethyl ether acetate, methyl cellosolve acetate, ethyl cellosolve acetate, 3-ethoxy ethyl propionate, 3-methoxymethyl propionate, γ-butyrolactone, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, ethylene glycol Monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, etc. are mentioned.

Examples of the aliphatic saturated hydrocarbon solvent include hexane, pentane, heptane, cyclopentane, cyclohexane, and kerosene.

Examples of the halogenated hydrocarbon solvent include chloroform, dichloromethane, carbon tetrachloride, dichloroethane, and tetrachloroethane.

Examples of the aromatic hydrocarbon-based solvent include benzene, toluene, xylene, mesitylene, and dichlorobenzene.

Examples of the ketone-based solvent include methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone.

Examples of the alcohol-based solvent include ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin.

These solvents may be used alone or in combination of two or more.

The solvent (D) may be included in an amount of 20 to 90% by weight, preferably 25 to 85% by weight, based on 100% by weight of the total quantum dot dispersion. When the solvent is included within the above range, precipitation of particles in the quantum dot dispersion can be suppressed, and dispersion stability and optical properties are excellent, which is advantageous in terms of storage stability of the dispersion.

<Curable composition>

One embodiment of the present invention relates to a curable composition comprising the quantum dot dispersion described above.

For example, the curable composition may be a light conversion ink composition, a light conversion resin composition, or a self-luminous photosensitive resin composition.

In one embodiment of the present invention, the light conversion ink composition may further include a photopolymerizable monomer and a photopolymerization initiator in addition to the quantum dot dispersion.

The photopolymerizable monomer may be the same as the curable monomer used in the quantum dot dispersion described above, as long as it is a compound that can be polymerized by the action of light and a photopolymerization initiator to be described later.

The photopolymerizable monomer may be included in an amount of 20 to 90% by weight, preferably 30 to 80% by weight, based on 100% by weight of the total weight of the light conversion ink composition. When the photopolymerizable monomer is included within the above range, there is a desirable advantage in terms of strength or smoothness of the pixel portion. When the photopolymerizable monomer is included in less than the above range, the intensity of the pixel portion may be slightly lowered, and when the photopolymerizable monomer is included in excess of the above range, smoothness may be slightly reduced, so it is preferable to be included within the above range. .

The photopolymerization initiator may be used without any particular limitation as long as it can polymerize the photopolymerizable monomer. In particular, the photopolymerization initiator is an acetophenone-based compound, a benzophenone-based compound, a triazine-based compound, a biimidazole-based compound, an oxime-based compound, and thioxic acid in terms of polymerization characteristics, initiation efficiency, absorption wavelength, availability, price, etc. It is preferable to use at least one compound selected from the group consisting of ton-based compounds.

The photopolymerization initiator may be included in an amount of 0.01 to 20% by weight, preferably 0.5 to 15% by weight, based on 100% by weight of the total light conversion ink composition. When the photopolymerization initiator is included in the above range, it is preferable because the photoconversion ink composition is highly sensitive and the exposure time is shortened, so that productivity can be improved. In addition, there is an advantage in that the strength of the pixel portion formed by using the photoconversion ink composition according to the present invention and smoothness on the surface of the pixel portion are improved.

The photopolymerization initiator may further include a photopolymerization initiation aid to improve the sensitivity of the photoconversion ink composition according to the present invention. When the photopolymerization initiation adjuvant is included, sensitivity is further increased, and thus productivity is improved.

The photopolymerization initiation adjuvant may be, for example, at least one compound selected from the group consisting of an amine compound, a carboxylic acid compound, and an organic sulfur compound having a thiol group, but is not limited thereto.

The said photoinitiation adjuvant can be added and used suitably in the range which does not impair the effect of this invention.

In one embodiment of the present invention, the light conversion ink composition may further include scattering particles.

The scattering particles serve to increase the overall light efficiency by increasing the path of light emitted from the quantum dots.

As the scattering particles, a conventional inorganic material may be used, and a metal oxide may be preferably used.

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 at least one 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.

The scattering particles may have an average particle diameter of 50 to 1000 nm, preferably in the range of 100 to 500 nm, more preferably in the range of 150 to 300 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. Adjust and use.

In the present invention, the average particle diameter may be a number average particle diameter, and for example, it can be obtained from an image observed by a field emission scanning electron microscope (FE-SEM) or a transmission electron microscope (TEM). Specifically, it is possible to obtain a value obtained by extracting several samples from an observation image of FE-SEM or TEM, measuring the diameters of these samples, and arithmetic average.

The scattering particles may be included in an amount of 0.5 to 20% by weight, preferably 1 to 15% by weight, based on 100% by weight of the total weight of the light conversion ink composition. When the scattering particles are included within the above range, the effect of increasing the luminescence intensity can be maximized, and it is preferable. The transmittance of the irradiated light may be lowered, which may cause a problem in luminous efficiency.

The light conversion ink composition according to an embodiment of the present invention may further include additives such as a surfactant and an adhesion promoter in order to improve the flatness or adhesion of the coating film, in addition to the above-described components.

The light conversion ink composition according to an embodiment of the present invention may be a solvent type or a non-solvent type, and may preferably be a non-solvent type in view of continuous processability.

When the light conversion ink composition is a solvent type, the same solvent as described for the above-described quantum dot dispersion may be used.

In one embodiment of the present invention, the light conversion resin composition further comprises a curable resin in addition to the quantum dot dispersion.

The curable resin serves as a dispersion medium for quantum dots and a binder resin.

As the curable resin, a transparent polymer that transmits light may be used, and in particular, a resin having low moisture permeability and low air permeability in terms of preventing quantum dot degradation may be used.

For example, the curable resin may include an epoxy resin, an acrylic resin, an epoxy acrylate resin, polyvinyl acetate, polyvinyl alcohol, polyethylene, polypropylene, polycarbonate, polyvinyl chloride, etc. alone or two or more kinds, particularly It may include an epoxy resin.

The polystyrene equivalent weight average molecular weight (hereinafter simply referred to as 'weight average molecular weight') measured by gel permeation chromatography (GPC; using tetrahydrofuran as the elution solvent) of the curable resin is 5000 g/mol to 50000 g/mol , preferably 8000 g/mol to 40000 g/mol. When the weight average molecular weight is in the above range, there is an advantage in that the hardness of the coating film is increased, which is preferable.

The curable resin may be included in an amount of 5 to 60% by weight, preferably 10 to 50% by weight, based on 100% by weight of the total solid content of the light conversion resin composition. When the curable resin is included in an amount of less than 5% by weight, it may be difficult to obtain a cured film of a thick film in the process, and when it is included in an amount of more than 60% by weight, it may be difficult to form a cured film of a uniform thickness.

In an embodiment of the present invention, the light conversion resin composition may further include scattering particles, a solvent, a dispersant and/or a curing agent.

The scattering particles may be the same as those used in the above-described light conversion ink composition.

The scattering particles may be included in an amount of 0.5 to 30% by weight based on 100% by weight of the total solid content in the light conversion resin composition. When the scattering particles are included in an amount of less than 0.5% by weight, the effect of light scattering may be too low to give an appropriate light output that can be used in the coating film, and when included in an amount of more than 30% by weight, the effect of scattering is too strong The light output may be lowered because the emitted light does not pass through and cannot escape the coating film.

As the solvent, the same solvent as described for the quantum dot dispersion may be used.

The dispersant provides a deagglomeration effect of quantum dots. As the dispersing agent, a compound containing a carboxylic acid and an unsaturated double bond may be used.

As the curing agent, an epoxy compound, a polyfunctional isocyanate compound, an oxetane compound, or the like may be used.

The light conversion resin composition according to the present invention may further include additives such as surfactants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-aggregation agents, if necessary.

In one embodiment of the present invention, the self-luminous photosensitive resin composition further includes an alkali-soluble resin, a photopolymerizable monomer, and a photopolymerization initiator in addition to the quantum dot dispersion.

The alkali-soluble resin may serve to make the non-exposed portion of the pattern prepared from the self-luminous photosensitive resin composition alkali-soluble to remove it, and to leave the exposed region. In addition, when the self-luminous photosensitive resin composition includes the alkali-soluble resin, the quantum dots may be evenly dispersed in the composition, and may serve to protect the quantum dots during the process to maintain luminance.

The alkali-soluble resin may be used by selecting one having an acid value of 50 to 200 (KOHmg/g). The "acid value" is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of the polymer and is involved in solubility. When the acid value of the alkali-soluble resin is less than the above range, it may be difficult to secure a sufficient development speed. There may be problems with the rise.

In addition, the alkali-soluble resin may have a weight average molecular weight of 3,000 to 30,000, preferably 5,000 to 20,000, and a molecular weight distribution of 1.5 to 6.0, preferably 1.8 to 4.0.

The alkali-soluble resin may be a polymer of a carboxyl group-containing unsaturated monomer, a copolymer with a monomer having an unsaturated bond copolymerizable therewith, or a combination thereof.

Examples of the carboxyl group-containing unsaturated monomer include unsaturated monocarboxylic acid, unsaturated dicarboxylic acid, and unsaturated tricarboxylic acid. Specific examples of the unsaturated monocarboxylic acid include acrylic acid, methacrylic acid, crotonic acid, α-chloroacrylic acid, and cinnamic acid. Examples of the unsaturated dicarboxylic acid include maleic acid, fumaric acid, itaconic acid, citraconic acid, and mesaconic acid. The unsaturated dicarboxylic acid may be an acid anhydride, and specific examples thereof include maleic anhydride, itaconic anhydride, and citraconic anhydride. In addition, the unsaturated dicarboxylic acid may be its mono(2-(meth)acryloyloxyalkyl)ester, for example, succinic acid mono(2-acryloyloxyethyl), succinic acid mono(2-methacryloyloxy) ethyl), monophthalic acid mono(2-acryloyloxyethyl), phthalic acid mono(2-methacryloyloxyethyl), etc. are mentioned. The unsaturated dicarboxylic acid may be a mono(meth)acrylate of the dicarboxy polymer at both terminals, and examples thereof include ω-carboxypolycaprolactone monoacrylate and ω-carboxypolycaprolactone monomethacrylate. These carboxyl group-containing monomers can be used individually or in mixture of 2 or more types, respectively.

In addition, the monomer copolymerizable with the carboxyl group-containing unsaturated monomer is an aromatic vinyl compound, an unsaturated carboxylic acid ester compound, an unsaturated carboxylic acid aminoalkyl ester compound, an unsaturated carboxylic acid glycidyl ester compound, a carboxylic acid vinyl ester compound, an unsaturated ether compound, a vinyl cyanide compound, an unsaturated At least one selected from the group consisting of amide compounds, unsaturated imide compounds, aliphatic conjugated diene compounds, macromonomers having monoacryloyl or monomethacryloyl groups at the ends of molecular chains, bulky monomers, and combinations thereof is possible do.

The alkali-soluble resin may be included in an amount of 5 to 80% by weight, specifically 10 to 70% by weight, more specifically 15 to 60% by weight based on 100% by weight of the total solid content of the self-luminous photosensitive resin composition.

The photopolymerizable monomer may be the same as the curable monomer used in the quantum dot dispersion described above, as long as it is a compound that can be polymerized by the action of light and a photopolymerization initiator to be described later.

The photopolymerizable monomer may be included in an amount of 5 to 70 wt%, specifically 10 to 60 wt%, more specifically 15 to 50 wt%, based on 100 wt% of the total solid content of the self-luminous photosensitive resin composition.

The photopolymerization initiator may be the same as that used in the above-described photoconversion ink composition, and may further include a photopolymerization initiation aid if necessary.

The photopolymerization initiator may be included in an amount of 0.1 to 20% by weight, preferably 0.5 to 15% by weight, more preferably 1 to 10% by weight based on 100% by weight of the total solid content of the self-luminous photosensitive resin composition.

The self-luminous photosensitive resin composition may further include a solvent, and the same solvent as described for the quantum dot dispersion may be used as the solvent.

The solvent content in the self-luminous photosensitive resin composition may be included in an amount of 20 to 90 wt%, preferably 25 to 85 wt%, more preferably 30 to 80 wt%, based on 100 wt% of the total self-luminescence photosensitive resin composition. .

The self-luminous photosensitive resin composition according to the present invention may further include additives such as adhesion promoters, surfactants, antioxidants, ultraviolet absorbers, and aggregation inhibitors, if necessary.

<Cured film>

One embodiment of the present invention relates to a cured film formed using the above-described curable composition.

In one embodiment of the present invention, the cured film may be a color filter or a light conversion sheet.

Since the color filter and the light conversion sheet according to the present invention include a cured product of the curable composition including the quantum dot dispersion of the present invention, the light resistance of the quantum dots is excellent and the coating film hardness is excellent.

The color filter includes a substrate and a pattern layer formed on the substrate.

The substrate may be a substrate of the color filter itself, or may be a portion in which a color filter is positioned on a display device, and the like, and is not particularly limited. The substrate may be glass, silicon (Si), silicon oxide (SiO _x ), Al, GaAs or a polymer substrate, wherein the polymer is polyethersulfone, polycarbonate, polyester, aromatic polyamide, polyamideimide, polyimide etc. The substrate may have a barrier rib matrix formed thereon.

The pattern layer is a layer including the curable composition of the present invention, and may be patterned by an inkjet printing patterning method or patterned by photolithography.

The pattern forming method using the inkjet printing patterning method may be performed by applying the above-described curable composition to a predetermined area by an inkjet method and curing the applied curable composition.

First, the curable composition of the present invention is injected into an inkjet injector and printed on a predetermined area of the substrate.

In order to form an appropriate phase on a substrate by being ejected from a piezo inkjet head, which is an example of an inkjet injector, properties such as viscosity, fluidity, and quantum dot particles must be balanced with the inkjet head. The piezo inkjet head used in the present invention is not limited, but ejects ink having a droplet size of about 10 to 100 pL, preferably about 20 to 40 pL.

When using the inkjet printing patterning method, the viscosity of the curable composition of the present invention is suitably about 3 to 30 cP, and more preferably, it is adjusted in the range of 7 to 20 cP.

The pattern forming method using the photolithography method may be performed by applying the above-described curable composition and exposing, developing, and thermally curing the composition in a predetermined pattern. The pattern forming method using the photolithography method may be formed by performing a method commonly known in the art.

The color filter may include only two color pattern layers among a red pattern layer, a green pattern layer, and a blue pattern layer, but is not limited thereto. However, when the color filter has only two color pattern layers, the pattern layer may further include a transparent pattern layer that does not contain the quantum dot particles.

When the color filter includes only the pattern layer of the two types of colors, a light source emitting light of a wavelength representing a color other than the two types of colors may be used. For example, when the color filter includes a red pattern layer and a green pattern layer, a light source emitting blue light may be used. In this case, the red quantum dots emit red light and the green quantum dots emit green light, and the transparent pattern layer is As blue light from the light source is transmitted as it is, it may appear blue.

The light conversion sheet is a sheet that converts the wavelength of light emitted by the light emitting device and emits the light.

The light conversion sheet may further include a substrate.

The light conversion sheet may be formed by applying the above-described curable composition on a substrate, drying and curing the composition.

The substrate may be release-treated if necessary.

As the substrate, glass or polyethylene terephthalate (PET) film may be used.

The curing may be performed under thermal curing or photocuring conditions.

<Image display device>

One embodiment of the present invention relates to an image display device including the cured film described above.

In the image display device according to an embodiment of the present invention, the above-described cured film may be applied as a color filter or a light conversion sheet, and thus may be used to manufacture a color filter substrate or a light source of a backlight unit.

The cured film of the present invention is not only a general liquid crystal display device (LCD), but also an electroluminescence display device (EL), a plasma display device (PDP), a field emission display device (FED), an organic light emitting device (OLED), a quantum dot light emitting diode ( It can be applied to various image display devices such as Quantum Dot Light-Emitting Diode, QLED).

The image display device of the present invention includes a configuration known in the art, except for having the cured film described above.

In addition, the quantum dot according to an embodiment of the present invention can be applied not only to the display described above, but also as a material for lighting, a light source, a solar cell, a semiconductor laser/optical amplifier, and bio-imaging.

Hereinafter, the present invention will be described in more detail by way of Examples, Comparative Examples and Experimental Examples. These Examples, Comparative Examples, and Experimental Examples are only for illustrating the present invention, and it is apparent to those skilled in the art that the scope of the present invention is not limited thereto.

Synthesis Example 1: Quantum Dot (A-1) Synthesis

0.05839 g of indium acetate, 0.12019 g of oleic acid, and 10 mL of 1-octadecene (ODE) were placed in a 3-neck flask. The flask was subjected to a degassing process for 30 minutes at 110° C. under 100 mTorr while stirring, and then heated to a temperature of 270° C. under an inert gas until the solution became transparent.

As a phosphorus (P) precursor, 0.025054 g of tris (trimethylsilyl) phosphine was prepared, put into 0.5 mL of 1-octadecene and 0.5 mL of tri-n-octylphosphine, stirred, and the flask was heated to 270° C. under inert gas. was quickly injected into After reacting for 1 hour, the reaction was terminated by rapid cooling. Then, when the temperature of the flask reached 100 °C, 10 mL of toluene was injected and transferred to a 50 mL centrifuge tube. After adding 10 mL of ethanol, it was purified twice using a precipitation and redispersion method. The purified InP core nanoparticles were dispersed in 1-octadecene and then stored.

3.669 g of zinc acetate, 20 mL of oleic acid, and 20 mL of 1-octadecene were put in a three-necked flask, and after degassing for 30 minutes at 110 °C and 100 mTorr while stirring, inert gas until the solution became transparent After heating to a temperature of 270°C under

Add 0.6412 g of sulfur and 10 mL of tri-n-octylphosphine to a three-necked flask, heat to 80 °C while stirring in an inert gas atmosphere until the solution becomes transparent, and then cool to room temperature to obtain TOP:S-form S precursor solution got

In a separate three-necked flask, the prepared InP core nanoparticle solution was put, the temperature of the flask was adjusted to 300 °C, and 0.6 mL of the zinc precursor solution prepared in advance was quickly injected using a syringe. Thereafter, 0.3 mL of the S precursor solution prepared in advance was injected into the flask at a rate of 2 mL/hr using a syringe pump. After the injection was completed, the reaction was further carried out for 3 hours, and the reaction was terminated by rapid cooling. When the temperature of the flask reached 100° C., 10 mL of toluene was injected, and then transferred to a 50 mL centrifuge tube. After adding 10 mL of ethanol, it was purified twice using a precipitation and redispersion method. The purified InP/ZnS core-shell structure nanoparticles were dispersed in n-chloroform and then stored. The solid content was adjusted to 25%. The maximum emission wavelength was 525 nm.

Synthesis Example 2: Quantum Dot (A-2) Synthesis

0.4 mmol (0.058 g) of indium acetate (0.058 g), 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 (TMS 3} P) and 1.0 mL of trioctylphosphine was quickly 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 25%. The maximum emission wavelength was 520 nm.

Examples and Comparative Examples: Preparation of quantum dot dispersion

A quantum dot dispersion was prepared by mixing each component with the composition of Table 1 below (% by weight).

quantum dots A compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group curable monomer solvent A-1 A-2 B-1 B-2 B-3 C-1 C-2 D-1 D-2 D-3 Example 1 40 60 Example 2 40 60 Example 3 40 60 Example 4 40 60 Example 5 40 60 Example 6 40 60 Example 7 50 5 45 Example 8 50 25 25 Example 9 50 45 5 Example 10 50 25 25 Example 11 40 5 55 Example 12 40 25 35 Example 13 40 10 50 Example 14 40 15 45 Example 15 40 30 30 Comparative Example 1 40 60 Comparative Example 2 40 60 Comparative Example 3 40 60 Comparative Example 4 40 60

A-1: Quantum dot powder prepared in Synthesis Example 1

A-2: Quantum dot powder prepared in Synthesis Example 2

이고, R¹은

이며, R²는

이고, n은 1이고, m은 1인 화학식 1로 표시되는 화합물B-1: Z is

and R ¹ is

and R ² is

, n is 1, and m is 1, a compound represented by Formula 1

이고, R¹은

이며, R²는

이고, n은 1이고, m은 1인 화학식 1로 표시되는 화합물B-2: Z is

and R ¹ is

and R ² is

, n is 1, and m is 1, a compound represented by Formula 1

이고, R¹은

이며, R²는

이고, n은 1이고, m은 1인 화학식 1로 표시되는 화합물B-3: Z is

and R ¹ is

and R ² is

, n is 1, and m is 1, a compound represented by Formula 1

C-1: BDDA (1,4-Butanediol diacrylate)

C-2: PETA (Pentaerithritol triacrylate)

D-1: propylene glycol monomethyl ether acetate

D-2: n-pentyl acetate

D-3: 3-methoxybutyl acetate

Examples and Comparative Examples: Preparation of Light Conversion Ink Compositions

A light conversion ink composition was prepared by mixing each component in the composition of Tables 2 and 3 below (wt%).

Composition (wt%) Example 16 Example 17 Example 18 Example 19 Example 20 Example 21 Example 22 Example 23 Example 24 Example 25 Example 26 Example 27 Example 28 Example 29 Example 30 quantum dot dispersion Example 1 50 - - - - - - - - - - - - - - Example 2 - 50 - - - - - - - - - - - - - Example 3 - - 50 - - - - - - - - - - - - Example 4 - - - 20 - - - - - - - - - - - Example 5 - - - - 50 - - - - - - - - - - Example 6 - - - - - 50 - - - - - - - - - Example 7 - - - - - - 50 - - - - - - - - Example 8 - - - - - - - 50 - - - - - - - Example 9 - - - - - - - - 40 - - - - - - Example 10 - - - - - - - - - 50 - - - - - Example 11 50 - - - - Example 12 - 50 - - - Example 13 - - 50 - - Example 14 - - - 50 - Example 15 - - - - 50 photopolymerization
monomer MN-1 43 - 43 - 43 43 43 - 53 - 43 - 43 - 43 MN-2 - 43 - 73 - - - 43 - 43 - 43 - 43 - scattering particles 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 photopolymerization initiator PI-1 One One One One One One One One One One One One One One One

Composition (wt%) Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 quantum dot dispersion Comparative Example 1 50 - 40 - - Comparative Example 2 - 30 - - - Comparative Example 3 50 - Comparative Example 4 - 50 photopolymerization
monomer MN-1 43 63 - 43 - MN-2 - - 53 - 43 scattering particles 6 6 6 6 6 photopolymerization initiator PI-1 One One One One One

MN-1: 1,6-hexanediol diacrylate

MN-2: pentaerythritol triacrylate

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

PI-1: 4,4'-di(N,N'-dimethylamino)-benzophenone (manufactured by Hodogaya Chemical Co., Ltd.)

Experimental Example 1:

The viscosity stability, dispersion particle size and light resistance of the quantum dot dispersions prepared in Examples and Comparative Examples were measured in the following manner, and the results are shown in Table 4 below.

(1) Viscosity stability

For the quantum dot dispersions of Examples 1 to 15 and Comparative Examples 1 to 4, an R-type viscometer (VISCOMETER MODEL RE120L SYSTEM, manufactured by Toki Sangyo Co., Ltd.) was used at a rotation speed of 10 rpm and a temperature of 30 ° C. The viscosity was measured after storage for 1 month at the initial viscosity and at a low temperature of 5°C. Viscosity stability was evaluated by the rate of change of viscosity according to the following evaluation criteria.

<Evaluation criteria>

○: Viscosity change rate 105% or less

△: Viscosity change rate greater than 105% to 110% or less

×: Viscosity change rate exceeding 110%

(2) Dispersion particle size

The dispersed particle sizes of the quantum dot dispersions of Examples 1 to 15 and Comparative Examples 1 to 4 were measured using ELSZ-2000ZS (manufactured by Otsuka Corporation).

(3) Light resistance (light retention rate)

The quantum efficiency (QY%) at the beginning of the quantum dot dispersion preparation and the quantum efficiency (QY%) after 15 days at room temperature were measured using a PL spectrophotometer and a UV-Vis spectrophotometer.

When the surface of the quantum dot is oxidized, the quantum efficiency is reduced, so the light resistance (light retention) can be confirmed by measuring the decrease in the quantum efficiency. That is, light resistance can be confirmed by measuring ΔQY%.

Viscosity Stability dispersed particle size Light fastness (light retention) Initial QY (%) QY (%) after 15 days Δ QY (%) Example 1 ○ 5.8 82 75 7 Example 2 ○ 6.2 80 71 9 Example 3 ○ 5.9 88 87 One Example 4 ○ 7.2 87 85 2 Example 5 ○ 6.5 89 84 5 Example 6 ○ 6.8 86 84 2 Example 7 ○ 5.5 90 84 6 Example 8 ○ 6.4 89 82 7 Example 9 ○ 6.5 87 80 7 Example 10 ○ 7.6 84 79 5 Example 11 ○ 6.8 82 74 8 Example 12 ○ 7.2 80 70 10 Example 13 ○ 6.9 88 81 7 Example 14 ○ 7.7 87 82 5 Example 15 ○ 7.5 89 79 10 Comparative Example 1 △ 42 86 32 54 Comparative Example 2 × 48 88 45 43 Comparative Example 3 △ 32 82 40 42 Comparative Example 4 △ 21 86 52 34

As shown in Table 4, the quantum dot dispersion of the embodiment comprising a compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group is a quantum dot of Comparative Example that does not include a compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group It was confirmed that viscosity stability, dispersed particle size and light resistance were significantly improved compared to the dispersion.

Experimental Example 2:

The light conversion coating layer was prepared as follows by using the light conversion ink composition prepared in Examples and Comparative Examples, and the light conversion efficiency, light resistance (light retention), the number of continuous jetting and the coating film hardness were measured in the following way. and the results are shown in Table 5 below.

<Production of light conversion coating layer>

Each of the photoconversion ink compositions prepared in Examples and Comparative Examples was applied on a 5cm×5cm glass substrate by an inkjet method, and then 100mJ/cm2 using a 1kW high-pressure mercury lamp containing all g, h, and i lines as an ultraviolet light source. After irradiation with a furnace, it was heated in a heating oven at 180° C. for 30 minutes to prepare a light conversion coating layer.

(1) light conversion efficiency

After placing the prepared light conversion coating layer on top of a blue light source (XLamp XR-E LED, Royal blue 450, Cree Corporation), the light conversion efficiency was calculated using a luminance meter (CAS140CT Spectrometer, Instrument systems) using the following math It was measured using Equation 1.

The higher the light conversion efficiency (%), the better the luminance can be obtained.

[Equation 1]

(2) Light resistance (light retention rate)

After placing the prepared light conversion coating layer on top of a blue light source (XLamp XR-E LED, Royal blue 450, Cree), the initial light conversion efficiency was calculated using a luminance meter (CAS140CT Spectrometer, Instrument systems). It was calculated by Equation 1. Thereafter, the light conversion coating layer was irradiated with a 450 nm LED of 80 mW/cm 2 illuminance for 3 days, and then the light conversion efficiency was measured as described above to calculate the light retention rate using Equation 2 below.

[Equation 2]

(3) Number of continuous jetting

After filling the photoconversion ink compositions of Examples 16 to 30 and Comparative Examples 5 to 9 in Unijet's inkjet printing equipment, the temperature of the jetting head was fixed at 40° C., and the ink was discharged for 1 minute and left for 30 minutes. Nozzle clogging of the jetting head. The number of continuous jetting was evaluated by repeating until no discharge was performed.

As the number of continuous jetting increases, excellent properties can be obtained in the continuous process.

(4) film hardness

The hardness of the prepared light conversion coating layer was measured at a high temperature of 150° C. using a hardness meter (HM500; manufactured by Fischer), and the surface hardness was evaluated according to the following evaluation criteria.

<Evaluation criteria>

○: surface hardness of 50 N/㎟ or more

△: surface hardness of 30 N/mm2 or more and less than 50 N/mm2

×: surface hardness less than 30 N/㎟

Light Conversion Efficiency (%) Light fastness (light retention) Number of consecutive jets film hardness Example 16 35.2% 92% more than 5 ○ Example 17 34.2% 96% more than 5 ○ Example 18 34.8% 90% more than 5 ○ Example 19 35.2% 89% more than 5 ○ Example 20 35.6% 93% more than 5 ○ Example 21 36.2% 92% more than 5 ○ Example 22 34.2% 95% more than 5 ○ Example 23 35.2% 90% more than 5 ○ Example 24 35.5% 89% more than 5 ○ Example 25 34.2% 87% more than 5 ○ Example 26 36.0% 88% more than 5 ○ Example 27 35.1% 96% more than 5 ○ Example 28 37.0% 98% more than 5 ○ Example 29 34.5% 94% more than 5 ○ Example 30 33.6% 99% more than 5 ○ Comparative Example 5 24.2% 61% 3rd time △ Comparative Example 6 23.2% 54% 4 times △ Comparative Example 7 25.2% 70% 1 time △ Comparative Example 8 28.6% 63% 3rd time × Comparative Example 9 24.1% 78% Episode 2 ×

As shown in Table 5, the light conversion ink composition of an embodiment using a quantum dot dispersion comprising a compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group is a compound having a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group. It was confirmed that the light conversion efficiency, light resistance (light retention), the number of continuous jetting and the coating film hardness were more excellent than the light conversion ink composition of Comparative Example using the quantum dot dispersion not containing it.

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 (9)

A quantum dot dispersion comprising a compound having a quantum dot, and a 3 to 6 membered sulfur-containing alicyclic hydrocarbon group. According to claim 1, wherein the compound having a sulfur-containing alicyclic hydrocarbon group of 3 to 6 members is a quantum dot dispersion comprising a compound represented by the following formula (1):
[Formula 1]

In the above formula,
Z is

or

ego,
R ¹ and R ² _{are each independently an absent or unsubstituted C 1} -C ₆ alkylene group in which at least one of the chain carbons is substituted with oxygen,
A is absent or is O, NR ⁴ or S,
R ³ and R ⁴ are each independently hydrogen or a C ₁ -C ₆ alkyl group,
n and m are each independently an integer of 1 to 4,
p is an integer from 1 to 100; The quantum dot dispersion according to claim 2, wherein n and m are 1. The quantum dot dispersion according to claim 1, further comprising at least one of a curable monomer and a solvent. A curable composition comprising the quantum dot dispersion according to any one of claims 1 to 4. The curable composition of claim 5, wherein the curable composition is a light conversion ink composition, a light conversion resin composition, or a self-luminous photosensitive resin composition. A cured film formed using the curable composition according to claim 5. The cured film according to claim 7, wherein the cured film is a color filter or a light conversion sheet. An image display device comprising the cured film according to claim 7.