KR20200111515A - Curable composition including quantum dot, curable layer using the same, display device including curable layer and manufacturing method of curable layer - Google Patents

Abstract

The present invention relates to a curable composition comprising: (A) quantum dots; (B) a binder resin; (C) a curable monomer including a first curable monomer and a second curable monomer; and (D) a solvent, wherein the first curable monomer is a phosphate-based monomer, and the second curable monomer includes at least one curable monomer having a structure different from the phosphate-based monomer, to a cured film manufactured using the curable composition, to a display device including the cured film, and to a manufacturing method of a cured film using the curable composition. In addition, the curable composition can prevent deterioration of optical properties.

Description

Curable composition containing quantum dots, a cured film using the same, a display device including the cured film, and a method for manufacturing the cured film {CURABLE COMPOSITION INCLUDING QUANTUM DOT, CURABLE LAYER USING THE SAME, DISPLAY DEVICE INCLUDING CURABLE LAYER AND MANUFACTURING METHOD OF CURABLE LAYER}

The present disclosure relates to a curable composition containing quantum dots, a cured film using the same, a display device including the cured film, and a method of manufacturing a cured film using the curable composition containing the quantum dots.

Color filters are used in liquid crystal displays, optical filters of cameras, and the like, and are manufactured by coating fine areas colored with three or more colors on a solid-state imaging device or a transparent substrate. Such a colored thin film may be formed by a conventional dyeing method, a printing method, a pigment dispersion method, an inkjet method, or the like.

In the dyeing method, an image with a dyeing base such as a natural photosensitive resin such as gelatin, an amine-modified polyvinyl alcohol, or an amine-modified acrylic resin is formed on a substrate in advance, and then dyed with a dye such as direct dye to form a colored thin film. In the case of the dyeing method, the clarity and dispersibility of commonly used dyes and resins are good, but there are disadvantages in that light resistance, moisture resistance and heat resistance are poor.

In the printing method, a colored thin film is formed by performing printing using an ink in which a pigment is dispersed in a thermosetting or photocurable resin, and then curing with heat or light. The dyeing method can reduce material cost compared to other methods, but has a disadvantage in that it is difficult to form highly precise and detailed images.

The pigment dispersion method is a method of forming a colored thin film by repeating a series of processes of coating, exposing, developing and thermosetting a photopolymerizable composition containing a colorant on a transparent substrate provided with a black matrix. The pigment dispersion method has the advantage of improving heat resistance and durability and maintaining a uniform thickness of the film. In addition, the implementation of the fine pattern is excellent and the manufacturing method is relatively easy, so it is widely adopted. For example, in Korean Patent Publication No. 1992-7002502, Korean Patent Publication No. 1994-0005617, Korean Patent Publication No. 1995-0011163, and Korean Patent Publication No. 1995-7000359, the preparation of a colored photosensitive resin composition using a pigment dispersion method. A method is being proposed.

However, the above method requires a process of coating, exposure, developing, and curing respectively for red (R), green (G) and blue (B) to form a pixel, so that the manufacturing process is very long and the control factor between processes is As it increases, it is difficult to manage the yield.

In order to overcome this problem, in recent years, various new process methods have been used to replace the conventional pigment dispersion method, and a representative one is the inkjet printing method. In the inkjet printing method, a light blocking layer such as a black matrix is formed on a glass substrate and ink is injected into the pixel space. In the inkjet printing method, since separate processes such as coating, exposure, and development are unnecessary in manufacturing a color filter, materials required for the process can be reduced and the process can be simplified.

In the case of manufacturing a color filter using the above inkjet ink, it is common to mix and use two or more types of pigments in order to secure required color characteristics. In particular, in a red filter, a dichitopyrrolopyrrole-based red pigment, for example, C.I. Pigment Red 254 is mainly used. In addition, as a toning pigment, an anthraquinone-based red pigment, for example, C.I. Pigment Red 177 is added, or isoindolinone-based yellow pigments, for example C.I. It is common to add Pigment Yellow 139. In some cases, other yellow and orange pigments, for example C.I. Pigment Yellow 138, C.I Pigment Yellow 150, C.I. Pigment Orange 38 or the like may be added. The pigments have excellent color characteristics, light resistance, and heat resistance, and have been commonly used as materials for color filters. However, as the use of LCD color filters is expanded in recent years, the required level of physical properties is increasing day by day. Therefore, in order to increase color characteristics such as improved brightness and color purity when transmitted, studies to atomize and finely disperse the pigments are being conducted, but in fact, there is a limit to the expression of color characteristics of a color filter only with a combination of these pigments.

One embodiment is to provide an inkjet curable composition having a viscosity at a level capable of inkjetting at room temperature while maintaining optical properties.

Another embodiment is to provide a cured film using the curable composition.

Another embodiment is to provide a display device including the cured film.

Another embodiment is to provide a cured film manufacturing method using the curable composition.

The curable composition according to one embodiment includes (A) quantum dots; (B) binder resin; (C) a curable monomer comprising a first curable monomer and a second curable monomer; And (D) a solvent, wherein the first curable monomer is a phosphate-based monomer, and the second curable monomer includes at least one curable monomer having a structure different from that of the phosphate-based monomer.

The phosphate-based monomer may be represented by Formula 1 below.

[Formula 1]

In Formula 1,

R ¹ and R ² are each independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group,

R ³ is a monovalent organic group containing a carbon-carbon double bond,

L ¹ is a substituted or unsubstituted C1 to C20 alkylene group or a substituted or unsubstituted C6 to C20 arylene group.

The monovalent organic group including the carbon-carbon double bond may be represented by the following formula (2).

[Formula 2]

In Chemical Formula 2,

R ⁴ is a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group.

The first curable monomer may be included in an amount of 20% to 80% by weight based on the total amount of the binder resin and the first curable monomer.

The first curable monomer may be included in an amount of 1% to 30% by weight based on the total amount of the curable composition.

The second curable monomer may include an oxetane-based monomer, an acrylate-based monomer, a thiol-based monomer, or a combination thereof.

The curable composition may have a viscosity of 1 cps to 15 cps at 25°C.

The binder resin may include an acrylic resin, an epoxy resin, or a combination thereof.

The quantum dots may have a maximum fluorescence emission wavelength in 500 nm to 680 nm.

The curable composition may further include a diffusion agent.

The diffusion agent may be included in an amount of 0.1% to 20% by weight based on the total amount of the curable composition.

The diffusion agent may include barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.

The curable composition may include 1 wt% to 40 wt% of the quantum dots, 1 wt% to 30 wt% of the binder resin, 1 wt% to 30 wt% of the curable monomer, and the balance of the solvent based on the total amount of the curable composition.

The curable composition is a thiol-based additive; Polymerization inhibitors; Malonic acid; 3-amino-1,2-propanediol; Silane-based coupling agents; Leveling agents; Fluorine-based surfactant; Or it may further include a combination thereof.

Another embodiment provides a cured film prepared by using the curable composition.

Another embodiment provides a display device including the cured film.

Another embodiment is the step of forming a pattern by applying the curable composition on a substrate by an ink jet spraying method; And it provides a cured film manufacturing method comprising the step of curing the pattern.

Other specifics of aspects of the present invention are included in the detailed description below.

One embodiment is a curable composition suitable for an inkjet printing method that does not require processes such as exposure and development, wherein the curable composition includes a mixture of a phosphate-based monomer and another monomer having a structure different from the phosphate-based monomer as a curable monomer, It is possible to reduce the viscosity of the composition to a level capable of ink jetting at room temperature while preventing deterioration of optical properties.

1 and 2 are 3D micrographs of specimens each independently heat-treated by ink jetting the curable composition according to Example 1 at room temperature.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

Unless otherwise specified in the specification, “alkyl group” refers to a C1 to C20 alkyl group, “alkenyl group” refers to a C2 to C20 alkenyl group, and “cycloalkenyl group” refers to a C3 to C20 cycloalkenyl group 　, and , "Heterocycloalkenyl group" refers to a C3 to C20 heterocycloalkenyl group, "aryl group" refers to a C6 to C20 aryl group, and "arylalkyl group" refers to a C6 to C20 arylalkyl group, and "alkylene group" Refers to a C1 to C20 alkylene group, "arylene group" refers to a C6 to C20 arylene group, "alkylarylene group" refers to a C6 to C20 alkylarylene group, and "heteroarylene group" refers to a C3 to C20 hetero It means an arylene group, and the "alkoxyl group" means a C1-C20 alkoxyl group.

Unless otherwise specified in the specification, "substituted" means that at least one hydrogen atom is a halogen atom (F, Cl, Br, I), a hydroxy group, a C1 to C20 alkoxy group, a nitro group, a cyano group, an amine group, an imino group , Azido group, amidino group, hydrazino group, hydrazono group, carbonyl group, carbamyl group, thiol group, ester group, ether group, carboxyl group or salt thereof, sulfonic acid group or salt thereof, phosphoric acid or salt thereof, C1 to C20 alkyl group, C2 to C20 alkenyl group, C2 to C20 alkynyl group, C6 to C20 aryl group, C3 to C20 cycloalkyl group, C3 to C20 cycloalkenyl group, C3 to C20 cycloalkynyl group, C2 to C20 heterocycloalkyl group, It means substituted with a substituent of a C2 to C20 heterocycloalkenyl group, a C2 to C20 heterocycloalkynyl group, a C3 to C20 heteroaryl group, or a combination thereof.

In addition, unless otherwise specified in the specification, "hetero" means that at least one hetero atom of at least one of N, O, S, and P is included in the formula.

In addition, unless otherwise specified in the specification, "(meth)acrylate" means that both "acrylate" and "methacrylate" are possible, and "(meth)acrylic acid" refers to "acrylic acid" and "methacrylic acid. "It means both are possible.

Unless otherwise specified in the specification, "combination" means mixing or copolymerization.

Unless otherwise defined in the chemical formula in the present specification, when a chemical bond is not drawn at a position where a chemical bond is to be drawn, it means that a hydrogen atom is bonded at the position.

In addition, unless otherwise specified in the specification, "*" means a moiety connected with the same or different atoms or chemical formulas.

The curable composition according to one embodiment includes (A) quantum dots; (B) binder resin; (C) a curable monomer comprising a first curable monomer and a second curable monomer; And (D) a solvent, wherein the first curable monomer is a phosphate-based monomer, and the second curable monomer includes at least one curable monomer having a structure different from that of the phosphate-based monomer.

One embodiment relates to an inkjet curable composition containing quantum dots. In the case of ink, increasing the solid content has the advantage of being able to print a certain thickness with a small number of drops. However, when the solid content is increased to 50%, the viscosity increases significantly. In this case, when the viscosity is more than about 15 cps, the ink is not discharged at room temperature and printing is impossible.

In order to improve this, conventionally, the content of the binder resin in the composition has been reduced. However, when the content of the binder resin is reduced, not only the viscosity but also the curing rate decreases, resulting in poor optical properties, poor single-film surface properties, and poor chemical resistance.

However, according to one embodiment, without reducing the content of the binder resin, a phosphate-based low viscosity monomer was added to solve the above problems. Since the phosphate-based functional group in the phosphate-based monomer has good affinity with the surface of the quantum dot, it improves the dispersibility of the quantum dot, and furthermore, the passivation effect of the quantum dot can be obtained, so that the finally prepared curable composition even after curing The luminous efficiency of the quantum dots can be maintained at the same level as the conventional (or achieve the same level or higher), and the viscosity at room temperature will drop to a level capable of ink jetting. In addition, when the phosphate-based monomer has an organic group (functional group) capable of participating in photocuring, a more excellent effect can be obtained in terms of dispersibility.

That is, the curable composition according to an embodiment has a low viscosity at room temperature even when the solid content of the ink is increased by 50% or more, and inkjet printing is possible with a small number of drops, and optical properties are also maintained at an equivalent level or higher compared to the conventional one. I can.

Hereinafter, each component will be described in detail.

(D) quantum dots

The quantum dot absorbs light in a wavelength region of 360 nm to 780 nm, such as 400 nm to 780 nm, and emits fluorescence in a wavelength region of 500 nm to 700 nm, such as 500 nm to 580 nm, or may emit fluorescence from 600 nm to 680 nm. . That is, the photo-conversion material may have a maximum fluorescence emission wavelength (fluorescence λ _em ) at 500 nm to 680 nm.

Each of the quantum dots may independently have a full width at half maximum (FWHM) of 20 nm to 100 nm, for example, 20 nm to 50 nm. When the quantum dots have a half-width in the above range, as the color purity is high, there is an effect of increasing the color reproduction rate when used as a color material in a color filter.

The quantum dots may each independently be an organic material, an inorganic material, or a hybrid (mixture) of an organic material and an inorganic material.

The quantum dots may each independently consist of a core and a shell surrounding the core, and the core and the shell are each independently a group II-IV semiconductor compound, a group III-V semiconductor compound, a group IV-VI semiconductor compound, and a group IV semiconductor It may have a structure such as a core made of a compound, a core/shell, a core/first shell/second shell, an alloy, an alloy/shell, etc., but is not limited thereto.

For example, the core may include at least one material selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, GaN, GaP, GaAs, InP, InAs, and alloys thereof. , Is not necessarily limited thereto. The shell surrounding the core may include at least one material selected from the group consisting of CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, HgSe, and alloys thereof, but is not limited thereto.

In one embodiment, since interest in the environment has recently increased greatly around the world and regulations on toxic substances have been strengthened, instead of a light emitting material having a cadmium-based core, the quantum yield is somewhat low, but environmentally friendly. Although a non-cadmium-based light emitting material (InP/ZnS) was used, it is not limited thereto.

The structure of the quantum dot is not particularly limited, but in the case of the quantum dot of the core/shell structure, the size (average particle diameter) of each of the entire quantum dots including the shell may be 1 nm to 15 nm, for example 5 nm to 15 nm.

For example, the quantum dots may each independently include a red quantum dot, a green quantum dot, or a combination thereof. Each of the red quantum dots may independently have an average particle diameter of 10 nm to 15 nm. Each of the green quantum dots may independently have an average particle diameter of 5 nm to 8 nm.

On the other hand, for the dispersion stability of the quantum dots, the curable composition according to an embodiment may further include a dispersant. The dispersant helps to uniformly disperse a photo-conversion material such as quantum dots in the curable composition, and nonionic, anionic or cationic dispersants may be used. Specifically, polyalkylene glycol or esters thereof, polyoxyalkylene, polyhydric alcohol ester alkylene oxide adduct, alcohol alkylene oxide adduct, sulfonic acid ester, sulfonic acid salt, carboxylic acid ester, carboxylic acid salt, alkyl amide alkylene oxide Adducts, alkyl amines, and the like may be used, and these may be used alone or in combination of two or more. The dispersant may be used in an amount of 0.1% to 100% by weight, such as 10% to 20% by weight, based on the solid content of a photo-conversion material such as quantum dots.

In addition, the quantum dots may improve dispersibility of the quantum dots by surface-modifying the surface of the quantum dots using a separate surface-modifying material. The surface-modifying material used at this time may be any conventional quantum dot surface-modifying material. For example, a quantum dot surface-modified with the surface-modifying material may have a specific functional group on its surface, and the functional group may include a functional group including L-cysteine, a functional group including a phenyl group, and substituted or unsubstituted C1 to C18 hydrocarbons It may include a functional group containing a group (chain type and/or branched type) or a combination thereof, and the functional group containing the phenyl group is selected from the group consisting of phenyl, phenylethyl, N-propylaniline, and combinations thereof. It may be any one, and the functional group including the chain or branched hydrocarbon group is methyl, ethyl, isobutyl, octyl, octadecyl, vinyl (vinyl), allyl (allyl), 7-octen-1-yl (7- octen-1-yl) and a combination thereof may be any one selected from the group consisting of.

The quantum dots may be included in 1% to 40% by weight, such as 3% to 30% by weight, based on the total amount of the curable composition according to an embodiment. When the quantum dots are included within the above range, the light conversion rate is excellent and the pattern characteristics are not impaired, so that excellent fairness may be obtained.

(B) binder resin

The binder resin may include an acrylic resin, an epoxy resin, or a combination thereof.

The acrylic resin is a copolymer of a first ethylenically unsaturated monomer and a second ethylenically unsaturated monomer copolymerizable therewith, and may be a resin including one or more acrylic repeating units.

The first ethylenically unsaturated monomer is an ethylenically unsaturated monomer containing at least one carboxy group, and specific examples thereof include acrylic acid, methacrylic acid, maleic acid, itaconic acid, fumaric acid, or a combination thereof.

The first ethylenically unsaturated monomer may be included in an amount of 5% to 50% by weight, such as 10% to 40% by weight, based on the total amount of the acrylic binder resin.

The second ethylenically unsaturated monomers include aromatic vinyl compounds such as styrene, α-methylstyrene, vinyltoluene, and vinylbenzylmethylether; Methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxy butyl (meth) acrylate, benzyl (meth) acrylate, Unsaturated carboxylic acid ester compounds such as cyclohexyl (meth)acrylate and phenyl (meth)acrylate; Unsaturated carboxylic acid amino alkyl ester compounds such as 2-aminoethyl (meth)acrylate and 2-dimethylaminoethyl (meth)acrylate; Carboxylic acid vinyl ester compounds such as vinyl acetate and vinyl benzoate; Unsaturated carboxylic acid glycidyl ester compounds such as glycidyl (meth)acrylate; Vinyl cyanide compounds such as (meth)acrylonitrile; Unsaturated amide compounds such as (meth)acrylamide; And the like, and these may be used alone or in combination of two or more.

Specific examples of the acrylic binder resin include polybenzyl methacrylate, (meth)acrylic acid/benzyl methacrylate copolymer, (meth)acrylic acid/benzyl methacrylate/styrene copolymer, (meth)acrylic acid/benzyl methacrylate/ 2-hydroxyethyl methacrylate copolymer, (meth)acrylic acid/benzyl methacrylate/styrene/2-hydroxyethyl methacrylate copolymer, etc. may be mentioned, but the present invention is not limited thereto. The above can also be used in combination.

The weight average molecular weight of the acrylic resin may be 5,000 g/mol to 15,000 g/mol.　When the weight average molecular weight of the acrylic resin is within the above range, adhesion to the substrate is excellent, physical and chemical properties are good, and viscosity is appropriate.

The acid value of the acrylic resin may be 80 mgKOH/g to 130 mgKOH/g. When the acid value of the acrylic resin is within the above range, the resolution of the pixel pattern is excellent.

The epoxy resin is a monomer or oligomer that can be polymerized by heat, and may include a compound having a carbon-carbon unsaturated bond and a carbon-carbon cyclic bond.

For example, the epoxy resin may be two or more types of epoxy resins that necessarily include a compound represented by the following formula 3-1 and a compound represented by the following formula 3-2.

[Formula 3-1]

[Chemical Formula 3-2]

(In Formula 3-1 and Formula 3-2,

R ⁵ to R ¹¹ are each independently a hydrogen atom, a halogen atom, or a C1 to C5 alkyl group,

p is an integer from 0 to 25.)

In addition to the above Chemical Formulas 3-1 and 3-2, the epoxy resin includes bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolak type epoxy resin, cyclic aliphatic epoxy resin, and aliphatic polyglycidyl ether. It can be further included.

As a commercial product of such a compound, the bisphenyl epoxy resin represented by Chemical Formula 3-1 includes YX4000, YX4000H, YL6121H, YL6640, and YL6677 of Yuka Shell Epoxy Co., Ltd.; In the cresol novolak type epoxy resin represented by Formula 3-2, the cresol novolak type epoxy resin includes EOCN-102, EOCN-103S, EOCN-104S, EOCN-1020, EOCN-1025, EOCN manufactured by Nippon Kayaku Co., Ltd. -1027 and Epicoat 180S75 of Yukashell Epoxy Co., Ltd.; Bisphenol A type epoxy resins include Epicoats 1001, 1002, 1003, 1004, 1007, 1009, 1010 and 828 of Yuka Shell Epoxy Co., Ltd.; Bisphenol F-type epoxy resin includes Epicoat 807 and 834 of Yuka Shell Epoxy Co., Ltd.; Phenol noblock type epoxy resins include Epicoat 152, 154, 157H65 from Yuka Shell Epoxy Co., Ltd. and EPPN 201, 202 from Nippon Kayaku Co., Ltd.; Other cyclic aliphatic epoxy resins include CIBA-GEIGY AG's CY175, CY177 and CY179, UCC's ERL-4234, ERL-4299, ERL-4221 and ERL-4206, Showa Denko's Shodyne 509. , Araldite CY-182, CY-192 and CY-184 from CIBA-GEIGY AG, Epicron 200 and 400 from Dai Nippon Ink Co., Ltd., and Epicoat 871, 872 from Yuka Shell Epoxy Co., Ltd. And EP1032H60, ED-5661 and ED-5662 of Celanese Coating Co., Ltd.; Aliphatic polyglycidyl ethers include Epicoat 190P and 191P from Yuka Shell Epoxy Co., Ltd., Epolite 100MF from Kyoesha Yushi Chemical Co., Ltd., and Epiol TMP from Nippon Yushi Co., Ltd. I can.

The binder resin may be included in an amount of 1% to 30% by weight, such as 3% to 20% by weight, based on the total amount of the curable composition according to an embodiment. When the content of the binder resin is within the above range, there are excellent effects in heat resistance, chemical resistance, film strength, and physical properties, which are reliability of the pattern formed through inkjet printing prepared therefrom.

(C) curable monomer

The curable composition according to an embodiment includes two types of curable monomers, that is, a first curable monomer and a second curable monomer. The first curable monomer is a phosphate-based monomer, and the second curable monomer includes at least one curable monomer having a structure different from that of the phosphate-based monomer.

For example, the phosphate-based monomer, which is the first curable monomer, may be represented by Formula 1 below.

[Formula 1]

In Formula 1,

R ¹ and R ² are each independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group,

R ³ is a monovalent organic group containing a carbon-carbon double bond,

L ¹ is a substituted or unsubstituted C1 to C20 alkylene group or a substituted or unsubstituted C6 to C20 arylene group.

The phosphate-based monomer represented by Formula 1 is composed of i) a phosphate-based functional group and ii) a photocuring auxiliary functional group containing a monovalent organic group including a carbon-carbon double bond, and the phosphate-based functional group has affinity with the quantum dot surface. It is excellent, can give an effect of modifying the surface of the quantum dot, which in turn improves the dispersibility of the quantum dot, it is possible to prevent a decrease in optical properties of the curable composition containing the quantum dot. That is, the phosphate-based functional group may act as a ligand, thereby making a great contribution to improving the dispersibility of quantum dots. In addition, the monovalent organic group including a carbon-carbon double bond may participate in photocuring through a carbon-carbon double bond to further improve dispersibility.

For example, the monovalent organic group including the carbon-carbon double bond may be represented by the following formula (2).

[Formula 2]

In Chemical Formula 2,

R ⁴ is a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group.

For example, the first curable monomer may be included in an amount of 20% to 80% by weight, such as 30% to 70% by weight, based on the total amount of the binder resin and the first curable monomer. That is, the first curable monomer and the binder resin may be included in a weight ratio of 2:8 to 8:2, such as 3:7 to 7:3. As the content of the binder resin decreases, the viscosity of the curable composition decreases, but the light efficiency of the quantum dots decreases. When the first curable monomer and the binder resin are included in a weight ratio within the above range, the viscosity at room temperature (25° C.) While maintaining at 15 cps or less, optical properties equivalent to those of the case of using an excessive amount of the binder resin can be exhibited.

For example, the first curable monomer may be included in an amount of 1% to 30% by weight based on the total amount of the curable composition. As the content of the first curable monomer is increased, the viscosity improving effect is greater, but when the amount is included in an amount of more than 30% by weight based on the total amount of the curable composition, optical properties are degraded, which is not preferable.

The second curable monomer may include an oxetane-based monomer, an acrylate-based monomer, a thiol-based monomer, or a combination thereof, but is not necessarily limited thereto, and any curable monomer may be used as long as it has a structure different from that of the phosphate-based monomer. Can be used.

For example, the oxetane-based monomer may be represented by Formula 4 below, but is not limited thereto.

[Formula 4]

In Chemical Formula 4,

R ¹² and R ¹² are each independently a substituted or unsubstituted C1 to C20 alkyl group,

L ¹¹ and L ¹² are each independently a substituted or unsubstituted C1 to C20 alkylene group.

Since the oxetane-based monomer contains an oxytanyl group, the degree of curing can be improved.

The thiol-based monomer may be substituted on the surface of the quantum dot (specifically, in the core-shell structured quantum dot, the shell surface) to improve dispersion stability of the quantum dot in a solvent, thereby stabilizing the quantum dot.

The thiol-based monomer may have 1 to 10, for example, 2 to 4 thiol groups (-SH) at the ends according to its structure, and the structure is not particularly limited.

The acrylate-based monomer may be a monofunctional or polyfunctional ester of (meth)acrylic acid having at least one ethylenically unsaturated double bond.

Since the acrylate-based monomer has the ethylenically unsaturated double bond, it is possible to form a pattern having excellent heat resistance, light resistance and chemical resistance by causing sufficient polymerization in the pattern formation process.

Specific examples of the acrylate-based monomer include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, neopentyl Glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A di(meth)acrylate, pentaerythritol di(meth)acrylate Rate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol hexa(meth)acrylate, dipentaerythritol di(meth)acrylate, dipentaerythritol tri(meth)acrylate )Acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, bisphenol A epoxy (meth) acrylate, ethylene glycol monomethyl ether (meth) acrylate, trimethylol propane tri (Meth)acrylate, tris(meth)acryloyloxyethyl phosphate, novolac epoxy (meth)acrylate, etc. are mentioned.

For example, commercially available products of the acrylate-based monomer are as follows. The (meth) acrylic acid is one example of a polyfunctional ester, such as doah Gosei Kagaku Kogyo's (primary)社Aronix M-101 ^®, the same M-111 ^®, the same M-114 ^®; KAYARAD TC-110S ^® of Nihon Kayaku Co., Ltd., TC-120S ^®, etc.; Osaka yukki the like Kagaku Kogyo (main)社of ^{V-158 ®, V-2311} ®. The (meth) transfer function of an example esters of acrylic acid are, doah Gosei cultivating the T (weeks)社of Aronix M-210 ^®, copper or the like M-240 ^®, the same M-6200 ^®; KAYARAD HDDA ^® , HX-220 ^® , R-604 ^{® of} Nihon Kayaku Co., Ltd.; Osaka Yuki Kagaku High School Co., Ltd.'s V-260 ^® , V-312 ^® , and V-335 HP ^® are listed. Examples of the tri-functional ester of (meth) acrylic acid, doah Gosei Kagaku Kogyo (Note)社of Aronix M-309 ^®, the same M-400 ^®, the same M-405 ^®, the same M-450 ^®, Dong M ^® -7100, Dong M-8030 ^®, same M-8060 ^®, and the like; Nippon Kayaku (Note)社of KAYARAD TMPTA ^®, copper DPCA-20 ^{®, ®} copper -30, -60 ^® copper, copper ^® -120 and the like; Osaka Yuki Kayaku High School Co., Ltd.'s V-295 ^® , East-300 ^® , East-360 ^® , East-GPT ^® , East-3PA ^® , and East-400 ^® are listed. The above products can be used alone or in combination of two or more.

The curable monomer may be included in an amount of 1% to 30% by weight based on the total amount of the curable composition according to an embodiment. When the curable monomer is included within the above range, 　 is sufficiently cured in the pattern formation process, resulting in excellent reliability, and excellent heat resistance, light resistance, chemical resistance, resolution and adhesion of the pattern.

(D) solvent

In another embodiment, the curable composition may include a solvent having compatibility with the quantum dots, the binder resin, the curable monomer, and a solvent having compatibility with other additives such as a diffusion agent described later. Specifically, the quantum dot dispersion is prepared by dispersing the quantum dots in a solvent having compatibility with the quantum dots, and then mixed with a solvent having compatibility with a binder resin, a curable monomer, and other additives to prepare a curable composition.

Examples of a solvent having compatibility with the quantum dots include alkanes (R-H) such as pentane, hexane, and heptane; Aromatic hydrocarbons (Ar-H) such as toluene and xylene; Ethers such as diisoamyl ether and dibutyl ether (R-O-R); Alkyl halides (R-X) such as chloroform and trichloromethane; Cycloalkanes, such as cyclopropane, cyclobutane, cyclopentane, and cyclohexane, may be used, but the present invention is not limited thereto.

Examples of a solvent having compatibility with other additives such as the binder resin, the curable monomer, and a diffusion agent described later include alcohols such as methanol and ethanol; Ethers such as dichloroethyl ether, n-butyl ether, diisoamyl ether, methylphenyl ether, and tetrahydrofuran; Glycol ethers such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether; Cellosolve acetates such as methyl cellosolve acetate, ethyl cellosolve acetate, and diethyl cellosolve acetate; Carbitols such as methyl ethyl carbitol, diethyl carbitol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, and diethylene glycol diethyl ether; Propylene glycol alkyl ether acetates such as propylene glycol methyl ether acetate and propylene glycol propyl ether acetate; Aromatic hydrocarbons such as toluene and xylene; Ketones such as methyl ethyl ketone, cyclohexanone, 4-hydroxy-4-methyl-2-pentanone, methyl-n-propyl ketone, methyl-n-butyl ketone, methyl-n-amyl ketone, and 2-heptanone ; Saturated aliphatic monocarboxylic acid alkyl esters such as ethyl acetate, n-butyl acetate, and isobutyl acetate; Lactate esters such as methyl lactate and ethyl lactate; Oxyacetic acid alkyl esters such as methyl oxyacetate, ethyl oxyacetate, and butyl oxyacetate; Alkoxy acetate alkyl esters, such as methoxy methyl acetate, methoxy ethyl acetate, methoxy butyl methoxy acetate, ethoxy methyl acetate, and ethoxy ethyl acetate; 3-oxypropionic acid alkyl esters such as 3-oxy methyl propionate and 3-oxy ethyl propionate; 3-alkoxy propionic acid alkyl esters such as 3-methoxy methyl propionate, 3-methoxy ethyl propionate, 3-ethoxy ethyl propionate, and 3-ethoxy methyl propionate; 2-oxypropionic acid alkyl esters such as 2-oxy methyl propionate, 2-oxy ethyl propionate, and 2-oxy propionate propyl; 2-alkoxy propionic acid alkyl esters such as 2-methoxy methyl propionate, 2-methoxy ethyl propionate, 2-ethoxy ethyl propionate, and 2-ethoxy methyl propionate; 2-oxy-2-methyl propionic acid esters such as 2-oxy-2-methyl methyl propionate and 2-oxy-2-methyl ethyl propionate, 2-methoxy-2-methyl methyl propionate, 2-ethoxy-2- Monooxy monocarboxylic acid alkyl esters of alkyl 2-alkoxy-2-methyl propionate such as ethyl methyl propionate; Esters such as 2-hydroxy ethyl propionate, 2-hydroxy-2-methyl ethyl propionate, hydroxy ethyl acetate, and 2-hydroxy-3-methyl methyl butanoate; Ketone acid esters such as ethyl pyruvate, etc., and also N-methylformamide, N,N-dimethylformamide, N-methylformanilad, N-methylacetamide, N,N-dimethylacetamide , N-methylpyrrolidone, dimethylsulfoxide, benzyl ethyl ether, dihexyl ether, acetylacetone, isophorone, capronic acid, caprylic acid, 1-octanol, 1-nonanol, benzyl alcohol, benzyl acetate, benzoic acid And high boiling point solvents such as ethyl, diethyl oxalate, diethyl maleate, ?butyrolactone, ethylene carbonate, propylene carbonate, and phenyl cellosolve acetate. Among these, in consideration of compatibility and reactivity, glycol ethers such as ethylene glycol monoethyl ether; Ethylene glycol alkyl ether acetates such as ethyl cellosolve acetate; Esters such as ethyl 2-hydroxypropionate; Carbitols such as diethylene glycol monomethyl ether; Propylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate and propylene glycol propyl ether acetate may be used.

The content of the solvent having compatibility with other additives such as the binder resin, the curable monomer and a diffusion agent described below may be used in an amount of 1 to 3 times, for example, 1 to 2 times the content of the solvent having compatibility with the quantum dots. have.

The solvent may be included in the balance, for example, 30% to 80% by weight based on the total amount of the curable composition. When the solvent is included within the above range, since the curable composition has an appropriate viscosity, excellent coating properties may be obtained during spin coating and large area coating using a slit.

Diffuser

The curable composition according to an embodiment may further include a diffusion agent.

For example, the diffusion agent may include barium sulfate (BaSO ₄ ), calcium carbonate (CaCO ₃ ), titanium dioxide (TiO ₂ ), zirconia (ZrO ₂ ), or a combination thereof.

The diffusing agent reflects light not absorbed by the above-described quantum dots, and allows the reflected light to be absorbed again. That is, the diffusion agent may increase the amount of light absorbed by the quantum dots, thereby increasing the light conversion efficiency of the curable composition.

The diffusion agent may have an average particle diameter (D ₅₀ ) of 150 nm to 250 nm, and specifically 180 nm to 230 nm. When the average particle diameter of the diffusing agent is within the above range, it may have a better light diffusion effect and increase light conversion efficiency.

The diffusion agent may be used in the form of a dispersion solution dispersed in a solvent for stability of dispersion in the curable composition.

The diffusion agent may be included in an amount of 0.1% to 20% by weight, such as 1% to 15% by weight, based on the total amount of the curable composition. When the diffusion agent is included in an amount of less than 0.1% by weight based on the total amount of the curable composition, it is difficult to expect the effect of improving the light conversion efficiency by using the diffusion agent, and when it is included in an amount exceeding 20% by weight, pattern characteristics may be deteriorated. There is

Other additives

In order to improve the stability and dispersibility of the quantum dots, the curable composition according to an embodiment may further include a thiol-based additive.

The thiol-based additive may be substituted on the shell surface of the quantum dot to improve dispersion stability of the quantum dot in a solvent, thereby stabilizing the quantum dot.

The thiol-based additive may have 2 to 10, for example, 2 to 4 thiol groups (-SH) at the ends depending on its structure.

For example, the thiol-based additive may include at least two or more functional groups represented by the following formula (6) at the terminal.

[Formula 6]

In Formula 6,

L ³ and L ⁴ are each independently a single bond, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C6 to C20 arylene group, or a substituted or unsubstituted It is a C2 to C20 heteroarylene group.

Specific examples of the thiol-based additive may include one or more selected from compounds represented by the following Formulas 8a to 8e.

[Formula 8a]

[Formula 8b]

[Formula 8c]

[Formula 8d]

[Formula 8e]

The thiol-based additive may be included in an amount of 1% to 10% by weight, such as 1% to 5% by weight, based on the total amount of the curable composition according to an embodiment. When the thiol-based additive is included in an amount of less than 1% by weight, it is difficult to maintain the stability of the quantum dots by process, and when the thiol-based additive is included in an amount of more than 10% by weight, the patternability of the curable composition may be deteriorated, and a change with time may occur at room temperature.

The curable composition according to an embodiment may further include a polymerization inhibitor including a hydroquinone compound, a catechol compound, or a combination thereof. As the curable composition according to the embodiment further includes the hydroquinone-based compound, the catechol-based compound, or a combination thereof, it is possible to prevent crosslinking at room temperature during heat treatment after printing (coating) the curable composition.

For example, the hydroquinone-based compound, the catechol-based compound, or a combination thereof is hydroquinone, methyl hydroquinone, methoxyhydroquinone, t-butyl hydroquinone, 2,5-di- t -butyl hydroquinone, 2,5- Bis(1,1-dimethylbutyl) hydroquinone, 2,5-bis(1,1,3,3-tetramethylbutyl) hydroquinone, catechol, t-butyl catechol, 4-methoxyphenol, pyroga Roll, 2,6-di- t -butyl-4-methylphenol, 2-naphthol, tris(N-hydroxy-N-nitrosophenylaminato-O,O') aluminum (Tris(N-hydroxy-N -nitrosophenylaminato-O,O')aluminium) or a combination thereof, but is not limited thereto.

The hydroquinone compound, the catechol compound, or a combination thereof may be used in the form of a dispersion, and the polymerization inhibitor in the dispersion form is 0.001% to 1% by weight, such as 0.01% to 0.1% by weight, based on the total amount of the curable composition. Can be included as When the stabilizer is included in the above range, it is possible to solve the problem with aging at room temperature and to prevent sensitivity reduction and surface peeling.

In addition, the curable composition according to an embodiment may include malonic acid in order to improve heat resistance and reliability; 3-amino-1,2-propanediol; Silane-based coupling agents; Leveling agents; Fluorine-based surfactant; Or it may further include a combination thereof.

For example, the curable composition may further include a silane-based coupling agent having a reactive substituent such as a vinyl group, a carboxyl group, a methacryloxy group, an isocyanate group, or an epoxy group in order to improve adhesion to the substrate.

Examples of the silane-based coupling agent include trimethoxysilyl benzoic acid, γ methacryl oxypropyl trimethoxysilane, vinyl triacetoxysilane, vinyl trimethoxysilane, γ isocyanate propyl triethoxysilane, γ glycidoxy propyl Trimethoxysilane, βepoxycyclohexyl)ethyltrimethoxysilane, and the like, and these may be used alone or in combination of two or more.

The silane-based coupling agent may be included in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the curable composition. When the silane-based coupling agent is included within the above range, adhesion and storage properties are excellent.

In addition, the curable composition may further include a surfactant, such as a fluorine-based surfactant, in order to improve coating properties and prevent defect formation, that is, to improve leveling performance, if necessary.

The fluorine-based surfactant may have a low weight average molecular weight of 4,000 g/mol to 10,000 g/mol, and specifically, may have a weight average molecular weight of 6,000 g/mol to 10,000 g/mol. In addition, the fluorine-based surfactant may have a surface tension of 18 mN/m to 23 mN/m (measured in a 0.1% propylene glycol monomethyl ether acetate (PGMEA) solution). When the weight average molecular weight and surface tension of the fluorine-based surfactant are within the above ranges, leveling performance can be further improved, and staining can be prevented during high speed coating, and there are few film defects due to fewer bubbles. , It gives excellent properties to slit coating, a high-speed coating method.

The fluorine is a surfactant, the ^{BM Chemie社BM-1000 ®,} BM-1100 ® , and the like; Dainippon ingki Kagaku Kogyo (state) of the mechanical社pack F 142D ^®, Mecca pack ^® F 172, F 173 Mecca pack ^®, Mecca pack ^® F 183, and the like; Sumitomo M. (Note)社pro rod FC-135 ^®, Pro Rad FC-170C ^®, Pro rod FC-430 ^®, Pro rod FC-431 ^®, and the like; Asahi Grass (Note)社of Saffron S-112 ^®, Saffron S-113 ^®, Saffron S-131 ^®, Saffron S-141 ^®, Saffron S-145 ^®, and the like; Toray silicone ^{(Note)社SH-28PA ®, SH} -190 ®, SH-193 ®, SZ-6032 ®, SF-8428 ® , and the like; A fluorine-based surfactant marketed under the names of DIC Corporation's F-482, F-484, F-478, F-554, etc. can be used.

In addition, as the surfactant, a silicone-based surfactant may be used together with the fluorine-based surfactant described above. Specific examples of the silicone-based surfactant include TSF400, TSF401, TSF410, TSF4440 of Toshiba Silicone, but are not limited thereto.

The surfactant may be included in an amount of 0.01 to 5 parts by weight, for example, 0.1 to 2 parts by weight, based on 100 parts by weight of the curable composition.

In addition, in the curable composition according to an embodiment, a certain amount of other additives such as antioxidants may be further added within a range that does not impair physical properties.

The curable composition according to an embodiment may have a viscosity of 1 cps to 15 cps at room temperature (25° C.) because it has the above-described configuration.

Another embodiment provides a cured film prepared using the above-described curable composition.

Another embodiment provides a display device including the cured film.

Another embodiment provides a method of manufacturing a cured film prepared using the above-described curable composition.

The method of manufacturing the cured film includes the steps of forming a pattern by applying the above-described curable composition on a substrate by an ink jet spraying method (S1); And curing the pattern (S2).

(S1) forming a pattern

It is preferable to apply the curable composition to a substrate in a thickness of 0.5 to 20 μm in an inkjet dispersion method. The inkjet spraying can form a pattern by spraying only a single color and spraying it repeatedly according to the number of required colors, and a pattern can also be formed by spraying the required number of colors simultaneously through each inkjet nozzle to reduce the process. have.

(S2) curing step

A pixel can be obtained by curing the obtained pattern. At this time, as a method of curing, both a thermosetting process or a photocuring process can be applied, and a thermosetting process is preferable. The thermal curing process is preferably cured by heating at a temperature of 160° C. or higher, more preferably, curing by heating at 160° C. to 300° C., and a little more preferably heating at 200° C. to 250° C. I can.

Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only preferred examples of the present invention, and the present invention is not limited by the following examples.

Preparation of red quantum dot ink (curable composition)

Using the components mentioned below, curable compositions according to Examples 1 to 3, Comparative Examples 1 and 2 were prepared with the compositions shown in Table 1 below.

Specifically, a base-solution was prepared by first dispersing a curable monomer and a binder resin in a solvent (PGMEA), and then adding a polymerization inhibitor and a diffusion agent in a predetermined amount. Thereafter, a quantum dot dispersion solution prepared by dispersing the red quantum dots in a solvent (dimethyl adipate) in advance was mixed with the base-solution and sufficiently mixed for about 30 minutes.

(A) quantum dots

InP/ZnS quantum dots (fluorescence λ635nm, FWHM=40nm, Red QD, Hansol Chemical)

(B) binder resin

Acrylic resin (TB04, Tacoma)

(C) curable monomer

(C-1) PFM-02 (SMS company)

(C-2) OXT-221 (TOAGOSEI company)

(D) solvent

(D-1) dimethyl adipate (DMA, TCI company)

(D-2) Propylene glycol monomethyl ether acetate (PGMEA, Sigma-Aldrich)

(E) diffusion agent

Titanium dioxide dispersion (TiO ₂ solid content 20% by weight, average particle diameter: 200nm, Dito Technology Co., Ltd.)

(F) thiol additive

Glycol di-3-mercaptopropionate (THIOCURE ^® GDMP, BRUNO BOCK)

(G) polymerization inhibitor

Methyl Hydroquinone (TOKYO CHEMICAL)

(H) other additives

Leveling agent (F-554, DIC company)

(Unit: wt%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 (A) quantum dots 14 14 14 14 14 (B) binder resin 12 6 4 20 - (C) hardening type
Monomer (C-1) 8 14 16 - 20 (C-2) 4 4 4 4 4 (D) solvent (D-1) 33 33 33 33 33 (D-2) 22.5 22.5 22.5 22.5 22.5 (E) diffusion agent 4 4 4 4 4 (F) thiol additive 2 2 2 2 2 (G) polymerization inhibitor 0.2 0.2 0.2 0.2 0.2 (H) other additives 0.3 0.3 0.3 0.3 0.3

Evaluation: Evaluation of viscosity and optical properties of ink

After applying about 2.5 mL of the curable composition prepared in Examples 1 to 3, Comparative Example 1 and Comparative Example 2 on each of the substrates, spin coating was performed using a spin coater (Mikasa Corporation, Opticoat MS-A150, 150 rpm). . Regardless of the composition, the RPM was set to have the same thickness after post-baking (POB). Thereafter, the coated specimens were post-baked (POB) at 180°C for 30 minutes in a convection clean oven (Jongro), and then the light conversion rate was measured using a QE-5000 device from Otsuka.

The viscosity value was measured after 2 minutes at 100 rpm at room temperature (25°C) using a viscometer (RheoStress 6000, HAAKE).

The light conversion rate and viscosity measurement results are shown in Table 2 below.

On the other hand, in order to check whether inkjetting is successful, after dropping a certain amount of the curable composition of Example 1 in a volume of 9 picoliter/drop using an inkjet printer facility (Omnijet100, Unijet) on a substrate with a partition wall, a hot plate ( Pre-baking (PRB) at 120°C for 4 minutes using a hot-plate) and post-baking (POB) at 180°C for 30 minutes in a convection clean oven (jongro) , It was observed with a 3D microscope (VK 9170, KEYENCE company), and the results are shown in Figs.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Light efficiency after POB (%) 33.3 32.9 32.7 33.2 Not measurable Viscosity (cps) 13.7 9.1 7.4 35.1 5.5

As shown in Table 2, it was confirmed that the curable compositions according to Examples 1 to 3 had low viscosity at room temperature without sharply decreasing the light conversion rate, compared to the curable compositions according to Comparative Examples 1 and 2. I can. More specifically, it can be seen from FIGS. 1 and 2 that the curable composition of Example 1 is capable of ink jetting at room temperature.

The present invention is not limited to the above embodiments, but may be manufactured in a variety of different forms, and those of ordinary skill in the art to which the present invention pertains, other specific forms without changing the technical spirit or essential features of the present invention. It will be appreciated that it can be implemented with. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

Claims (17)

(A) quantum dots;
(B) binder resin;
(C) a curable monomer comprising a first curable monomer and a second curable monomer; And
(D) solvent
Including,
The first curable monomer is a phosphate-based monomer,
The second curable monomer is a curable composition comprising at least one curable monomer having a structure different from the phosphate-based monomer.
The method of claim 1,
The phosphate-based monomer is a curable composition represented by the following Formula 1:
[Formula 1]

In Formula 1,
R ¹ and R ² are each independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group,
R ³ is a monovalent organic group containing a carbon-carbon double bond,
L ¹ is a substituted or unsubstituted C1 to C20 alkylene group or a substituted or unsubstituted C6 to C20 arylene group.
The method of claim 2,
The curable composition of the monovalent organic group including the carbon-carbon double bond represented by the following formula (2):
[Formula 2]

In Chemical Formula 2,
R ⁴ is a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group.
The method of claim 1,
The first curable monomer is a curable composition contained in an amount of 20% to 80% by weight based on the total amount of the binder resin and the first curable monomer.
The method of claim 1,
The first curable monomer is a curable composition comprising 1% to 30% by weight based on the total amount of the curable composition.
The method of claim 1,
The second curable monomer is a curable composition comprising an oxetane-based monomer, an acrylate-based monomer, a thiol-based monomer, or a combination thereof.
The method of claim 1,
The curable composition is a curable composition having a viscosity of 1 cps to 15 cps at 25 ℃.
The method of claim 1,
The binder resin is a curable composition comprising an acrylic resin, an epoxy resin, or a combination thereof.
The method of claim 1,
The quantum dot is a solvent-free curable composition having a maximum fluorescence emission wavelength at 500nm to 680nm.
The method of claim 1,
The curable composition further comprises a diffusing agent.
The method of claim 10,
The curable composition containing the diffusion agent in an amount of 0.1% to 20% by weight based on the total amount of the curable composition.
The method of claim 10,
The diffusing agent is a curable composition comprising barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.
The method of claim 1,
The curable composition is a curable composition comprising 1% to 40% by weight of the quantum dots, 1% to 30% by weight of the binder resin, 1% to 30% by weight of the curable monomer, and the balance of the solvent based on the total amount of the curable composition.
The method of claim 1,
The curable composition is a thiol-based additive; Polymerization inhibitors; Malonic acid; 3-amino-1,2-propanediol; Silane-based coupling agents; Leveling agents; Fluorine-based surfactant; Or a curable composition further comprising a combination thereof.
A cured film prepared by using the curable composition according to any one of claims 1 to 14.
A display device comprising the cured film of claim 15.
Forming a pattern by applying the curable composition according to any one of claims 1 to 14 on a substrate by an ink jet spraying method; And
Curing the pattern
Cured film production method comprising a.

Images