Curable composition, cured film produced using said composition, color filter including said cured film, and display device including said color filter

Abstract

(A) quantum dots; and (B) a material with a viscosity of less than 6.2 cps and a vapor pressure of less than 1×10 -6 torr~3×10 -3 torr, a cured film produced using the curable composition, a color filter including the cured film, and a display device including the color filter.

Description

[Technical Field]

[0001] The present description relates to curable compositions, cured films prepared using the compositions, color filters including the cured films, and display devices including the color filters. [Background technology]

[0002] In the case of general quantum dots, the solvents in which they can be dispersed are limited due to their hydrophobic surface properties, which makes it difficult to incorporate them into polar systems such as binders and curable monomers.

[0003] For example, quantum dot ink compositions, which are being actively researched, were initially only dispersed in solvents used in curable compositions with relatively low polarity and high hydrophobicity. As a result, it was difficult to incorporate quantum dots at 20% by weight or more of the total composition, making it impossible to increase the optical efficiency of the ink beyond a certain level. Even if quantum dots were added and dispersed to increase the optical efficiency, the viscosity exceeded the range in which ink-jetting was possible, making it impossible to satisfy processability.

[0004] In addition, in order to achieve a viscosity range that allows ink-jetting, a method has been used in which the ink solid content is reduced by including 50% or more by weight of a solvent relative to the total amount of the entire composition. Although this method also provides somewhat satisfactory results in terms of viscosity, it has the disadvantage of being difficult to apply to actual processes, as it can cause problems such as nozzle drying due to solvent evaporation during ink-jetting, nozzle clogging, and a decrease in the single film thickness over time after ink-jetting, as well as severe thickness deviation after curing.

[0005] Therefore, the most suitable form of quantum dot ink for practical application is a solvent-free type, and it is considered that the current technology for applying quantum dots themselves to a solvent-based composition has already reached a certain limit.

[0006] In the case of solventless curable compositions (quantum dot ink compositions), the excessive amount of polymerizable compound can lead to problems such as nozzle clogging and ejection failure due to volatility-related drying, and a decrease in monolayer thickness due to evaporation of the ink composition jetted into pattern partition pixels. Therefore, it is desirable to minimize the viscosity of solventless curable compositions. Efforts have been made to reduce the viscosity of solventless curable compositions by increasing the molecular weight of the polymerizable monomer or modifying the structure of the polymerizable compound, such as by introducing a chemical structure containing a hydroxyl group. However, solventless curable compositions with the desired low viscosity have yet to be developed, and as a result, one of the problems to date is that only curable compositions with poor ink-jetting properties can be provided. Summary of the Invention [Problem to be solved by the invention]

[0007] One embodiment is to provide a curable composition that has low viscosity and low volatility, and thus has a high film remaining rate after ink-jetting into a pixel.

[0008] Another embodiment provides a cured film produced using the curable composition.

[0009] Another embodiment provides a color filter including the cured film.

[0010] Yet another embodiment provides a display device including the color filter. [Means for solving the problem]

[0011] One embodiment is a composition comprising: (A) quantum dots; and (B) a composition having a viscosity of less than 6.2 cps and a vapor pressure of less than 1×10 -6 torr~3×10 -3 torr.

[0012] The curable monomer may have a viscosity of 3 cps or more and less than 6.2 cps.

[0013] The curable monomer may have an asymmetric structure.

[0014] The curable monomer can be represented by the following Chemical Formula 1.

[0015] [ka]

[0016] In the above chemical formula 1, R a is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, L a is an unsubstituted alkylene group having 1 to 8 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by the following chemical formula 2,

[0017] [ka]

[0018] In the above chemical formula 2, L b and L c are each independently a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, n is an integer of 1 to 3.

[0019] In the above Chemical Formula 1, L a may be an unsubstituted alkylene group having 1 to 8 carbon atoms, an unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by Chemical Formula 2 above.

[0020] In the above Chemical Formula 2, L b and L c may each independently be an unsubstituted alkylene group having 1 to 6 carbon atoms.

[0021] The curable monomer can be represented by any one of the following formulas 1-1 to 1-9.

[0022] [ka]

[0023] The quantum dots may be quantum dots whose surface has been modified with a ligand having a polar group.

[0024] The ligand having a polar group can be represented by any one of the following formulas 3 to 16.

[0025] [ka]

[0026] In the above chemical formulas 3 to 8, R 1 ~R 7 each independently represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, L 1 ~L 16 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n1 to n7 each independently represent an integer of 0 to 10,

[0027] [ka]

[0028] In the above chemical formulas 9 to 11, R 8 and R 9 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. Based on can be, L 17 ~L 23 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n8 to n10 are each independently an integer of 0 to 10,

[0029] [ka]

[0030] In the above chemical formulas 12 to 15, R 10 ~R 15 are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L 24 ~L 29 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n11 to n16 each independently represent an integer of 0 to 10,

[0031] [ka]

[0032] In the above chemical formula 16, R 16 ~R 18 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L 30 ~L 32 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n17 to n19 each independently represent an integer of 0 to 10.

[0033] The curable composition may be a solventless curable composition.

[0034] the solvent-free curable composition contains the quantum dots in an amount of 5% by weight to 60% by weight based on the total amount of the solvent-free curable composition; and Curable Monomer It can contain 40% to 95% by weight.

[0035] The curable composition may further include a polymerization initiator, a light diffusing agent, a polymerization inhibitor, or a combination thereof.

[0036] The light diffuser may include barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.

[0037] The curable composition may further comprise a solvent.

[0038] The curable composition including the solvent contains the quantum dots in an amount of 1 wt % to 40 wt % based on the total weight of the curable composition; Curable Monomer 1% to 20% by weight; and 40% to 80% by weight of said solvent.

[0039] The curable composition may further comprise malonic acid; 3-amino-1,2-propanediol; a silane coupling agent; a leveling agent; a fluorosurfactant; or a combination thereof.

[0040] Another embodiment provides a cured film produced using the curable composition.

[0041] Yet another embodiment provides a color filter comprising the cured film.

[0042] Another embodiment provides a display device including the color filter.

[0043] Other specific aspects of the present invention are included in the detailed description below. [Effects of the Invention]

[0044] In order to effectively reduce the viscosity of the quantum dot-containing curable composition, the viscosity and vapor pressure of the curable monomer are controlled within a specific range, and specifically, a curable monomer having a specific asymmetric structure is used to control the viscosity and vapor pressure of the curable monomer within a specific range, ultimately providing a quantum dot-containing curable composition with low viscosity and low volatility. DETAILED DESCRIPTION OF THE INVENTION

[0045] DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the present invention is provided by way of example only and is not intended to limit the scope of the present invention, which is defined solely by the scope of the claims that follow.

[0046] Unless otherwise specified, in this specification, an "alkyl group" means an alkyl group having 1 to 20 carbon atoms, an "alkenyl group" means an alkenyl group having 2 to 20 carbon atoms, a "cycloalkenyl group" means a cycloalkenyl group having 3 to 20 carbon atoms, a "heterocycloalkenyl group" means a heterocycloalkenyl group having 3 to 20 carbon atoms, an "aryl group" means an aryl group having 6 to 20 carbon atoms, an "arylalkyl group" means an arylalkyl group having 6 to 20 carbon atoms, an "alkylene group" means an alkylene group having 1 to 20 carbon atoms, an "arylene group" means an arylene group having 6 to 20 carbon atoms, an "alkylarylene group" means an alkylarylene group having 6 to 20 carbon atoms, a "heteroarylene group" means a heteroarylene group having 3 to 20 carbon atoms, and an "alkoxylen group" means an alkoxylen group having 1 to 20 carbon atoms.

[0047] Unless otherwise specified in this specification, "substituted" means that at least one hydrogen atom has been replaced with a halogen atom (F, Cl, Br, I), a hydroxy group, an alkoxy group having 1 to 20 carbon atoms, a nitro group, a cyano group, an amine group, an imino group, an azide group, an amidino group, a hydrazino group, a hydrazono group, a carbonyl group, a carbamoyl group, a thiol group, an ester group, an ether group, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, an alkyl group having 1 to 20 carbon atoms, a carbon atom, a It means being substituted with an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, a cycloalkynyl group having 3 to 20 carbon atoms, a heterocycloalkyl group having 2 to 20 carbon atoms, a heterocycloalkenyl group having 2 to 20 carbon atoms, a heterocycloalkynyl group having 2 to 20 carbon atoms, a heteroaryl group having 3 to 20 carbon atoms, or a substituent that is a combination thereof.

[0048] Unless otherwise specified in this specification, the term "hetero" means that at least one heteroatom selected from N, O, S, and P is contained in the chemical formula.

[0049] In addition, unless otherwise specified in this specification, "(meth)acrylate" means that both "acrylate" and "methacrylate" are possible, and "(meth)acrylic acid" means that both "acrylic acid" and "methacrylic acid" are possible.

[0050] Unless otherwise specified herein, "combination" means blending or copolymerization.

[0051] Unless otherwise defined in a chemical formula herein, when a chemical bond is not drawn at a position where a chemical bond should be drawn, it means that a hydrogen atom is bonded to that position.

[0052] Also, unless otherwise specified in this specification, "*" means a moiety connected to the same or different atom or chemical formula.

[0053] The object of the present invention is to effectively reduce the viscosity of a quantum dot-containing curable composition by changing one functional group of the structure of an existing diacrylate-based curable monomer to a methacrylate group, resulting in an asymmetric structure. Such a curable monomer has low viscosity and vapor pressure, and a quantum dot-containing curable composition containing this has a lower viscosity than other compositions and is less volatile than other compositions with similar viscosity. Furthermore, the remaining film rate does not decrease significantly over time after ink-jetting into a pixel, thereby enabling the realization of excellent color filters and display devices.

[0054] Generally, diacrylate-based curable monomers have the advantage that their viscosity can be reduced by adjusting the molecular weight, but have the disadvantage that it is difficult to rapidly reduce their vapor pressure even if their chemical structure is modified.

[0055] In addition, dimethacrylate-based curable monomers are somewhat inferior in curability to diacrylate-based curable monomers, but have the significant advantage of low vapor pressure. Therefore, there have been attempts to prepare quantum dot-containing curable compositions by mixing diacrylate-based curable monomers and dimethacrylate-based curable monomers, but these attempts have only confirmed that, after ink-jetting, there is no interaction or azotropic effect between the two curable monomers within the pixel, and each curable monomer is volatilized separately due to the vapor pressure of each curable monomer.

[0056] Therefore, the inventors of the present invention have conducted extensive research and have found that the viscosity and vapor pressure of a curable monomer can be controlled within a specific range by using a structure in which an acrylate group and a methacrylate group coexist asymmetrically in one monomer structure (one body) in terms of chemical structure. They have also found that a quantum dot-containing curable composition containing such a curable monomer has lower viscosity and volatility than conventional compositions, which has led to the completion of the present invention.

[0057] Hereinafter, each component constituting the curable composition according to one embodiment will be specifically described.

[0058] Curable Monomer To improve inkjetting properties and enable a smooth inkjetting process, it is preferable to use a curable monomer with low vapor pressure and viscosity. However, the structure of a general curable monomer, i.e., a curable monomer having at least one carbon-carbon double bond at both ends, has many limitations due to the trade-off between vapor pressure and viscosity.

[0059] Therefore, while conventional research and development efforts have focused on finding an optimal combination of curable monomers with different viscosities and vapor pressures, the present inventors have taken a different approach, namely, using one curable monomer and modifying its structure to have an asymmetric structure to obtain a single curable monomer with low viscosity and vapor pressure, i.e., a viscosity of less than 6.2 cps and a vapor pressure of 1×10 -6 torr~3×10 -3 The inventors have obtained a curable monomer having a viscosity of 1000 volatility, and have confirmed that the quantum dot-containing curable composition containing the same has low viscosity and low volatility compared to other compositions with similar viscosity levels. Therefore, even after ink-jetting into a pixel, the remaining film rate does not decrease significantly, and a cured film with excellent patternability can be provided.

[0060] Specifically, one embodiment provides a composition comprising: (A) quantum dots; and (B) a composition having a viscosity of less than 6.2 cps and a vapor pressure of less than 1×10 -6 torr~3×10 -3 The present invention provides a curable composition comprising a curable monomer that is a torr. In this specification, the viscosity and vapor pressure are values ​​measured at room temperature, 25°C.

[0061] For example, the curable monomer may have a viscosity of 3 cps or more and less than 6.2 cps.

[0062] The curable monomer may have an asymmetric structure, so that a single curable monomer can have low viscosity and low vapor pressure. For example, symmetrical structures that are not asymmetric, such as diacrylate-based curable monomers and dimethacrylate-based curable monomers, have low viscosities but high vapor pressures, or low vapor pressures but high viscosities, and therefore cannot be used as curable monomers in the curable composition according to one embodiment.

[0063] Specifically, the curable monomer, more specifically, the curable monomer having an asymmetric structure can be represented by the following Chemical Formula 1.

[0064] [ka]

[0065] In the above chemical formula 1, R a is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, L a is an unsubstituted alkylene group having 1 to 8 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by the following chemical formula 2,

[0066] [ka]

[0067] In the above chemical formula 2, L b and L c are each independently a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, n is an integer of 1 to 3.

[0068] The asymmetric curable monomer not only has an asymmetric structure, but also the more unsubstituted the intermediate linking group between the acrylate group at one end and the methacrylate group at the other end is, and the shorter its length, the lower the viscosity and vapor pressure of the curable monomer can be. That is, both the viscosity and vapor pressure are low, specifically, the viscosity is less than 6.2 cps and the vapor pressure is less than 1×10 -4 torr~3×10 -3 To obtain a curable monomer having a vapor pressure of 1000 torr, not only the asymmetric structure but also the structure of the intermediate linking group (presence or absence of substituents, length, etc.) must be considered.

[0069] For example, in the above Chemical Formula 1, L a may be an unsubstituted alkylene group having 1 to 8 carbon atoms, an unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by Chemical Formula 2 above.

[0070] For example, in the above Chemical Formula 2, L b and L c may each independently be an unsubstituted alkylene group having 1 to 6 carbon atoms.

[0071] For example, the curable monomer may be represented by any one of the following formulas 1-1 to 1-9, but is not necessarily limited thereto.

[0072] [ka]

[0073] When the curable composition according to one embodiment is a solventless curable composition, the curable monomer may be included in an amount of 40 wt% to 95 wt%, for example, 40 wt% to 85 wt%, for example, 40 wt% to 80 wt%, based on the total amount of the solventless curable composition. When the content of the curable monomer is within this range, a solventless curable composition having a low viscosity, for example, a viscosity of 10 cPs to 30 cPs, that allows ink-jetting can be prepared, and the volatility is lower than that of other quantum dot-containing curable compositions having the same viscosity. Furthermore, the quantum dots in the prepared solventless curable composition can have excellent dispersibility, resulting in improved optical properties.

[0074] When the curable composition contains a solvent, the curable monomer may be contained in an amount of 1% by weight to 15% by weight, for example, 5% by weight to 15% by weight, based on the total amount of the curable composition. When the curable monomer is contained within this range, the optical properties of the quantum dots can be improved.

[0075] For example, the curable monomer may have a molecular weight of 100 g / mol to 800 g / mol. When the molecular weight of the curable monomer is in this range, it does not impair the optical properties of the quantum dots and does not increase the viscosity of the composition, which may be advantageous for ink-jetting.

[0076] In addition, the curable composition according to one embodiment may further include a monomer commonly used in conventional heat-curable or photo-curable compositions (e.g., an oxetane-based compound such as bis[1-ethyl(3-oxetanyl)]methyl ether) in addition to the curable monomer.

[0077] quantum dots According to one embodiment, the quantum dots in the curable composition may be surface-modified with a ligand having a polar group, for example, a ligand having high affinity with the polymerizable compound. Surface-modified quantum dots as described above can greatly facilitate the preparation of highly concentrated or highly concentrated quantum dot dispersions (improving the dispersibility of quantum dots in polymerizable monomers), which can have a significant impact on improving light efficiency and can be particularly advantageous for realizing solvent-free curable compositions.

[0078] For example, the ligand having a polar group can have a structure that has high affinity with the chemical structure of the polymerizable compound.

[0079] For example, the ligand having a polar group can be represented by any one of the following formulas 3 to 16, but is not necessarily limited thereto.

[0080] [ka]

[0081] In the above chemical formulas 3 to 8, R 1 ~R 7 each independently represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, L 1 ~L 16 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n1 to n7 each independently represent an integer of 0 to 10.

[0082] [ka]

[0083] In the above chemical formulas 9 to 11, R 8 and R 9 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. Based on can be, L 17 ~L 23 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n8 to n10 each independently represent an integer of 0 to 10.

[0084] [ka]

[0085] In the above chemical formulas 12 to 15, R 10 ~R 15 are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L 24 ~L 29 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n11 to n16 each independently represent an integer of 0 to 10.

[0086] [ka]

[0087] In the above chemical formula 16, R 16 ~R 18 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L 30 ~L 32 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n17 to n19 each independently represent an integer of 0 to 10.

[0088] For example, the compounds represented by Chemical Formulae 3 to 16 can be represented by any one of the compounds represented by Chemical Formulae A to Q below, but are not necessarily limited thereto.

[0089] [ka]

[0090] (In the above chemical formula D, m1 is an integer of 0 to 10.)

[0091] [ka]

[0092] [ka]

[0093] [ka]

[0094] When the ligand is used, the surface modification of quantum dots is easier. When quantum dots whose surface has been modified with the ligand are added to the polymerizable compound and stirred, a very transparent dispersion can be obtained, which is a measure of whether the surface modification of the quantum dots has been performed very well.

[0095] For example, the quantum dots may have a maximum fluorescence emission wavelength between 500 nm and 680 nm.

[0096] For example, when the curable composition according to one embodiment is a solventless curable composition, the quantum dots may be contained in an amount of 5 to 60% by weight, for example, 10 to 60% by weight, for example, 20 to 60% by weight, or for example, 30 to 50% by weight. When the quantum dots are contained within the above range, high light maintenance and light efficiency can be achieved even after curing.

[0097] For example, when the curable composition according to one embodiment is a curable composition containing a solvent, the quantum dots may be contained in an amount of 1 wt % to 40 wt %, for example, 3 wt % to 30 wt %, based on the total amount of the curable composition. When the quantum dots are contained within this range, the photoconversion rate is excellent and the pattern characteristics and development characteristics are not impaired, resulting in excellent processability.

[0098] To date, quantum dot-containing curable compositions (inks) have been developed with the aim of specializing in thiol-based binders or monomers that are compatible with quantum dots, and are even being commercialized.

[0099] For example, the quantum dots can absorb light in a wavelength range of 360 nm to 780 nm, for example, in a wavelength range of 400 nm to 780 nm, and emit fluorescence in a wavelength range of 500 nm to 700 nm, for example, in a wavelength range of 500 nm to 580 nm, or in a wavelength range of 600 nm to 680 nm. That is, the quantum dots can have a maximum fluorescence emission wavelength (fluorescence λ ) in the range of 500 nm to 680 nm. em ) can be included.

[0100] The quantum dots may each 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 full width at half maximum in this range, their high color purity results in an improved color reproduction rate when used as a color material in a color filter.

[0101] The quantum dots may each independently be organic, inorganic, or a hybrid of organic and inorganic materials.

[0102] The quantum dots may each independently be composed of a core and a shell surrounding the core, and the core and shell may each independently have a structure such as a core made of Group II-IV, Group III-V, etc., a core / shell, a core / first shell / second shell, an alloy, or an alloy / shell, but are not limited thereto.

[0103] For example, the core may include, but is not limited to, 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. The shell surrounding the core may include, but is not limited to, at least one material selected from the group consisting of CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, HgSe, and alloys thereof.

[0104] In one embodiment, environmentally friendly non-cadmium-based luminescent materials (e.g., InP / ZnS, InP / ZeSe / ZnS) are used instead of luminescent materials having a cadmium core, because environmental concerns have recently increased significantly worldwide and regulations on toxic substances have been strengthened. However, the present invention is not limited to this.

[0105] In the case of quantum dots with a core / shell structure, the size (average particle size) of each of the entire quantum dots including the shell may be 1 nm to 15 nm, for example, 5 nm to 15 nm.

[0106] For example, the quantum dots may each independently comprise red quantum dots, green quantum dots, or a combination thereof. The red quantum dots may each independently have an average particle size of 10 nm to 15 nm. The green quantum dots may each independently have an average particle size of 5 nm to 8 nm.

[0107] Meanwhile, to stabilize the dispersion of the quantum dots, the curable composition according to one embodiment may further include a dispersant. The dispersant helps to uniformly disperse the light conversion material, such as quantum dots, within the curable composition, and may be any of nonionic, anionic, or cationic dispersants. Specifically, polyalkylene glycols or their esters, polyoxyalkylenes, polyhydric alcohol ester alkylene oxide adducts, alcohol alkylene oxide adducts, sulfonate esters, sulfonate salts, carboxylate esters, carboxylate salts, alkylamide alkylene oxide adducts, and alkylamines may be used alone or in combination. The dispersant may be used in an amount of 0.1 wt % to 100 wt %, for example, 10 wt % to 20 wt %, based on the solid content of the light conversion material, such as quantum dots.

[0108] Light diffusing agent The curable composition according to one embodiment may further comprise a light diffusing agent.

[0109] For example, the light diffusing agent can include barium sulfate (BaSO4), calcium carbonate (CaCO3), titanium dioxide (TiO2), zirconia (ZrO2), or a combination thereof.

[0110] The light diffusing agent reflects light that is not absorbed by the quantum dots, allowing the quantum dots to re-absorb the reflected light. That is, the light diffusing agent increases the amount of light absorbed by the quantum dots, thereby increasing the light conversion efficiency of the curable composition.

[0111] The light diffusing agent has an average particle size (D 50 ) may be 150 nm to 250 nm, specifically 180 nm to 230 nm. When the average particle size of the light diffusing agent is within the above range, a better light diffusing effect can be obtained, and the light conversion efficiency can be increased.

[0112] The light diffusing agent may be included in an amount of 1 wt% to 20 wt%, for example, 2 wt% to 15 wt%, for example, 3 wt% to 10 wt%, based on the total amount of the curable composition. If the light diffusing agent is included in an amount of less than 1 wt% based on the total amount of the curable composition, it is difficult to expect an improvement in light conversion efficiency due to the use of the light diffusing agent, and if it is included in an amount of more than 20 wt%, there is a risk of quantum dot sedimentation occurring.

[0113] polymerization initiator The curable composition according to an embodiment may further include a polymerization initiator, for example, a photoinitiator, a thermal initiator, or a combination thereof.

[0114] The photopolymerization initiator is an initiator commonly used in photosensitive resin compositions, and examples thereof include, but are not limited to, acetophenone-based compounds, benzophenone-based compounds, thioxanthone-based compounds, benzoin-based compounds, triazine-based compounds, oxime-based compounds, and aminoketone-based compounds.

[0115] Examples of the acetophenone compounds include 2,2'-diethoxyacetophenone, 2,2'-dibutoxyacetophenone, 2-hydroxy-2-methylpropiophenone, pt-butyltrichloroacetophenone, pt-butyldichloroacetophenone, 4-chloroacetophenone, 2,2'-dichloro-4-phenoxyacetophenone, 2-methyl-1-(4-(methylthio)phenyl)-2-morpholinopropan-1-one, and 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one.

[0116] Examples of the benzophenone-based compounds include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4'-bis(dimethylamino)benzophenone, 4,4'-bis(diethylamino)benzophenone, 4,4'-dimethylaminobenzophenone, 4,4'-dichlorobenzophenone, and 3,3'-dimethyl-2-methoxybenzophenone.

[0117] Examples of the thioxanthone compounds include thioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, and 2-chlorothioxanthone.

[0118] Examples of the benzoin-based compounds include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and benzyl dimethyl ketal.

[0119] Examples of the triazine compounds include 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloromethyl)-s-triazine, 2-(3',4'-dimethoxystyryl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4'-methoxynaphthyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-methoxyphenyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-tolyl)-4,6-bis(trichloromethyl)-s-triazine, azine, 2-biphenyl-4,6-bis(trichloromethyl)-s-triazine, bis(trichloromethyl)-6-styryl-s-triazine, 2-(naphth-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxynaphth-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-4-bis(trichloromethyl)-6-piperonyl-s-triazine, 2-4-bis(trichloromethyl)-6-(4-methoxystyryl)-s-triazine, and the like.

[0120] Examples of the oxime compound include O-acyloxime compounds, 2-(O-benzoyloxime)-1-[4-(phenylthio)phenyl]-1,2-octanedione, 1-(O-acetyloxime)-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone, and O-ethoxycarbonyl-α-oxyamino-1-phenylpropan-1-one. Specific examples of the O-acyloxime compound include 1,2-octanedione, 2-dimethylamino-2-(4-methylbenzyl)-1-(4-morpholin-4-yl-phenyl)-butan-1-one, 1-(4-phenylsulfanylphenyl)-butane-1,2-dione-2-oxime-O-benzoate, 1-(4-phenylsulfanylphenyl)-octane-1,2-dione-2-oxime-O-benzoate, 1-(4-phenylsulfanylphenyl)-octan-1-one oxime-O-acetate, and 1-(4-phenylsulfanylphenyl)-butan-1-one oxime-O-acetate.

[0121] Examples of the aminoketone compounds include 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1.

[0122] In addition to the above compounds, the photopolymerization initiator may also be a carbazole-based compound, a diketone compound, a sulfonium borate-based compound, a diazo-based compound, an imidazole-based compound, or a biimidazole-based compound.

[0123] The photoinitiator may be used in conjunction with a photosensitizer that absorbs light, becomes excited, and then transfers the energy to initiate a chemical reaction.

[0124] Examples of the photosensitizer include tetraethylene glycol bis-3-mercaptopropionate, pentaerythritol tetrakis-3-mercaptopropionate, and dipentaerythritol tetrakis-3-mercaptopropionate.

[0125] Examples of the thermal polymerization initiator include peroxides, specifically benzoyl peroxide, dibenzoyl peroxide, lauryl peroxide, dilauryl peroxide, di-tert-butyl peroxide, cyclohexane peroxide, methyl ethyl ketone peroxide, hydroperoxides (e.g., tert-butyl hydroperoxide, cumene hydroperoxide), dicyclohexyl peroxydicarbonate, 2,2-azo-bis(isobutyronitrile), t-butyl perbenzoate, and 2,2′-azobis-2-methylpropionitrile, but are not limited thereto, and any initiators widely known in the art can be used.

[0126] The polymerization initiator may be included in an amount of 0.1 wt % to 5 wt %, for example, 1 wt % to 4 wt %, based on the total amount of the curable composition. When the polymerization initiator is included in this range, sufficient curing occurs upon exposure or thermal curing, thereby achieving excellent reliability and preventing a decrease in transmittance due to unreacted initiator, thereby preventing a decrease in the optical properties of the quantum dots.

[0127] binder resin The curable composition according to an embodiment may further include a binder resin.

[0128] The binder resin may include an acrylic resin, a cardo resin, an epoxy resin, or a combination thereof.

[0129] The acrylic resin may be a copolymer of a first ethylenically unsaturated monomer and a second ethylenically unsaturated monomer copolymerizable therewith, and may be a resin containing one or more acrylic repeating units.

[0130] 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., but are not limited thereto, and these may be used alone or in combination of two or more.

[0131] 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 this range, the resin exhibits excellent adhesion to the substrate, good physical and chemical properties, and appropriate viscosity.

[0132] The acrylic resin may have an acid value of 80 mgKOH / g to 130 mgKOH / g. When the acid value of the acrylic resin is within this range, the resolution of the pixel pattern is excellent.

[0133] The cardo resin may be a resin used in a conventional curable resin (or photosensitive resin) composition, for example, a resin disclosed in Korean Patent Publication No. 10-2018-0067243, but is not limited thereto.

[0134] The cardo resin may be prepared by mixing two or more of the following compounds: a fluorene-containing compound such as 9,9-bis(4-oxiranylmethoxyphenyl)fluorene; an anhydride compound such as benzenetetracarboxylic dianhydride, naphthalenetetracarboxylic dianhydride, biphenyltetracarboxylic dianhydride, benzophenonetetracarboxylic dianhydride, pyromellitic dianhydride, cyclobutanetetracarboxylic dianhydride, perylenetetracarboxylic dianhydride, tetrahydrofurantetracarboxylic dianhydride, and tetrahydrophthalic anhydride; a glycol compound such as ethylene glycol, propylene glycol, and polyethylene glycol; an alcohol compound such as methanol, ethanol, propanol, n-butanol, cyclohexanol, and benzyl alcohol; a solvent compound such as propylene glycol methyl ethyl acetate and N-methylpyrrolidone; a phosphorus compound such as triphenylphosphine; and an amine or ammonium salt compound such as tetramethylammonium chloride, tetraethylammonium bromide, benzyldiethylamine, triethylamine, tributylamine, and benzyltriethylammonium chloride.

[0135] The cardo resin may have a weight-average molecular weight of 500 g / mol to 50,000 g / mol, for example, 1,000 g / mol to 30,000 g / mol. When the weight-average molecular weight of the cardo resin is within this range, pattern formation is excellent without residue during cured film production, and there is no loss of film thickness during development of the solvent-based curable composition, resulting in a good pattern.

[0136] When the binder resin is a cardo resin, the curable composition containing the same, particularly the photosensitive resin composition, has excellent developability and sensitivity upon photocuring, and is excellent in fine pattern formability.

[0137] The epoxy resin is a monomer or oligomer that is polymerized by heat, and may include compounds having carbon-carbon unsaturated bonds and carbon-carbon cyclic bonds.

[0138] The epoxy resin may include, but is not limited to, bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cycloaliphatic epoxy resin, and aliphatic polyglycidyl ether.

[0139] Commercially available products of such compounds include bisphenyl epoxy resins such as YX4000, YX4000H, YL6121H, YL6640, and YL6677 from Yuka Shell Epoxy Co., Ltd.; cresol novolac epoxy resins such as EOCN-102, EOCN-103S, EOCN-104S, EOCN-1020, EOCN-1025, and EOCN-1027 from Nippon Kayaku Co., Ltd., and Epicoat 180S75 from Yuka Shell Epoxy Co., Ltd.; and bisphenol A epoxy resins. For epoxy resins, use Yuka Shell Epoxy's Epicoat 1001, 1002, 1003, 1004, 1007, 1009, 1010, and 828; for bisphenol F epoxy resins, use Yuka Shell Epoxy's Epicoat 807 and 834; for phenol novolac epoxy resins, use Yuka Shell Epoxy's Epicoat 152, 154, 157H65 and Nippon Kayaku's EPPN201 and 202; and for other cycloaliphatic epoxy resins, use CIBA-GEIGY. Examples of suitable polyglycidyl ethers include CY175, CY177, and CY179 from CIBA-GEIGY AG, ERL-4234, ERL-4299, ERL-4221, and ERL-4206 from UCC, Showa Denko Shodyne 509 from Showa Denko K.K., Araldite CY-182, CY-192, and CY-184 from CIBA-GEIGY AG, Epiclon 200 and 400 from Dainippon Ink and Chemicals, Inc., Epicoat 871, 872, and EP1032H60 from Yuka Shell Epoxy Co., Ltd., and ED-5661 and ED-5662 from Celanese Coatings Co., Ltd.; and examples of aliphatic polyglycidyl ethers include Epicoat 190P and 191P from Yuka Shell Epoxy Co., Ltd., Epolite 100MF from Kyoeisha Yushi Chemical Industries Co., Ltd., and Epiol TMP from Nippon Oil & Fats Corporation.

[0140] For example, when the curable composition according to one embodiment is a solventless curable composition, the binder resin may be contained in an amount of 0.5 wt % to 10 wt %, for example, 1 wt % to 5 wt %, based on the total amount of the curable composition, which can improve the heat resistance and chemical resistance of the solventless curable composition and also improve the storage stability of the composition.

[0141] For example, when the curable composition according to one embodiment is a curable composition containing a solvent, the binder resin may be included in an amount of 1 wt % to 30 wt %, for example, 3 wt % to 20 wt %, based on the total amount of the curable composition, which can improve pattern characteristics, heat resistance, and chemical resistance.

[0142] Other additives To improve the stability and dispersibility of the quantum dots, the curable composition according to an embodiment may further include a polymerization inhibitor.

[0143] The polymerization inhibitor may include, but is not limited to, a hydroquinone-based compound, a catechol-based compound, or a combination thereof. When the curable composition according to an embodiment further includes the hydroquinone-based compound, the catechol-based compound, or a combination thereof, room temperature crosslinking can be prevented during exposure after printing (coating) the curable composition.

[0144] For example, the hydroquinone-based compound, the catechol-based compound, or a combination thereof may include, but is not necessarily limited to, hydroquinone, methylhydroquinone, methoxyhydroquinone, t-butylhydroquinone, 2,5-di-t-butylhydroquinone, 2,5-bis(1,1-dimethylbutyl)hydroquinone, 2,5-bis(1,1,3,3-tetramethylbutyl)hydroquinone, catechol, t-butylcatechol, 4-methoxyphenol, pyrogallol, 2,6-di-t-butyl-4-methylphenol, 2-naphthol, tris(N-hydroxy-N-nitrosophenylaminato-O,O')aluminum, or a combination thereof.

[0145] The hydroquinone-based compound, the catechol-based compound, or a combination thereof can be used in the form of a dispersion, and the polymerization inhibitor in the form of a dispersion may be contained in an amount of 0.001 wt % to 3 wt %, for example, 0.1 wt % to 2 wt %, based on the total amount of the curable composition. When the polymerization inhibitor is contained within the above range, it is possible to solve the problem of aging at room temperature and prevent sensitivity reduction and surface peeling.

[0146] In addition, the curable composition according to one embodiment may further include malonic acid; 3-amino-1,2-propanediol; a silane coupling agent; a leveling agent; a fluorine-based surfactant; or a combination thereof to improve heat resistance and reliability.

[0147] For example, the curable composition according to one embodiment may further include a silane coupling agent having a reactive substituent such as a vinyl group, a carboxyl group, a methacryloxy group, an isocyanate group, or an epoxy group to improve adhesion to a substrate.

[0148] Examples of the silane coupling agent include trimethoxysilylbenzoic acid, gamma methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, vinyltrimethoxysilane, gamma isocyanatepropyltriethoxysilane, gamma glycidoxypropyltrimethoxysilane, and beta epoxycyclohexylethyltrimethoxysilane, and these can be used alone or in combination of two or more.

[0149] The silane coupling agent may be contained in an amount of 0.01 to 10 parts by weight relative to 100 parts by weight of the curable composition. When the silane coupling agent is contained in the above range, the composition has excellent adhesion, storage stability, and the like.

[0150] In addition, the curable composition may further contain a surfactant, for example, a fluorine-based surfactant, if necessary, to improve coating properties and prevent the generation of defects, i.e., to improve leveling performance.

[0151] The fluorosurfactant may have a low weight-average molecular weight of 4,000 g / mol to 10,000 g / mol, specifically, a weight-average molecular weight of 6,000 g / mol to 10,000 g / mol. The fluorosurfactant may also 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 fluorosurfactant are within the above ranges, the leveling performance can be further improved, the occurrence of staining during high-speed coating can be prevented, and the occurrence of bubbles and film defects can be minimized, providing excellent properties for slit coating, a high-speed coating method.

[0152] Examples of the fluorine-based surfactant include BM-1000 (registered trademark) and BM-1100 (registered trademark) manufactured by BM Chemie; Megafac F 142D (registered trademark), Megafac F 172 (registered trademark), Megafac F 173 (registered trademark), Megafac F 174 (registered trademark) manufactured by Dainippon Ink and Chemicals, Inc.; Fluorad FC-135 (registered trademark), FC-170C (registered trademark), FC-430 (registered trademark), FC-431 (registered trademark), etc., from Sumitomo 3M Limited; Surflon S-112 (registered trademark), S-113 (registered trademark), S-131 (registered trademark), S-141 (registered trademark), S-145 (registered trademark), etc., from Asahi Glass Co., Ltd.; SH-28PA (registered trademark), S-190 (registered trademark), S-193 (registered trademark), SZ-6032 (registered trademark), SF-8428 (registered trademark), etc., from Toray Silicone Co., Ltd.; and commercially available fluorine-based surfactants such as F-482, F-484, F-478, and F-554 from DIC Corporation can be used.

[0153] In addition, the curable composition according to an embodiment may contain a silicone surfactant together with the fluorine-based surfactant. Specific examples of the silicone surfactant include, but are not limited to, TSF400, TSF401, TSF410, and TSF4440 manufactured by Toshiba Silicon Corporation.

[0154] The surfactant, including the fluorine-based 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. When the surfactant is included in the above range, the generation of foreign matter in the sprayed composition is reduced.

[0155] In addition, the curable composition according to an embodiment may further contain a certain amount of other additives such as an antioxidant within a range that does not impair the physical properties.

[0156] solvent Meanwhile, the curable composition according to an embodiment may further include a solvent.

[0157] Examples of the solvent include alcohols such as methanol and ethanol; glycol ethers such as ethylene glycol methyl ether, ethylene glycol ethyl ether, and propylene glycol methyl 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 monomethyl ether acetate and propylene glycol propyl ether acetate; 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, isobutyl acetate, etc.; lactic acid alkyl esters such as methyl lactate, ethyl lactate, etc.; hydroxyacetic acid alkyl esters such as methyl hydroxyacetate, ethyl hydroxyacetate, butyl hydroxyacetate, etc.; acetate alkoxyalkyl esters such as methoxymethyl acetate, methoxyethyl acetate, methoxybutyl acetate, ethoxymethyl acetate, ethoxyethyl acetate, etc.; 3-hydroxypropionic acid alkyl esters such as methyl 3-hydroxypropionate, ethyl 3-hydroxypropionate, etc.; 3-alkoxypropionic acid alkyl esters such as methyl 3-methoxypropionate, ethyl 3-methoxypropionate, ethyl 3-ethoxypropionate, methyl 3-ethoxypropionate, etc.; 2-hydroxypropionic acid alkyl esters such as methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, propyl 2-hydroxypropionate, etc.2-Alkoxypropionic acid alkyl esters such as methyl 2-methoxypropionate, ethyl 2-methoxypropionate, ethyl 2-ethoxypropionate, and methyl 2-ethoxypropionate; 2-hydroxy-2-methylpropionic acid alkyl esters such as methyl 2-hydroxy-2-methylpropionate and ethyl 2-hydroxy-2-methylpropionate; 2-alkoxy-2-methylpropionic acid alkyl esters such as methyl 2-methoxy-2-methylpropionate and ethyl 2-ethoxy-2-methylpropionate; 2-hydroxyethylpropionate, 2-hydroxy-2-methylethylpropionate, hydroxyethyl acetate, and methyl 2-hydroxy-3-methylpropionate. or ketone acid esters such as ethyl pyruvate, and also include, but are not limited to, N-methylformamide, N,N-dimethylformamide, N-methylformanilide, N-methylacetamide, N,N-dimethylacetamide, N-methylpyrrolidone, dimethyl sulfoxide, benzyl ethyl ether, dihexyl ether, acetylacetone, isophorone, caproic acid, caprylic acid, 1-octanol, 1-nonanol, benzyl alcohol, benzyl acetate, ethyl benzoate, diethyl oxalate, diethyl maleate, gamma-butyrolactone, ethylene carbonate, propylene carbonate, phenyl cellosolve acetate, and the like;

[0158] For example, the solvent may preferably be a glycol ether such as ethylene glycol monoethyl ether or ethylene diglycol methyl ethyl ether; an ethylene glycol alkyl ether acetate such as ethyl cellosolve acetate; an ester such as ethyl 2-hydroxypropionate; a carbitol such as diethylene glycol monomethyl ether; a propylene glycol alkyl ether acetate such as propylene glycol monomethyl ether acetate or propylene glycol propyl ether acetate; an alcohol such as ethanol, or a combination thereof.

[0159] For example, the solvent may be a polar solvent including propylene glycol monomethyl ether acetate, dipropylene glycol methyl ether acetate, ethanol, ethylene glycol dimethyl ether, ethylene diglycol methyl ethyl ether, diethylene glycol dimethyl ether, 2-butoxyethanol, N-methylpyrrolidine, N-ethylpyrrolidine, propylene carbonate, gamma-butyrolactone, or a combination thereof.

[0160] The solvent may be included in an amount of 40 wt % to 80 wt %, for example, 45 wt % to 80 wt %, based on the total amount of the curable composition. When the solvent is included in this range, the solvent-based curable composition has an appropriate viscosity, thereby providing excellent coatability during spin coating and large-area coating using a slit.

[0161] Another embodiment provides the curable composition, for example, a cured film produced using the curable composition, a color filter including the cured film, and a display device including the color filter.

[0162] One method for preparing the cured film includes the steps of: applying the curable composition onto a substrate by inkjet spraying to form a pattern (S1); and curing the pattern (S2).

[0163] (S1) Pattern formation stage The curable composition is preferably applied to a substrate in a thickness of 0.5 to 20 μm by an inkjet dispersion method. In the inkjet spraying, a single color can be sprayed from each nozzle, and a pattern can be formed by repeatedly spraying the required number of colors. Alternatively, to reduce the number of processes, a pattern can be formed by simultaneously spraying the required number of colors from each inkjet nozzle.

[0164] (S2) Hardening stage The resulting pattern can be cured to obtain pixels. The curing method can be either a thermal curing process or a photocuring process. The thermal curing process preferably involves heating at a temperature of 100°C or higher, more preferably between 100°C and 300°C, and even more preferably between 160°C and 250°C. The photocuring process involves irradiating actinic radiation, such as UV light, with a wavelength of 190nm to 450nm, e.g., 200nm to 500nm. Examples of light sources used for irradiation include low-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, metal halide lamps, and argon gas lasers. X-rays and electron beams can also be used in some cases.

[0165] Another method for producing the cured film is to produce a cured film using the curable composition by a lithography method, and the production method is as follows.

[0166] (1) Coating and film formation stage The curable composition is applied to a substrate that has been subjected to a predetermined pretreatment in a desired thickness, for example, 2 μm to 10 μm, using a method such as spin or slit coating, roll coating, screen printing, or applicator, and then heated at a temperature of 70°C to 90°C for 1 minute to 10 minutes to remove the solvent, thereby forming a coating film.

[0167] (2) Exposure stage The resulting coating film is then exposed to actinic radiation such as UV light of 190 to 450 nm, for example, 200 to 500 nm, through a mask of a predetermined shape to form a desired pattern. Examples of light sources used for irradiation include low-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, metal halide lamps, and argon gas lasers, and in some cases, X-rays and electron beams can also be used.

[0168] The exposure dose varies depending on the type and amount of each component of the curable composition and the thickness of the dried film. For example, when a high-pressure mercury lamp is used, the exposure dose is 500 mJ / cm 2The following is based on a 365nm sensor:

[0169] (3) Development stage Following the exposure step, an alkaline aqueous solution is used as a developer to dissolve and remove unnecessary portions, leaving only the exposed portions to form an image pattern. That is, when developed with an alkaline developer, the unexposed portions are dissolved, forming an image color filter pattern.

[0170] (4) Post-processing stage The image pattern obtained by the development can be cured by heating again or by irradiating with actinic radiation in order to obtain a pattern that is excellent in heat resistance, light resistance, adhesion, crack resistance, chemical resistance, high strength, storage stability, etc.

[0171] Preferred examples of the present invention will be described below, but the following examples are merely preferred examples of the present invention and the present invention is not limited to these examples. [Example]

[0172] (Fabrication of surface-modified quantum dots) Manufacturing example A magnetic bar is placed in a three-necked round-bottom flask and a green quantum dot dispersion solution (InP / ZnSe / ZnS, Hansol Chemical; quantum dot solids content 23% by weight) is added. A compound (ligand) represented by the following chemical formula Q is then added and stirred at 80°C in a nitrogen atmosphere. After the reaction is complete, the mixture is cooled to room temperature (23°C) and the quantum dot reaction solution is added to cyclohexane to collect the precipitate. The precipitate and cyclohexane are separated by centrifugation, and the precipitate is thoroughly dried in a vacuum oven for one day to obtain surface-modified quantum dots.

[0173] (*Synthesis of the compound represented by the chemical formula Q: 100g of PH-4 (Hannong Chemical) is placed in a two-necked round-bottom flask and thoroughly dissolved in 300mL of THF. 15.4g of NaOH and 100mL of water are added at 0℃ and thoroughly dissolved until a clear solution is obtained. A solution of 73g of para-toluene sulfonic chloride dissolved in 100mL of THF is slowly added at 0℃. The addition is continued for 1 hour, and then the mixture is stirred at room temperature for 12 hours. After the reaction is complete, an excess of methylene chloride is added and stirred, followed by extraction with saturated NaHCO3 solution, titration, and water removal. After removing the solvent, the mixture is dried in a dry oven for 24 hours. 50g of the resulting dried product is placed in a two-necked round-bottom flask and thoroughly stirred in 300mL of ethanol. 27g of Thiourea is then added and dispersed, and the mixture is refluxed at 80℃ for 12 hours. An aqueous solution of 4.4g of NaOH dissolved in 20mL of water is then added and stirred for 5 hours, while the excess of methylene chloride is removed. After adding chloride and stirring, add aqueous hydrochloric acid solution, extract, titrate, remove water, and remove solvent in sequence. Dry in a vacuum oven for 24 hours to obtain the compound represented by the following chemical formula Q.

[0174] [ka]

[0175] (Curable composition production) Curable compositions according to Examples 1 to 9 and Comparative Examples 1 to 6 were produced based on the following components.

[0176] (A) Quantum dots Surface-modified green quantum dots produced from the above preparation examples (B) Polymerizable compound (B-1) A compound represented by the following chemical formula 1-1 (viscosity: 4.3 cPs, vapor pressure: 2.9 × 10 -3 torr)

[0177] [ka]

[0178] (B-2) A compound represented by the following chemical formula 1-2 (viscosity: 5.5 cPs, vapor pressure: 1 × 10 -3 torr)

[0179] [ka]

[0180] (B-3) A compound represented by the following chemical formula 1-3 (viscosity: 6.15 cPs, vapor pressure: 3.6 × 10 -4 torr)

[0181] [ka]

[0182] (B-4) A compound represented by the following chemical formula 1-4 (viscosity: 3.9 cPs, vapor pressure: 3 × 10 -3 torr)

[0183] [ka]

[0184] (B-5) A compound represented by the following chemical formula 1-5 (viscosity: 4.5 cPs, vapor pressure: 1.9 × 10 -3 torr)

[0185] [ka]

[0186] (B-6) A compound represented by the following chemical formula 1-6 (viscosity: 5.3 cPs, vapor pressure: 1.2 × 10 -3 torr)

[0187] [ka]

[0188] (B-7) A compound represented by the following chemical formula 1-7 (viscosity: 4.1 cPs, vapor pressure: 7.8 × 10 -4 torr)

[0189] [ka]

[0190] (B-8) A compound represented by the following chemical formula 1-8 (viscosity: 5.4 cPs, vapor pressure: 9.5 × 10 -5 torr)

[0191] [ka]

[0192] (B-9) A compound represented by the following chemical formula 1-9 (viscosity: 6.1 cPs, vapor pressure: 5 × 10 -6 torr)

[0193] [ka]

[0194] (B-10) A compound represented by the following chemical formula C-1 (viscosity: 6.2 cPs, vapor pressure: 1 × 10 -3 torr)

[0195] [ka]

[0196] (B-11) A compound represented by the following chemical formula C-2 (viscosity: 4.5 cPs, vapor pressure: 8 × 10 -3 torr)

[0197] [ka]

[0198] (B-12) The compound represented by the following chemical formula C-3 (viscosity: 5.4 cPs, vapor pressure: 2.85 × 10 -3 torr)

[0199] [ka]

[0200] (B-13) The compound represented by the following chemical formula C-4 (viscosity: 4.45 cPs, vapor pressure: 1.85 × 10 -3 torr)

[0201] [ka]

[0202] (B-14) The compound represented by the following chemical formula C-5 (viscosity: 5.27 cPs, vapor pressure: 3.7 × 10 -4 torr)

[0203] [ka]

[0204] (B-15) The compound represented by the following chemical formula C-6 (viscosity: 6.4 cPs, vapor pressure: 1.3 × 10 -4 torr)

[0205] [ka]

[0206] (C) Photopolymerization initiator TPO-L (Polynetron) (D) Light diffusing agent Titanium dioxide dispersion (rutile type TiO2; D50 (180nm)) (E) Polymerization inhibitor Methylhydroquinone (TOKYO CHEMICAL) Examples 1 to 9, Comparative Examples 1 to 3, and Reference Examples 1 to 3 Specifically, the surface-modified quantum dots obtained in the above preparation example were mixed with the curable monomer in the same weight ratio and stirred for 12 hours. A polymerization inhibitor was added and stirred for 5 minutes. Next, a photoinitiator was added, followed by a light diffusing agent.

[0207] (For example, in the case of Example 1, 40 g of surface-modified green quantum dots and 40 g of the compound represented by Chemical Formula 1-1 as a curable monomer are mixed and stirred to prepare a quantum dot dispersion, and then 12.5 g of another curable monomer represented by Chemical Formula 1-1 and 0.5 g of a polymerization inhibitor are added thereto and stirred for 5 minutes, and then 3 g of a photoinitiator and 4 g of a light diffusing agent are added thereto and stirred to prepare a curable composition.) The specific compositions are shown in Tables 1 and 2 below.

[0208] [Table 1]

[0209] [Table 2]

[0210] Evaluation 1: Ink viscosity and volatility evaluation The viscosity of each of the curable compositions prepared in Examples 1 to 9, Comparative Examples 1 to 3, and Reference Examples 1 to 3 was measured at 25°C using a viscometer (Brookfield DV-II, RV-2 spindle, 23 rpm), and the results are shown in Table 3 below. Each of the curable compositions was ink-jetted into a pixel having a partition wall, and after 1 hour, the reduction in the thickness of the single film was measured using a 3D optical microscope (KEYENCE, VK-9710 color 3D laser microscope), and the film retention rate was calculated, and the results are shown in Table 3 below. In Table 3 below, a higher film retention rate indicates lower volatility.

[0211] [Table 3]

[0212] From Table 3 above, it can be seen that the curable compositions according to Examples 1 to 9, Reference Examples 1 to 3, and Comparative Examples 1 to 3 all have low viscosities, but when comparing curable compositions having similar viscosity values, the curable compositions according to Examples 1 to 9 have higher film retention rates than the curable compositions according to Reference Examples 1 to 3 and Comparative Examples 1 to 3, and therefore have further improved volatility. In other words, it can be seen that the curable composition according to one embodiment has low viscosity and at the same time improved volatility.

[0213] The present invention is not limited to the above-described embodiments, and can be manufactured in various different forms, and those skilled in the art will understand that the present invention can be embodied in other specific forms without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not limiting.

Claims

1. (A) quantum dots; and (B) Viscosity is less than 6.2 cps and vapor pressure is less than 1×10 －６ torr ~ 3 × 10 －３ torr curable monomer Including, The curable monomer is a curable composition (excluding those containing luminescent nanoparticles containing polyamine silicon ligands) represented by the following chemical formula 1: 【Chemistry 1】 In the above chemical formula 1, R ａ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, L ａ is an unsubstituted alkylene group having 1 to 8 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by the following chemical formula 2: 【Chemistry 2】 In the above chemical formula 2, L ｂ and L ｃ are each independently a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, n is an integer of 1 to 3.

2. The curable composition of claim 1 , wherein the curable monomer has a viscosity of 3 cps or greater and less than 6.2 cps.

3. In Formula 1, L ａ is an unsubstituted alkylene group having 1 to 8 carbon atoms, an unsubstituted cycloalkylene group having 3 to 6 carbon atoms, or a linking group represented by Chemical Formula 2 above, In the above formula 2, L ｂ and L ｃ and each independently represents an unsubstituted alkylene group having 1 to 6 carbon atoms.

4. The curable composition according to claim 1, wherein the curable monomer is represented by any one of the following formulas 1-1 to 1-9. 【Transformation 3】

5. The curable composition according to claim 1 , wherein the quantum dots are surface-modified with a ligand having a polar group.

6. The curable composition according to claim 5, wherein the ligand having a polar group is represented by any one of the following chemical formulas 3 to 16: 【Chemistry 4】 In the above chemical formulas 3 to 8, R １ ~R ７ each independently represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, L １ ~L １６ are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n1 to n7 each independently represent an integer of 0 to 10, 【Transformation 5】 In the above chemical formulas 9 to 11, R ８ and R ９ are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L １７ ~L ２３ are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n8 to n10 each independently represent an integer from 0 to 10, 【Transformation 6】 In the above chemical formulas 12 to 15, R １０ ~R １５ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L ２４ ~L ２９ are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n11 to n16 each independently represent an integer of 0 to 10, 【Transformation 7】 In the above chemical formula 16, R １６ ~R １８ are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, L ３０ ~L ３２ are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, n17 to n19 each independently represent an integer of 0 to 10.

7. The curable composition according to claim 1 , wherein the curable composition is a solventless curable composition.

8. The solvent-free curable composition contains, relative to the total amount of the solvent-free curable composition, 5% to 60% by weight of the quantum dots; and 40% by weight to 95% by weight of the curable monomer The solventless curable composition of claim 7, comprising:

9. The curable composition of claim 1 , further comprising a polymerization initiator, a light diffusing agent, a polymerization inhibitor, or a combination thereof.

10. 10. The hardenable composition of claim 9, wherein the light diffuser comprises barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.

11. The curable composition of claim 1 , further comprising a solvent.

12. 12. The curable composition of claim 11, wherein the curable composition comprises, based on the total weight of the curable composition, 1% to 40% by weight of the quantum dots; 1% to 20% by weight of the curable monomer; and 40% to 80% by weight of the solvent.

13. The curable composition of claim 1, further comprising: malonic acid; 3-amino-1,2-propanediol; a silane coupling agent; a leveling agent; a fluorosurfactant; or a combination thereof.

14. A cured film produced using the curable composition according to any one of claims 1 to 13.

15. A color filter comprising the cured film of claim 14.

16. A display device comprising the color filter of claim 15.

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