Light-converting curable composition, cured film comprising light-converting curable composition, and image display device comprising cured film

Abstract

The present invention relates to a light-converting curable composition comprising: quantum dots; a photopolymerizable monomer comprising a bifunctional monomer and a monofunctional monomer; a photopolymerizable initiator; and scattering particles, wherein the light-converting curable composition necessarily comprises a monofunctional photopolymerizable monomer having a refractive index of at least 1.50.

Description

A photo-converting curable composition, a cured film comprising the photo-converting curable composition, and an image display device comprising the cured film.

[0001] The present invention relates to a photo-converting curable composition, a cured film comprising the photo-converting curable composition, and an image display device comprising the cured film. More specifically, the invention relates to a photo-converting curable composition that exhibits excellent color conversion efficiency by including a photopolymerizable monomer comprising a quantum dot, a difunctional monomer, and a monofunctional monomer, a cured film comprising the photo-converting curable composition, and an image display device comprising the cured film.

[0002] Quantum dots are nanometer-sized semiconductor nanocrystals, and depending on their size and shape, the energy band gap (Bandgap, E g These quantum dots have the characteristic of changing. Due to the quantum confinement effect, the emission wavelength can be controlled solely by adjusting the size of the quantum dots, and they can exhibit excellent color purity and high photoluminescence (PL) efficiency. As such, they are receiving a lot of attention not only in displays but also in fields such as lighting sources, solar cells, semiconductor lasers / optical amplifiers, and bioimaging.

[0003] Meanwhile, color filters are used in liquid crystal displays, optical filters for cameras, etc., and are manufactured by coating fine areas colored with three or more colors onto a solid-state imaging element or a transparent substrate. Such colored thin films can typically be formed by dyeing, printing, pigment dispersion, inkjet methods, etc.

[0004] Among these, the pigment dispersion method is a method for forming a colored thin film by repeating a series of processes involving coating, exposing, developing, and heat-curing a photopolymerizable composition containing a coloring agent onto a transparent substrate provided with a black matrix. For example, Korean Patent Publication No. 1992-7002502 proposes a method for manufacturing a colored photosensitive resin composition using the pigment dispersion method. However, the above method requires coating, exposure, development, and curing processes for red, green, and blue, respectively, to form pixels; consequently, the manufacturing process becomes very lengthy, and yield management is difficult due to the large number of control factors between processes.

[0005] In addition, regarding this, Korean Published Patent Application No. 10-2016-0061382 discloses a composition comprising quantum dots and photopolymerizable monomers, but does not disclose a composition exhibiting excellent color conversion efficiency.

[0006] Against this backdrop, the inventors conducted repeated research to develop a photocurable composition having excellent color conversion efficiency, and discovered that the above effect could be dramatically improved by including a high-refractive index photopolymerizable monomer in the photocurable composition, thereby completing the present invention.

[0007] [Prior Art Literature]

[0008] [Patent Literature]

[0009] (Patent Document 1) Korean Published Patent No. 1992-7002502

[0010] (Patent Document 2) Korean Published Patent No. 10-2016-0061382

[0011] To solve the aforementioned problems, one objective of the present invention is to provide a photo-converting curable composition having excellent color conversion efficiency (PCE) and color purity.

[0012] Another exemplary objective of the present invention is to provide a curable film and an image display device comprising the above-mentioned curable composition.

[0013] The technical problems to be solved according to the technical concept of the invention disclosed in this specification are not limited to those for solving the problems mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below.

[0014] As an embodiment for achieving the above objective, one example of the present invention is

[0015] A photopolymerizable monomer comprising quantum dots, a difunctional monomer and a monofunctional monomer; a photopolymerizable initiator; and scattering particles, and a photopolymerizable monomer having a refractive index of 1.50 or higher, and a photoconverting curable composition are provided.

[0016] The full width at half maximum (FWHM) of the above photo-converting curable composition may be 30 nm to 40 nm.

[0017] The maximum emission wavelength of the above photo-converting curable composition may be 520 nm to 560 nm.

[0018] The maximum emission wavelength of the above photo-converting curable composition may be 580 nm to 700 nm.

[0019] The above quantum dots may further include a ligand layer on the surface.

[0020] The above quantum dots may include InP, CdSe, AgInGaS, ZnSeTe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, ZnSeSTe, HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof. there is.

[0021] The above photo-converting curable composition may further include one or more antioxidants selected from phosphorus-based antioxidants, phenolic-based antioxidants, and sulfur-based antioxidants.

[0022] The above difunctional monomer may be a compound represented by the following chemical formula 1.

[0023] [Chemical Formula 1]

[0024]

[0025] In the above chemical formula 1,

[0026] R1 and R2 are each independently hydrogen or a C1-C6 alkyl group, and

[0027] A1 and A2 are each independently O or CH2, and

[0028] n is an integer from 0 to 12.

[0029] The above monofunctional monomer may be a compound represented by the following chemical formula 2.

[0030] [Chemical Formula 2]

[0031]

[0032] In the above chemical formula 2,

[0033] R3 is hydrogen or a C1-C6 alkyl group, and

[0034] R4 is hydrogen, a C1–C6 alkyl group, and a C6–C 30 aryl groups, heteroaryl groups having 5 to 30 nuclei, and C6~C 30 Selected from the group consisting of aryloxy groups, or combined with adjacent groups to form a condensation ring,

[0035] A3 is O, S or N(R5), and

[0036] A4 is O, S or N(R6), and

[0037] The above R5 and R6 are each independently hydrogen or a C1-C6 alkyl group, and

[0038] m is an integer from 0 to 4.

[0039] The compound represented by the above chemical formula 1 may be a compound represented by any one of the following chemical formulas 1-1 to 1-3.

[0040] [Chemical Formula 1-1]

[0041]

[0042] [Chemical Formula 1-2]

[0043]

[0044] [Chemical Formula 1-3]

[0045]

[0046] The above monofunctional monomer may be a compound represented by the following chemical formula 2.

[0047] [Chemical Formula 2]

[0048]

[0049] In the above chemical formula 2,

[0050] R3 is hydrogen or a C1-C6 alkyl group, and

[0051] R4 is hydrogen, a C1–C6 alkyl group, and a C6–C 30 aryl groups, heteroaryl groups having 5 to 30 nuclei, and C6~C 30 Selected from the group consisting of aryloxy groups, or combined with adjacent groups to form a condensation ring,

[0052] A3 is O, S or N(R5), and

[0053] A4 is O, S or N(R6), and

[0054] The above R5 and R6 are each independently hydrogen or a C1-C6 alkyl group, and

[0055] m is an integer from 0 to 4.

[0056] The compound represented by the above chemical formula 2 may be a compound represented by any one of the following chemical formulas 2-1 to 2-7.

[0057] [Chemical Formula 2-1]

[0058]

[0059] [Chemical Formula 2-2]

[0060]

[0061] [Chemical Formula 2-3]

[0062]

[0063] [Chemical Formula 2-4]

[0064]

[0065] [Chemical Formula 2-5]

[0066]

[0067] [Chemical Formula 2-6]

[0068]

[0069] [Chemical Formula 2-7]

[0070]

[0071] Based on the total weight of the photo-converting curable composition, the content of the quantum dots may be 1 to 30 weight%, the content of the difunctional monomer may be 5 to 80 weight%, the content of the monofunctional monomer may be 20 to 70 weight%, the content of the photopolymerization initiator may be 0.1 to 2 weight%, and the content of the scattering particles may be 0.5 to 10 weight%.

[0072] Another example of the present invention provides a curable film comprising the above-mentioned curable composition.

[0073] Another example of the present invention provides an image display device comprising the above-mentioned hardened film.

[0074] A photocurable composition according to one embodiment of the present invention can exhibit excellent color conversion efficiency (PCE) and color purity by including a photopolymerizable monomer comprising a difunctional monomer and a monofunctional monomer in quantum dots.

[0075] However, the effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art to which the present disclosure pertains (referred to as "person skilled in the art") from the description in the claims.

[0076] The present invention will be described in detail as follows.

[0077] Meanwhile, each description and embodiment disclosed in this application may also be applied to other descriptions and embodiments. That is, all combinations of the various elements disclosed in this application fall within the scope of this application. Furthermore, the scope of this application should not be considered limited by the specific descriptions provided below.

[0078] Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0079] In this specification, expressions such as "comprising" should be understood as open-ended terms implying the possibility of including other embodiments.

[0080] In this specification, "preferred" and "preferably" refer to embodiments of the invention that may provide certain advantages under certain conditions. However, other embodiments may also be preferred under the same or different conditions. Additionally, the mention of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

[0081] In this specification, when a part such as a layer, film, region, plate, etc. is described as being "on" or "above" another part, this includes not only cases where it is directly above another part but also cases where there is another part in between, and does not necessarily mean that it is located above with respect to the direction of gravity.

[0082] In this specification, singular expressions include plural expressions unless the context clearly indicates that they are singular. Additionally, plural expressions include singular expressions unless the context clearly indicates that they are plural.

[0083]

[0084] Unless otherwise defined in this specification, "color conversion efficiency (PCE)" refers to the ratio of energy converted into green or red and emitted to energy absorbed by a light-converting coating layer (or color filter) of irradiated blue light, and can be expressed by the following mathematical formula 1.

[0085] [Mathematical Formula 1]

[0086] Color conversion efficiency (%) =

[0087] Unless otherwise defined in this specification, "Full width at half maximum (FWHM)" refers to the difference between wavelengths having an emission intensity value corresponding to half of the maximum emission intensity on the emission spectrum, and the narrower the full width at half maximum, the higher the color purity can be achieved.

[0088] In this specification, "functional group" means (meth)acrylate group.

[0089]

[0090] 1. Photoconversion curable composition

[0091] According to one embodiment of the present invention, a photopolymerizable composition is provided comprising: quantum dots; a photopolymerizable monomer comprising a difunctional monomer and a monofunctional monomer; a photopolymerizable initiator; and scattering particles, wherein the photopolymerizable monomer has a refractive index of 1.50 or higher.

[0092] As a result of repeated research on a photocurable composition capable of exhibiting excellent color conversion efficiency, the inventors discovered that when the photocurable composition includes a photopolymerizable monomer with a refractive index of 1.50 or higher, it exhibits excellent color conversion efficiency.

[0093] Preferably, the refractive index of the high-refractive index photopolymerizable monomer may be 1.50 or higher, 1.51 or higher, 1.52 or higher, more preferably 1.53 or higher, 1.54 or higher, and most preferably 1.55 or higher.

[0094] Accordingly, in particular, the color conversion efficiency (PCE) of the photo-converting curable composition may be 38% or more, preferably 39% or more, and more preferably 40% or more.

[0095]

[0096] The above photo-converting curable composition may be a photo-converting ink composition or a photo-converting resin composition, and the photo-converting curable composition according to one embodiment of the present invention may be a solvent-free type that does not contain a solvent in terms of continuous processability. The quantum dot and ink compositions have high dispersibility and viscosity stability, making them suitable for use in a continuous process based on an inkjet method.

[0097] The method for preparing a photo-converting curable composition according to one embodiment of the present invention is not particularly limited, and known methods generally used in the art may be used.

[0098] The photo-converting curable composition prepared in this way can be used to manufacture curable films such as color filters and photo-converting laminated substrates, and image display devices containing the same.

[0099]

[0100] Hereinafter, the respective compositions and technical advantages of the photo-converting curable composition according to one embodiment of the present invention will be described in detail.

[0101]

[0102] [Quantum Dot]

[0103] In the present invention, the term "quantum dot" refers to a nanocrystal exhibiting quantum confinement or exciton confinement and is a type of luminescent nanostructure (e.g., capable of emitting light upon energy excitation). The shape of the term quantum dot is not limited unless specifically defined otherwise.

[0104] The above nanostructure refers to a structure having a single region or characteristic dimensions having nanoscale dimensions. The above nanostructure may have any shape, such as a nanowire, nanorod, nanotube, multi-pod type shape having two or more pods, nanodot (or quantum dot), etc., and is not particularly limited.

[0105] The electrical and / or optical properties of the quantum dots of the present invention may vary depending on their properties (e.g., composition, size, and / or shape). For example, quantum dots may have a large surface area per unit volume, exhibit quantum confinement effects, and exhibit properties different from those of bulk materials of the same composition.

[0106] In the present invention, the type of quantum dot is not particularly limited and includes all known or commercially available quantum dots.

[0107] In one embodiment of the present invention, the quantum dots are InP, CdSe, AgInGaS, ZnSeTe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, ZnSeSTe, HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, It can be selected from the group consisting of HgZnSTe and mixtures thereof.

[0108]

[0109] In addition, the photo-converting curable composition according to one embodiment of the present invention includes the quantum dots, so that the full width at half maximum (FWHM) may be 30 nm to 40 nm, thereby exhibiting excellent color purity.

[0110] In addition, the photo-converting curable composition according to one embodiment of the present invention may include the quantum dots, and depending on the type of color emitted, the maximum emission wavelength may be 520 to 560 nm, or the maximum emission wavelength may be 580 nm to 700 nm. For example, it may emit green light with a maximum emission wavelength of 520 to 560 nm, and may emit red light with a maximum emission wavelength of 580 nm to 700 nm.

[0111]

[0112] The above quantum dots may have a homogeneous single structure; a dual structure such as a core-shell structure and a gradient structure; or a mixed structure thereof. In the present invention, the type of quantum dots is not specifically limited as long as they can emit light when stimulated by light, but preferably, the quantum dots may have a core-shell structure including a core and a shell covering the core.

[0113]

[0114] The content of the quantum dots may be 1 to 30 weight% based on the total weight of the photo-converting curable composition. Preferably, the content of the quantum dots may be 10 weight% or more, more preferably 20 weight% or more, and even more preferably 30 weight% or less. When the quantum dots are included within the above range, the photo-conversion efficiency is excellent, and excellent processability can be achieved without impairing pattern characteristics and development characteristics.

[0115]

[0116] [Photopolymerizable Monomer]

[0117] A photo-converting curable composition according to one embodiment of the present invention comprises a photopolymerizable monomer comprising a difunctional monomer and a monofunctional monomer. In this specification, the functional group refers to a (meth)acrylate group.

[0118] The above photopolymerizable monomer acts to improve the dispersibility of quantum dots.

[0119]

[0120] Commonly used photopolymerizable monomers include monofunctional monomers, difunctional monomers, and other polyfunctional monomers.

[0121] Examples of the above monofunctional monomers include nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexylcarbitol acrylate, 2-hydroxyethyl acrylate, etc.

[0122] Examples of the above-mentioned difunctional monomers include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, dineopentyl glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, bis(acryloyloxyethyl)ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, etc.

[0123] Examples of the above-mentioned polyfunctional monomers include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, propoxylated dipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc.

[0124] As a result of repeated research on photopolymerizable monomers that exhibit excellent color conversion efficiency when combined with quantum dots and included in a photocurable composition, the inventors discovered that the optimal combination is to include both difunctional monomers and monofunctional monomers as photopolymerizable monomers.

[0125] The refractive index of the above monofunctional monomer may be 1.50 or higher.

[0126] As a result of repeated research to find a combination capable of exhibiting the best color conversion efficiency among various possible cases of the difunctional monomer and monofunctional monomer, the inventors discovered that the color conversion efficiency of the photo-converting curable composition becomes even better when the refractive index of the monofunctional monomer is sufficiently high at 1.50 or higher. In particular, they discovered that even if the refractive index of the photo-converting curable composition is 1.50 or higher, the color conversion efficiency is even better when the refractive index of the monofunctional monomer is sufficiently high at 1.50 or higher. This can be explained by the fact that when the refractive index is low, total internal reflection occurs due to the difference in refractive index at the interface of each layer, causing light to be trapped and unable to be emitted to the outside; however, when a material with a high refractive index is applied, the difference in refractive index between the layers decreases, thereby reducing total internal reflection and increasing the amount of light emitted to the outside.

[0127] Preferably, the refractive index of the monofunctional monomer may be 1.50, 1.51, 1.52, 1.53, 1.54, or 1.55 or higher.

[0128] Ultimately, the photo-converting curable composition according to one embodiment of the present invention is as described above

[0129] By including a photopolymerizable monomer comprising quantum dots, a difunctional monomer, and a monofunctional monomer with a refractive index of 1.50 or higher, the color conversion efficiency can be 38% or higher, preferably 39% or higher, and more preferably 40% or higher.

[0130]

[0131] Preferably, the difunctional monomer may be a compound represented by the following chemical formula 1.

[0132] [Chemical Formula 1]

[0133]

[0134] In the above chemical formula 1,

[0135] R1 and R2 are each independently hydrogen or a C1-C6 alkyl group, and

[0136] A1 and A2 are each independently O or CH2, and

[0137] n is an integer from 0 to 12.

[0138] Preferably, the monofunctional monomer may be a compound represented by the following chemical formula 2.

[0139] [Chemical Formula 2]

[0140]

[0141] In the above chemical formula 2,

[0142] R3 is hydrogen or a C1-C6 alkyl group, and

[0143] R4 is hydrogen, a C1–C6 alkyl group, and a C6–C 30 aryl groups, heteroaryl groups with 5 to 30 nuclei, and C6~C 30 Selected from the group consisting of aryloxy groups, or combined with adjacent groups to form a condensation ring,

[0144] A3 is O, S or N(R5), and

[0145] A4 is O, S or N(R6), and

[0146] The above R5 and R6 are each independently hydrogen or a C1-C6 alkyl group, and

[0147] m is an integer from 0 to 4.

[0148]

[0149] In this specification, "C1-C6 alkyl group" means a straight-chain or branched monovalent hydrocarbon having 1 to 6 carbon atoms, and may be, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, but is not limited thereto.

[0150] In this specification, "C6~C 30The term "aryl group" refers to a monovalent substituent derived from an aromatic hydrocarbon having 6 to 30 carbon atoms, consisting of a single ring or a combination of two or more rings. Additionally, it may include a monovalent substituent in which two or more rings are condensed together, containing only carbon as the ring-forming atom, and the entire molecule is non-aromatic. Examples of such aryl groups include, but are not limited to, phenyl, naphthyl, phenanthryl, anthryl, and fluorenyl.

[0151] In this specification, "heteroaryl group having 5 to 30 nuclei" refers to a monovalent substituent derived from a monoheterocyclic or polyheterocyclic aromatic hydrocarbon having 5 to 30 nuclei. In this case, one or more carbons in the ring, preferably 1 to 3 carbons, may be substituted with heteroatoms selected from N, O, P, S, and Se. Additionally, it is interpreted to include a monovalent group in which two or more rings are simply penant or condensed together, and, in addition to carbons, include heteroatoms selected from N, O, P, S, and Se as ring-forming atoms, and the entire molecule has non-aromacity. Examples of such heteroaryl groups include 6-membered monocyclic rings such as pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, and triazinyl; Polycyclic rings such as phenoxathienyl, indolizinyl, indolyl, purinyl, quinolyl, benzothiazole, and carbazolyl; 2-furanyl, N-imidazolyl, 2-isoxazolyl, 2-pyridinyl, 2-pyrimidinyl, etc., but are not limited thereto.

[0152] In this specification, "C6~C 30The aryloxy group of is a monovalent substituent represented by RO-, where R means an aryl having 6 to 30 carbon atoms. Examples of such aryloxy groups include, but are not limited to, phenyloxy, naphthyloxy, and diphenyloxy.

[0153]

[0154] More specifically, the above R4 may be the following example compound.

[0155]

[0156] According to one embodiment of the present invention, the compound represented by Chemical Formula 1 may be a compound represented by any one of the following Chemical Formulas 1-1 to 1-3. However, it is not limited thereto.

[0157] [Chemical Formula 1-1]

[0158]

[0159] [Chemical Formula 1-2]

[0160]

[0161] [Chemical Formula 1-3]

[0162]

[0163] According to one embodiment of the present invention, the compound represented by Chemical Formula 2 may be a compound represented by any one of the following Chemical Formulas 2-1 to 2-7. However, it is not limited thereto.

[0164] [Chemical Formula 2-1]

[0165]

[0166] [Chemical Formula 2-2]

[0167]

[0168] [Chemical Formula 2-3]

[0169]

[0170] [Chemical Formula 2-4]

[0171]

[0172] [Chemical Formula 2-5]

[0173]

[0174] [Chemical Formula 2-6]

[0175]

[0176] [Chemical Formula 2-7]

[0177]

[0178] The content of the above difunctional monomer may be 5 to 80 wt%, 5 to 75 wt%, 5 to 70 wt%, 5 to 65 wt%, 5 to 60 wt%, 5 to 55 wt%, 5 to 50 wt%, 5 to 45 wt%, 5 to 40 wt%, 5 to 35 wt%, 5 to 30 wt%, 10 to 80 wt%, 10 to 75 wt%, 10 to 70 wt%, 10 to 65 wt%, 10 to 60 wt%, 10 to 55 wt%, 10 to 50 wt%, 10 to 45 wt%, 10 to 40 wt%, 10 to 35 wt%, and 10 to 30 wt%, based on the total weight of the above photo-converting curable composition. If the content of the above-mentioned difunctional monomer is less than 5 weight%, a problem may arise in which the rigidity of the thin film may be lowered due to a decrease in crosslinking density, and if the content of the above-mentioned difunctional monomer is more than 80 weight%, a problem may arise in which the shrinkage rate increases and the surface resistance decreases during photocuring.

[0179] The content of the monofunctional monomer may be 20 to 70 wt%, 20 to 65 wt%, 20 to 60 wt%, 20 to 55 wt%, 25 to 70 wt%, 25 to 65 wt%, 25 to 60 wt%, 25 to 55 wt%, 30 to 70 wt%, 30 to 65 wt%, 30 to 60 wt%, and 30 to 55 wt% based on the total weight of the photo-converting curable composition, and preferably 20 to 60 wt%, more preferably 25 to 60 wt%. If the content of the monofunctional monomer is less than 20 weight%, the color conversion efficiency may decrease and the crosslinking rate may decrease, and if the content of the monofunctional monomer is more than 60 weight%, the crosslinking density after photocuring decreases, which may cause problems such as reduced durability of the thin film.

[0180]

[0181] In the present invention, the curable composition of the comparative example may include one or more of the photopolymerizable monomers represented by the following chemical formulas 3 and 4.

[0182] [Chemical Formula 3]

[0183]

[0184] [Chemical Formula 4]

[0185]

[0186] [Other Additives]

[0187] In the present invention, the curable composition may further include a photopolymerization initiator, a light scattering agent, or a combination thereof.

[0188] The type of photopolymerization initiator is not particularly limited and may include, for example, triazine compounds, acetophenone compounds, benzophenone compounds, thioxanthone compounds, benzoin compounds, oxime ester compounds, aminoketone compounds, phosphine or phosphine oxide compounds, carbazole compounds, diketone compounds, sulfonium borate compounds, diazo compounds, nonimidazole compounds, or combinations thereof.

[0189] Examples of the above 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, 2-biphenyl-4,6-bis(trichloromethyl)-s-triazine, and bis(trichloromethyl)-6-styryl-s-triazine. Examples include 2-(naphtho-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxynaphtho-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, etc.

[0190] Examples of the above acetophenone-based 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, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one, etc.

[0191] Examples of the above benzophenone compounds include benzophenone, benzoyl benzoic acid, methyl benzoyl benzoate, 4-phenyl benzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4'-bis(dimethylamino)benzophenone, 4,4'-bis(diethylamino)benzophenone, 4,4'-dimethylaminobenzophenone, 4,4'-dichlorobenzophenone, 3,3'-dimethyl-2-methoxybenzophenone, etc.

[0192] Examples of the above thioxanthonic compounds include thioxanthon, 2-methylthioxanthon, isopropylthioxanthon, 2,4-diethylthioxanthon, 2,4-diisopropylthioxanthon, 2-chlorothioxanthon, etc.

[0193] Examples of the above-mentioned benzoin compounds include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, etc.

[0194] In the above composition, the content of the photopolymerization initiator can be appropriately adjusted by taking into account the type and content of the photopolymerizable monomer used.

[0195] In one embodiment, the content of the photopolymerizable initiator may be 0.01 wt% or more, 0.1 wt% or more, 0.5 wt% or more, or 1 wt% or more based on 100 wt% of the total composition. The content of the photopolymerizable initiator may be 10 wt% or less, or 5 wt% or less based on the total weight of the composition, but is not limited thereto.

[0196] The types of light scattering agents mentioned above are not particularly limited and may include, for example, barium sulfate (BaSO4), calcium carbonate (CaCO3), titanium dioxide (TiO2), zirconia (ZrO2), or a combination thereof.

[0197] The light scattering agent reflects light that is not absorbed by the quantum dots and enables the quantum dots to reabsorb the reflected light. In other words, the light scattering agent increases the amount of light absorbed by the quantum dots, thereby increasing the light conversion efficiency of the curable composition.

[0198] The form of use of the above light scattering agent is not particularly limited, and as an example, a dispersion in a solvent can be used for dispersion stability in a curable composition.

[0199] In the above composition, the light scattering agent content can be appropriately adjusted as needed.

[0200] In one embodiment, the content of the light scattering agent may be 0.1 weight% or more, 0.5 weight% or more, 1 weight% or more, or 5 weight% or more based on 100 weight% of the total composition. The content of the light scattering agent may be 10 weight% or less, or 5 weight% or less based on the total weight of the composition, but is not limited thereto.

[0201] When the above light scattering agent is included within the above content range, an improvement in light conversion efficiency due to the use of the light scattering agent can be expected, and pattern characteristics can also be improved.

[0202] In the present invention, the curable composition may further include at least one selected from the group consisting of a binder resin and a solvent.

[0203] The above binder resin may include an acrylic binder resin, a cardo-based binder resin, or a combination thereof.

[0204] Specific examples of the above-mentioned acrylic binder resins include (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, but are not limited thereto, and these may be used alone or in combination of two or more types.

[0205] In the present invention, the solvent may include propylene glycol monomethyl ether acetate, dipropylene glycol methyl ether acetate, cyclohexyl acetate, ethanol, ethylene glycol dimethyl ether, ethylene glycol butyl ether acetate, ethylene diglycol methyl ethyl ether, diethylene glycol dimethyl ether, dimethyl acetamide, dimethyl adipate, cyclohexyl acrylate, hydroxyethyl acrylate, 2-butoxyethanol, N-methylpyrrolidine, N-ethylpyrrolidine, propylene carbonate, γ-butyrolactone, acetone, or a combination thereof.

[0206] In another embodiment for achieving the above objective, the present invention provides a curable film comprising the above-mentioned curable composition and an image display device comprising the above-mentioned curable film.

[0207] A cured film comprising the above-mentioned curable composition and an image display device comprising the above-mentioned cured film can exhibit excellent color purity and, furthermore, increase color conversion efficiency by reducing the difference in refractive index of each layer due to the high refractive index characteristic, thereby reducing internal total reflection and increasing the amount of light emitted externally.

[0208]

[0209] The present invention will be explained in more detail below through the following examples. However, these examples are intended to illustrate the invention and the scope of the invention is not limited to these examples.

[0210]

[0211] 2. Hardened film

[0212] According to another embodiment of the present invention, a cured film comprising the photo-converting curable composition is provided.

[0213] The above cured film may be a color filter or a light-converting laminated substrate.

[0214] A color filter or light-converting laminated substrate according to one embodiment of the present invention includes the light-converting curable composition, and thus has the advantage of excellent color conversion efficiency, viscosity stability, and weight reduction rate.

[0215]

[0216] Color Filter

[0217] A color filter according to another embodiment of the present invention includes a substrate and a pattern layer formed on the upper surface of the substrate.

[0218] The above substrate may be the substrate of the color filter itself, or it may be a part where the color filter is located in a display device, etc., and is not particularly limited. The above substrate may be glass, silicon (Si), silicon oxide (SiO₂). x It may be an Al, GaAs, or polymer substrate, and the polymer may be a polyethersulfone, polycarbonate, polyester, aromatic polyamide, polyamideimide, polyimide, etc. The substrate may have a partition matrix formed thereon.

[0219] The above pattern layer is a layer comprising the curable composition of the present invention, and may be patterned by an inkjet printing patterning method or by photolithography.

[0220] The pattern formation method using the above-described inkjet printing patterning method can be performed by applying the above-described curable composition to a predetermined area using an inkjet method and curing the applied curable composition.

[0221] First, the curable composition of the present invention is injected into an inkjet sprayer and printed on a predetermined area of ​​a substrate.

[0222] In order to form a suitable phase on a substrate by being ejected from a piezo inkjet head, which is an example of an inkjet injector, characteristics such as viscosity, fluidity, and quantum dot particles must be balanced with the inkjet head. The piezo inkjet head used in the present invention is not limited, but ejects ink having a droplet size of about 10 to 100 pL, preferably about 20 to 40 pL.

[0223] When using an inkjet printing patterning method, the viscosity of the curable composition of the present invention is suitable to be about 3 to 30 cP, and more preferably controlled in the range of 7 to 20 cP.

[0224] The method for forming a pattern using the above-described photolithography method can be performed by applying the curable composition described above and exposing, developing, and heat-curing it into a predetermined pattern. The method for forming a pattern using the above-described photolithography method can be performed by carrying out a method commonly known in the relevant technical field.

[0225] The above color filter may have only two color pattern layers among a red pattern layer, a green pattern layer, and a blue pattern layer, but is not limited thereto. However, if the above color filter has only two color pattern layers, the pattern layer may further have a transparent pattern layer that does not contain the quantum dot particles.

[0226] If the above color filter has only pattern layers of the two types of colors, a light source emitting light of a wavelength that exhibits a color other than the two types of colors may be used. For example, if the above color filter includes a red pattern layer and a green pattern layer, a light source emitting blue light may be used. In this case, the red quantum dot emits red light and the green quantum dot emits green light, and the transparent pattern layer may appear blue as the blue light from the light source passes through it.

[0227]

[0228] <Photovoltaic Conversion Laminated Material>

[0229] A photo-converting laminated substrate according to another embodiment of the present invention comprises the photo-converting curable composition. By including a photo-converting resin composition that can be coated onto a glass substrate, the photo-converting laminated substrate can use a solvent that is not a substance harmful to the human body, thereby improving worker safety and product productivity.

[0230] The above photoconversion laminated substrate is silicon (Si) and silicon oxide (SiO x N y It may be a polymer substrate, and the polymer substrate may be polyethersulfone (PES) or polycarbonate (PC), etc.

[0231] The above photoconversion laminated substrate can be formed by applying the above photoconversion resin composition and heat-curing it.

[0232]

[0233] 3. Image display device

[0234] According to another embodiment of the present invention, an image display device comprising the cured film is provided.

[0235]

[0236] In an image display device according to one embodiment of the present invention, the cured film described above can be applied as a color filter or a light-converting laminated substrate, and accordingly, can be used to manufacture a light source for a color filter substrate or a backlight unit.

[0237] Specifically, the above image display device may include a liquid crystal display (LCD), an organic EL display (organic EL display device), a liquid crystal projector, a display device for a game console, a display device for a mobile terminal such as a mobile phone, a display device for a digital camera, a display device for a car navigation system, etc., and a color display device is particularly suitable.

[0238] An image display device according to one embodiment of the present invention may include a configuration known in the art, except that it includes the hardened film.

[0239] An image display device according to one embodiment of the present invention may have excellent characteristics in terms of color reproducibility, brightness, light resistance, and reliability.

[0240]

[0241]

[0242] The embodiments of the present invention will be described in more detail below through examples. However, the following examples are merely preferred embodiments of the present invention, and the present invention is not limited by the following examples.

[0243]

[0244] [Quantum Dot]

[0245] Ag / In / Ga / S (hereinafter 'QD-1') was prepared as a quantum dot. QD-1 is an Ag / In / Ga / S core-based Green QD with an emission wavelength of 530 nm and a full width at half maximum of 30 nm. The above QD-1 was prepared by dispersing it in toluene at a concentration of 20 wt%.

[0246]

[0247] [Examples 1-1 to 7-2 and Comparative Examples 1 to 2]

[0248] Using the above quantum dot QD-1 photopolymerizable monomer, photo-converting curable compositions of Examples 1-1 to 7-2 and Comparative Examples 1 to 2 were prepared according to the components and contents listed in Tables 1-1 and 1-2 below.

[0249]

[0250] [Table 1-1]

[0251]

[0252] [Table 1-2]

[0253]

[0254] [Comparative Example 1]

[0255] To the prepared 20 wt% QD-1 quantum dots, 35 wt% of the difunctional monomers Chemical Formula 1-2 and 36.5 wt% of Chemical Formula 3 were applied, and 1 wt% of TPO (TCI), a photopolymerization initiator (designated as PI-1), and 7 wt% of the light-scattering particle TiO2(A-2) were mixed. A curable composition was prepared by mixing 0.5 wt% of BYK-111 dispersant. The structures of Chemical Formula 1-2, Chemical Formula 3, and TPO used are as follows.

[0256]

[0257] [Comparative Example 2]

[0258] To the prepared 20 wt% QD-1 quantum dots, 35 wt% of the difunctional monomers Chemical Formula 1-2 and 36.5 wt% of Chemical Formula 4 were applied, and 1 wt% of TPO (TCI), a photopolymerization initiator (designated as PI-1), and 7 wt% of the light-scattering particle TiO2(A-2) were mixed. A curable composition was prepared by mixing 0.5 wt% of BYK-111 dispersant. The structures of Chemical Formula 4 and TPO used are as follows.

[0259]

[0260] [Example 1-1]

[0261] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-1 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light-scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-1 and TPO used are as follows.

[0262]

[0263] [Examples 1-2]

[0264] Example 1-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-1, to 56.5 wt% of Example 1-1. The structure of Formula 2-1 and TPO is the same as that of Example 1-1.

[0265]

[0266] [Example 2-1]

[0267] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-2 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light-scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-2 and TPO used are as follows.

[0268]

[0269] [Example 2-2]

[0270] Example 2-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer Formula 1-2, 15 wt%, and the monofunctional monomer Formula 2-2, 56.5 wt% of the weight ratio of Example 2-1.

[0271]

[0272] [Example 3-1]

[0273] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-3 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-3 and TPO used are as follows.

[0274]

[0275] [Example 3-1-1]

[0276]

[0277] To prepare the compound of Chemical Formula 2-3 above, 50.0 g of 3-phenoxybenzyl alcohol, 18.9 g of acrylic acid, 77.8 g of cyclohexane, 0.02 g of 4-hydroxy TEMPO (a prostab inhibitor), 0.02 g of 4-methoxyphenol, and 0.65 g of methanesulfonic acid were added to a 500 ml three-necked round-bottom flask. This mixture was heated to 85°C under stirring and distilled for 5 hours. The reaction mixture was washed with 250 ml of 10% sodium carbonate, washed with DI water, and then dried with MgSO4. After vacuum filtration, the mixture was concentrated to obtain 54 g of a pale yellow, low-viscosity liquid chemical 7-3 (yield 80.5%). The refractive index was 1.5648 and the viscosity was 16 cps at 25°C.

[0278] [LCMS] : 268

[0279]

[0280] [Example 3-2]

[0281] Example 3-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-3, to 56.5 wt% of Example 3-1.

[0282]

[0283] [Example 4-1]

[0284] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-4 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-4 and TPO used are as follows.

[0285]

[0286] [Example 4-2]

[0287] Example 4-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-4, to 56.5 wt% of Example 4-1.

[0288]

[0289] [Example 5-1]

[0290] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-5 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-5 and TPO used are as follows.

[0291]

[0292] [Example 5-2]

[0293] Example 5-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-5, to 56.5 wt% of Example 5-1.

[0294]

[0295] [Example 6-1]

[0296] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-6 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light-scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-6 and TPO used are as follows.

[0297]

[0298] [Example 6-2]

[0299] Example 6-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-6, to 56.5 wt% of Example 6-1.

[0300]

[0301] [Example 7-1]

[0302] A curable composition was prepared by applying 35 wt% of the difunctional monomer Formula 1-2 and 36.5 wt% of the monofunctional monomer Formula 2-7 to a prepared 20 wt% QD-1 quantum dot, and applying other additives such as a photopolymerization initiator, light-scattering particles, and a dispersant in the same manner as in the comparative example. The structures of Formula 2-7 and TPO used are as follows.

[0303]

[0304] [Example 7-2]

[0305] Example 7-2 prepared a curable composition by changing only the weight ratio of the difunctional monomer, Formula 1-2, to 15 wt% and the monofunctional monomer, Formula 2-7, to 56.5 wt% of Example 7-1.

[0306]

[0307] [Experimental Example]

[0308] A photoconversion coating layer was prepared as follows using the photoconversion curable compositions prepared according to Examples 1-1 to 7-2 and Comparative Examples 1 to 2. The film thickness, transmittance, color conversion efficiency (PCE), maximum emission wavelength, full width at half maximum (FWHM), viscosity, and refractive index were measured in the following manner, and the results are shown in Tables 2 and 3 below.

[0309] A thin film was fabricated by spin-coating a curable composition using SPIN3000D from MIDAS SYSTEM, and the thin film was cured by irradiating it with a wavelength of 395 nm using an exposure machine (Jueun UV Tech, SLC-1000AF-D).

[0310] Film thickness was measured using a step height measuring instrument (BRUKER DektakXT), and transmittance, color conversion efficiency (PCE), maximum emission wavelength, and full width at half maximum (FWHM) were measured using a quantum efficiency measuring instrument (Otsuka Electronics QE-2100). Viscosity was measured using a Brookfield ametek DV2T viscometer, and TiO2 particle size was measured using an Otsuka Electronics ELSZ-2000.

[0311] The refractive index of the monomer was measured in solution at 25°C using an ATAGO NAR-1T refractometer.

[0312] [Table 2]

[0313]

[0314] [Table 3]

[0315]

[0316] As shown in the results of Table 3 above, it was confirmed that the photocurable compositions of Examples 1-1 to 7-2 according to one embodiment of the present invention have excellent color conversion efficiency (PCE) of 38% or more when a monofunctional photopolymerizable monomer is necessarily included.

[0317] Preferably, the refractive index of the monofunctional monomer may be 1.50, 1.51, 1.52, 1.53, 1.54, or 1.55 or higher.

[0318] The content of the monofunctional monomer may be 20 to 70 weight% based on the total weight of the photo-converting curable composition, preferably 20 to 60 weight%, and more preferably 25 to 60 weight%. In this case, it was clearly observed that the color conversion efficiency in the cured film increased.

[0319] In addition, it was confirmed that it exhibits excellent color purity with an emission wavelength of 520 nm to 560 nm and a full width at half maximum of 30 nm to 40 nm.

[0320] On the other hand, it was confirmed that the photo-converting curable compositions of Comparative Examples 1 and 2 showed a color conversion efficiency (PCE) of less than 38% when the refractive index of the photo-converting curable composition was lower than 1.50.

[0321] The photo-converting curable composition implemented in the present invention effectively increased only the color conversion efficiency without changing the emission wavelength and full width at half maximum, which are optical characteristics of the quantum dots, even when the same quantum dots were applied.

[0322]

[0323] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the attached drawings, and it is obvious that such modifications also fall within the scope of the present invention.

[0324] Therefore, the substantive scope of the present invention shall be defined by the appended claims and their equivalents.

Claims

1. Quantum dot; Photopolymerizable monomers comprising difunctional monomers and monofunctional monomers; Photopolymerization initiator; and It includes scattered particles, The above monofunctional monomer is a photo-converting curable composition having a refractive index of 1.50 or higher.

2. In Paragraph 1, A photo-converting curable composition having a full width at half maximum (FWHM) of 30 nm to 40 nm.

3. In Paragraph 1, A photo-converting curable composition having a maximum emission wavelength of 520 nm to 560 nm.

4. In Paragraph 1, A photo-converting curable composition having a maximum emission wavelength of 580 nm to 700 nm.

5. In Paragraph 1, The above quantum dots are a photocurable composition further comprising a ligand layer on the surface.

6. In Paragraph 1, The above quantum dots comprise InP, CdSe, AgInGaS, ZnSeTe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, ZnSeSTe, HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof. A photo-converting curable composition.

7. In Paragraph 1, The above photo-converting curable composition further comprises one or more antioxidants selected from phosphorus-based antioxidants, phenolic-based antioxidants, and sulfur-based antioxidants.

8. In Paragraph 1, A photo-converting curable composition in which the above-mentioned difunctional monomer is a compound represented by the following chemical formula 1: [Chemical Formula 1] In the above chemical formula 1, R1 and R2 are identical or different from each other, and each is independently hydrogen or a C1-C6 alkyl group, and A1 and A2 are identical or different from each other, and each is independently O or CH2, and n is an integer from 0 to 12.

9. In Paragraph 1, A photo-converting curable composition in which the monofunctional monomer is a compound represented by the following chemical formula 2: [Chemical Formula 2] In the above chemical formula 2, R3 is hydrogen or a C1-C6 alkyl group, and R4 is hydrogen, a C1–C6 alkyl group, and a C6–C 30 aryl groups, heteroaryl groups having 5 to 30 nuclei, and C6~C 30 Selected from the group consisting of aryloxy groups, or combined with adjacent groups to form a condensation ring, A3 is O, S or N(R5), and A4 is O, S or N(R6), and The above R5 and R6 are identical or different from each other, and each is independently hydrogen or a C1-C6 alkyl group, and m is an integer from 0 to 4.

10. In Paragraph 9, A photo-converting curable composition wherein the compound represented by the above chemical formula 1 is a compound represented by any one of the following chemical formulas 1-1 to 1-3: [Chemical Formula 1-1] [Chemical Formula 1-2] [Chemical Formula 1-3] .

11. In Paragraph 9, A photo-converting curable composition wherein the compound represented by the above chemical formula 2 is a compound represented by any one of the following chemical formulas 2-1 to 2-8: [Chemical Formula 2-1] [Chemical Formula 2-2] [Chemical Formula 2-3] [Chemical Formula 2-4] [Chemical Formula 2-5] [Chemical Formula 2-6] [Chemical Formula 2-7] .

12. In Paragraph 1, Based on the total weight of the above photo-converting curable composition, The content of the above quantum dots is 1 to 30 weight%, and The content of the above difunctional monomer is 5 to 80 weight%, and The content of the monofunctional monomer is 20 to 70 weight%, and The content of the above photopolymerizable initiator is 0.5 to 2 weight%, and A photo-converting curable composition having a scattering particle content of 0.5 to 10 weight%.

13. A cured film comprising a photo-converting curable composition according to any one of claims 1 to 12.

14. In Paragraph 13, The above-mentioned cured film is a cured film that is a color filter or a light-converting laminated substrate.

15. An image display device comprising a hardened film according to paragraph 13.

Images