Ink composition and electronic device including film formed using the ink composition

Abstract

Provided is an ink composition comprising: a quantum dot comprising at least one organic ligand on a surface thereof; a first monomer comprising at least one epoxy group; a second monomer comprising at least one oxetane group; a third monomer comprising at least one thiol group; and a tertiary amine compound comprising at least one allylamine group, wherein the organic ligand may comprise at least one polar moiety. In addition, an electronic device including a film formed using the ink composition is disclosed.

Description

Technical Field

[0001] One or more embodiments are directed to ink compositions and electronic devices including films prepared using the ink compositions. Background Art

[0002] A light-emitting device is a device that converts electrical energy into light energy. Examples of such light-emitting devices include organic light-emitting devices using organic materials for emission layers, quantum dot light-emitting devices using quantum dots for emission layers, and the like. The light-emitting device may be included in various electronic devices, and may be included in electronic devices such as display devices, for example.

[0003] As a method of realizing color in a display device, it is proposed to use a color conversion layer containing a color conversion luminescent material, which absorbs light of a specific wavelength and converts the light into light of another wavelength and emits the light, thereby further improving the color purity of red (R), green (G) and blue (B).

[0004] The color conversion layer can be formed by using an inkjet printing method. Therefore, there is a need for a material suitable for use in the inkjet printing method. Summary of the invention

[0005] Technical issues

[0006] One or more embodiments include an ink composition for forming a quantum dot film that is not damaged by bending and has low visibility of a folded portion, a quantum dot film formed using the ink composition, and an electronic device including the quantum dot film.

[0007] Solution to the problem

[0008] According to one or more embodiments, the ink composition comprises:

[0009] A quantum dot comprising at least one organic ligand on a surface,

[0010] a first monomer comprising at least one epoxy group,

[0011] a second monomer comprising at least one oxetane group,

[0012] a third monomer comprising at least one thiol group, and

[0013] a tertiary amine compound comprising at least one allylamine group,

[0014] The organic ligand may comprise at least one polar moiety.

[0015] The third monomer may include a compound including a plurality of thiol groups.

[0016] According to the embodiment, the third monomer may include a compound including one thiol group and a compound including a plurality of thiol groups.

[0017] According to the embodiment, the third monomer may be represented by Formula 3-1 or Formula 3-2:

[0018] Formula 3-1

[0019]

[0020] Formula 3-2

[0021]

[0022] In formula 3-1 and formula 3-2,

[0023] L 31 Can be straight chain or branched C 1 -C 20 Alkane groups, straight or branched C 1 -C 20 Olefin group or C 6 -C 20 Aromatic groups,

[0024] L 32 and L 33 Can be single key, *-O-*' or

[0025] A 32 Can be *-S-*'、C 3 -C 20 Heteroaromatic groups or

[0026] a31 to a33 may each independently be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,

[0027] R 31 To R 35 can be independently hydrogen, deuterium, a halogen element, or a linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0028] n32 and n33 can each independently be 0, 1, 2, 3, 4 or 5,

[0029] The sum of n32 and n33 may be 1 or greater than 1, and

[0030] * and *' each represent a binding site with an adjacent atom.

[0031] The tertiary amine compound may include a compound including a plurality of allylamine groups.

[0032] According to the embodiment, the tertiary amine compound may include a compound including one allylamine group and a compound including a plurality of allylamine groups.

[0033] The tertiary amine compound can be represented by Formula 4-1 or Formula 4-2:

[0034] Formula 4-1

[0035]

[0036] Formula 4-2

[0037]

[0038] In formula 4-1 and formula 4-2,

[0039] L 41 , L 42 and L 43 Can be directly connected to each other independently.

[0040] a41 and a42 can each independently be 0, 1, 2, 3, 4 or 5,

[0041] a43 can be 1, 2, 3, 4 or 5,

[0042] R 41 To R 48 can each independently be hydrogen, deuterium, a halogen element, -CH 2 -CH=CH 2 , or substituted or unsubstituted linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0043] The straight chain, branched chain or cyclic C 1 -C 20 Substituents of the alkyl group may include deuterium, halogen elements or -N(CH 2 -CH=CH 2 ) 2 ,as well as

[0044] * and *' each represent a binding site with an adjacent atom.

[0045] The quantum dots may include Group II-VI semiconductor compounds, Group III-V semiconductor compounds, Group III-VI semiconductor compounds, Group I-III-VI semiconductor compounds, Group IV-VI semiconductor compounds, Group IV elements or compounds, or combinations thereof.

[0046] According to an embodiment, the quantum dots may have a core-shell structure.

[0047] According to an embodiment, the at least one polar portion of the organic ligand may include an alkyl polyol structure.

[0048] The ink composition may further include a photopolymerization initiator.

[0049] The ink composition may have a viscosity of about 20 centipoise (cP) to about 80 cP at a temperature of 25°C.

[0050] The ink composition may include 2 parts by weight of a solvent based on 100 parts by weight of the ink composition.

[0051] According to an embodiment, a film prepared from the ink composition is provided.

[0052] According to an embodiment, the film may include a matrix in which a polyether resin and a polysulfide resin may be network-bonded to each other.

[0053] According to an embodiment, the polyether resin and the polysulfide resin may each independently include a network structure and a chain structure,

[0054] And the film may further include a connecting portion that can cross-link the polyether resin and the polysulfide resin.

[0055] The linking moiety may include an amine group.

[0056] According to another embodiment, an electronic device comprises: a film prepared from the ink composition,

[0057] and a light emitting device comprising a first electrode, a second electrode and an intermediate layer between the first electrode and the second electrode,

[0058] The film may be positioned in a direction of travel of light emitted by the light emitting device.

[0059] According to an embodiment, the film may absorb light of a first color and emit light of a second color.

[0060] The electronic device may further include a thin film transistor,

[0061] The thin film transistor may include a source electrode and a drain electrode, and the first electrode of the light emitting device may be electrically connected to at least one of the source electrode and the drain electrode of the thin film transistor.

[0062] Advantageous Effects of the Invention

[0063] By using the ink composition according to an embodiment of the present disclosure, a quantum dot film that is not damaged by bending and has low visibility of a folded portion and an electronic device including the quantum dot film may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 is a schematic view of a light emitting device according to the embodiment;

[0065] Figure 2 is a schematic view of a light emitting device according to another embodiment;

[0066] Figure 3 is a schematic view of a light emitting device according to the embodiment; and

[0067] Figure 4 is a scanning electron microscope (“SEM”) image of the quantum dots obtained in Preparation Example 1. DETAILED DESCRIPTION

[0068] Since the present disclosure allows various changes and multiple embodiments, specific embodiments will be illustrated in the drawings and described in detail in the written description. By referring to the exemplary embodiments of the present disclosure with respect to the drawings, the effects, features and methods of implementing the present disclosure will be apparent. However, the present disclosure can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.

[0069] Hereinafter, the present inventive concept will be described in detail by explaining exemplary embodiments of the present inventive concept with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements, and thus their description will be omitted.

[0070] In the embodiments described in the present specification, an expression used in the singular includes an expression in the plural unless it has an apparently different meaning in the context.

[0071] In the embodiments described herein, the prefix "poly" is intended to mean one or more than one plural form.

[0072] In the present specification, it should be understood that terms such as "include", "have" and "comprising" are intended to indicate the presence of features or components disclosed in the specification, but are not intended to exclude the possibility that one or more other features or components may exist or may be added.

[0073] It should be understood that when a layer, region or component is referred to as being "on" or "over" another layer, region or component, it may be formed directly or indirectly on the other layer, region or component. That is, for example, there may be intervening layers, regions or components.

[0074] For convenience of explanation, the sizes of components in the drawings may be exaggerated. In other words, since the sizes and thicknesses of components in the drawings are arbitrarily illustrated for convenience of explanation, the following embodiments are not limited thereto.

[0075] The term "room temperature" as used herein refers to a temperature of about 25°C.

[0076] In this specification, the term "matrix" refers to a polymer in which quantum dots are dispersed.

[0077] [Ink composition]

[0078] The ink composition may include quantum dots comprising at least one organic ligand on a surface, a first monomer comprising at least one epoxy group, a second monomer comprising at least one oxetane group, a third monomer comprising at least one thiol group, and a tertiary amine compound comprising at least one allylamine group.

[0079] The first monomer may contain 1, 2, 3, 4 or 5 epoxy groups. In particular, the first monomer may contain 2, 3, 4 or 5 epoxy groups.

[0080] The first monomer may include a ring structure and / or a linear or branched structure within the molecular structure.

[0081] For example, the first monomer may include a linear, branched or cyclic C 1 -C 20 Alkane groups, straight chain, branched or cyclic C 1 -C 20 Olefin group, or C 6 -C 20 Aromatic group.

[0082] The first monomer may include an ether group or an ester group.

[0083] According to the embodiment, the first monomer may be represented by Formula 1-1 or Formula 1-2:

[0084] Formula 1-1

[0085]

[0086] Formula 1-2

[0087]

[0088] In formula 1-1 and formula 1-2,

[0089] A 11 Can be straight chain, branched chain or cyclic C 1 -C 20 Alkane groups, straight chain, branched or cyclic C1 -C 20 Olefin group, or C 6 -C 20 Aromatic groups,

[0090] A 12 Can be cyclic C 1 -C 20 Alkane group or cyclic C 1 -C 20 Olefin groups,

[0091] L 11 Can be *-O-*' or

[0092] a11 can be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,

[0093] R 11 To R 15 can be independently hydrogen, deuterium, a halogen element, or a linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0094] b11 can be an integer from 1 to 12.

[0095] n11 can be 1, 2, 3, 4, or 5, and

[0096] * and *' each represent a binding site with an adjacent atom.

[0097] In some embodiments, when the first monomer includes a linear or branched alkane group, the following may be presented as specific examples thereof, but are not limited thereto:

[0098] Monofunctional compounds: butyl glycidyl ether, isobutyl glycidyl ether, 2-ethylhexyl glycidyl ether, hexadecyl glycidyl ether, triethylene glycol diglycidyl ether, allyl glycidyl ether, polypropylene glycol glycidyl ether and glycidyl ester neodecanoate;

[0099] Difunctional compounds: 1,4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, propylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,4-cyclohexanedimethanol diglycidyl ether, and polypropylene glycol diglycidyl ether; and

[0100] Trifunctional or polyfunctional compounds: glycerol triglycidyl ether, trimethylolpropane triglycidyl ether, pentaerythritol polyglycidyl ether, dipentaerythritol polyglycidyl ether and alkyl polyol polyglycidyl ether.

[0101] In some embodiments, when the first monomer includes a cyclic structure, the following may be presented as specific examples thereof, but are not limited thereto:

[0102] Cyclohexyl dimethanol glycidyl ether, dicyclopentadiene glycidyl ether, 1,2-epoxy-4-vinylcyclohexane, 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate, 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate-modified caprolactone; and naphthyl glycidyl ether, cresyl glycidyl ether, p-tert-butylphenol glycidyl ether, thiodiphenyl diglycidyl ether, 3-alkane 1,2-diphenylphenol glycidyl ether, 2-phenylphenol glycidyl ether, benzyl glycidyl ether, 2-butylphenyl glycidyl ether, resorcinol diglycidyl ether, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether, 2,2"-diarylbisphenol A diglycidyl ether, bisphenol A diglycidyl ether added with propylene oxide, 2-biphenyl glycidyl ether, triglycidyl aminophenol, tetraglycidyl methylene dianiline.

[0103] In some embodiments, the first monomer can be, for example, KUKDO FINECHEM KF EPIOL products ME-100, ME101, ME103, ME105, ME106, ME102, ME700, ME701, ME702, ME704, DE200, DE201, DE202, DE203, DE204, DE205, DE207, DE208, DE209, DE213, DE214, DE215, DE216, DE703, DE704, PE300, PE311, PE411, PE412, and PE510, which are commercially available compounds; EVONIK EPODIL products 733, 741, 742, 746, 747, 748, 749, 750, 757, 759, 761, 777, and 781; DAICELL CELLOXIDE products 2021P, 2000, 2081 and 8010; HEXION HELOXY TM ProductsDB, HD and WF, HEXION EPICOTE TMResin products 215, 232, 235, 238, 240, 246, 320, 827, 828EL, 862 and 896; Adeka GLYCIROL ED products ED-502, ED-509, ED-529, ED-503, ED-506, ED-523T, ED-505, ED-508 and ED-512EX Adeka EP products EP-4400, EP-4520, EP4530 and EP-4005; DIC EPICLON products 520, HP-4032SS, TGAP BPFDGE, BPADGE, HP-4770, EXA-4750 and EXA-7250.

[0104] The first monomer may be used alone, or two or more different types selected from the first monomer may be used in combination.

[0105] The molecular weight of the first monomer may be from about 100 grams / mole (g / mol) to about 800 g / mol.

[0106] The first monomer may be about 10 parts by weight or more and less than about 70 parts by weight, for example, about 15 parts by weight or more and less than about 50 parts by weight, or, for example, about 20 parts by weight or more and less than about 40 parts by weight, based on 100 parts by weight of the ink composition. When the content of the first monomer is within these ranges, the viscosity of the ink composition may be maintained, and the degree of curing and cross-linking during curing may be improved.

[0107] The second monomer may contain 1, 2, 3, 4, or 5 oxetane groups.

[0108] The second monomer may include a ring structure and / or a linear or branched structure within the molecular structure.

[0109] For example, the second monomer may include a linear, branched or cyclic C 1 -C 20 Alkane groups, straight chain, branched or cyclic C 1 -C 20 Olefin group, or C 6 -C 20 Aromatic group.

[0110] The second monomer may include an ether group or an ester group.

[0111] According to the embodiment, the second monomer may be represented by Formula 2-1 or Formula 2-2:

[0112] Formula 2-1

[0113]

[0114] Formula 2-2

[0115]

[0116] In formula 2-1 and formula 2-2,

[0117] A 21 Can be straight chain, branched chain or cyclic C 1 -C 20 Alkane groups, straight chain, branched or cyclic C 1 -C 20 Olefin group, or C 6 -C 20 Aromatic groups,

[0118] A 22 Can be cyclic C 1 -C 20 Alkane group or cyclic C 1 -C 20 Olefin groups,

[0119] L 21 Can be *-O-*' or

[0120] a21 can be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,

[0121] R 21 To R 27 can be independently hydrogen, deuterium, a halogen element, or a linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0122] b21 can be an integer from 1 to 12.

[0123] n21 can be 1, 2, 3, 4, or 5, and

[0124] * and *' each represent a binding site with an adjacent atom.

[0125] In some embodiments, the second monomer may be, for example, 1,4-bis[(3-ethyl-3-oxetanylmethoxy)methyl]benzene, 1,4-bis[(3-methyl-3-oxetanylmethoxy)methyl]benzene, 3-methyl-3-glycidyloxetane, 3-ethyl-3-glycidyloxetane, di[1-ethyl(3-oxetanyl)]methyl ether, 3-ethyl-3-hydroxymethyloxetane, 3-ethyl-3-[(3-ethoxyoxetane-3-yl)methoxy]oxetane, 3-ethyl-3-phenoxymethyloxetane, 3-ethyl-3-[(2-ethylhexyloxy)methyl]oxetane, oxetanyl-silicate (salt) and phenol novolac resin oxetane, but is not limited thereto.

[0126] In some embodiments, the second monomer may be, for example, TOAGOSEI ARONOXETANE products OXT-221, OXT-101, OXT-121, OXT-212, OXT-211, CHOX, and OX-SC, which are commercially available compounds; Products include, but are not limited to, EHO, OXBP, OXTP and OXMA.

[0127] The second monomer may be used alone, or two or more different types selected from the second monomer may be used in combination.

[0128] The molecular weight of the second monomer may be about 100 g / mol to about 800 g / mol.

[0129] The second monomer may be about 5 parts by weight or more and less than about 80 parts by weight, specifically, about 10 parts by weight or more and less than about 50 parts by weight, or more specifically, about 15 parts by weight or more and less than about 30 parts by weight, based on 100 parts by weight of the ink composition. When the content of the second monomer is within these ranges, the viscosity of the ink composition may be maintained, and the degree of curing and cross-linking during curing may be improved.

[0130] The second monomer may be included in an amount of about 20 parts by weight to about 350 parts by weight based on 100 parts by weight of the first monomer. When the ratio of the first monomer to the second monomer is within this range, adhesive strength and / or peel strength of the ink composition may be further improved.

[0131] The third monomer may comprise 1, 2, 3, 4 or 5 thiol groups. For example, the third monomer may comprise 2, 3 or 4 thiol groups.

[0132] The third monomer may include a ring structure, a linear structure and / or a branched structure in the molecular structure. For example, the third monomer may include a sulfide group, an oxo group, an alkylene group, an ether group or an ester group in the molecular structure.

[0133] According to the embodiment, the third monomer may be represented by Formula 3-1 or Formula 3-2:

[0134] Formula 3-1

[0135]

[0136] Formula 3-2

[0137]

[0138] In formula 3-1 and formula 3-2,

[0139] L 31 Can be straight chain or branched C 1 -C 20 Alkane groups, straight or branched C 1 -C 20 Olefin group, or C 6 -C 20 Aromatic groups,

[0140] L 32 and L 33 Can be single key, *-O-*' or

[0141] A 32 Can be *-S-*'、C 3 -C 20 Heteroaromatic groups or

[0142] a31 to a33 may each independently be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,

[0143] R 31 To R 35 can be independently hydrogen, deuterium, a halogen element, or a linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0144] n32 and n33 may each independently be 0, 1, 2, 3, 4 or 5, and

[0145] The sum of n32 and n33 may be 1 or greater.

[0146] * and *' each represent a binding site with an adjacent atom.

[0147] In some embodiments, examples of the third monomer may be as follows, but the embodiments are not limited thereto:

[0148] Dimercaptodiethyl sulfide, 1,8-dimercapto-3,6-dioxooctane, ethylene bis(3-mercaptopropionate), pentaerythritol tetra(3-mercaptopropionate), pentaerythritol tetra(2-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), tetraethylene glycol bis(3-mercaptopropionate), dipentaerythritol hexa(3-mercaptopropionate), tris[2-(3-mercaptopropionyloxy)ethyl]isocyanurate, 1,4-bis(3-mercaptobutyryloxy)butane, pentaerythritol tetra(3-mercaptoacetate) 1H,3H,5H)-trione, 1,6-hexanedithiol, 1,3-propanedithiol, 1,2-ethanedithiol, ethylene glycol dimercaptoacetate, ethoxylated ethylene glycol dimercaptoacetate, ethoxylated trimethylpropane tris(3-mercaptopropionate), polypropylene glycol di(3-mercaptopropionate), and polyethylene glycol dithiols containing 1 to 10 ethylene glycol repeating units.

[0149] In some embodiments, the third monomer can be, for example, DMES and DMDO from Itochu Specialty Chemical Inc., which are commercially available compounds; EBMP from Hampshire Chemicals; PEMP, TMMP, EGMP-4, DPMP from Sakai Chemical; TEMPIC, Karenz MT BD1, Karenz MT PE1, Karenz MT NR1 from Showa Denko; or HDT from Aldrich Chemical Co., etc.

[0150] The third monomer may be used alone, or two or more different types selected from the third monomer may be used in combination.

[0151] The molecular weight of the third monomer may be about 100 g / mol to about 800 g / mol.

[0152] The third monomer may be about 10 parts by weight or more and less than about 50 parts by weight, or, for example, about 15 parts by weight or more and less than about 30 parts by weight, based on 100 parts by weight of the ink composition. When the content of the third monomer is within these ranges, the viscosity of the ink composition may be maintained, and the degree of curing and cross-linking during curing may be improved.

[0153] According to an embodiment, the tertiary amine compound including at least one allylamine group may include Formula 4-1 or Formula 4-2:

[0154] Formula 4-1

[0155]

[0156] Formula 4-2

[0157]

[0158] In formula 4-1 and formula 4-2,

[0159] L 41 , L 42 and L 43 Can be directly connected to each other independently.

[0160] a41 and a42 can each independently be 0, 1, 2, 3, 4 or 5,

[0161] a43 can be 1, 2, 3, 4 or 5,

[0162] R 41 To R 48 can each independently be hydrogen, deuterium, a halogen element, -CH 2 -CH=CH 2 , or substituted or unsubstituted linear, branched or cyclic C 1 -C 20 Alkyl groups,

[0163] Straight chain, branched chain or cyclic C 1 -C 20 Substituents of the alkyl group may include deuterium, halogen elements or -N(CH 2 -CH=CH 2 ) 2 ,as well as

[0164] * and *' each represent a binding site with an adjacent atom.

[0165] In some embodiments, the tertiary amine compound containing at least one allylamine group can be, for example, 1,4-diallylpiperazine, 1,4-diallyl-2-methyl-piperazine, N-allyl-N-[2-(4-allylpiperazin-1-yl)ethyl]prop-2-en-1-amine, 3-[4-[3-(diallylamino)ethyl]piperazin-1-yl]-N,N-diallylethane-1-amine, N,N,N',N'-tetraallylethane-1,2-diamine, N,N'-dimethyl -N,N'-diallylethane-1,2-diamine, N,N'-diethyl-N,N'-diallylethane-1,2-diamine, N-[2-(diallylamino)ethyl]-N,N',N'-triallylethane-1,2-diamine, N,N-bis[2-(diallylamino)ethyl]-N',N'-diallylethane-1,2-diamine or N,N'-bis[2-diallylamino)ethyl]-N,N'-diallylethane-1,2-diamine, but are not limited thereto.

[0166] The structure of an example of a tertiary amine compound containing at least one allylamine group is shown below.

[0167]

[0168] The content of the tertiary amine compound including at least one allylamine group may be about 50 parts by weight to about 500 parts by weight based on 100 parts by weight of the first monomer. When the content of the tertiary amine compound including at least one allylamine group is within this range, the viscosity of the ink composition may be maintained, the curing reaction rate may be sufficiently accelerated, and the physical properties and / or adhesion of the provided film may not be impaired.

[0169] The double bond of the tertiary amine compound containing at least one allylamine group can react with the thiol group of the third monomer to cause thiol-ene polymerization. The thiol-ene system can have the property of inhibiting the cationic photopolymerization of the epoxy group of the first monomer or the oxetane group of the second monomer. However, by using a multifunctional tertiary amine compound containing at least one allylamine group, anionic polymerization of the epoxy group or oxetane group emitted by the heat-activated thiol-ene reaction induced by UV curing can be initiated.

[0170] The mechanism of the thiol-ene reaction and anionic epoxy polymerization reaction of the tertiary amine compound containing an allyl group is shown below.

[0171]

[0172] The polymer produced by curing the ink composition according to the embodiment may include a polymer cross-linked structure in which a polyether and a polysulfide are bonded to each other in a reticular manner. The polyether is a polymer derived from a monomer containing an epoxy group or an oxetane group, and the polysulfide is a polymer derived from a monomer containing a thiol group. In an embodiment, the polyether polymer and the polysulfide polymer may each independently have a reticular structure or a chain structure.

[0173] Due to the cross-linked structure of the polymer, the polymer can disperse stress and improve impact resistance at the same time. On the other hand, when the concentration of the polysulfide with flexible properties in the resulting polymer reaches a certain level or higher, toughness is improved. In addition, unlike the situation where soft materials such as liquid rubber are added to epoxy resin to improve toughness, a completely uniform material can be produced by the mixed reaction of epoxy-amine / thiol-ene and solidification. Therefore, the mechanical properties and optical properties of the film formed in this way are better. In addition, it can be expected that the effect of suppressing the deformation caused by the external force occurring when the polymer is formed by the thiol-ene reaction alone.

[0174] In an embodiment, the ink composition may include less than 2 parts by weight of a solvent based on 100 parts by weight of the ink composition. In an embodiment, the ink composition may include substantially no solvent. That is, the ink composition may be a solvent-free ink composition.

[0175] The ink composition can be used for application to the inkjet process by not including a solvent. In detail, in the case where the ink composition includes a solvent, it is necessary to perform the inkjet process to about 5 times the thickness when using a solvent-free ink composition to obtain a target level of film thickness after drying. Therefore, the ink composition containing a solvent is disadvantageous for accurately forming a film, and for example, when forming a color conversion member, color mixing between pixels may easily occur. In addition, when using an ink composition containing a solvent, nozzle drying and nozzle clogging may occur due to solvent volatilization, and the organic solvent may remain in the formed film, thereby affecting the degradation of other organic layers, which may adversely affect reliability by releasing gas.

[0176] The ink composition may further include a photopolymerization initiator. A photopolymerization initiator is a compound that can be initiated by forming free radicals by light. The photopolymerization initiator is used to accelerate polymerization and improve the curing rate, and suitable photopolymerization initiators known in the art can be used without any particular limitation.

[0177] According to an embodiment, the photopolymerization initiator may include a triazine-based compound, an acetophenone compound, a benzophenone compound, a thioxanthone compound, a benzoin compound, an oxime-based compound, an aminoketone compound, a phosphine or phosphine oxide compound, a carbazole-based compound, a diketone compound, a sulfonium borate-based compound, a diazo-based compound, a non-imidazole compound, or a combination thereof, but is not limited thereto.

[0178] Examples of the triazine-based compound may include 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis(trichloromethyl)-s-triazine, 2-(3',4'-dimethoxyphenyl)-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, methyl)-s-triazine, 2-biphenyl-4,6-bis(trichloromethyl)-s-triazine, bis(trichloromethyl)-6-phenylvinyl-s-triazine, 2-(naphthalen-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxynaphthalen-1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2,4-trichloromethyl(piperonyl)-6-triazine and 2,4-(trichloromethyl(4'-methoxyphenylvinyl)-6-triazine, but are not limited thereto.

[0179] Examples of the acetophenone-based compound may include 2,2′-diethoxyacetophenone, 2,2′-dibutoxyacetophenone, 2-hydroxy-2-methylpropiophenone, p-tert-butyltrichloroacetophenone, p-tert-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, but are not limited thereto.

[0180] Examples of the benzophenone-based compound may include benzophenone, benzoyl benzoate, methyl benzoyl benzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylic benzophenone, 4,4′-bis(dimethylamino)benzophenone, 4,4′-dichlorobenzophenone, and 3,3′-dimethyl-2-methoxybenzophenone, but are not limited thereto.

[0181] Examples of the thioxanthone-based compound may include thioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, and 2-chlorothioxanthone, but are not limited thereto.

[0182] Examples of the benzoin-based compound may include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and benzyl dimethyl ketal, but are not limited thereto.

[0183] Examples of the oxime-based compound may include 2-(o-benzoyloxime)-1-[4-(phenylthio)phenyl]-1,2-octanedione and 1-(o-acetyloxime)-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone, but are not limited thereto.

[0184] Examples of the phosphine or phosphine oxide compound may include 2,4,6-trialkylbenzoyldiphenylphosphine oxide, 2,4,6-trialkylbenzoyldiphenylphosphinate, or a combination thereof, but are not limited thereto.

[0185] The content of the photopolymerization initiator in the composition is not particularly limited and can be appropriately selected. In some embodiments, based on 100 parts by weight of the ink composition, the content of the polymerization initiator can be about 0.0001 parts by weight to about 10 parts by weight, about 0.001 parts by weight to about 10 parts by weight, about 0.01 parts by weight to about 10 parts by weight, or about 0.1 parts by weight to about 5 parts by weight, but not limited thereto. In some embodiments, based on 100 parts by weight of a mixture of a third monomer comprising at least one thiol group and a tertiary amine compound comprising at least one allylamine group, the content of the photopolymerization initiator can be about 0.01 parts by weight to about 10 parts by weight, about 0.1 parts by weight to about 10 parts by weight, or about 1 parts by weight to about 5 parts by weight, but not limited thereto. When the content of the photopolymerization initiator is within these ranges, a sufficiently high operating speed can be obtained, and the film non-uniformity caused by an excessively fast curing reaction can be reduced.

[0186] The ink composition according to one or more embodiments may include quantum dots. The quantum dots are not particularly limited as long as they can emit light by absorbing light, and the quantum dots may include II-VI semiconductor compounds; III-V semiconductor compounds; III-VI semiconductor compounds; I-III-VI semiconductor compounds; IV-VI semiconductor compounds; IV elements or compounds; or combinations thereof.

[0187] Examples of II-VI semiconductor compounds may include binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe or MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe or MgZnS; quaternary compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe or HgZnSTe; or combinations thereof.

[0188] Examples of III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, or InSb; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, or InPSb; quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb; or combinations thereof. In some embodiments, the III-V semiconductor compound may further include a Group II element. Examples of the Group III-V semiconductor compound further including a Group II element may include InZnP, InGaZnP, InAlZnP, and the like.

[0189] Examples of III-VI semiconductor compounds may include binary compounds such as GaS, GaSe, Ga 2 Se 3 、GaTe、InS、InSe、In 2 S 3 、In 2 Se 3 , InTe, etc.; ternary compounds, such as InGaS 3 、InGaSe 3 etc.; or a combination thereof.

[0190] Examples of Group I-III-VI semiconductor compounds may include ternary compounds such as AgInS, AgInS 2 、CuInS、CuInS 2 、CuGaO 2 、AgGaO 2 or AgAlO 2 ; or a combination thereof.

[0191] Examples of IV-VI semiconductor compounds may include binary compounds such as SnS, SnSe, SnTe, PbS, PbSe or PbTe; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe or SnPbTe; quaternary compounds such as SnPbSSe, SnPbSeTe or SnPbSTe; or combinations thereof.

[0192] The Group IV element or compound may be a single element material, such as Si or Ge; a binary compound, such as SiC or SiGe; or a combination thereof.

[0193] The individual elements contained in the multi-element compound (eg, binary compound, ternary compound, and quaternary compound) may be present in particles thereof at uniform or non-uniform concentrations.

[0194] The quantum dots can be homogeneous single structures; dual structures, such as core-shell structures; triple structures, such as core-shell-shell structures; gradient structures; or mixed structures thereof. In some embodiments, the material contained in the core can be different from the material contained in the shell.

[0195] Examples of the shell of the quantum dot include metal oxides, metalloid oxides or non-metal oxides, semiconductor compounds or combinations thereof. Examples of metal oxides, metalloid oxides or non-metal oxides may include binary compounds such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 or NiO; ternary compounds such as MgAl 2 O 4 、CoFe 2 O4 、NiFe 2 O 4 or CoMn 2 O 4 ; or a combination thereof. Examples of semiconductor compounds may include II-VI semiconductor compounds; III-V semiconductor compounds; III-VI semiconductor compounds; I-III-VI semiconductor compounds; IV-VI semiconductor compounds; or a combination thereof.

[0196] According to the embodiment, the core may include at least one material selected from the group consisting of CdSe, CdS, InP, InGaP, ZnS, ZnSe, CdTe, CdSeTe, CdZnS, PbSe, AgInZnS, and ZnO, but the embodiment is not limited thereto.

[0197] According to the embodiment, the shell may include at least one material selected from the group consisting of CdSe, ZnSe, ZnS, ZnTe, CdTe, PbS, TiO, SrSe, and HgSe, but the embodiment is not limited thereto.

[0198] The quantum dot may include at least one organic ligand on the surface, and the organic ligand may include at least one polar part. The monomer included in the ink composition may have a relatively high polarity. Therefore, when the polarity of the quantum dot is low, it may be difficult to evenly disperse the quantum dot in the ink composition. Therefore, in order to increase the polarity of the quantum dot, an organic ligand including at least one polar part may be used.

[0199] For example, the polar part may include an oxyalkylene group. In some embodiments, the polar part may be a substituted or unsubstituted oxymethylene group or a substituted or unsubstituted oxyethylene group. For example, a ligand in which a linker functional group that is easily bonded to the surface of the quantum dot is combined with one or both ends of the oxyalkylene group of a single or repeating structure may be used, but the ligand is not limited to this molecular structure, and polar ligand molecules known in the art may be used for this purpose.

[0200] In some embodiments, the polar moiety can be tetramethoxyethylene glycol.

[0201] According to an embodiment, the ligand and the quantum dot may be chemically bonded via a hydroxyl group, a thiol group, a carboxyl group, an ester group, and / or a phosphate group.

[0202] According to the embodiment, the ligand may further include a linear, branched or cyclic C 1 -C 20 Alkane groups, straight chain, branched or cyclic C 1 -C 20 Olefin group, C 6 -C20 Aromatic groups or C 1 -C 20 Heteroaromatic groups.

[0203] Quantum dots can be prepared by: dispersing quantum dots including ligands that do not contain a polar portion on the surface in a non-polar solvent; adding a ligand containing a polar portion to the dispersed solution and stirring; and extracting the supernatant by centrifugation and drying to obtain quantum dots including ligands that contain at least one polar portion on the surface.

[0204] In some embodiments, the content of the quantum dots may be about 20 parts by weight to about 60 parts by weight, specifically about 25 parts by weight to about 50 parts by weight, or more specifically about 30 parts by weight to about 45 parts by weight, based on 100 parts by weight of the ink composition.

[0205] The ink composition may further include a scatterer. The scatterer is not limited as long as the scatterer scatters and diffuses light that is not absorbed by the quantum dots and allows the scattered light to be absorbed by the quantum dots again. That is, the scatterer can increase the amount of light absorbed by the quantum dots, thereby increasing the light conversion efficiency of the color conversion layer.

[0206] In an embodiment, the scatterer may include a plurality of inorganic particles having different particle sizes.

[0207] In some embodiments, the scatterer may include a material selected from BiFeO 3 , Fe 2 O 3 , WO 3 、TiO 2 、SiC、BaSO 4 、BaTiO 3 、ZnO、ZrO 2 、ZrO、Ta 2 O 5 、MoO 3 、TeO 2 , Nb 2 O 5 , Fe 3 O 4 、V 2 O 5 , Cu 2 O, BP, Al 2 O 3 、In 2 O 3 SnO 2 , Sb 2 O 3 、CaCO 3 and ITO or a combination thereof.

[0208] In some embodiments, the average diameter of the scatterer can be about 150 nanometers (nm) to about 250nm, specifically about 180nm to about 230nm. When the average diameter of the scatterer is within any one of these ranges, a more improved light scattering effect can be obtained, and the light conversion efficiency of the light conversion layer can be improved.

[0209] In some embodiments, the refractive index of the scatterer can be greater than 1.5.

[0210] As described above, the scatterer may include inorganic particles having various particle sizes so that the refractive index can be increased. Therefore, the refractive index difference between the scatterer and the surrounding components can be increased, and thus, total reflection of blue light is likely to occur, and thus, the absorptivity of blue light can be increased, and the light conversion efficiency can be improved.

[0211] In some embodiments, the content of the scatterer may be about 0.1 parts by weight to about 20 parts by weight, or, for example, about 1 part by weight to about 15 parts by weight, based on 100 parts by weight of the ink composition. When the content of the scatterer is within any of these ranges, there is an effect of improving the light conversion efficiency according to the use of the scatterer, and because quantum dots of an appropriate ratio may be included, the light conversion efficiency may not be reduced.

[0212] In embodiments, the ink composition may further include various additives, and thus, various modifications to the ink composition are possible. In some embodiments, the ink composition may include a surfactant, an adhesion enhancer, a sensitizer, a stabilizer, or a combination thereof as an additive.

[0213] In some embodiments, the ink composition may further include a surfactant, for example, a fluorine-based surfactant or a silicone-based surfactant, to improve coating properties and leveling performance.

[0214] The fluorine-based surfactant may have a weight average molecular weight of about 4,000 g / mol to about 10,000 g / mol, and specifically may have a weight average molecular weight of about 6,000 g / mol to about 10,000 g / mol. In addition, the fluorine-based surfactant may have a surface tension of about 18 millinewtons / meter (mN / m) to about 23 mN / m (measured in a 0.1% propylene glycol monomethyl ether acetate ("PGMEA") solution). When the weight average molecular weight and surface tension of the fluorine-based surfactant are within these ranges, the leveling performance can be further improved, and stains can be prevented from occurring during coating, and the occurrence of bubbles is relatively small, thereby reducing film defects.

[0215] Examples of commercially available compounds of fluorine-based surfactants may include DIC Products F-114, F-251, F-253, F-281, F-410, F-430, F-477, F-510, F-551, F-552 , F-553, F-554, F-555, F-556, F-557, F-558, F-559, F-560, F-561, F-562, F 3M Products FC-135, FC-170C, FC-430, FC-431, FC-4430, FC-4433; AGC Products S-211, S-221, S-231, S-232, S-241, S-242, S-243, S-420, S-431, S-386, S-611, S-647, S-651, S-653, S-656, S-658, F693; DuPONT products FS-30, FS-65, FS-31, FS-3100, FS-34, FS-35, FS-50, FS-51, FS-60, FS-61, FS-63, FS-64, FS-81, FS-22, and FS-83, but the implementation is not limited thereto.

[0216] In addition, the surfactant may be a silicone-based surfactant. Examples of commercially available compounds of silicone-based surfactants may include Evonik DYNOL products DYNOL 360, DYNOL 604, DYNOL 607, DYNOL 800, DYNOL 810, TEGO products Twin 4000, Twin 4100, Twin 4200; BYK BYK-300, BYK-301, BYK-302, BYK-306, BYK-307, BYK-310, BYK-313, BYK-315N, BYK-320, BYK-322, BYK-323, BYK -325N, BYK-326, BYK-327, BYK-329, BYK-330, BYK-331, BYK-332, BYK-333, BYK-342, BYK-345, BYK-346, BYK-347 , BYK-348, BYK-350, BYK-352, BYK-354, BYK-355, BYK-356, BYK-358N, BYK-359, BYK-360P, BYK-361N, BYK-364P , BYK-366P, BYK-368P, BYK-370, BYK-375, BYK-377, BYK-378, BYK-381, BYK-390, BYK-392 and BYK-394, but the embodiment is not limited thereto.

[0217] The surfactant may be included in an amount of about 0.01 parts by weight to about 5 parts by weight, or specifically, about 0.1 parts by weight to about 2 parts by weight, based on 100 parts by weight of the ink composition.

[0218] According to an embodiment, the ink composition may further include an adhesion enhancer.

[0219] The adhesion enhancer may include, for example, a titanium-based enhancer, an aluminum-based enhancer, or a silane-based adhesion enhancer.

[0220] Examples of the silane-based adhesion enhancer may include epoxy-based silane adhesives such as 3-glycidyloxypropyltrimethoxysilane, 3-glycidyloxypropyltriethoxysilane, 3-glycidyloxypropyl(dimethoxy)methylsilane, or 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane; mercapto-based silane adhesives such as 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-mercaptopropylmethyldimethoxysilane, or 11-mercaptoundecyltrimethoxysilane; amino-based silane adhesives such as 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyldimethoxymethylsilane, N-phenyl-3-aminopropyltrimethoxysilane, N-methylaminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, or N-(2 -aminoethyl)-3-aminopropyldimethoxymethylsilane; ureide-based silane adhesives, such as 3-ureidepropyltriethoxysilane; vinyl-based silane adhesives, such as vinyltrimethoxysilane, vinyltriethoxysilane, vinylmethyldiethoxysilane; styrene-based silane adhesives, such as p-styrenetrimethoxysilane; acrylate-based silane adhesives, such as 3-acryloxypropyltrimethoxysilane or 3-methacryloxypropyltrimethoxysilane; isocyanate-based silane adhesives, such as 3-isocyanatepropyltrimethoxysilane; sulfide-based silane adhesives, such as bis(triethoxysilylpropyl)disulfide, bis(triethoxysilylpropyl)tetrasulfide; phenyltrimethoxysilane, methacryloxypropyltrimethoxysilane, imidazole silane and triazine silane, but the embodiment is not limited thereto.Examples of the adhesion enhancer include Shin Etsu KBM-1003, KBE-1003, KBM-303, KBM-402, KBM-403, KBE-402, KBE-403, KBM-1403, KBM-502, KBM-503, KBE-502, KBE-503, KBM-5103, KBM602, KBM-603, KBM-903, KBE-903, KBE-9103P, KBM-573, KBM-575, KBE-585, KBE-9007N, KBM-9659, KBM-802, and KBM-803 as commercially available compounds; Gelest SIA02000.0, SIS6964.0, SIA08591.0, SIS6964.0, SIB1824.5, SIA0591.0, SIT8192.6, SIG5840. 0, SIB1834.0, SIE4668.0, SIA0599.2, SIC2295.5, SIB1833.0, SIA0611.0, SIG5840.0, SIB1140. 0, SIB1833.0, SIS6990.0, SIB1832.0, SIE4670.0, SIM6487.4, SIB1828.0, SIM6487.4, SIS6994.0, SIB1140.0, SIM6476.0, SIU9058.0, SII6455.0, SIT8717.0, SSP-055, SIA0780.0 and VEE-005; KCC SA6112C, SA1003O, SA0004O, SA3003O, SA4003O, SA1003M, SB1003M, SB1013E, SB1022M, SB2003M and SB3003M, but the implementation scheme is not limited to this.

[0221] Based on 100 parts by weight of the ink composition, about 0.1 parts by weight to about 10 parts by weight, or specifically, about 0.5 parts by weight to about 5 parts by weight of the adhesion enhancer may be included. Based on 100 parts by weight of the sum of the first monomer and the second monomer in the ink composition, about 0.1 parts by weight to about 10 parts by weight, or specifically, about 0.5 parts by weight to about 5 parts by weight of the adhesion enhancer may be included. Based on 100 parts by weight of the sum of the first monomer, the second monomer, and the third monomer in the ink composition, about 0.1 parts by weight to about 10 parts by weight, or specifically, about 0.5 parts by weight to about 5 parts by weight of the adhesion enhancer may be included.

[0222] According to an embodiment, the ink composition may further include a sensitizer. The sensitizer may further improve the polymerization initiation efficiency of the polymerization initiator, thereby accelerating the curing reaction of the ink composition.

[0223] The sensitizer can supplement the curability in long wavelength light of 300 nm or more. The sensitizer can be a compound that absorbs wavelengths of about 250 nm to about 405 nm, about 300 nm to about 405 nm, or about 350 nm to about 395 nm.

[0224] Examples of the sensitizer include anthracene-based compounds such as 9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 9,10-dibutoxyanthracene, and 2-ethyl-9,10-dimethoxyanthracene; benzophenone-based compounds such as 4,4-bis(dimethylamino)benzophenone, 4,4-bis(diethylamino)benzophenone, 2,4,6-trimethylaminobenzophenone, methyl o-benzoylbenzoate, 3,3-dimethyl-4-methoxybenzophenone, and 3,3,4,4-tetrakis(tert-butylperoxycarbonyl)benzophenone; ketone-based compounds such as dimethoxyacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenyl 1-Hydroxypropan-1-one and acetone; fluorenone-based compounds such as 9-fluorenone, 2-chloro-9-fluorenone and 2-methyl-9-fluorenone; thioxanthone-based compounds such as thioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 1-chloro-4-propoxythioxanthone, isopropylthioxanthone (ITX) and diisopropylthioxanthone; xanthone-based compounds such as xanthone and 2-methylxanthone; anthraquinone-based compounds such as anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, tert-butylanthraquinone and 2,6-dichloro-9,10-anthraquinone; acridine-based compounds such as 9-phenylacridine, 1,7-bis(9-acridinyl)heptane, 1, 5-bis(9-acridylpentane) and 1,3-bis(9-acridyl)propane; dicarbonyl compounds such as benzyl, 1,7,7-trimethyl-bicyclo[2,2,1]heptane-2,3-dione, 9,10-phenanthrenequinone; phosphine oxide-based compounds such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide and bis(2,6-dimethoxybenzoyl)-2,4,4-trimethylpentylphosphine oxide; benzoate-based compounds such as methyl 4-(dimethylamino)benzoate, ethyl 4-(dimethylamino)benzoate and 2-n-butyloxyethyl 4-(dimethylamino)benzoate; amino-based compounds such as 2,5-bis(4- cyclopentanone, 2,6-bis(4-diethylaminobenzylidene)cyclohexanone and 2,6-bis(4-diethylaminobenzylidene)-4-methyl-cyclopentanone; coumarin-based compounds such as 3,3-carbonylvinyl-7-(diethylamino)coumarin, 3-(2-benzothiazolyl)-7-(diethylamino)coumarin, 3-benzoyl-7-(diethylamino)coumarin and 3-benzoyl-7-methoxy-coumarin; chalcone compounds such as 4-diethylaminochalcone and 4-azidobenzylideneacetophenone; 2-benzoylmethylene; and 3-methyl-β-naphthothiazoline, but the embodiment is not limited thereto.

[0225] The sensitizer may be included in an amount of about 0.05 to about 3 parts by weight, or specifically, about 0.1 to about 1 part by weight, based on 100 parts by weight of the ink composition. When the content of the sensitizer is within this range, the sensitization effect may be sufficiently obtained, and light may be transmitted to a deep portion.

[0226] According to an embodiment, the ink composition may further include a stabilizer, such as an antioxidant, an ultraviolet absorber, and / or an anti-agglomeration agent. The stabilizer may be used to extend the shelf life of the ink composition.

[0227] Examples of antioxidants include 2,6-di-tert-butyl-4-methylphenol, 3,5-di-tert-butyl-4-hydroxybenzaldehyde, 2-tert-butyl-4-methoxyphenol, 1,3,5-tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5-triazine-2,4,6-trione, [3-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxy]-2,2-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl]propyl]3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, [3-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl]propyl]3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy]-2,2-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxymethyl]propyl]3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tris(2,4-di-tert-butylphenyl) phosphite, (4,4'-thio-bis(2-tert-butyl-5-methylphenol, 2,2'-thio-bis(4-methyl-6-tert-butylphenol) and 2,6-di-tert-butyl-4-methylphenol, but the embodiment is not limited thereto.

[0228] Examples of ultraviolet absorbers include 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzothiazole, alkoxybenzophenone bis(2,2,6,6-tetramethylpiperidin-4-yl)sebacate, 2-hydroxy-2-methylpropane, bis(3,3,5,5-tetramethylpiperidin-4-yl)sebacate, and 4-methylhexyl-3-[3-(benzothiazol-2-yl)-5-tert-butyl-4-hydroxyphenyl]propionate), but the embodiment is not limited thereto.

[0229] The anti-agglomeration agent may include sodium polyacrylate, etc., but the embodiment is not limited thereto.

[0230] The stabilizer may be about 0.05 parts by weight to about 10 parts by weight, specifically about 0.1 parts by weight to about 5 parts by weight, or more specifically about 0.1 parts by weight to about 3 parts by weight, based on 100 parts by weight of the ink composition.

[0231] The viscosity of the ink composition may be 80 centipoise (cP) or less, specifically about 10 cP to about 80 cP, about 20 cP to about 80 cP, or about 20 cP to about 70 cP at 25° C. The ink composition satisfying the viscosity range may be suitable for manufacturing a film by using a solution process (e.g., inkjet printing).

[0232] The ink composition may have a surface tension of about 10 dyne / cm to about 40 dyne / cm at room temperature. The ink composition satisfying the surface tension range may be suitable for manufacturing a film by using a solution process (eg, inkjet printing method).

[0233] The ink composition may be passed through a filter having a pore size of 20 micrometers (μm) or less, specifically 5 μm or less.

[0234] [membrane]

[0235] Hereinafter, a film formed using the ink composition will be described.

[0236] The film may be formed by curing the ink composition described above. That is, the film may include a cured product of the ink composition.

[0237] According to the embodiment, a film may be formed by providing an ink composition on a substrate to form a pattern; and curing the pattern.

[0238] According to the embodiment, the ink composition may be provided by a solution process to form a pattern. The solution process may be inkjet printing, spin coating, slit coating, drop casting, casting, gravure coating, rod coating, roller coating, dip coating, spray coating, screen coating, flexographic printing, offset printing or nozzle printing, but is not limited thereto.

[0239] In an embodiment, the solution process can be performed by inkjet printing, but is not limited thereto. For example, the ink composition can be provided by ejecting droplets into a predetermined area on a substrate in the form of droplets by inkjet printing. In some embodiments, the ink composition can be provided on a substrate by inkjet printing with a thickness of about 0.5 μm to about 20 μm.

[0240] Since the ink composition has excellent inkjet ejection stability, the ink composition may be suitably used for inkjet printing.

[0241] The inkjet printing method may use an inkjet printer having an inkjet head equipped with a piezoelectric type nozzle that applies pressure according to a voltage.

[0242] In embodiments, the ink composition is ejected from nozzles of an inkjet head onto a substrate.

[0243] The ejection amount of the ink composition may be about 1 picoliter / time (pL / time) to about 80 pL / time, for example, about 1 pL / time to about 30 pL / time, or for example, 1 pL / time to 20 pL / time.

[0244] The aperture of the inkjet head may be about 5 micrometers (μm) to about 100 μm, for example, about 10 μm to about 80 μm, to reduce nozzle clogging and improve ejection accuracy, but the embodiment is not limited thereto.

[0245] Based on the shear rate, the jetting pressure of the inkjet head can be 1,000s -1 Up to 100,000s -1 , but the implementation scheme is not limited thereto.

[0246] The temperature at the ejection point is not particularly limited, but from the viewpoint of suppressing crystallization of the material contained in the ink composition, the temperature may be about 10°C to about 120°C, for example, about 15°C to about 60°C, for example, about 15°C to about 40°C, or for example, about 20°C to about 35°C.

[0247] According to the embodiment, in the curing of the pattern, a photocuring process or a thermosetting process may be used, but when an organic compound sensitive to heat is adjacent to the pattern, a photocuring process may be preferred. The curing of the pattern may be performed by irradiating light having an intensity of about 1 W to about 500 W and / or a wavelength of about 250 nm to about 450 nm, but the embodiment is not limited thereto.

[0248] In an embodiment, the substrate may be an electrode of a light emitting device, but embodiments of the present disclosure are not limited thereto.

[0249] According to the embodiment, the ink composition may be provided on an electrode having a thickness of about 1 μm to about 100 μm, or, for example, about 5 μm to about 20 μm.

[0250] [Electronic equipment]

[0251] Hereinafter, an electronic device including the above-described film will be described.

[0252] An electronic device may include: the film; and a light emitting device including a first electrode, a second electrode, and an intermediate layer between the first electrode and the second electrode.

[0253] In an embodiment, the electronic device may include a liquid crystal display device ("LCD"), an organic light emitting display device ("OLED"), or an inorganic light emitting display device.

[0254] For example, when the electronic device further includes liquid crystal, the electronic device may be a liquid crystal display device (LCD). In this embodiment, a light emitting device may be used as a light source, and the film may be included outside the light emitting device and the liquid crystal to serve as a color conversion member.

[0255] In an embodiment, in the case where the intermediate layer of the light-emitting device includes an emission layer and the emission layer contains an organic material, the electronic device can be an organic light-emitting display device. In such an embodiment, the light-emitting device can be used as a light source, and the film can be included outside the light-emitting device to be used as a color conversion member.

[0256] In an embodiment, in the case where the intermediate layer of the light-emitting device includes an emissive layer and the emissive layer includes an inorganic material (e.g., a film), the electronic device can be an inorganic light-emitting display device. In such an embodiment, the light-emitting device can be used as a light source, and the film can be included outside the light-emitting device to be used as a color conversion member.

[0257] In addition to the light emitting device described above, the electronic device may further include a thin film transistor (not shown). The thin film transistor may include a source electrode, a drain electrode and an active layer, wherein one of the source electrode and the drain electrode may be electrically connected to one of the first electrode and the second electrode of the light emitting device.

[0258] The thin film transistor may further include a gate electrode, a gate insulating film, and the like.

[0259] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, and an oxide semiconductor.

[0260] The electronic device may further include an encapsulation unit for sealing the light emitting device. The encapsulation unit may allow light to be transmitted from the light emitting device to the outside, and at the same time prevent air and moisture from penetrating into the light emitting device. The encapsulation unit may be a sealing substrate including a transparent glass or plastic substrate. The encapsulation unit may be a thin film encapsulation layer including at least one of an organic layer and / or an inorganic layer. When the encapsulation unit is a thin film encapsulation layer, the electronic device may be flexible.

[0261] Depending on the purpose of the electronic device, various functional layers can be provided on the packaging unit. Examples of functional layers include color filters, color conversion layers, touch screen layers, and polarization layers. The touch screen layer can be a resistive touch screen layer, a capacitive touch screen layer, or an infrared beam touch screen layer.

[0262] [ Figure 1 Description]

[0263] In the following, reference will be made to Figure 1 The electronic device 3 according to the embodiment is described in detail.

[0264] The electronic device 3 includes a light emitting device 320 and a first substrate 340 .

[0265] The film may be included outside the light emitting device 320 (ie, on the first electrode and / or the second electrode). In detail, the film may be included in the first substrate 340 located outside the light emitting device 320. The first substrate 340 may serve as a color conversion member, and the light emitting device 320 may serve as a light source.

[0266] The light emitting device 320 may include a first electrode 321 , a second electrode 323 , and an intermediate layer 322 between the first electrode 321 and the second electrode 323 .

[0267] The electronic device 3 may be an organic light emitting display device. Therefore, the light emitting device 320 may include an organic emission layer in the intermediate layer 322 .

[0268] The pixel defining layer 330 may be located on the first electrode 321. The pixel defining layer 330 exposes a region of the first electrode 321, and the intermediate layer 322 may be disposed in the exposed region thereof.

[0269] According to the embodiment, one region 341 of the first substrate 340 may include a film. In this case, the first substrate 340 may be positioned in a direction in which light emitted by the light emitting device 320 travels. That is, the film may be located outside the light emitting device 320 and in a direction in which light emitted by the light emitting device 320 travels.

[0270] The film may absorb the first color light to emit the second color light.Thus, the first substrate 340 may be designed to absorb the first color light and emit the second color light selected from a wide range of colors.

[0271] In an embodiment, the first substrate 340 may further include a scatterer.

[0272] According to the embodiment, the first substrate 340 may include a plurality of sub-pixel regions that may be spaced apart from each other. The first substrate 340 may include: a first region for emitting a first color light; a second region for emitting a second color light; and / or a third region for emitting a third color light, which correspond to a plurality of sub-pixel regions, respectively, and the first color light, the second color light, and / or the third color light may have different maximum emission wavelengths. In some embodiments, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. At least one of the first to third regions may correspond to a zone 341. In the first to third regions, the remainder that does not correspond to a zone 341 is other regions (not shown). Other regions may not include a film, and other regions may transmit light from a light-emitting device (not shown).

[0273] In an embodiment, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include quantum dots. The first region, the second region, and / or the third region may each further include an emitter. In such an embodiment, the third region may transmit light from the light emitting device.

[0274] In some embodiments, the light emitting device may emit a first light, the first region may absorb the first light to emit 1-1 color light, the second region may absorb the first light to emit 2-1 color light, and the third region may absorb the first light to emit 3-1 color light. In such embodiments, the 1-1 color light, the 2-1 color light, and the 3-1 color light may each have a different maximum emission wavelength. In some embodiments, the first light may be blue light, the 1-1 color light may be red light, the 2-1 color light may be green light, and the 3-1 light may be blue light.

[0275] According to the embodiment, in the first substrate 340 , a light blocking pattern 344 may be further disposed between one region 341 and the other regions.

[0276] In an embodiment, the electronic device 3 may further include a second substrate 310 .

[0277] In the embodiment, the second substrate (310) may include a thin film transistor (not shown). As described above, the thin film transistor may include a source electrode, a drain electrode and an active layer, and one of the source electrode and the drain electrode may be electrically connected to one of the first electrode (321) and the second electrode (323) of the light emitting device. The thin film transistor may further include a gate electrode, a gate insulating film, etc.

[0278] [ Figure 2 Description]

[0279] In the following, reference will be made to Figure 2 The electronic device 4 according to the embodiment is described in detail.

[0280] The electronic device 4 includes a first substrate 410 and a light emitting device 420 .

[0281] The light emitting device 420 may include a first electrode 421 , a second electrode 423 , and an intermediate layer 422 between the first electrode 421 and the second electrode 423 .

[0282] The film may be included in the intermediate layer 422 , specifically, in the emission layer included in the intermediate layer 422 .

[0283] The film may emit visible light when an electric field is applied between the first electrode 421 and the second electrode 423. Therefore, the light emitting device 420 may be designed to emit a wide color range wavelength.

[0284] The intermediate layer 422 may further include an auxiliary layer between the emission layer and the first electrode and / or between the emission layer and the second electrode. The auxiliary layer may directly contact the emission layer. The auxiliary layer may improve the thin film properties of the emission layer.

[0285] The intermediate layer 422 may further include a first charge transfer region between the emission layer and the first electrode and / or a second charge transfer region between the emission layer and the second electrode.

[0286] [ Figure 3 Description]

[0287] Figure 3 1 is a schematic cross-sectional view of the light emitting device described above. The light emitting device 10 may include a first electrode 110 , an intermediate layer 130 , and a second electrode 150 .

[0288] In the following, reference will be made to Figure 3 The structure and manufacturing method of the light emitting device 10 are described.

[0289] [First electrode 110]

[0290] exist Figure 3 In the embodiment, the substrate may be additionally located below the first electrode 110 or above the second electrode 150 .

[0291] The first electrode 110 may be formed by depositing or sputtering, on a substrate, a material for forming the first electrode 110. When the first electrode 110 is an anode, a high work function material into which holes can be easily injected may be used as a material for the first electrode.

[0292] [Middle layer 130]

[0293] The intermediate layer 130 may be on the first electrode 110. The intermediate layer 130 may include an emission layer.

[0294] The intermediate layer 130 refers to a single layer and / or a plurality of layers located between the first electrode 110 and the second electrode 150 in the light emitting device 10. The material included in the intermediate layer 130 may be an organic material and / or an inorganic material.

[0295] The intermediate layer 130 may further include a hole transport region between the first electrode 110 and the emission layer and an electron transport region between the emission layer and the second electrode 150 .

[0296] The intermediate layer 130 may further include a metal-containing compound (eg, an organic metal compound), an inorganic material (eg, quantum dots), and the like, in addition to various organic materials.

[0297] The intermediate layer 130 may include: i) at least two emission units sequentially stacked between the first electrode 110 and the second electrode 150; and ii) a charge generation layer located between the at least two emission units. When the intermediate layer 130 includes at least two emission units and the charge generation layer, the light emitting device 10 may be a tandem light emitting device.

[0298] [Hole Transport Region in Intermediate Layer 130]

[0299] The hole transport region may have i) a single-layer structure consisting of a single layer consisting of a single material, ii) a single-layer structure consisting of a single layer containing a plurality of different materials, or iii) a multi-layer structure having a plurality of layers containing a plurality of different materials.

[0300] The hole transport region may include a hole injection layer, a hole transport layer, an emission assisting layer, an electron blocking layer, or a combination thereof.

[0301] For example, the hole transport region may have a multi-layer structure, such as a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission assisting layer structure, a hole injection layer / emission assisting layer structure, a hole transport layer / emission assisting layer structure or a hole injection layer / hole transport layer / emission assisting layer structure, wherein the layers of each structure are stacked in sequence on the first electrode 110 in their respective prescribed orders.

[0302] The thickness of the hole transport region may be about to about And in some embodiments, about to about When the hole transport region includes a hole injection layer, a hole transport layer, or a combination thereof, the thickness of the hole injection layer may be about to about And in some embodiments, about to about And the thickness of the hole transport layer can be about to about And in some embodiments, about to about When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within any of these ranges, excellent hole transport characteristics may be obtained without a significant increase in driving voltage.

[0303] [Emitting Layer in Intermediate Layer 130]

[0304] When the light emitting device 10 is a full-color light emitting device, the emission layer may include emission layers for emitting different colors according to respective sub-pixels.

[0305] In some embodiments, the emission layer may be patterned into a first color emission layer, a second color emission layer, and a third color emission layer according to sub-pixels.

[0306] According to an embodiment, at least one of the emission layers may include a film formed using an ink composition. In some embodiments, the first color emission layer may be an inorganic emission layer containing quantum dots, and the second color emission layer and the third color emission layer may be organic emission layers each containing a different organic compound. In this embodiment, the first color to the third color may be different from each other, and in some embodiments, the first color to the third color may each have a different maximum emission wavelength. The first color to the third color may be combined into white.

[0307] In some embodiments, the first color emission layer, the second color emission layer, and the third color emission layer may each be an organic emission layer including an organic compound.

[0308] In some embodiments, the emission layer may further include a fourth color emission layer, at least one of the first color emission layer to the fourth color emission layer may be an inorganic dot emission layer containing quantum dots, and the other emission layers may be organic emission layers each containing an organic compound. Such changes may be made. In this embodiment, the first color to the fourth color may be different from each other, and in some embodiments, the first color to the fourth color may each have a different maximum emission wavelength. The first color to the fourth color may be combined into white.

[0309] In one or more than one embodiments, the light emitting device may have a stacked structure in which two or more emission layers for emitting light of the same or different colors are in contact with each other or separated from each other. At least one of the at least two emission layers may be an inorganic emission layer containing quantum dots, and the other emission layer may be an organic emission layer containing organic compounds. Such changes may be made. In detail, the light emitting device includes a first color emission layer and a second color emission layer, and the first color and the second color may be the same color or different colors. More specifically, when the first color and the second color are the same, the first color and the second color may each be blue. In an embodiment, in the case where the first color and the second color are different from each other, the first color and the second color may be combined into white. In some embodiments, when the first color and the second color are different colors, the first color may be blue, and the second color may be green or red.

[0310] When the emission layer is an organic emission layer, the emission layer may include a host and a dopant. The dopant may be a phosphorescent dopant, a fluorescent dopant, a delayed fluorescent dopant, or a combination thereof.

[0311] The amount of the host in the emission layer may be greater than the amount of the dopant in the emission layer. In some embodiments, the amount of the dopant in the emission layer may be about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host.

[0312] In some embodiments, when the emission layer is an inorganic emission layer, the emission layer may include quantum dots. Specifically, the ink composition may include a film formed using the ink composition.

[0313] The emission layer may contain a delayed fluorescent material. The delayed fluorescent material may act as a host or a dopant in the emission layer, and may be a delayed fluorescent host or a delayed fluorescent dopant according to the purpose of use.

[0314] The thickness of the emission layer can be about to about And in some embodiments, about to about When the thickness of the emission layer is within any of these ranges, improved light emitting characteristics may be obtained without a significant increase in driving voltage.

[0315] [Electron Transport Region in Intermediate Layer 130]

[0316] The electron transport region may have i) a single-layer structure consisting of a single layer consisting of a single material, ii) a single-layer structure consisting of a single layer containing a plurality of different materials, or iii) a multi-layer structure having a plurality of layers containing a plurality of different materials.

[0317] The electron transport region may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or an electron injection layer.

[0318] In some embodiments, the electron transport region may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, or a buffer layer / electron transport layer / electron injection layer structure, wherein the layers of each structure are stacked in sequence on the emission layer in their respective prescribed orders.

[0319] The thickness of the electron transport region may be about to about And in some embodiments, about to about When the electron transport region includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or a combination thereof, the thickness of the buffer layer, the hole blocking layer, or the electron control layer may be each independently about to about For example, about to about And the thickness of the electron transport layer can be about to about For example, about to about When the thickness of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer and / or the electron transport layer are each within these ranges, excellent electron transport characteristics may be obtained without a significant increase in driving voltage.

[0320] [Second electrode 150]

[0321] The second electrode 150 may be on the intermediate layer 130. In an embodiment, the second electrode 150 may be a cathode as an electron injection electrode. In this embodiment, the material used to form the second electrode 150 may be a material having a low work function, such as a metal, an alloy, a conductive compound, or a combination thereof.

[0322] The second electrode 150 may have a single-layer structure or a multi-layer structure including two or more layers.

[0323] [Overlay]

[0324] The first covering layer may be located outside the first electrode 110, and / or the second covering layer may be located outside the second electrode 150. In some embodiments, the light emitting device 10 may have a structure in which the first covering layer, the first electrode 110, the intermediate layer 130, and the second electrode 150 are stacked in this specified order, a structure in which the first electrode 110, the intermediate layer 130, the second electrode 150 and the second covering layer are stacked in this specified order, or a structure in which the first covering layer, the first electrode 110, the intermediate layer 130, the second electrode 150 and the second covering layer are stacked in this specified order.

[0325] In the light emitting device 10, light emitted from the emission layer in the intermediate layer 130 may pass through the first electrode 110 (which may be a semi-transmissive electrode or a transmissive electrode) and through the first cover layer to the outside. In the light emitting device 10, light emitted from the emission layer in the intermediate layer 130 may pass through the second electrode 150 (which may be a semi-transmissive electrode or a transmissive electrode) and through the second cover layer to the outside.

[0326] The first cover layer and the second cover layer can improve the external light emitting efficiency based on the principle of constructive interference. Therefore, the optical extraction efficiency of the light emitting device 10 can be increased, thereby improving the light emitting efficiency of the light emitting device 10.

[0327] The first cover layer and the second cover layer may each include a material having a refractive index of 1.6 or greater (at 589 nm).

[0328] The first covering layer and the second covering layer may each independently be an organic covering layer including an organic material, an inorganic covering layer including an inorganic material, or an organic-inorganic composite covering layer including an organic material and an inorganic material.

[0329] [Electronic equipment]

[0330] The light emitting device may be included in various electronic devices. In the embodiment, the electronic device including the light emitting device may be a display device, a light emitting device, a verification device, etc.

[0331] In addition to the light-emitting device, the electronic device (e.g., a light-emitting device) may further include: i) a color filter, ii) a color conversion layer, or iii) a color filter and a color conversion layer. The color filter and / or the color conversion layer may be arranged in at least one direction of travel of the light emitted from the light-emitting device. For example, the light emitted from the light-emitting device may be blue light or white light. The light-emitting device may be understood by reference to the description provided herein. In an embodiment, the color conversion layer may include quantum dots, and the color conversion layer may be a film formed by an ink composition as described herein.

[0332] The electronic device may include a first substrate. The first substrate may include a plurality of sub-pixel regions, the color filter may include a plurality of color filter regions respectively corresponding to the plurality of sub-pixel regions, and the color conversion layer may include a plurality of color conversion regions respectively corresponding to the plurality of sub-pixel regions.

[0333] A pixel defining film may be located between the plurality of sub-pixel regions to define each sub-pixel region.

[0334] The color filter may further include a plurality of color filter regions and a light blocking pattern between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light blocking pattern between the plurality of color conversion regions.

[0335] In addition to the light emitting device, the electronic device may further include a thin film transistor. The thin film transistor may include a source electrode, a drain electrode, and an active layer, wherein one of the source electrode and the drain electrode may be electrically connected to one of the first electrode and the second electrode of the light emitting device.

[0336] The thin film transistor may further include a gate electrode, a gate insulating film, and the like.

[0337] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, and an oxide semiconductor.

[0338] The electronic device may further include an encapsulation unit for sealing the light-emitting device. The encapsulation unit may be located between the color filter and / or the color conversion layer and the light-emitting device. The encapsulation unit may allow light to be transmitted from the light-emitting device to the outside, and at the same time prevent air and moisture from penetrating into the light-emitting device. The encapsulation unit may be a sealing substrate including a transparent glass or plastic substrate. The encapsulation unit may be a thin film encapsulation layer including at least one of an organic layer and / or an inorganic layer. When the encapsulation unit is a thin film encapsulation layer, the electronic device may be flexible.

[0339] In addition to the color filter and / or color conversion layer, various functional layers may be provided on the packaging unit depending on the purpose of the electronic device. Examples of functional layers may include a touch screen layer, a polarization layer, and the like. The touch screen layer may be a resistive touch screen layer, a capacitive touch screen layer, or an infrared beam touch screen layer. The verification device may be, for example, a biometric verification device that identifies an individual based on biometric information (e.g., fingertips, pupils, etc.).

[0340] In addition to the light emitting device described above, the authentication device may further include a biometric information collecting unit.

[0341] The electronic device can be applied to various displays, light sources, lighting equipment, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notepads, electronic dictionaries, electronic game consoles, medical devices (e.g., electronic thermometers, blood pressure meters, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram recorders, ultrasonic diagnostic devices or endoscopic display devices), fish finders, various measuring devices, instruments (e.g., instruments for cars, airplanes or ships) and projectors.

[0342] [Manufacturing method]

[0343] The layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region can be formed in a specific region by using one or more suitable methods (e.g., vacuum deposition, spin coating, casting, Langmuir-Blodgett (“LB”) deposition, inkjet printing, laser printing, and laser induced thermal imaging).

[0344] When the layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region are each formed by vacuum deposition, the deposition temperature may be about 100° C. to about 500° C. ... -8 To about 10 -3 Torr vacuum and about to about Vacuum deposition was performed at a deposition rate of .

[0345] Invention method

[0346] [Example]

[0347] Preparation Example 1: Fabrication of quantum dots containing ligands on the surface

[0348] The InP / ZnSe / ZnS quantum dot dispersion solution prepared according to Chem. Mater. 2017, 29, 6893-6899 Part 2.2 was centrifuged twice using acetone and ethanol, and vacuum dried to obtain InP / ZnSe / ZnS quantum dot powder containing oleic acid ligands on the surface thereof.

[0349] 100 grams (g) of quantum dot powder was dissolved in 125 grams of toluene and 125 grams of hexane, and 30 grams of methoxytetraethylene glycol propionate was added thereto as a ligand containing a polar part. Then, under a nitrogen atmosphere, the temperature was raised to 80°C and the reaction was maintained for 15 hours. Thus, quantum dots containing ligands on the surface were prepared. After hexane was added to the quantum dots containing ligands on the surface, centrifugation was performed to precipitate and purify, and after redispersion in acetone, excess hexane was added again to precipitate for purification and drying. Figure 4 An electron microscope image of quantum dots containing ligands on the surface is shown in FIG.

[0350] Preparation Example 2: Preparation of Scatterer Dispersion

[0351] Titanium dioxide pigment particles as light scattering particles were placed in an oxetane group-containing compound (OXT-221 manufactured by TOAGOSEI) together with a modified polyurethane-based BASF EFKA dispersant and mixed to prepare a titanium dioxide dispersion. Here, the titanium dioxide pigment particles had an average particle size (D50) of 170 nm. 50 parts by weight of the titanium dioxide pigment, 5 parts by weight of the EFKA dispersant and 45 parts by weight of OXT-221 were placed in a bead mill and stirred for 4 hours to prepare a titanium dioxide dispersion.

[0352] Preparation Example 3: Preparation of multifunctional allyl tertiary amine compound 1

[0353] To a 250 mL three-necked round-bottom flask was added 150 mL of saturated KOH solution, and 8.0 g of ethylenediamine, 0.15 g of KI and 0.15 g of (Bu) were added. 4 NBr. 52.77 g of allyl bromide was added dropwise thereto, and the reaction mixture was heated at 65° C. for 48 hours. Thereafter, the reaction mixture was extracted 4 times with diethyl ether (4×50 mL), and the extract was then washed with a saturated NaCl solution. Then, the extract was washed with anhydrous Na 2 SO 4The solvent was dried and evaporated, and the obtained product was purified by column chromatography using hexane:ethyl acetate 9:1 (volume ratio) to obtain N,N,N′,N′-tetraallylethane-1,2-diamine.

[0354] Preparation Example 4: Preparation of multifunctional allyl tertiary amine compound 2

[0355] N-[2-(Diallylamino)ethyl]-N,N′,N′-triallylethane-1,2-diamine was obtained in the same manner as in Preparation Example 3 except that 9.0 g of diethylenetriamine was used instead of 8.0 g of ethylenediamine as the amine compound.

[0356] Examples 1 to 4: Preparation of ink composition for color conversion layer

[0357] The InP / ZnSe / ZnS quantum dots surface-modified with methoxytetraethylene glycol propionate prepared in Preparation Example 1 and the multifunctional thiol compound, the multifunctional allyl tertiary amine compound prepared in Preparation Example 3 or Preparation Example 4, the epoxy compound, the oxetane compound, the polymerization initiator, the scatterer dispersion of Preparation Example 2 and other ingredients are mixed together to prepare an ink composition. Table 1 shows the specific compounds and contents (parts by weight) used in Examples 1 to 4. Table 2 shows the names of the specific compounds represented by the symbols in Table 1. In each composition of Examples 1 to 4 and Comparative Examples 1 to 4, 2 parts by weight of surfactant G1, 0.5 parts by weight of adhesion enhancer H1, 0.5 parts by weight of sensitizer I1 and 0.5 parts by weight of stabilizer J1 are used as other ingredients. The brackets in Table 1 indicate the parts by weight of each ingredient for a total of 100 parts by weight of the ink composition.

[0358] [Table 1]

[0359]

[0360] [Table 2]

[0361]

[0362]

[0363] Evaluation Example 1: Viscosity measurement of composition

[0364] For the ink compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 4, the viscosity was measured at room temperature (25° C.) using a viscometer (Brookfield DV-II, RV-2 rotor).

[0365] Evaluation Example 2: Evaluation of the light conversion efficiency and light absorption rate of quantum dots

[0366] The ink compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were spin-coated to a thickness of 10 μm on each glass substrate having a width and length of 50 millimeters (mm) and a thickness of 0.5 mm. After curing and forming a film by irradiating ultraviolet rays having a wavelength of 395 nm in the atmosphere, the glass substrate was cut so that the central portion of the film was 20 mm in width and length, respectively.

[0367] For the film, the blue light conversion rate was measured using an integrating hemispherical measuring instrument (QE-2100, Otsuka). For this purpose, blue light of 450nm to 460nm was applied to the film, and the amount of applied blue light (A) was measured, and the amount of blue light (A') after passing through the film and the amount of green light captured in all emission directions (B) were calculated as integral values. The light conversion rate (green / blue) from blue light to green light was obtained by equation (1), and the light absorption rate of blue light was obtained by equation (2):

[0368] Light conversion rate (green / blue) = B / (A-A') × 100 (1)

[0369] Light absorption rate = (A-A') / A×100(2)

[0370] When the light conversion rate (green / blue) is 25% or more, this case is represented by O, and when the light conversion rate is less than 25%, this case is represented by X. When the light absorption rate (green / blue) is 70% or more, this case is represented by O, and when the light absorption rate is less than 70%, this case is represented by X.

[0371] Evaluation Example 3: Evaluation of damage during bending

[0372] After the polyester film was bonded to a glass substrate, the curable compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were spin-coated on the polyester film to a thickness of 10 μm. After curing by irradiating ultraviolet rays having a wavelength of 395 nm in the atmosphere to form a coating film, the polyester film was peeled off from the glass substrate.

[0373] The sample was prepared by cutting the film on which the coating film was formed into a size of 20 mm × 100 mm. The sample was mounted in a U-shaped bending tester so that the coated side of the coating film was facing inward, and the bending radius was set to 2 mm, and the coating film was bent 100,000 times at a rate of 1 time / second. Whether the coating film of the bent portion of each film after the bending test was damaged was observed with the naked eye. When no damage was observed during bending, this case was indicated as O, and when damage such as cracks was observed, this case was indicated as X.

[0374] Evaluation Example 4: Visibility of creases

[0375] The folded surface of the sample was visually observed after the bending test of Evaluation Example 3. In the case of observing the sample from the front, when the folded portion was not visually recognized, this case was indicated by O, when the folded portion was faintly visible, this case was indicated by Δ, and when the folded portion was clearly visible, this case was indicated by X.

[0376] Table 3 shows the results of measuring the viscosity, light conversion rate, light absorption rate, damage during bending, and visibility of the folded portion of Examples 1 to 4 and Comparative Examples 1 to 4.

[0377] [Table 3]

[0378]

[0379]

[0380] Referring to the results of Table 3, the light conversion rate from blue to green of the films formed by using Examples 1 to 4 and Comparative Examples 1 to 4 is 30% or higher, and the light absorption rate is 90% or higher, however, it can be seen that the degree of damage and the visibility of the folded part of the films formed by the compositions of Examples 1 to 4 are better than those of the films formed by the compositions of Comparative Examples 1 to 4.

[0381] It should be understood that the embodiments described herein should be considered in a descriptive sense only, and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered to be applicable to other similar features or aspects in other embodiments. Although one or more than one embodiment has been described with reference to the accompanying drawings, it should be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the subject matter and scope defined by the following claims.

Claims

1. An ink composition comprising: A quantum dot comprising at least one organic ligand on its surface; a first monomer comprising at least one epoxy group; a second monomer comprising at least one oxetane group; a third monomer comprising at least one thiol group; and a tertiary amine compound comprising at least one allylamine group; wherein the organic ligand comprises at least one polar portion. 2 . The ink composition of claim 1 , wherein the third monomer comprises a compound having a plurality of thiol groups. 3 . The ink composition of claim 1 , wherein the third monomer comprises a compound including one thiol group and a compound including a plurality of thiol groups.

4. The ink composition according to claim 1, wherein the third monomer is represented by Formula 3-1 or Formula 3-2: Formula 3-1 Formula 3-2 in, In formula 3-1 and formula 3-2, L 31 Is a straight chain or branched C1-C 20 Alkane group, straight or branched C1-C 20 Olefin groups or C6-C 20 Aromatic groups, L 32 and L 33 Each is a single bond, *-O-*' or A 32 yes *-S-*', C3-C 20 Heteroaromatic groups or a31 to a33 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, R 31 To R 35 are independently hydrogen, deuterium, a halogen element, or a linear, branched or cyclic C1-C 20 Alkyl groups, n32 and n33 are each independently 0, 1, 2, 3, 4 or 5, The sum of n32 and n33 is 1 or greater, and * and *' each represent a binding site with an adjacent atom. 5 . The ink composition of claim 1 , wherein the tertiary amine compound comprises a compound including a plurality of allylamine groups. 6 . The ink composition according to claim 1 , wherein the tertiary amine compound includes a compound including one allylamine group and a compound including a plurality of allylamine groups.

7. The ink composition according to claim 1, wherein the tertiary amine compound is represented by Formula 4-1 or Formula 4-2: Formula 4-1 Formula 4-2 in, In formula 4-1 and formula 4-2, L 41 , L 42 and L 43 Each is a direct link, a41 and a42 are each independently 0, 1, 2, 3, 4 or 5, a43 is 1, 2, 3, 4, or 5, R 41 To R 48 Each is independently hydrogen, deuterium, a halogen element, -CH2-CH=CH2, or a substituted or unsubstituted straight-chain, branched or cyclic C1-C 20 Alkyl groups, The straight chain, branched chain or cyclic C1-C 20 Substituents of the alkyl group include deuterium, halogen elements or -N(CH2-CH=CH2)2, and * and *' each represent a binding site with an adjacent atom.

8. The ink composition of claim 1, wherein the quantum dots comprise: II-VI semiconductor compounds; III-V semiconductor compounds; III-VI semiconductor compounds; Group I-III-VI semiconductor compounds; IV-VI semiconductor compounds; Group IV elements or compounds; or a combination thereof.

9. The ink composition of claim 1, wherein the quantum dots have a core-shell structure.

10. The ink composition of claim 1, wherein the at least one polar portion of the organic ligand comprises an alkyl polyol structure.

11. The ink composition according to claim 1, further comprising a photopolymerization initiator.

12. The ink composition of claim 1, wherein the viscosity of the ink composition at a temperature of 25°C is from about 20 centipoise (cP) to about 80 cP. 13 . The ink composition of claim 1 , comprising 2 parts by weight of a solvent based on 100 parts by weight of the ink composition.

14. A film prepared from the ink composition of any one of claims 1 to 13.

15. The film of claim 14, comprising a matrix in which the polyether resin and the polysulfide resin are network-bonded to each other.

16. The film of claim 15, wherein the polyether resin and the polysulfide resin each independently comprise a network structure and a chain structure, and The film further includes a linking portion that cross-links the polyether resin and the polysulfide resin.

17. The membrane of claim 15, wherein the linking moiety comprises an amine group.

18. Electronic equipment, including: A film prepared from the ink composition of claim 1; as well as A light emitting device comprising a first electrode, a second electrode and an intermediate layer between the first electrode and the second electrode, Wherein the film is positioned in the direction of travel of light emitted by the light emitting device.

19. The electronic device of claim 18, wherein the film absorbs light of a first color and emits light of a second color.

20. The electronic device of claim 18, further comprising a thin film transistor, The thin film transistor includes a source electrode and a drain electrode, and the first electrode of the light emitting device is electrically connected to at least one of the source electrode and the drain electrode of the thin film transistor.

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