Resin composition, light conversion layer and light emitting device

Abstract

The present invention provides a resin composition, a light conversion layer, and a light-emitting device. The resin composition includes a quantum dot (A), an alkali-soluble resin (B), an ethylenically unsaturated monomer (C), a photoinitiator (D), a solvent (E), and a phenyl compound (F). The phenyl compound (F) includes at least one of a compound represented by the following formula (F-1) and a compound represented by the following formula (F-2). Based on the total amount of the resin composition used being 100 parts by weight, the amount of the phenyl compound (F) used is 0.05 parts by weight to 5 parts by weight. In formula (F-1) and formula (F-2), the definitions of R<supgt;1< / supgt;, R<supgt;3< / supgt;, R<supgt;4< / supgt;, Y, Z, m, n, and p are the same as those defined in the detailed description.

Description

Technical Field

[0001] The invention relates to a resin composition, and in particular to a resin composition suitable for a light conversion layer, a light conversion layer and a light emitting device. Background Art

[0002] With the development of display device technology, in order to improve the display quality of display devices, a light conversion layer containing quantum dots is set in the display device in recent years to improve the brightness and color purity of the display screen. However, the quantum dot-containing resin composition currently used to manufacture the light conversion layer has the problem of poor storage stability at room temperature, which in turn affects the stability of the light conversion layer manufactured therefrom and the performance of the device using the light conversion layer. Summary of the invention

[0003] In view of this, the present invention provides a resin composition, a light conversion layer and a light emitting device that can form a light emitting device having good viscosity stability, patterning capability, resolution and pattern stability.

[0004] A resin composition of the present invention comprises quantum dots (A), an alkali-soluble resin (B), an ethylenically unsaturated monomer (C), a photoinitiator (D), a solvent (E) and a phenyl compound (F). The phenyl compound (F) comprises at least one of a compound represented by the following formula (F-1) and a compound represented by the following formula (F-2),

[0005]

[0006] In formula (F-1), R 1 is an alkyl group, m is an integer from 0 to 3,

[0007] Z is an alkylene group, *-O-* or a combination thereof, R 2 is hydrogen or an alkyl group,

[0008] When n is 1, Y is hydrogen or alkyl,

[0009] When n is 2, Y is a single bond, an alkylene group, S, or a combination thereof,

[0010] When n is 3, Y is a single bond, a trivalent alkyl group, a trivalent phenyl group, or a combination thereof,

[0011] When n is 4, Y is carbon,

[0012] * indicates the bond position;

[0013]

[0014] In formula (F-2), R 3is an alkyl group, R 4 is hydrogen or phenyl, p is 0 or 1, and the amount of the phenyl compound (F) is 0.05 to 5 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0015] In one embodiment of the present invention, the quantum dots (A) include at least one selected from the group consisting of green quantum dots and red quantum dots. The emission wavelength of the green quantum dots is in the range of greater than or equal to 500 nanometers to less than 600 nanometers. The emission wavelength of the red quantum dots is in the range of greater than or equal to 600 nanometers to less than or equal to 800 nanometers.

[0016] In one embodiment of the present invention, the phenyl compound (F) comprises at least one selected from the group consisting of the following compounds:

[0017]

[0018]

[0019]

[0020]

[0021] In one embodiment of the present invention, the resin composition further comprises a scatterer (G). Based on 100 parts by weight of the total amount of the resin composition, the amount of the scatterer (G) is 0.1 parts by weight to 10 parts by weight.

[0022] In one embodiment of the present invention, the resin composition further comprises a scatterer (G). The scatterer (G) comprises at least one selected from the group consisting of titanium dioxide, silicon dioxide, barium titanate, zirconium oxide, zinc oxide and aluminum oxide.

[0023] In one embodiment of the present invention, based on the total amount of the resin composition used being 100 parts by weight, the amount of quantum dots (A) used is 0.5 parts by weight to 15 parts by weight, the amount of alkali-soluble resin (B) used is 0.5 parts by weight to 20 parts by weight, the amount of ethylenically unsaturated monomer (C) used is 0.5 parts by weight to 20 parts by weight, and the amount of photoinitiator (D) used is 0.01 parts by weight to 5 parts by weight.

[0024] In one embodiment of the present invention, based on 100 parts by weight of the total amount of the resin composition, the amount of the solvent (E) is 65 parts by weight to 85 parts by weight.

[0025] A light conversion layer of the present invention is formed from the above resin composition.

[0026] In one embodiment of the present invention, the light conversion layer further includes a red pattern layer, a green pattern layer and a scatterer pattern layer. The red pattern layer includes red quantum dots. The green pattern layer includes green quantum dots. The scatterer pattern layer does not contain quantum dots.

[0027] In one embodiment of the present invention, the emission wavelength of the green quantum dots is in the range of greater than or equal to 500 nanometers to less than 600 nanometers, and the emission wavelength of the red quantum dots is in the range of greater than or equal to 600 nanometers to less than or equal to 800 nanometers.

[0028] A light emitting device of the present invention comprises the above-mentioned light conversion layer.

[0029] In one embodiment of the present invention, the light emitting device further comprises a substrate and a backlight module. The light conversion layer is located on the substrate. The backlight module is disposed on a side of the substrate where the light conversion layer is disposed.

[0030] In one embodiment of the present invention, the light emitting device further comprises a filter layer. The filter layer is located between the substrate and the light conversion layer. The filter layer comprises a red filter pattern, a green filter pattern and a blue filter pattern. The red filter pattern, the green filter pattern and the blue filter pattern do not contain quantum dots.

[0031] Based on the above, the resin composition of the present invention uses a phenyl compound (F) of a specific structure, and based on the total amount of the resin composition used being 100 parts by weight, the amount of the phenyl compound (F) used is 0.05 parts by weight to 5 parts by weight. Thereby, the resin composition can have good viscosity stability and patterning ability, and when the resin composition is used to form a light conversion layer, the light conversion layer can have good resolution and pattern stability, and is suitable for light emitting devices.

[0032] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are specifically described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a light emitting device according to an embodiment of the present invention.

[0034] Figure 2 is a schematic diagram of a light emitting device according to another embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 10, 20: Light emitting device

[0037] 120: Substrate

[0038] 140: Filter layer

[0039] 142: Red filter pattern

[0040] 144: Green filter pattern

[0041] 146: Blue filter pattern

[0042] 148: Shading pattern

[0043] 160: Light conversion layer

[0044] 162: Red pattern layer

[0045] 164: Green pattern layer

[0046] 166: Scattering pattern layer

[0047] 168: Bank layer

[0048] 200: Backlight module DETAILED DESCRIPTION

[0049] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. In the accompanying drawings, the thickness of layers, films, panels, regions, etc., is exaggerated for clarity. Throughout the specification, the same reference numerals represent the same components.

[0050] <Resin composition>

[0051] The present invention provides a resin composition, comprising quantum dots (A), an alkali-soluble resin (B), an ethylenically unsaturated monomer (C), a photoinitiator (D), a solvent (E), and a phenyl compound (F). In addition, the resin composition of the present invention may further comprise a scatterer (G) and an additive (H) such as a leveling agent as needed. The above-mentioned various components will be described in detail below.

[0052] It should be noted that, hereinafter, (meth)acrylic acid refers to acrylic acid and / or methacrylic acid, and (meth)acrylate refers to acrylate and / or methacrylate.

[0053] Quantum dot(A)

[0054] In the present embodiment, the quantum dots (A) may include at least one selected from the group consisting of green quantum dots and red quantum dots. Green quantum dots and red quantum dots can absorb light (e.g., blue light) emitted by the backlight module, and emit green light and red light respectively after energy conversion. The emission wavelength of the green quantum dots may be in the range of greater than or equal to about 500 nanometers to less than about 600 nanometers. The emission wavelength of the red quantum dots may be in the range of greater than or equal to about 600 nanometers to less than or equal to about 800 nanometers. In the present embodiment, the emission wavelength of the quantum dots can be adjusted according to demand. For example, the emission wavelength of the quantum dots can be adjusted according to the purpose of the light emitting device of the light conversion layer formed using the resin composition.

[0055] For example, quantum dots (A) may include quantum dots composed of group II-VI elements, quantum dots composed of group III-V elements, or other suitable quantum dots. The quantum dots may be single-layer quantum dots or multi-layer quantum dots. The multi-layer quantum dots may have a core-shell structure.

[0056] There is no particular limitation on the quantum dots composed of group II-VI elements, and appropriate quantum dots composed of group II-VI elements can be selected according to the needs. For example, the quantum dots composed of group II-VI elements may include CdS, CdSe, CdTe, ZnS, ZnSe, HgS or other suitable quantum dots. The quantum dots composed of group II-VI elements can be used alone or in combination.

[0057] There is no particular limitation on the quantum dots composed of group III-V elements, and appropriate quantum dots composed of group III-V elements can be selected according to the needs. For example, the quantum dots composed of group III-V elements may include InP, InAs or other suitable quantum dots. The quantum dots composed of group III-V elements may be used alone or in combination.

[0058] The quantum dots (A) are used in an amount of 0.5 to 15 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0059] Alkali soluble resin (B)

[0060] There is no particular limitation on the alkali-soluble resin (B), and an appropriate alkali-soluble resin can be selected according to the requirements. In the present embodiment, the alkali-soluble resin (B) can be a (meth) acrylic resin. For example, the alkali-soluble resin (B) can be composed of (meth) acrylic acid, (meth) acrylic acid alkyl ester, hydroxyl-containing (meth) acrylic ester, ether-containing (meth) acrylic ester, alicyclic (meth) acrylic ester or other suitable monomers. The alkali-soluble resin (B) can be composed of a single monomer or a plurality of monomers.

[0061] The alkyl (meth)acrylate may include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, tert-butyl (meth)acrylate, benzyl (meth)acrylate, lauryl (meth)acrylate, or other suitable alkyl (meth)acrylates.

[0062] The hydroxyl-containing (meth)acrylate may include hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, or other suitable hydroxyl-containing (meth)acrylate.

[0063] The ether group-containing (meth)acrylate may include ethoxyethyl (meth)acrylate, glycidyl (meth)acrylate, or other suitable ether group-containing (meth)acrylate.

[0064] The alicyclic (meth)acrylate may include cyclohexyl (meth)acrylate, isophorone (meth)acrylate, dicyclopentadienyl (meth)acrylate, or other suitable alicyclic (meth)acrylates.

[0065] For example, the alkali-soluble resin (B) may be one alkali-soluble resin or a combination of multiple alkali-soluble resins. For example, the alkali-soluble resin (B) may be the following alkali-soluble resin (B-1), the following alkali-soluble resin (B-2) or a combination thereof.

[0066] The structural units contained in the alkali-soluble resin (B-1) are structural units represented by formula (b-1), structural units represented by formula (b-2), and structural units represented by formula (b-3). In addition, the structural units contained in the alkali-soluble resin (B-2) are structural units represented by formula (b-2), structural units represented by formula (b-4), structural units represented by formula (b-5), and structural units represented by formula (b-6). In the present embodiment, the weight average molecular weight of the alkali-soluble resin (B-1) may be 13500 to 16500, and the weight average molecular weight of the alkali-soluble resin (B-2) may be 11000 to 14000, but are not limited thereto.

[0067]

[0068]

[0069] In the structural units represented by formula (b-1) to formula (b-6), * represents the bonding position;

[0070] In the structural unit represented by formula (b-5), It represents an alkyl group having 1 to 10 carbon atoms.

[0071] The alkali-soluble resin (B) is used in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0072] When the resin composition includes the alkali-soluble resin (B), the resin composition can have good patterning ability, so that the light conversion layer formed therefrom can have good resolution.

[0073] Ethylenically unsaturated monomer (C)

[0074] There is no particular limitation on the ethylenically unsaturated monomer (C), and an appropriate ethylenically unsaturated monomer can be selected according to the requirements. In the present embodiment, the ethylenically unsaturated monomer (C) includes at least one ethylenically unsaturated group. The ethylenically unsaturated monomer (C) may include at least one selected from the group consisting of a monofunctional monomer, a difunctional monomer, and a multifunctional monomer, wherein a multifunctional monomer refers to an ethylenically unsaturated monomer having three or more ethylenically unsaturated groups, preferably a multifunctional monomer.

[0075] For example, the ethylenically unsaturated monomer (C) may include isobornyl methacrylate, 2-phenoxyethyl acrylate, ethoxyethoxyethyl acrylate, tricyclodecane dimethanol diacrylate, 1,6-hexanediol diacrylate, ethylene glycol dimethacrylate, pentaerythritol triacrylate, ethoxylated pentaerythritol tetraacrylate, pentaerythritol hexaacrylate or other suitable monomers, preferably pentaerythritol hexaacrylate. The ethylenically unsaturated monomer (C) may be used alone or in combination of multiple monomers.

[0076] The ethylenically unsaturated monomer (C) is used in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0077] When the resin composition includes the ethylenically unsaturated monomer (C), the resin composition can have good patterning ability, so that the light conversion layer formed therefrom can have good resolution.

[0078] Photoinitiator (D)

[0079] The photoinitiator (D) includes at least one selected from the group consisting of triazine compounds, acetophenone compounds, diphenyl ketone compounds, diimidazole compounds, thioxanthone compounds, quinone compounds, acylphosphine oxides and acyl oxime compounds, preferably at least one selected from the group consisting of acyl oxime compounds and acetophenone compounds. However, the present invention is not limited thereto, and the photoinitiator (D) may also include other suitable photoinitiators.

[0080] The triazine compound may include chemcure-PAG-1 (trade name; manufactured by Hengqiao Industrial Co., Ltd.), chemcure-PAG-2 (trade name; manufactured by Hengqiao Industrial Co., Ltd.) or other suitable triazine compounds. The triazine compound may be used alone or in combination of multiple types.

[0081] The acetophenone compound may include Irgacure 907, 369E (trade name; manufactured by BASF), chemcure-96 (trade name; manufactured by Hengqiao Industrial Co., Ltd.) or other suitable acetophenone compounds. The acetophenone compounds may be used alone or in combination.

[0082] The diphenyl ketone compound may include chemcure-BP, chemcure-64 (trade name; manufactured by Hengqiao Industrial Co., Ltd.) or other suitable diphenyl ketone compounds. The diphenyl ketone compounds may be used alone or in combination of multiple types.

[0083] The diimidazole compound may include Chemcure-BCIM, Chemcure-TCDM (trade name; manufactured by Hengqiao Industrial Co., Ltd.) or other suitable diimidazole compounds. The diimidazole compound may be used alone or in combination of multiple compounds.

[0084] The thioxanthone compound may include Irgacure ITX (trade name; manufactured by BASF) or other suitable thioxanthone compounds. The thioxanthone compounds may be used alone or in combination of two or more.

[0085] The quinone compound may be selected from suitable quinone compounds, and may be used alone or in combination of two or more.

[0086] The acylphosphine oxide may include Ingrasol TPO, Ingrasol 819 (trade name; manufactured by BASF) or other suitable acylphosphine oxides. The acylphosphine oxides may be used alone or in combination of two or more.

[0087] The oxime compound may include OXE-01, OXE-02, OXE-03, OXE-04 (trade names; manufactured by BASF) or other suitable oxime compounds. The oxime compounds may be used alone or in combination.

[0088] The photoinitiator (D) is used in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0089] When the resin composition includes the photoinitiator (D), the resin composition can have good patterning ability, so that the photoconversion layer formed therefrom can have good resolution.

[0090] Solvent (E)

[0091] The solvent (E) is not particularly limited, and an appropriate solvent can be selected according to the requirements. For example, the solvent (E) may include 1,2,3-trichloropropane, 1,3-butanediol, benzyl alcohol, 1,3-butanediol diacetate, 1,4-dioxane, 2-heptanone, 2-methyl-1,3-propanediol, cyclohexanone, 3-methoxybutanol, 3-methoxybutyl acetate, 4-heptanone, m-xylene, m-diethylbenzene, m-dichlorobenzene, N,N-dimethylacetamide, n-butylbenzene, n-propyl acetate, N-methylpyrrolidone, o-Xylene, p-diethylbenzene, o-dichlorobenzene, p-chlorotoluene, isophorone, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, ethylene glycol methyl ether acetate, ethylene glycol ethyl ether acetate, diisobutyl ketone, cyclohexanol acetate, dipropylene glycol dimethyl ether, dipropylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol ethyl ether acetate, propylene glycol monopropyl ether, methyl isobutyl ketone, methylcyclohexanol or other suitable solvents. The solvent (E) may be used alone or in combination of multiple solvents.

[0092] The amount of the solvent (E) used is 65 to 85 parts by weight based on 100 parts by weight of the total amount of the resin composition used.

[0093] When the resin composition includes the solvent (E), the resin composition may have an appropriate viscosity, so that the light conversion layer formed therefrom may have good coating uniformity.

[0094] Phenyl compounds (F)

[0095] The phenyl compound (F) includes at least one of the compound represented by the following formula (F-1) and the compound represented by the following formula (F-2). The phenyl compound (F) may be used alone or in combination of two or more.

[0096]

[0097] In formula (F-1), R 1 is an alkyl group, m is an integer from 0 to 3,

[0098] Z is an alkylene group, *-O-* or a combination thereof, R 2 is hydrogen or an alkyl group,

[0099] When n is 1, Y is hydrogen or alkyl,

[0100] When n is 2, Y is a single bond, an alkylene group, S, or a combination thereof,

[0101] When n is 3, Y is a single bond, a trivalent alkyl group, a trivalent phenyl group, or a combination thereof,

[0102] When n is 4, Y is carbon,

[0103] *Indicates the bonding position.

[0104] In formula (F-1), R 1 Preferably, it is an alkyl group having 1 to 5 carbon atoms, more preferably, it is a methyl group or a tert-butyl group; m is preferably 2 or 3; Z is preferably an alkylene group having 1 to 18 carbon atoms, *-O-* or a combination thereof; R 2 Preferred is hydrogen.

[0105] In formula (F-1), when n is 1, Y is preferably hydrogen or an alkyl group having a carbon number of 1 to 17. For example, when n is 1 and Z is a methylene group (-CH2-), Y is preferably an alkyl group having a carbon number of 7 to 17; or when n is 1 and Y is hydrogen, Z is preferably an alkylene group having a carbon number of 8 to 18.

[0106] In formula (F-1), when n is 2 and Y is an alkylene group, Y is preferably an alkylene group having 4 to 6 carbon atoms, more preferably a hexylene group or a butylene group.

[0107] In formula (F-1), when n is 3 and Y is a trivalent alkyl group, Y is preferably a trivalent alkyl group having 4 to 6 carbon atoms, more preferably a trivalent hexamethylene group or a trivalent butylene group; when n is 3 and Y is a trivalent phenyl group, Y is preferably a trivalent phenyl group substituted with an alkyl group, more preferably a trivalent phenyl group substituted with a methyl group.

[0108] Preferred specific examples of the compound represented by formula (F-1) include compounds represented by the following formulas (f-1) to (f-13). The compounds represented by formulas (f-1) to (f-13) can be purchased from, for example, BASF or ADEKA. The compound represented by formula (F-1) can be used alone or in combination of multiple compounds.

[0109]

[0110]

[0111]

[0112] In formula (F-2), R 3 is an alkyl group, R 4 is hydrogen or phenyl, and p is 0 or 1.

[0113] In formula (F-2), R 3It is preferably an unsubstituted or phenyl-substituted alkyl group, and more preferably an unsubstituted or phenyl-substituted alkyl group having 3 to 8 carbon atoms; R 4 Preferably, it is hydrogen, unsubstituted phenyl, alkyl-substituted phenyl or phenyl substituted by phenylalkyl, more preferably hydrogen, unsubstituted phenyl, butylphenyl or phenyl substituted by phenylpropyl. Preferred specific examples of the compound represented by formula (F-2) include compounds represented by the following formulas (f-14) to (f-16). The compounds represented by formulas (f-14) to (f-16) can be purchased from, for example, Double Bond Chemical. The compound represented by formula (F-2) can be used alone or in combination with multiple compounds.

[0114]

[0115] The phenyl compound (F) is preferably at least one selected from the group consisting of compounds represented by formula (f-1) to formula (f-16).

[0116] Based on 100 parts by weight of the total amount of the resin composition, the amount of the phenyl compound (F) is 0.05 to 5 parts by weight, preferably 0.1 to 4 parts by weight, and more preferably 0.5 to 3 parts by weight.

[0117] When the phenyl compound (F) in the resin composition includes at least one of the compound represented by formula (F-1) and the compound represented by formula (F-2), the hydroxyl group (-OH) and / or the amine group (-NH-) in the compound represented by formula (F-1) and / or the compound represented by formula (F-2) can react with the free radicals generated by the photoinitiator in the resin composition to reduce the free radicals from reacting with other components in the resin composition, thereby obtaining a resin composition with good viscosity stability. At the same time, when the amount of the phenyl compound (F) used falls within the above range, the resin composition can have good viscosity stability and patterning ability, and the light conversion layer formed therefrom has good resolution and pattern stability.

[0118] Scatterer (G)

[0119] The resin composition may further include a scatterer (G). In this embodiment, the scatterer (G) may include at least one selected from the group consisting of titanium dioxide, silicon dioxide, barium titanate, zirconium oxide, zinc oxide, and aluminum oxide. The scatterer (G) may be used alone or in combination.

[0120] The scatterer (G) is used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0121] When the resin composition further includes a scatterer (G), the scatterer (G) can reflect light (e.g., blue light) that is not absorbed by the quantum dots (A) to increase the possibility of light being absorbed by the quantum dots, thereby improving the light absorption rate and light conversion efficiency of the light conversion layer formed by the resin composition.

[0122] Additives (H)

[0123] The resin composition may further include an additive (H). In the present embodiment, the additive (H) may include a leveling agent. There is no particular limitation on the leveling agent, and an appropriate leveling agent may be selected according to demand. For example, the leveling agent may include a siloxane-based surfactant, a silicone-based surfactant, a fluorine-based surfactant or other suitable leveling agents. The leveling agent may be used alone or in combination of multiples. However, the present invention is not limited thereto, and the additive (H) may also include other suitable additives. The additive (H) may be used alone or in combination of multiples.

[0124] The siloxane-based surfactant may include a polysiloxane-based surfactant. For example, the siloxane-based surfactant may include BYK-307, BYK-323, BYK-348 (trade names; manufactured by BYK Chemical Co., Ltd.), KP323, KP324, KP340, KP341 (trade names; manufactured by Shin-Etsu Chemical Co., Ltd.) or other suitable siloxane-based surfactants. The siloxane-based surfactants may be used alone or in combination.

[0125] The silicone-based surfactant may include BYK-333 (trade name; manufactured by BYK-Chemie Co., Ltd.) or other suitable silicone-based surfactants. The silicone-based surfactants may be used alone or in combination of two or more.

[0126] The fluorine-based surfactant may include Megaface F-477, F-554, F-556, F-563, F-575, RS-72-K (trade names; manufactured by DIC Corporation) or other suitable fluorine-based surfactants. The fluorine-based surfactants may be used alone or in combination.

[0127] The additive (H) is used in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of the total amount of the resin composition.

[0128] When the resin composition further includes a leveling agent as an additive (H), the light conversion layer formed by the resin composition can have good coating uniformity.

[0129] <Method for preparing resin composition>

[0130] The preparation method of the resin composition is not particularly limited. For example, quantum dots (A), alkali-soluble resin (B), ethylenically unsaturated monomer (C), photoinitiator (D), solvent (E) and phenyl compound (F) are placed in a stirrer and stirred to uniformly mix into a solution state. If necessary, scatterers (G) and additives (H) may also be added. After uniform mixing, a liquid resin composition can be obtained.

[0131] <Method for producing light conversion layer>

[0132] An exemplary embodiment of the present invention provides a light conversion layer formed using the resin composition.

[0133] The light conversion layer can be formed by coating the above resin composition on a substrate to form a coating film, and pre-baking, exposing, developing, and post-baking the coating film. For example, after the resin composition is coated on the substrate to form a coating film, a pre-exposure baking step (i.e., pre-baking) step is performed at a temperature of 90° C. for 120 seconds. Then, a high-pressure mercury lamp is used at 100 mJ / cm 2 The pre-baked coating film was exposed to light. Then, the exposed coating film was subjected to a developing step for 50 seconds. Next, the developed coating film was washed with distilled water and nitrogen was blown to dry the coating film. Then, post-baking was performed at 150° C. for 20 minutes to form a light conversion layer on the substrate.

[0134] The substrate may be a glass substrate, a plastic substrate material (eg, a polyethersulfone (PES) plate, a polycarbonate (PC) plate, or a polyimide (PI) film), or other light-transmitting substrates, and the type thereof is not particularly limited.

[0135] The coating method is not particularly limited, but spray coating, roll coating, spin coating or the like may be used, and generally, spin coating is widely used. In addition, a coating film is formed, and then in some cases, the residual solvent may be partially removed under reduced pressure.

[0136] The developer is not particularly limited, and an appropriate developer can be selected according to the requirements. For example, the developer can be a potassium hydroxide (KOH) aqueous solution, and its concentration can be 0.038 wt %.

[0137] In this embodiment, the light conversion layer further includes a red pattern layer, a green pattern layer and a scatterer pattern layer. The red pattern layer includes red quantum dots. The green pattern layer includes green quantum dots. The scatterer pattern layer does not contain quantum dots.

[0138] <Light emitting device>

[0139] An exemplary embodiment of the present invention provides a light emitting device including the above-mentioned light conversion layer.

[0140] Figure 1 1 is a schematic diagram of a light emitting device according to an embodiment of the present invention. The light emitting device 10 includes a substrate 120, a light conversion layer 160, and a backlight module 200. In this embodiment, the light emitting device 10 may also include a filter layer 140. The light emitting device 10 may further include a polarizing plate, an alignment film, a liquid crystal (not shown), or other components known to those skilled in the art, which will not be described in detail here.

[0141] In this embodiment, the substrate 120 is a light-transmissive substrate and can be made of glass, organic polymer (such as polyimide (PI), polyethersulfone (PES) or polycarbonate (PC)) or other suitable materials.

[0142] The filter layer 140 is located under the substrate 120. In this embodiment, the filter layer 140 includes, for example, a red filter pattern 142, a green filter pattern 144, and a blue filter pattern 146, wherein each filter pattern preferably has a light shielding pattern 148. The red filter pattern 142, the green filter pattern 144, and the blue filter pattern 146 do not contain quantum dots.

[0143] The light conversion layer 160 is located under the filter layer 140. The filter layer 140 is located between the substrate 120 and the light conversion layer 160. The light conversion layer 160 is a light conversion layer formed using the above-mentioned resin composition. In the present embodiment, the light conversion layer 160 includes a red pattern layer 162, a green pattern layer 164 and a scatterer pattern layer 166, wherein each pattern layer preferably has a bank layer 168 between them. The red pattern layer 162 includes red quantum dots. The green pattern layer 164 includes green quantum dots. The scatterer pattern layer 166 does not contain quantum dots. In the present embodiment, the red pattern layer 162 of the light conversion layer 160 is arranged opposite to the red filter pattern 142 of the filter layer 140, the green pattern layer 164 of the light conversion layer 160 is arranged opposite to the green filter pattern 144 of the filter layer 140, and the scatterer pattern layer 166 of the light conversion layer 160 is arranged opposite to the blue filter pattern 146 of the filter layer 140. For example, the red pattern layer 162 is located under the red filter pattern 142 , the green pattern layer 164 is located under the green filter pattern 144 , and the scatterer pattern layer 166 is located under the blue filter pattern 146 .

[0144] The backlight module 200 is disposed on a side of the substrate 120 where the light conversion layer 160 is disposed. The backlight module 200 irradiates light to the light conversion layer 160. For example, the backlight module 200 is suitable for providing a light source, and the light emitted by the light source sequentially passes through the light conversion layer 160, the filter layer 140 and the substrate 120 to provide a converted light source. In the present embodiment, the type of light source used by the backlight module 200 may include an organic light emitting diode (OLED), a micro-light emitting diode (Micro-LED) or other suitable light sources. In the present embodiment, the backlight module 200 is a light source that emits blue light. After being absorbed by the red quantum dots in the red pattern layer 162 and the green quantum dots in the green pattern layer 164, the blue light emitted by the backlight module 200 can be respectively emitted from the red pattern layer 162 and the green pattern layer 164 after being converted, and then respectively pass through the red filter pattern 142 and the green filter pattern 144 of the filter layer 140 to emit red light and green light; while the blue light emitted by the backlight module 200 will directly pass through the scatterer pattern layer 166 without quantum dots to emit blue light, and then pass through the blue filter pattern 146 of the filter layer 140 to emit blue light. For example, when the light emitted by the light source through the light conversion layer 160 and the filter layer 140 includes visible light (such as red light, green light and blue light), the light emitting device 10 can be applied to a display device or other suitable devices. Thereby, compared with a conventional display device, a display device including the light emitting device 10 having a light conversion layer formed by the above-mentioned resin composition can show better brightness and color purity. For example, when the light emitted by the light source passing through the light conversion layer 160 and the filter layer 140 includes near infrared light (eg, wavelength of about 780 nm to 800 nm), the light emitting device 10 can be applied to an electromagnetic radiation device or other suitable devices.

[0145] Figure 2 is a schematic diagram of a light emitting device according to another embodiment of the present invention. It must be noted here that Figure 2 The implementation examples are used Figure 1 The component numbers and partial contents of the embodiments are the same, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the aforementioned embodiments, and the following embodiments will not be repeated.

[0146] Figure 2 Examples and Figure 1 The main difference of the embodiment is that the light emitting device 20 does not have the filter layer 140.

[0147] Please refer to Figure 2The light emitting device 20 includes a substrate 120, a light conversion layer 160 and a backlight module 200. In this embodiment, the light conversion layer 160 is located on the substrate 120, and there is no light filter layer without quantum dots between the light conversion layer 160 and the substrate 120.

[0148] In the present embodiment, the light emitted by the light source provided by the backlight module 200 passes through the light conversion layer 160 and the substrate 120 in sequence to provide a converted light source. The blue light emitted by the backlight module 200 is absorbed by the red quantum dots in the red pattern layer 162 and the green quantum dots in the green pattern layer 164, and then the converted light is emitted from the red pattern layer 162 and the green pattern layer 164 respectively; and the blue light emitted by the backlight module 200 directly passes through the scatterer pattern layer 166 without quantum dots to emit blue light. For example, when the light emitted by the light source through the light conversion layer 160 includes visible light (such as red light, green light and blue light), the light emitting device 20 can be applied to a display device or other suitable devices. In this way, compared with a conventional display device and / or the above-mentioned display device including the light emitting device 10, the display device including the light emitting device 20 can not only show better brightness and color purity, but also omit the step of manufacturing the filter layer to reduce the manufacturing cost of the display device. For example, when the light emitted by the light source through the light conversion layer 160 includes near-infrared light (eg, with a wavelength of about 780 nanometers to about 800 nanometers), the light emitting device 20 can be applied to an electromagnetic radiation device or other suitable devices.

[0149] Hereinafter, the present invention will be described in detail with reference to examples. The following examples are provided for describing the present invention, and the scope of the present invention includes the scope described in the following claims and its substitutes and modifications, and is not limited to the scope of the examples.

[0150] Examples of resin composition and light conversion layer

[0151] The following describes Examples 1 to 31 and Comparative Examples 1 to 16 of the resin composition and the light conversion layer:

[0152] Example 1

[0153] a. Resin composition

[0154] 8 parts by weight of cadmium selenide green quantum dots (manufactured by Taiwan Naijin Co., Ltd.), 11 parts by weight of alkali-soluble resin (B-1) (manufactured by Miwon Commercial Co., Ltd.), 5.5 parts by weight of pentaerythritol hexaacrylate (DPHA) (manufactured by NIPPON KAYAKU Co., Ltd.), 0.7 parts by weight of Irganox OXE-01, 0.7 parts by weight of Irganox 907, 0.1 parts by weight of Megafax F-554, 1 part by weight of Irganox 1010 (trade name; manufactured by BASF), and 3 parts by weight of titanium dioxide dispersion (manufactured by Sanyo Color Works, LTD.) were added to 70 parts by weight of propylene glycol monomethyl ether acetate (PGMEA), and the mixture was stirred evenly with a stirrer to obtain the resin composition of Example 1.

[0155] b. Light conversion layer

[0156] The resin compositions prepared in the examples were coated on the substrate by spin coating (spin coater model MS-A150, manufactured by MIKASA, with a rotation speed of about 200 rpm). Then, the resin compositions were pre-baked at 90° C. for 120 seconds to form a thin film. Then, a photomask with a linear penetration pattern and a line width / spacing of 1 μm to 100 μm was used, and the distance between the photomask and the film surface was controlled to be about 50 μm, with the g, h, i, i + A high-pressure mercury lamp (model UX-1000SM-ANC01, manufactured by Ushio, Inc.) was used to irradiate the air at 100 mJ / cm 2 The pre-baked coating film is exposed to light to form a semi-finished product. Then, the coating film is developed for 50 seconds at a temperature of 23°C using a potassium hydroxide aqueous solution with a concentration of 0.038% by weight as a developer. Then, the developed coating film is washed with distilled water and nitrogen is blown to dry the coating film. Then, a post-bake is performed at 150°C for 20 minutes to obtain a light conversion layer with a pattern thickness of 6 microns. The obtained light conversion layer is evaluated in the following evaluation methods, and the results are shown in Table 2.

[0157] Examples 2 to 31 and Comparative Examples 1 to 16

[0158] The resin compositions of Examples 2 to 31 and Comparative Examples 1 to 16 were prepared in the same steps as Example 1, and the difference was that the types of components and the amounts used of the resin compositions were changed (as shown in Table 2), wherein the components / compounds corresponding to the numbers in Table 2 were as shown in Table 1. The prepared resin compositions were made into light conversion layers and evaluated in the following evaluation methods, and the results are shown in Table 2.

[0159] [Table 1]

[0160]

[0161]

[0162] [Table 2]

[0163]

[0164] [Table 2] (Continued)

[0165]

[0166] [Table 2] (Continued)

[0167]

[0168] [Table 2] (Continued)

[0169]

[0170] [Table 2] (Continued)

[0171]

[0172] <Evaluation method>

[0173] a. Viscosity stability

[0174] The viscosity (initial viscosity) of the resin composition obtained in each embodiment and comparative example was measured by a viscometer (model TV-22, manufactured by Toki Sangyo Co., Ltd.). After the resin composition was stored at room temperature for three weeks, its viscosity was measured again. The viscosity change rate was calculated according to the following formula:

[0175]

[0176] The evaluation criteria for viscosity stability are as follows:

[0177] ◎: Viscosity change rate ≤ 5%;

[0178] ○: 5%<Viscosity change rate<15%;

[0179] ╳: 15% ≦ viscosity change rate.

[0180] b. Patterning capability

[0181] The prepared light conversion layer was observed under an electron microscope (model SU8000, manufactured by HITACHI) at a magnification of 10,000 times to see whether the straight line pattern with a line width of 10 microns was neat and whether there was any resin composition remaining on the substrate at the edge of the pattern, so as to evaluate the patterning ability.

[0182] The evaluation criteria for patterning capability are as follows:

[0183] ◎: The linearity of the line edge of the linear pattern is high, and no resin composition remains on the substrate at the edge of the pattern;

[0184] ○: The line edge of the linear pattern is not straight, and some resin composition remains on the substrate at the edge of the pattern;

[0185] ╳: The line edge of the linear pattern is not straight, and a large amount of resin composition remains on the substrate at the edge of the pattern, or the pattern is peeled off from the substrate.

[0186] c. Pattern stability

[0187] The resin composition was stored at room temperature for three weeks and then fabricated into a light conversion layer again. The pattern stability was evaluated in the same manner as described above for evaluating patterning capability.

[0188] The evaluation criteria for pattern stability are as follows:

[0189] ◎: The linearity of the line edge of the linear pattern is high, and no resin composition remains on the substrate at the edge of the pattern;

[0190] ○: The line edge of the linear pattern is not straight, and some resin composition remains on the substrate at the edge of the pattern;

[0191] ╳: The line edge of the linear pattern is not straight, and a large amount of resin composition remains on the substrate at the edge of the pattern, or the pattern is peeled off from the substrate.

[0192] <Evaluation Results>

[0193] As shown in Table 2, the resin compositions (Examples 1 to 31) including the phenyl compound (F) having a specific structure and the amount of the phenyl compound (F) being 0.05 to 5 parts by weight based on 100 parts by weight of the total amount of the resin composition have good viscosity stability and patterning ability, and the light conversion layer formed therefrom has good resolution and pattern stability, and can be applied to light emitting devices. In contrast, the resin compositions (Comparative Examples 1 to 16) in which the phenyl compound (F) does not have a specific structure or the amount used is not within the above range and the light conversion layer formed therefrom have poor viscosity stability, patterning ability or pattern stability.

[0194] The resin composition of the phenyl compound (F) with a specific structure (Examples 1 to 31 and Comparative Examples 2, 6, 10, 14) has good viscosity stability. However, when the amount of the phenyl compound (F) with a specific structure in the resin composition is not within the above range, it may affect the reaction between other components in the resin composition (such as the reaction between the free radicals generated by the photoinitiator and the ethylenically unsaturated monomer), resulting in poor patterning ability of the resin composition, and the resolution and pattern stability of the light conversion layer formed therefrom are poor (Comparative Examples 2, 6, 10, 14). It can be seen that when a phenyl compound (F) with a specific structure is used and its amount is within the above range, the resin composition has both good viscosity stability and patterning ability, and the light conversion layer formed therefrom has good resolution and pattern stability, and can be applied to light emitting devices.

[0195] In addition, when the resin composition does not include phenyl compounds, it is equivalent to that the resin composition does not have groups that can effectively react with free radicals, so that the free radicals can react with other components in the resin composition, resulting in poor viscosity stability of the resin composition at room temperature and poor pattern stability of the light conversion layer formed therefrom (Comparison Examples 1, 5, 9, and 13).

[0196] In addition, when the resin composition does not include a phenyl compound having the above-mentioned specific structure, it is equivalent to that the resin composition does not have a group that can effectively react with a free radical, so that the free radical can react with other components in the resin composition, resulting in poor viscosity stability of the resin composition at room temperature, and poor pattern stability of the light conversion layer formed therefrom (Comparative Examples 3, 4, 7, 8, 11, 12, 15-16). In addition, when the resin composition includes a phosphorus or sulfur-containing phenyl compound, the compatibility of the phosphorus or sulfur-containing phenyl compound with the resin composition may be poor, resulting in poor patterning ability of the resin composition, and poor resolution of the light conversion layer formed therefrom (Comparative Examples 3, 4, 7, 8, 11, 12, 15-16).

[0197] In summary, the resin composition of the present invention contains a phenyl compound (F) of a specific structure, and based on the total usage of the resin composition being 100 parts by weight, when the usage of the phenyl compound (F) is 0.05 parts by weight to 5 parts by weight, the resin composition has good viscosity stability and patterning ability, and the light conversion layer formed therefrom has good resolution and pattern stability, and is suitable for light emitting devices and can improve the performance of light emitting devices.

[0198] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resin composition comprising: Quantum dot (A); Alkali soluble resin (B); Ethylenically unsaturated monomer (C); Photoinitiator (D); Solvent (E); Phenyl compounds (F); and Scatterer (G), The phenyl compound (F) includes a compound represented by the following formula (F-2): In formula (F-2), R 3 is an alkyl group, R 4 is hydrogen or phenyl, p is 0 or 1, and Based on 100 parts by weight of the total usage of the resin composition, the usage of the phenyl compound (F) is 0.05 parts by weight to 5 parts by weight, and the usage of the scatterer (G) is 0.1 parts by weight to 10 parts by weight.

2. The resin composition according to claim 1, wherein the quantum dots (A) include at least one selected from the group consisting of green quantum dots and red quantum dots, wherein the emission wavelength of the green quantum dots is in the range of greater than or equal to 500 nanometers to less than 600 nanometers, and the emission wavelength of the red quantum dots is in the range of greater than or equal to 600 nanometers to less than or equal to 800 nanometers.

3. The resin composition according to claim 1, wherein the phenyl compound (F) further comprises at least one selected from the group consisting of the following compounds: 4 . The resin composition according to claim 1 , wherein the scatterer (G) comprises at least one selected from the group consisting of titanium dioxide, silicon dioxide, barium titanate, zirconium oxide, zinc oxide, and aluminum oxide.

5. The resin composition according to claim 1, wherein the amount of the quantum dot (A) is 0.5 to 15 parts by weight, the amount of the alkali-soluble resin (B) is 0.5 to 20 parts by weight, the amount of the ethylenically unsaturated monomer (C) is 0.5 to 20 parts by weight, and the amount of the photoinitiator (D) is 0.01 to 5 parts by weight, based on the total amount of the resin composition used being 100 parts by weight. 6 . The resin composition according to claim 1 , wherein the amount of the solvent (E) used is 65 to 85 parts by weight based on 100 parts by weight of the total amount of the resin composition used. 7 . A light conversion layer, formed from the resin composition according to claim 1 .

8. The light conversion layer according to claim 7, wherein the light conversion layer further comprises: a red pattern layer including red quantum dots; a green pattern layer including green quantum dots; as well as The scatterer pattern layer does not contain quantum dots.

9. The light conversion layer according to claim 8, wherein the emission wavelength of the green quantum dots is in the range of greater than or equal to 500 nanometers to less than 600 nanometers, and the emission wavelength of the red quantum dots is in the range of greater than or equal to 600 nanometers to less than or equal to 800 nanometers. 10 . A light emitting device comprising the light conversion layer according to claim 7 .

11. The light emitting device according to claim 10, wherein the light emitting device further comprises: A substrate, wherein the light conversion layer is located on the substrate; as well as The backlight module is arranged on the side of the substrate where the light conversion layer is arranged.

12. The light emitting device according to claim 11, wherein the light emitting device further comprises a filter layer located between the substrate and the light conversion layer, and the filter layer comprises a red filter pattern, a green filter pattern and a blue filter pattern, and the red filter pattern, the green filter pattern and the blue filter pattern do not contain quantum dots.

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