CN111808601A - Quantum dot composition and display device - Google Patents
Quantum dot composition and display device Download PDFInfo
- Publication number
- CN111808601A CN111808601A CN202010504362.XA CN202010504362A CN111808601A CN 111808601 A CN111808601 A CN 111808601A CN 202010504362 A CN202010504362 A CN 202010504362A CN 111808601 A CN111808601 A CN 111808601A
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- Prior art keywords
- quantum dot
- component
- dot composition
- ether
- acrylate
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 187
- 239000000203 mixture Substances 0.000 title claims abstract description 95
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- -1 tetradecylthiol Chemical compound 0.000 claims description 21
- 230000002209 hydrophobic effect Effects 0.000 claims description 19
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- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 12
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- 150000002433 hydrophilic molecules Chemical class 0.000 claims description 11
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- VVBLNCFGVYUYGU-UHFFFAOYSA-N 4,4'-Bis(dimethylamino)benzophenone Chemical compound C1=CC(N(C)C)=CC=C1C(=O)C1=CC=C(N(C)C)C=C1 VVBLNCFGVYUYGU-UHFFFAOYSA-N 0.000 claims description 6
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- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 claims description 3
- CNJRPYFBORAQAU-UHFFFAOYSA-N 1-ethoxy-2-(2-methoxyethoxy)ethane Chemical compound CCOCCOCCOC CNJRPYFBORAQAU-UHFFFAOYSA-N 0.000 claims description 3
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- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims description 3
- GJKGAPPUXSSCFI-UHFFFAOYSA-N 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone Chemical compound CC(C)(O)C(=O)C1=CC=C(OCCO)C=C1 GJKGAPPUXSSCFI-UHFFFAOYSA-N 0.000 claims description 3
- VETIYACESIPJSO-UHFFFAOYSA-N 2-[2-(2-hydroxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound OCCOCCOCCOC(=O)C=C VETIYACESIPJSO-UHFFFAOYSA-N 0.000 claims description 3
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-UHFFFAOYSA-N 0.000 claims description 3
- UHFFVFAKEGKNAQ-UHFFFAOYSA-N 2-benzyl-2-(dimethylamino)-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=CC=C1 UHFFVFAKEGKNAQ-UHFFFAOYSA-N 0.000 claims description 3
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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Abstract
The application provides a quantum dot composition and a display device, wherein the quantum dot composition comprises quantum dots, a first component and a second component, wherein the boiling point of the first component is less than that of the second component, and the solubility of the quantum dots in the first component is greater than that of the quantum dots in the second component; the quantum dot composition effectively dissolves the quantum dots through the first component, and increases the scattering and transmission of light around the quantum dots through the second component, so that the printing fluency of the quantum dot composition is enhanced, and the stability and the optical performance of a quantum dot film layer formed after the quantum dot composition is cured can be improved.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a quantum dot composition and a display device.
Background
Quantum dots (also called semiconductor nanocrystals) are a new type of semiconductor nanomaterial with a size of 1-10 nm. They have unique Photoluminescent (PL) and Electroluminescent (EL) properties due to quantum size effects and dielectric confinement effects. Compared with the traditional organic fluorescent dye, the quantum dot has excellent optical characteristics of high quantum yield, high photochemical stability, difficult photolysis, wide excitation, narrow emission, high color purity, capability of adjusting the luminescent color by controlling the size of the quantum dot and the like, has wide application prospects in the technical field of display, and becomes a research hotspot as one of the application modes with the highest attention at present.
At present, quantum dot filter coatings are mainly prepared by adopting an ink-jet printing process, namely quantum dots are dissolved in a resin system to prepare quantum dot ink, the quantum dot ink is subjected to steps of printing, curing and the like to prepare the quantum dot filter coatings, and in order to increase the optical performance, light diffusion particles are generally added into the quantum dot ink, but the quantum dot ink cannot be smoothly printed, so that the stability of the formed quantum dot filter coatings is influenced.
Disclosure of Invention
In view of the above technical problems, the present application provides a quantum dot composition comprising a quantum dot, a first component and a second component, wherein the boiling point of the first component is less than the boiling point of the second component, and the solubility of the quantum dot in the first component is greater than the solubility of the quantum dot in the second component.
Further, the solubility of the quantum dots in the first component is 30-60 g, and the solubility of the quantum dots in the second component is less than 10 g.
Further, the boiling point of the first component is less than 250 ℃ and the boiling point of the second component is not less than 300 ℃.
Further, the quantum dot comprises a hydrophobic ligand, the first component comprises a hydrophobic compound, the second component comprises a hydrophilic compound;
preferably, the hydrophobic ligand comprises at least one of stearic acid, oleic acid, oleylamine, octadecylamine, trioctylamine, dodecylamine, tetradecylthiol, octylthiol, hexadecylthiol;
preferably, the hydrophobic compound has a polarity parameter of no greater than 2.5;
preferably, the first component comprises at least one of dodecane, tetradecane, polybiphenyl, hexadecane, octyl methacrylate, decyl methacrylate, isooctyl acrylate.
Further, the second component comprises at least one of polyethylene glycol 350 acrylate, triethylene glycol diacrylate, triethylene glycol acrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and hexapentaerythritol hexaacrylate.
Further, the quantum dot comprises a hydrophilic ligand, the first component comprises a hydrophilic compound, the second component comprises a hydrophobic compound;
preferably, the hydrophilic ligand comprises at least one of polyethylene glycol with sulfydryl, polypropylene glycol with sulfydryl, polybutylene glycol with sulfydryl and polyglycerol with sulfydryl;
preferably, the hydrophilic compound has a polarity parameter of not less than 6;
preferably, the first component comprises at least one of ethylene glycol butyl ether, dimethyl imidazolidinone, ethylene glycol butyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol butyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ethyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol methyl ethyl ether, tetrahydrofuran acrylate.
Further, the second component comprises at least one of lauryl methacrylate, lauryl acrylate, long-chain alkane acrylate, aromatic hydrocarbon acrylate, petroleum resin, polymethyl methacrylate, acrylic resin and fluorine resin.
Further, the adhesive also comprises a cross-linking agent, wherein the cross-linking agent comprises at least one of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, hexapentaerythritol hexaacrylate, divinylbenzene and N, N-methylenebisacrylamide;
preferably, the quantum dot composition further comprises a photoinitiator, wherein the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, benzoin ethyl ether, benzoin methyl ether, benzoin ethyl ether, benzoin butyl, At least one of benzophenone, 2, 4-dihydroxybenzophenone, Michler's ketone, and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus;
preferably, the quantum dot composition further comprises a leveling agent, and the leveling agent comprises at least one of polyether siloxane copolymers, polyacrylate and organic silicon acrylate.
Further, the content of the first component is 1-40 wt%, the content of the second component is 1-40 wt%, and the content of the quantum dot is 1-50 wt%, based on the percentage of the components in the total weight of the quantum dot composition;
preferably, the viscosity of the quantum dot composition is 2-40 cp.
The application also provides a display device, which comprises a color filter film, wherein the color filter film is prepared by the quantum dot composition in an ink-jet printing mode;
preferably, the light incident side of the color filter film is an arc-shaped structure.
Has the advantages that:
(1) the quantum dot composition comprises quantum dots, a first component and a second component, wherein the boiling point of the first component is smaller than that of the second component, the solubility of the quantum dots in the first component is larger than that of the quantum dots in the second component, the quantum dots are effectively dissolved by the first component, and the scattering and transmission of light around the quantum dots are increased by the second component, so that the printing fluency of the quantum dot composition is enhanced, and the stability and the optical performance of a quantum dot film layer formed after the quantum dot composition is cured are improved.
(2) The display device provided by the application adopts the quantum dot composition to prepare the color filter film, so that the light emitting performance is excellent.
Detailed Description
The technical solutions in the examples of the present application will be described in detail below with reference to the embodiments of the present application. It should be noted that the described embodiments are only some embodiments of the present application, and not all embodiments.
As described in the background art, the current quantum dot ink contains light diffusion particles, which causes unsmooth printing, affects the stability of a quantum dot light filter, and in order to improve the printing smoothness of the quantum dot ink and obtain good optical performance, the present application provides a quantum dot composition, which comprises a quantum dot, a first component and a second component, wherein the boiling point of the first component is less than that of the second component, and the solubility of the quantum dot in the first component is greater than that of the quantum dot in the second component. The term "solubility" as used herein refers to the mass of a solute dissolved when a certain material as the solute is saturated in 100g of a solvent at room temperature (20 to 30 ℃). "boiling point" and "melting point" in this application are measured at 1 standard atmosphere. The first component of the quantum dot composition effectively dissolves the quantum dots, and the second component effectively increases the scattering and transmission of light around the quantum dots, so that the printing fluency of the quantum dot composition is enhanced, and the stability and the optical performance of a quantum dot film layer formed after the quantum dot composition is cured can be improved.
In one embodiment of the present application, the solubility of the quantum dot in the first component is 30-60 g, the solubility of the quantum dot in the second component is less than 10g, the quantum dot is easily soluble in the volatile first component and insoluble in the nonvolatile second component, the first component effectively adjusts the viscosity and surface tension of the quantum dot composition, and the second component effectively adjusts the thickness of a quantum dot film formed by the quantum dot composition.
In another specific embodiment of the present application, the boiling point of the first component is less than 250 ℃, the boiling point of the second component is not less than 300 ℃, in the preparation process of the quantum dot film layer, the first component of the quantum dot composition volatilizes along with the process, the second component forms a main component of the quantum dot film layer, the solubility of the quantum dot in the second component is low, the quantum dot will not migrate to the edge of the quantum dot film layer in the volatilization process of the first component, and the second component plays a role similar to a light diffuser, and the quantum dot will be uniformly dispersed in the quantum dot film layer, so that the light extraction performance and the light conversion efficiency of the quantum dot film layer prepared from the quantum dot composition are effectively increased.
In another embodiment herein, the first component comprises at least one of an organic solvent, a monomer; the second component comprises at least one of resin and monomer. The organic solvent and the monomer can ensure that the quantum dots have better solubility in the quantum dot composition and are volatilized and removed in the film forming process; the resin and the monomer can form the main material of the quantum dot film layer, and effectively play a role in light diffusion.
In another embodiment of the present application, the quantum dots in the quantum dot composition comprise hydrophobic ligands, the first component comprises a hydrophobic compound, the second component comprises a hydrophilic compound; the hydrophobic ligand increases the solubility of the quantum dot with the first component comprising the hydrophobic compound.
In a preferred embodiment herein, the hydrophobic ligand comprises at least one of stearic acid, oleic acid, oleylamine, octadecylamine, trioctylamine, dodecylamine, tetradecylthiol, octylthiol, hexadecylthiol.
In a preferred embodiment, the hydrophobic compound has a polarity parameter of not more than 2.5, which is more favorable for the dissolution of the quantum dots containing the hydrophobic ligand in the hydrophobic compound, and the polarity parameter of the compound can be referred to the solvent handbook in the prior art.
In another embodiment of the present application, the first component of the quantum dot composition comprises at least one of dodecane, tetradecane, polybiphenyl, hexadecane, octyl methacrylate, decyl methacrylate, isooctyl acrylate, which is effective as the first component to increase the solubility of the quantum dot in the quantum dot composition.
In another embodiment of the present application, the second component of the quantum dot composition includes at least one of polyethylene glycol 350 acrylate, triethylene glycol diacrylate, triethylene glycol acrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and hexapentaerythritol hexaacrylate, wherein 350 of the polyethylene glycol 350 acrylate refers to the molecular weight of polyethylene glycol, and such a substance as the second component of the quantum dot composition can effectively improve the light scattering property of the quantum dot composition after film formation.
In yet another embodiment of the present application, the quantum dots in the quantum dot composition comprise a hydrophilic ligand, the first component comprises a hydrophilic compound, the second component comprises a hydrophobic compound; the hydrophilic ligand increases the compatibility of the quantum dot with the first component containing the hydrophilic compound.
In a preferred embodiment of the present application, the hydrophilic ligand comprises at least one of thiol-group-containing polyethylene glycol, thiol-group-containing polypropylene glycol, thiol-group-containing polybutylene glycol, and thiol-group-containing polyglycerol.
In a preferred embodiment, the hydrophilic compound has a polarity parameter of not less than 6, which is more favorable for the dissolution of the quantum dot containing the hydrophilic ligand in the hydrophilic compound.
It is to be understood that the kind of the quantum dot in the embodiment of the present invention is not particularly limited as long as the quantum dot can be used for subsequent coordination bonding, has a certain light emitting performance, and can obtain the quantum dot described in the embodiment of the present invention, and those skilled in the art can select the quantum dot according to the actual requirements of the inkjet printing process or the manufactured quantum dot light emitting device, for example, the quantum dot may be selected from cadmium sulfide (CdS), cadmium selenide (CdSe), cadmium telluride (CdTe), zinc sulfide (ZnS), lead sulfide (PbS), and the like,ZnSe, ZnTe, HgS, GaInN, GaAs, InP, InAs, perovskite, e.g. PVK, CsPbBrx) And the mixed type of each element constituting the quantum dot may be a homogeneous mixed type, a gradient mixed type, a core-shell type, or a combination type.
In yet another embodiment of the present application, the first component of the quantum dot composition includes at least one of ethylene glycol butyl ether, dimethyl imidazolidinone, ethylene glycol butyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol butyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ethyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol methyl ethyl ether, and tetrahydrofuran acrylate, which is effective as the first component to increase the solubility of the quantum dots in the quantum dot composition.
In another embodiment of the present application, the second component of the quantum dot composition comprises at least one of long-chain alkane acrylate, aromatic acrylate, petroleum resin, polymethyl methacrylate, acrylic resin and fluorine resin of C10-C20, and the second component of the quantum dot composition is used as the second component of the quantum dot composition, which is effective in improving light scattering property of the quantum dot composition after film formation. The long-chain alkane acrylate of C10-C20 refers to a long-chain alkane acrylate having 10-20 carbon atoms, and may be, for example, dodecyl acrylate, dodecyl methacrylate, dodecyl acrylate, hexadecyl acrylate or eicosyl methacrylate.
In yet another embodiment of the present application, the quantum dot composition further comprises a cross-linking agent comprising at least one of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, hexapentaerythritol hexaacrylate, divinylbenzene, N-methylenebisacrylamide; the photocuring effect of the quantum dot composition depends on the cross-linking agent with double photosensitive functional groups to participate in reaction, the cross-linking agent generates double free radicals after exposure, and the double free radicals react with the poly hydrocarbon resin to form bridge bonds between polymer molecular chains and are connected into insoluble substances with three-dimensional structures.
In a preferred embodiment, the quantum dot composition of the present application further comprises a photoinitiator comprising 2-hydroxy-2-methyl-1-phenylpropanone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether, methyl ethyl ether, ethyl acetate, benzoin butyl ether, benzophenone, 2, 4-dihydroxybenzophenone, Michler's ketone, diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus to give excellent photoinitiation.
In a preferred embodiment, the quantum dot composition further comprises a leveling agent, wherein the leveling agent comprises at least one of polyether siloxane copolymers, polyacrylate and organic silicon acrylate; the surface tension of the quantum dot composition can be effectively reduced, the leveling property and uniformity of the quantum dot composition are improved, and the quantum dot composition is promoted to form a flat, smooth and uniform quantum dot film layer in the drying film-forming process.
In another embodiment of the present application, the content of the first component is 1 to 40 wt%, the content of the second component is 1 to 40 wt%, and the content of the quantum dot is 1 to 50 wt%, based on the percentage of each component to the total weight of the quantum dot composition; under the reasonable proportion of the three substances, the optical performance of the quantum dot composition is further improved, and the printing fluency is further enhanced.
In a preferred embodiment, the viscosity of the quantum dot composition is 2 to 40cp, so that the activity of the quantum dot composition is enhanced, the adhesion of the cured film layer to the substrate is increased, and the film surface hardness and the solvent resistance are improved.
The application also provides a display device which comprises a color filter film, wherein the color filter film is prepared by adopting the quantum dot composition. The display device of the present application includes, but is not limited to, any product or component having a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a vehicle-mounted display, an AR display, a VR display, etc., and is particularly suitable for a color display device.
The display device may include a structure known to those skilled in the art of the present invention, in addition to the color filter film, that is, a display device including a color filter film that can be prepared using the quantum dot composition of the present invention.
In a preferred embodiment, in the display device of the present application, the light incident side of the color filter is an arc-shaped structure, which further increases the scattering of incident light and improves the optical performance of the display device.
Quantum dot compositions, display devices, according to some exemplary embodiments of the present application are described in more detail below; however, the exemplary embodiments of the present application are not limited thereto.
Example 1
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 30 wt% of a first component (wherein the weight of diethylene glycol butyl ether is 10 wt%, the weight of tetrahydrofuran acrylate is 20 wt%), 40.5 wt% of a second component (wherein the weight of fluorine resin is 10.5 wt%, the weight of lauryl acrylate is 30 wt%), 5 wt% of a cross-linking agent (dipentaerythritol pentaacrylate), 1 wt% of a photoinitiator (2,4, 6-trimethylbenzoyl-diphenylphosphine), and 0.5 wt% of a leveling agent (polydimethylsiloxane), ultrasonically mixing uniformly, and stirring for 30min in a dark place under centrifugation to obtain a glue solution;
step two, adding 23 wt% of quantum dots (R _ CdSe, wherein the ligand on the surface of the quantum dots is oleic acid) into the glue solution in the quantum dot composition, and centrifugally and uniformly stirring to obtain the quantum dot composition with the viscosity of 8.1 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the ink-jet printing smoothness and stability are good, and performing 1500mJ/cm by adopting 365nm ultraviolet light2The color filter film with the film thickness of 13 mu m is obtained after UV curing and drying, no scratch is caused after the color filter film is scratched by a probe of a step profiler, and the color filter film cannot be washed away by ethanol.
Example 2
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 20 wt% of a first component (octyl acrylate), 43.5 wt% of a second component (13.5 wt% of fluorine resin, 30 wt% of lauryl methacrylate), 5 wt% of a cross-linking agent (dipentaerythritol pentaacrylate), 1 wt% of a photoinitiator (2,4, 6-trimethylbenzoyl phenyl ethyl phosphonate), and 0.5 wt% of a leveling agent (polydimethylsiloxane), ultrasonically mixing uniformly, and stirring for 30min under centrifugation in a dark place to obtain a glue solution;
step two, adding 30 wt% of quantum dots (G _ CdSe, wherein the surface ligand of the quantum dots is dodecyl mercaptan) into the glue solution in the quantum dot composition, and centrifugally stirring uniformly to obtain the quantum dot composition with the viscosity of 7.2 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the ink-jet printing smoothness and stability are good, and performing 1500mJ/cm by adopting 365nm ultraviolet light2The color filter film with the film thickness of 16 mu m is obtained after UV curing and drying, no scratch is caused after the color filter film is scratched by a probe of a step profiler, and the color filter film cannot be washed away by ethanol.
Example 3
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 25 wt% of a first component (diethylene glycol methyl ether), 45 wt% of a second component (SN 2303 acrylic resin 5 wt%, tripropylene glycol diacrylate 40 wt%), 5 wt% of a cross-linking agent (trimethylolpropane triacrylate), 2 wt% of a photoinitiator (benzoin methyl ether), and 1 wt% of a leveling agent (model number: Flow425), ultrasonically mixing uniformly, and stirring for 30min under centrifugation in the dark to obtain a glue solution;
step two, adding 22 wt% of quantum dots (R _ InP, wherein the surface ligand of the quantum dots is oleylamine) into the glue solution in the quantum dot composition, and centrifugally and uniformly stirring to obtain the quantum dot composition with the viscosity of 9.4 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the ink-jet printing smoothness and stability are good, and performing 1500mJ/cm by adopting 365nm ultraviolet light2The color filter film with the film thickness of 10 mu m is obtained after UV curing and drying, no scratch is caused after the color filter film is scratched by a probe of a step profiler, and the color filter film cannot be washed away by ethanol.
Example 4
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 23 wt% of a first component (tetrahydrofuran acrylate), 35 wt% of a second component (SN 2303 acrylic resin 5 wt%, isobornyl methacrylate 30 wt%), 5 wt% of a crosslinking agent (trimethylolpropane triacrylate), 1 wt% of a photoinitiator (2,4, 6-trimethylbenzoyl-phenyl phosphine oxide), and 0.5 wt% of a leveling agent (model number: Flow425), ultrasonically mixing uniformly, and stirring for 30min under centrifugation in the dark to obtain a glue solution;
step two, adding 35 wt% of quantum dots (G _ InP, wherein the ligand on the surface of the quantum dots is polyethylene glycol) into the glue solution in the quantum dot composition, and centrifugally stirring uniformly to obtain the quantum dot composition with the viscosity of 11.4 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the ink-jet printing smoothness and stability are good, and performing 1500mJ/cm by adopting 365nm ultraviolet light2The color filter film with the film thickness of 11.9 mu m is obtained after UV curing and drying, the color filter film is scratched by a step profiler probe without scratches, and the color filter film is not washed away by ethanol.
Example 5
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 25 wt% of a first component (octyl acrylate), 35 wt% of a second component (15 wt% of fluorine resin, 20 wt% of lauryl methacrylate), 3 wt% of a cross-linking agent (dipentaerythritol pentaacrylate), 1 wt% of a photoinitiator (ethyl 2,4, 6-trimethylbenzoylphenylphosphonate), and 0.5 wt% of a leveling agent (type Glide Rad 2100), uniformly mixing by ultrasonic, and stirring for 30min in a centrifugal manner in a dark place to obtain a glue solution;
step two, adding 35 wt% of quantum dots (G _ PVK, wherein the ligand on the surface of the quantum dots is oleic acid) into the glue solution in the quantum dot composition, and centrifuging and uniformly stirring to obtain the quantum dot composition with the viscosity of 8.9 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the ink-jet printing smoothness and stability are good, and performing 1500mJ/cm by adopting 365nm ultraviolet light2The color filter film with the film thickness of 15.4 mu m is obtained after UV curing and drying, no scratch is caused after the color filter film is scratched by a probe of a step profiler, and the color filter film cannot be washed away by ethanol.
Comparative example 1
Step one, mixing the following substances in percentage by weight in the quantum dot composition: 30 wt% of a first component (octyl acrylate), 35 wt% of a second component (SN 2303 acrylic resin 5 wt%, tripropylene glycol diacrylate 30 wt%), 4 wt% of a cross-linking agent (dipentaerythritol pentaacrylate), 0.5 wt% of a photoinitiator (2,4, 6-trimethylbenzoyl phenyl ethyl phosphonate), 0.5 wt% of a leveling agent (dimethyl silicone oil), ultrasonically mixing uniformly, and stirring for 30min under centrifugation in the dark to obtain a glue solution;
step two, adding 30 wt% of quantum dots (G _ CdSe, wherein the surface ligand of the quantum dots is polyethylene glycol) into the glue solution in the quantum dot composition, and centrifugally and uniformly stirring to obtain the quantum dot composition with the viscosity of 8.6 cp;
step three, preparing a glass substrate provided with a plurality of pixel isolation structures, performing ink-jet printing on the quantum dot composition, wherein the smoothness and stability of the ink-jet printing are general, and performing 1500mJ/cm by adopting 365nm ultraviolet light2UV curing and drying to obtain a color filter film with a thickness of 8.7 μm, and probing with a step profilerAiming at the situation that the color filter film has no scratch after being scratched, the color filter film cannot be washed away by adopting ethanol for washing.
The color filters of examples 1 to 5 and comparative example 1 were irradiated with a blue backlight, and the luminance of the red light or green light emitted from the color filters, the external quantum efficiency, and the light conversion rate were measured by an optical color analyzer, respectively, and the results are shown in table 1.
TABLE 1 optical Property results for examples 1 to 5, comparative example 1
As can be seen from table 1, the color filter films prepared from the quantum dot compositions of examples 1 to 5 of the present application can obtain better brightness, external quantum efficiency and light conversion rate compared to comparative example 1, and it is known that the quantum dot compositions of the present application have good solubility of the quantum dots, good ink-jet printing fluency and stability of the quantum dot compositions, and the prepared color filter films have strong adhesion, good solvent resistance and excellent luminescence property.
Although the present disclosure has been described and illustrated in greater detail by the inventors, it should be understood that modifications and/or alterations to the above-described embodiments, or equivalent substitutions, will be apparent to those skilled in the art without departing from the spirit of the disclosure, and that no limitations to the present disclosure are intended or should be inferred therefrom.
Claims (10)
1. A quantum dot composition comprising a quantum dot, a first component, and a second component, wherein the boiling point of the first component is less than the boiling point of the second component, and the solubility of the quantum dot in the first component is greater than the solubility of the quantum dot in the second component.
2. The quantum dot composition of claim 1, wherein the solubility of the quantum dots in the first component is 30-60 g, and the solubility of the quantum dots in the second component is less than 10 g.
3. The quantum dot composition of claim 1, wherein the boiling point of the first component is less than 250 ℃ and the boiling point of the second component is not less than 300 ℃.
4. The quantum dot composition of claim 1, wherein the quantum dot comprises a hydrophobic ligand, the first component comprises a hydrophobic compound, and the second component comprises a hydrophilic compound;
preferably, the hydrophobic ligand comprises at least one of stearic acid, oleic acid, oleylamine, octadecylamine, trioctylamine, dodecylamine, tetradecylthiol, octylthiol, hexadecylthiol;
preferably, the hydrophobic compound has a polarity parameter of no greater than 2.5;
preferably, the first component comprises at least one of dodecane, tetradecane, polybiphenyl, hexadecane, octyl methacrylate, decyl methacrylate, isooctyl acrylate.
5. The quantum dot composition of claim 4, wherein the second component comprises at least one of polyethylene glycol 350 acrylate, triethylene glycol diacrylate, triethylene glycol acrylate, diethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and hexapentaerythritol hexaacrylate.
6. The quantum dot composition of claim 1, wherein the quantum dot comprises a hydrophilic ligand, the first component comprises a hydrophilic compound, and the second component comprises a hydrophobic compound;
preferably, the hydrophilic ligand comprises at least one of polyethylene glycol with sulfydryl, polypropylene glycol with sulfydryl, polybutylene glycol with sulfydryl and polyglycerol with sulfydryl;
preferably, the hydrophilic compound has a polarity parameter of not less than 6;
preferably, the first component comprises at least one of ethylene glycol butyl ether, dimethyl imidazolidinone, ethylene glycol butyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol butyl ether, diethylene glycol ethyl ether, diethylene glycol methyl ethyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol methyl ethyl ether, tetrahydrofuran acrylate.
7. The quantum dot composition of claim 6, wherein the second component comprises at least one of long-chain alkane acrylate of C10-C20, aromatic hydrocarbon acrylate, petroleum resin, polymethyl methacrylate, acrylic resin, and fluorine resin.
8. The quantum dot composition of claim 1, further comprising a cross-linking agent comprising at least one of trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, hexapentaerythritol hexaacrylate, divinylbenzene, N-methylenebisacrylamide;
preferably, the quantum dot composition further comprises a photoinitiator, wherein the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, benzoin dimethyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, benzoin ethyl ether, benzoin methyl ether, benzoin ethyl ether, benzoin butyl, At least one of benzophenone, 2, 4-dihydroxybenzophenone, Michler's ketone, and diphenyl- (2,4, 6-trimethylbenzoyl) oxyphosphorus;
preferably, the quantum dot composition further comprises a leveling agent, and the leveling agent comprises at least one of polyether siloxane copolymers, polyacrylate and organic silicon acrylate.
9. The quantum dot composition of any one of claims 1-8, wherein the first component is present in an amount of 1 to 40 wt%, the second component is present in an amount of 1 to 40 wt%, and the quantum dot is present in an amount of 1 to 50 wt%, based on the total weight of the quantum dot composition;
preferably, the viscosity of the quantum dot composition is 2-40 cp.
10. A display device comprising a color filter, wherein the color filter is prepared by the quantum dot composition according to any one of claims 1 to 9 by inkjet printing;
preferably, the light incident side of the color filter film is an arc-shaped structure.
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