KR20230157244A - Quantum dot material containing thiol-olefin-isocyanate matrix - Google Patents

Abstract

The present invention relates to a quantum dot material having a thiol-olefin-isocyanate substrate. Specifically, the present invention relates to a quantum dot material through the use of polythiol and a monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1. Including preparing the substrate; Products containing the quantum dot material of the present invention have excellent water and oxygen barrier properties, stable color, and long service life.

Description

Quantum dot material containing thiol-olefin-isocyanate matrix}

The present invention relates to a quantum dot material with a polymer matrix, and specifically to a quantum dot material with a thiol-olefin-isocyanate matrix.

With the development of electronic technology, LED display screens have been widely popularized, and LED display screens have made great progress in terms of brightness, color, etc., but the half width of traditional fluorescent components is generally greater than 80 nm, and saturation is relatively poor. However, in general, it can only cover the left and right 80% of the NTSC (National Television System Committee) standard color gamut, so there is still a relatively large difference from the actual color. To solve the above technical challenges, quantum dot display screens appeared. The core of quantum dot display technology relies on semiconductor nanotransistors with a diameter range of 1-20nm, the half width is generally 30-40nm, the color purity is high, and the semiconductor nanotransistors display different colors when stimulated by light or electricity. By emitting monochromatic light, an image with a fuller color gamut is obtained.

Quantum dot materials have excellent performance, but since the specific surface area of the quantum dot material is much larger than that of the matrix material, it has very high activation and easily reacts with water vapor and oxygen in the air, thereby significantly deteriorating performance. Therefore, the quantum dot material must be packaged using a high-barrier thin film material to satisfy the application demands of the quantum dot material. Currently, the typical structure of quantum mucous membrane products is that the barrier layer performs sandwich packaging with the quantum dot light-emitting layer, that is, the red-green quantum dot coating layer, and the outermost layer is a diffusion layer with a light diffusion function. Although the barrier layer can avoid the quantum dots in the interior regions from being damaged by exposure to oxygen or water, the edge cutting of the product exposes the matrix material to the atmospheric environment. In these edge regions, the protection of quantum dots dispersed in the substrate mainly depends on the blocking properties of the substrate itself. Accordingly, a matrix with better barrier properties is needed to protect quantum dots from degradation, thereby extending service life stability.

The present invention relates to a substrate for use in quantum dot materials, which substrate is capable of preventing ingress of at least one of water and oxygen and provides acceptable color stability over a relatively long period of time.

In one aspect of the invention, a quantum dot composite is provided, the composite comprising quantum dots dispersed in a polymer matrix, the polymer matrix comprising at least one polythiol monomer with a functionality of ≧2 and a functionality of ≧1. It is obtained by preparing by at least one monomer simultaneously containing a polyene group of degree and an isocyanate group of functionality ≧1.

In another aspect of the present invention, a method for producing a quantum dot composite is provided.

In another aspect of the present invention, a quantum dot product containing a quantum dot composite is provided.

The quantum dot composite of the present invention has excellent water and oxygen barrier ability, is stable in color, and can extend the service life of quantum dot products during display applications.

As used in the present invention:

“Alkenyl group” refers to a straight or branched chain unsaturated hydrocarbon.

“(Hetero) hydrocarbon group” includes a hydrocarbon alkyl group and a hydrocarbon aryl group, and a heterohydrocarbon heteroalkyl group and a heterohydrocarbon heteroaryl group, and the heterohydrocarbon heteroalkyl group and heterohydrocarbon heteroaryl group include an ether group or an amino group. It contains one or more catenary (intrachain) heteroatoms such as: Heterohydrocarbon groups may optionally contain one or more catenary (intrachain) functional groups, which catenary functional groups include ester, amide, urea, carbamate and carbonate functional groups. Unless otherwise noted, (hetero)hydrocarbon groups generally contain from 1 to 60 carbon atoms.

The present invention provides a quantum dot composite, the composite comprising quantum dots dispersed in a polymer matrix, the polymer matrix comprising at least one polythiol monomer with a functionality of ≥2, a polyene group with a functionality of ≥1, and ≥ It is obtained by preparing from at least one monomer simultaneously containing an isocyanate group of 1 functionality.

In the reactive monomer of the polymer matrix, one monomer simultaneously contains a polyene group of ≥1 functionality and an isocyanate group of ≥1 functionality, and preferably has the following structure:

or,

or,

or,

or,

For example, m, n, and p may specifically be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10.

More preferably, the monomer simultaneously contains a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1,

or am.

_Among the reactive monomers of the polymer _matrix , the polythiol monomer has the formula _R The thiol group of a polythiol may be a primary thiol or a secondary thiol. Compounds of the above formula may include mixtures of compounds with an average functionality of 2 or greater. R _x includes any (hetero)hydrocarbon group including aliphatic and aromatic polythiols. _R .

Specifically, the polythiol monomer is selected from one or more of the following compounds:

where n is 2 to 10, R ₁ and R ₂ are the same or different and independently selected from -CH ₂ -CH(SH)CH ₃ and -CH ₂ -CH ₂ -SH;

or,

where R ₃ , R ₄ , R ₅ and R ₆ are the same or different and -C(O)-CH ₂ -CH ₂ -SH, -(O)-CH ₂ -CH(SH)CH ₃ , -CH ₂ - independently selected from C(-CH ₂ -OC(O)-CH ₂ -CH ₂ -SH) ₃ , -C(O)-CH ₂ -SH and -C(O)-CH(SH)-CH ₃ ;

where R ₇ , R ₈ and R ₉ are the same or different and -C(O)-CH ₂ -CH ₂ -SH, -C(O)-CH ₂ -CH(SH)CH ₃ , -C(O)- CH ₂ -SH and -C(O)-CH(SH)-CH ₃ are independently selected.

Preferably, the polythiol monomer is ethylene glycol bis (mercaptoacetate), pentaerythritol tetra (3-mercaptopropionate), dipentaerythritol hexa (3-mercaptopropionate), ethylene glycol bis. (3-mercaptopropionate), trimethylolpropane tris (mercaptoacetate), trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetra (mercaptoacetate), pentaerythritol tetra (3-mercaptopropionate), pentaerythritol tetra(3-mercaptobutyrate) and 1,4-bis3-mercaptobutyryloxybutane, tris[2-(3-mercaptopropionyloxy) Ethyl]isocyanurate, trimethylolpropanetris(mercaptoacetate), 2,4-bis(mercaptomethyl)-1,3,5,-triazine-2,4-dithiol, 2,3-di (2-mercaptoethyl)thio)-1-propanethiol, dimercaptodiethyl sulfide and ethoxylated trimethylpropyl-tris(3-mercaptopropionate). More preferably, ethylene glycol bis(mercaptoacetate), ethylene glycol bis(3-mercaptopropionate), trimethylolpropane tris(mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), trimethyl It is selected from rolled propane tris (mercaptoacetate).

Among the reactive monomers of the polymer matrix, the chemical molar ratio of the thiol group of the polythiol monomer, the double bond group of the polyene group and the isocyanate group is (1.2-1.6):(1-1.2):(1-1.2). . With the different curing conditions of thiol-isocyanates and thiol-olefins, step curing is advantageous for controlling the cure heat of high quality quantum dot products, especially relatively thick products where simultaneous curing can generate significant amounts of heat. The different proportions of each type of functional group offer the possibility of controlling the heat of cure.

The quantum dot composite of the present invention is cured by combining a polythiol monomer with a functionality of ≥2, and at least one monomer simultaneously having a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1 in an appropriate ratio. It can be obtained by manufacturing. Generally, under the co-catalysis of the phosphorus-containing compound and the acrylate compound, the polythiol group and polyisocyanate group react first, and then under the co-catalysis of the phosphorus-containing compound and the acrylate compound, the polythiol group and polyene group react with Michael addition reaction. This occurs, and finally, a polymerization reaction of the polyene group occurs under lighting. What should be explained is that the reaction sequence here does not mean that only one reaction occurs in each reaction step, but that the reaction is the main reaction, and when the polythiol group reacts with the polyisocyanate group, a small amount of polythiol group and polyisocyanate group are formed. It is not excluded that reaction of an en group is involved, and that when a polythiol group reacts with a polyene group, a small amount of reaction of a polythiol group with a polyisocyanate group is involved.

The phosphorus-containing compound is,

selected from one or more compounds.

The acrylate compound is selected from one or more of the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, isobutylacrylate, and butylacrylate.

The amount of the acrylate compound used accounts for 0.005-0.05wt% of the total amount of all monomers, the amount of the phosphorus-containing compound used accounts for 0.005-0.05wt% of the total amount of all monomers, and the molar ratio of the acrylate compound and the phosphorus-containing compound is 4:1- It is 1:1.

During the reaction, a nucleophilic addition reaction occurs between the phosphorus-containing compound and the acrylate, resulting in enolated phosphorus.

(where R is independently different), the enolate salt removes the proton of the thiol as a strong base catalyst to form a thiol anion, and then uses the thiol anion as a strong nucleophilic reagent to form at least one of the isocyanate group and the polyene group. react with one

The present invention further provides a method for producing a quantum dot composite, the method comprising:

i) providing a quantum dot material, a polythiol monomer with a functionality of ≧2 and a monomer simultaneously containing polyene groups with a functionality of ≧1 and isocyanate groups with a functionality of ≧1;

ii) Quantum dot material, a polythiol monomer with a functionality of ≥2, a monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1, a phosphorus-containing compound, an acrylate compound and a photoinitiator are mixed, 60 Reacting for a certain period of time below ℃;

iii) raising the temperature and reacting for a certain period of time; and

iv) maintaining the temperature of step iii), adding a photoinitiator to the intermediate obtained in step iii), illuminating for a certain time, and finally raising the temperature again and reacting for a certain time.

In order to control the reaction sequence and implement control of the physical and chemical performance of the reaction product, the reaction in each step must be carried out under suitable conditions. Specifically, the reaction conditions of step ii) are 10-30°C at 10-60°C. minute reaction, and in this step, the thiol group and the isocyanate group are first carried out as the main reaction.

In one implementation method, the reaction conditions of step iii) are to react at 65-100°C for 0.5-2 hours to allow the thiol group and polyene group to perform as the main reaction.

In one implementation method, the illumination conditions in step iv) are illumination under ultraviolet light for 10-20 minutes to cause self-polymerization of the remaining alkenyl groups.

Step iv) also adds a photoinitiator to cause self-polymerization of the alkenyl group.

Preferably, the photoinitiation energy is capable of emitting ultraviolet radiation, i.e. radiation with a wavelength between 180 nanometers and 460 nanometers, wherein the photoinitiation energy is emitted by a mercury arc lamp, carbon arc lamp, low, medium or high pressure. Includes photoinitiated energy sources such as mercury vapor lamps, turbulent plasma arc lamps, xenon flash lamps, ultraviolet light-emitting diodes, and ultraviolet light-emitting lasers.

In one implementation, the initiator is a photoinitiator and can be activated via ultraviolet radiation. Photoinitiators that can be used include (e.g.) benzoin ethers (e.g. benzoin methyl ether and benzoin isopropyl ether), substituted benzoin ethers, substituted acetophenones (e.g. 2,2-dimethoxy-2-phenylacetophenone) ) and substituted α-ketols. Preferably the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propyl-1-ketone (IRGACURE 1173TM, BASF), 2,2-dimethoxy-2-phenylacetophenone (IRGACURE 651TM, BASF), phenylbis. -(2,4,6-trimethylbenzoyl)phosphine oxide (IRGACURE 819, BASF). Other suitable photoinitiators include mercaptobenzothiazole, mercaptobenzoxazole, and hexaarylbimidazole. Generally, the amount of initiator is less than 5% by weight, preferably less than 2% by weight.

In one implementation method, further curing of the system is achieved by raising the temperature again to cause a reaction of the monomers or reactive groups remaining in the system, preferably at 100-130°C and reacting for 0.5-3h.

The present invention further provides a quantum dot product, the quantum dot product comprising:

first blocking layer;

second blocking layer; and

It includes a quantum dot layer between the first blocking layer and the second blocking layer, and the quantum dot layer includes a quantum dot composite according to the present invention.

The first blocking layer and the second blocking layer may be formed of any available material that can protect the quantum dots from exposure to environmental contaminants (eg, oxygen, water, or water vapor). Suitable blocking layers include, but are not limited to, polymer films, glass films, and films of dielectric materials. In some implementations, suitable materials used for the first and second barrier layers include glasses and polymers, such as polyethylene terephthalate (PET), PEN, polyether, or PMMA; oxides such as silicon oxide, titanium oxide or aluminum oxide (eg SiO2, TiO2 or Al2O3); and suitable combinations thereof. Desirably, the blocking layer should be capable of transmitting at least 90% of the radiation, preferably at least 95%, for incident and radiation of the selected wavelengths.

The quantum dot layer includes the quantum dot composite of the present invention, wherein the quantum dots are irradiated by a blue light LED, and then frequency down-convert the blue light of the LED to convert into green light and red light, and control each portion of the red light, green light, and blue light. White light emitted by a display device containing quantum dot products can be realized. The quantum dots are selected from CdSe/ZnS, InP/ZnS and CdS/ZnS. In an exemplary embodiment, the luminescent nanocrystals include an external ligand coating layer, wherein the ligand has an amino group, a carboxyl group, or a mercapto group, specifically, such as mercaptopropionic acid, oleic acid, oleylamine, an amino group-substituted siloxane carrier liquid, It is a long-chain thioether having a carboxyl group at the terminal, preferably H-[CH(CO ₂ C ₁₂ H ₂₅ -n)CH ₂ ] ₃ -S-CH(CO ₂ H)CH ₂ CO ₂ H, H-[CH( CO ₂ C ₁₂ H ₂₅ -n)CH ₂ ] ₅ -S-CH(CO ₂ H)CH ₂ CO ₂ H or the same end as nC ₁₂ H ₂₅ -S-CH(CO ₂ H)CH ₂ CO ₂ H It is a long-chain thioether having a carboxyl group.

The present invention further provides a method for manufacturing a quantum dot product, which method includes coating the quantum dot composite of the present invention on a first blocking layer, installing a second blocking layer on the quantum dot composite layer, and laminating the second blocking layer. , including curing the quantum dot composite.

Intrusion (forming edge intrusion) is defined as loss of quantum dot performance due to ingress of at least one of moisture and oxygen into the matrix. In various embodiments, the quantum dot product is plated for 50 hours at 65°C and 95% relative humidity, has a color shift d(x,y) less than about 0.01 according to the CIE1931(x,y) rule, and changes in quantum yield. is within the 10% range.

In various implementations, the thickness of the quantum dot layer is 25 microns to 500 microns, preferably 40 microns to 250 microns.

General method for manufacturing quantum dot composites and quantum mucous membrane products 1

Polythiol and a monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1 are mixed in the required equivalence ratio, the two monomers total 20 g, and then 1 g of quantum dots CdSe/ZnS and 0.2 g of photoinitiator ( 2,2-dimethoxy-2-phenylacetophenone) and 0.01 g of catalyst were added and thoroughly mixed in a nitrogen box at a speed of 1500 rpm for 3 minutes to prepare quantum dot composites for each example and comparative example described below.

Next, the prepared composite was knife-coated to a thickness of approximately 100 μm between two 50 μm primer PET barriers, followed by reaction at 25°C for 15 min, then reaction at 70°C for 0.5 h, and then illumination under ultraviolet light for 10 min. And finally, react at 110℃ for 0.5h.

General method 2 for manufacturing quantum dot composites and quantum dot membrane products

Polythiol, a monomer simultaneously containing a polyene group of ≥1 functionality and an isocyanate group of ≥1 functionality, and catalyst DBU-Ant-BPh ₄ are mixed in the required equivalence ratio, the two monomers are a total of 20 g, and then 1 g of quantum dots CdSe /ZnS is added and mixed sufficiently for 3 minutes at a speed of 1500 rpm in a nitrogen box to obtain a quantum dot composite.

Next, the prepared composite was knife-coated to a thickness of about 100 μm between two 50 μm primer PET barriers, then illuminated under ultraviolet light for 5 minutes, and finally reacted at 110°C for 0.5 hours.

Methods for measuring quantum yield (QY)

All quantum yields are measured using absolute fluorescence quantum yield spectroscopy.

Methods for studying aging

Aging studies were performed by plating the cut films prepared and obtained in the examples described below for 50 hours at 65°C and 95% relative humidity, followed by quantum yield and color coordinate displacement d(x,y) according to the CIE1931(x,y) rule. Measure and evaluate aging stability.

How to measure edge intrusion

After the cut membrane has aged as described above, the edge penetration of the cured matrix with the two barriers is measured from the cut edge of the matrix membrane via a straight edge under a magnifying glass. During the aging period, if the quantum dots are degraded by at least one of oxygen and moisture and do not emit at least one of green light and red light, the quantum dots at the edge positions will show a black line under blue light.

Monomer compounds used in examples or control examples :

Compound 1: Ethylene glycol bis(mercaptoacetate)

Compound 2: Trimethylolpropane tris (mercaptoacetate)

Compound 3:

Compound 4:

Compound 5:

Compound 6:

Compound 7:

Compound 8:

Compound 9:

Compound 10:

Compound 11:

Compound 12: 1,8-diazabicyclo(5.4.0)unde-7-en-anthra-tetraphenylborate (DBU-Ant-BPh4).

Examples 1-8 and Comparative Examples 1-4

According to the general method 1 for manufacturing the quantum dot composite and quantum dot membrane product, the quantum dot membrane products of Examples 1-8 and Comparative Examples 1-4 were manufactured, and the specific manufacturing conditions are as shown in Table 1.

Examples 9-10 and Comparative Example 5

According to the general method 2 for producing the quantum dot composite and quantum dot membrane products, the quantum dot membrane products of Examples 9-10 and Comparative Example 5 were manufactured, and the specific manufacturing conditions are as shown in Table 1.

Using the above test method, the quantum yield is measured on the prepared samples before and after aging, and the edge intrusion test is measured after aging.

Example or control example monomer SH:NCO:C=C catalyst Example 1 Compounds 1 and 3 1.2:1:1 The molar ratio of methyldiphenylphosphine and propyl acrylate is 1:2. Example 2 Compounds 1 and 4 1.2:1:1 Same as Example 1 Example 3 Compounds 1 and 5 1.2:1:1 Same as Example 1 Example 4 Compounds 2 and 3 1.2:1:1 Same as Example 1 Example 5 Compounds 2 and 4 1.2:1:1 Same as Example 1 Example 6 Compounds 2 and 5 1.2:1:1 Same as Example 1 Example 7 Compounds 1 and 5 1.4:1:1 Same as Example 1 Example 8 Compounds 2 and 5 1.4:1:1 Same as Example 1 Example 9 Compounds 1 and 5 1.2:1:1 DBU-Ant-BPh ₄ Example 10 Compounds 2 and 5 1.2:1:1 DBU-Ant-BPh ₄ Control Example 1 Compounds 1 and 5 2:1:1 Same as Example 1 Control Example 2 Compounds 1, 6, and 7 1.2:1:1 Same as Example 1 Control Example 3 Compounds 1, 8, 9 1.2:1:1 Same as Example 1 Control Example 4 Compounds 1, 10, 11 1.2:1:1 Same as Example 1 Control Example 5 Compounds 1, 8, 9 1.2:1:1 DBU-Ant-BPh ₄

Table 2 below summarizes the QY data when preparing the sample and the QY data and edge intrusion after the same sample of selected examples was aged.

Example or control example before aging after aging Quantum yield (%) Quantum yield (%) Edge intrusion (mm) One 89 85 0.35 2 90 87 0.35 3 92 89 <0.3 4 88 84 0.35 5 89 86 0.3 6 90 86 0.4 7 87 84 0.3 8 91 88 <0.3 9 85 82 0.4 10 87 83 0.4 Control Example 1 80 72 0.45 Control Example 2 78 70 0.5 Control Example 3 77 69 0.5 Control Example 4 79 72 0.45 Control Example 5 74 68 0.6

From the above results, when the substrate of quantum dots is prepared using the thiol of the present invention and a monomer simultaneously containing a polyene group of ≥1 functionality and an isocyanate group of ≥1 functionality, it has excellent water and oxygen barrier ability, and the quantum dots It ensures that the color of the product is stable and shows that the service life of quantum dot products can be extended during display applications. At the same time, the cocatalyst system composed of phosphorus-containing compounds and acrylate compounds can further improve the blocking performance of the substrate.

Although the present invention has been described in combination with specific details and examples thereof, it is obvious that various modifications and combinations can be made to the present invention without departing from the spirit and scope of the present invention. Correspondingly, the specification and drawings are merely illustrative illustrations of the invention as defined by the claims and are intended to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. It is clear that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Hereby, it is intended that the present invention also cover such modifications and variations of the present invention, provided they fall within the scope of the claims and equivalents of the present invention.

Claims (8)

As a quantum dot complex,
The composite includes quantum dots dispersed in a polymer matrix,
The polymer matrix is obtained by preparing by at least one polythiol monomer with a functionality of ≧2 and at least one monomer simultaneously containing polyene groups with a functionality of ≧1 and isocyanate groups with a functionality of ≧1;
Preferably, the chemical molar ratio of the thiol group of the polythiol monomer, the double bond group of the polyene group, and the isocyanate group is (1.2-1.6):(1-1.2):(1-1.2). Quantum dot complex. According to paragraph 1,
The monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1,

or,

or,

or,

or,

A quantum dot complex characterized in that it is selected from one or a plurality of compounds. According to paragraph 1,
The polythiol monomer has the formula below,
_Rx (SH) _y ,
R _x is a hydrocarbon group or a heterohydrocarbon group having a y value, and y ≥ 2. According to any one of claims 1 to 3,
The polythiol monomer is,

n is 2-10, R ₁ and R ₂ are the same or different and independently selected from -CH ₂ -CH(SH)CH ₃ and -CH ₂ -CH ₂ -SH;
or,

R ₃ , R ₄ , R ₅ and R ₆ are the same or different and -C(O)-CH ₂ -CH ₂ -SH, -(O)-CH ₂ -CH(SH)CH ₃ , -CH ₂ -C (-CH ₂ -OC(O)-CH ₂ -CH ₂ -SH) ₃ , independently selected from -C(O)-CH ₂ -SH and -C(O)-CH(SH)-CH ₃ ;
or,

R ₇ , R ₈ and R ₉ are the same or different and -C(O)-CH ₂ -CH ₂ -SH, -C(O)-CH ₂ -CH(SH)CH ₃ , -C(O)-CH ₂ independently selected from -SH and -C(O)-CH(SH)-CH ₃ ;
A quantum dot complex characterized in that it is selected from one or a plurality of compounds. According to any one of claims 1 to 3,
When the polymer substrate is prepared by reacting at least one polythiol monomer with a functionality of ≥2 and at least one monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1, It contains a cocatalyst composed of an acrylate compound and an acrylate compound;
Preferably, the phosphorus-containing compound is,

is selected from one or a plurality of compounds;
Preferably, the acrylate compound is selected from one or more of the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, isobutylacrylate, and butylacrylate;
Preferably, the amount of acrylate compound used accounts for 0.005-0.05wt% of the total amount of all monomers, the amount of phosphorus-containing compound used accounts for 0.005-0.05wt% of the total amount of all monomers, and the molar ratio of the acrylate compound and the phosphorus-containing compound is 4: 1-1:1;
Preferably, the quantum dot is a quantum dot composite, characterized in that selected from CdSe/ZnS, InP/ZnS and CdS/ZnS. A method of producing a quantum dot composite according to any one of claims 1 to 3,
i) providing a quantum dot material, a polythiol monomer with functionality ≥2, at least one monomer simultaneously containing polyene groups with functionality ≥1 and isocyanate groups with functionality ≥1;
ii) Quantum dot material, a polythiol monomer with a functionality of ≥2, a monomer simultaneously containing a polyene group with a functionality of ≥1 and an isocyanate group with a functionality of ≥1, a phosphorus-containing compound, an acrylate compound and a photoinitiator are mixed, 60 Reacting for a certain period of time below ℃;
iii) raising the temperature and reacting for a certain period of time; and
iv) illuminating the intermediate obtained in step iii) for a certain time, and finally raising the temperature again and reacting for a certain time;
Preferably, the reaction conditions of step ii) are reaction at 10-60°C for 10-30 minutes;
Preferably, the reaction conditions of step iii) are reaction at 65-100°C for 0.5-2 hours;
Preferably, the illumination conditions in step iv) are illumination under ultraviolet light for 10-20 minutes;
Preferably, the temperature-elevated reaction conditions in step iv) are a method of producing a quantum dot composite, characterized in that the reaction is performed at 100-130° C. for 0.5-3 hours. With quantum dot products,
first blocking layer;
second blocking layer; and
A quantum dot product comprising a quantum dot layer between the first blocking layer and the second blocking layer, wherein the quantum dot layer includes the quantum dot composite according to any one of claims 1 to 3. A method of forming a quantum dot product according to claim 7, comprising:
A method of forming a quantum dot product comprising the steps of coating the quantum dot composite according to any one of claims 1 to 3 on a first blocking layer, laminating the second blocking layer, and curing.