Circularly polarized light-emitting confinement assembly material, preparation method thereof and light-emitting device

Abstract

The invention discloses a circularly polarized light-emitting confinement assembly material which is obtained by polymerizing a precursor, the precursor is prepared from the following components in parts by mass: 0.1 to 15 parts of liquid crystal monomer containing acryloyloxy or ester group, 1 to 10 parts of biphenyl nitrile solvent, 0.02 to 1.2 parts of chiral compound, 0.005 to 0.5 part of luminescent material and 0.005 to 0.3 part of photoinitiator. The circularly polarized light-emitting confinement assembly material has excellent light-emitting performance, the light-emitting asymmetry factor can reach up to 0.1-1.8 and is far better than that of a traditional material, stable circularly polarized light can be emitted, the rotation direction and the light-emitting color can be adjusted in a coordinated mode, and the requirements for material performance in the fields of high-performance photoelectric devices, information safety, biomedical treatment and the like are greatly met; and the size of the material is 10-300 microns, so that further processing and integration are facilitated, and the machinability of the material and the integration capability of the device are improved.

Description

Technical Field

[0001] The present application relates to the technical field of circularly polarized luminescence materials, and particularly to a circularly polarized luminescence confinement assembly material, a preparation method thereof, and a light-emitting device. Background Art

[0002] Circularly polarized luminescence reflects the excited state structure information of chiral substances and has broad application prospects in the fields of future displays, asymmetric catalysis, information security, biomedicine, optoelectronic devices, etc. At present, circularly polarized luminescence materials are mainly prepared by top-down and bottom-up methods. However, the top-down methods mainly involve micro-nano processing of existing materials, such as lithography, etching, etc., to manufacture devices with chiral structures. These methods are usually complex to fabricate, costly, and difficult to achieve complex three-dimensional chiral structures at the sub-wavelength scale. The bottom-up methods mainly involve constructing chiral structures at the molecular or nano scale, such as through molecular assembly, self-assembly, etc. However, there are problems such as low luminescence asymmetry factors (about 10 -4 -10 -2 , far lower than the theoretical maximum value of 2), and it is difficult to precisely control the self-assembly process, which is not conducive to practical applications.

[0003] In recent years, a series of circularly polarized luminescence materials with relatively high luminescence asymmetry factors (up to 10 -1 ) have been obtained by co-assembling macroscopic helical structures (such as chiral liquid crystals) with luminescent components, and their performance can meet the basic application requirements. However, liquid small molecule liquid crystals usually remain in a flowing state at room temperature and need to be integrated and encapsulated during practical applications, and their helical structures are also easily changed under external stimuli; chiral liquid crystal polymer films are usually presented in the form of films or physical stacks, which is not conducive to their processability and device integration. Moreover, the synthesis of related materials highly depends on complex manual synthesis, which is not conducive to large-scale preparation and application.

[0004] Therefore, developing a circularly polarized luminescence material with high luminescence asymmetry factors, high processing characteristics, and high stability is an urgent problem to be solved in the field at present. Summary of the Invention

[0005] In view of this, the present application provides a circularly polarized luminescence confinement assembly material, which has excellent luminescence performance, the luminescence asymmetry factor can reach 0.1 - 1.8, far exceeding the performance of traditional materials, and can emit stable circularly polarized light, and the helicity and luminescence color can be coordinately adjusted, greatly meeting the requirements for material performance in the fields of high-performance optoelectronic devices, information security, biomedicine, etc.

[0006] The present application provides a circularly polarized luminescent confined assembly material, which is obtained by polymerization of a precursor; the precursor includes, by mass: 0.1 to 15 parts of a liquid crystal monomer containing an acryloxy group or an ester group, 1 to 10 parts of a biphenyl nitrile solvent, 0.02 to 1.2 parts of a chiral compound, 0.005 to 0.5 parts of a luminescent material, and 0.005 to 0.3 parts of a photoinitiator.

[0007] The present application uses liquid crystal monomers containing acryloxy or ester groups, biphenyl nitrile solvents, chiral compounds, luminescent materials and photoinitiators as raw materials to synthesize circularly polarized luminescent confined assembly materials, which have excellent luminescent properties and luminescent asymmetric factors. In some specific implementations, the particle size of the circularly polarized luminescent confined assembly material is 10 microns to 300 microns, which can be 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 80 microns, 100 microns, 120 microns, 140 microns, 160 microns, 180 microns, 200 microns, 220 microns, 240 microns, 260 microns, 280 microns, 300 microns, preferably 60 microns to 120 microns, which is conducive to later processing and integration.

[0008] The circularly polarized light-emitting confined assembly material includes a liquid crystal monomer containing an acryloxy group or an ester group. In some specific implementations, the liquid crystal monomer containing an acryloxy group or an ester group includes, but is not limited to, one or more of 1,4-bis-[4-(3-acryloxypropoxy)benzoyloxy]-2-methylbenzene, 2-methyl-1,4-phenylenebis(4-((6-(acryloxy)hexyl)oxy)benzoate), 2,4-dimethoxybenzoic acid-4-[(4-nitrophenoxy)carbonyl]phenol ester or 4-[[6-[(1-oxo-2-propenyl)oxy]hexyl]oxy]benzoic acid-4-methoxyphenyl ester, and the present application has no special requirements for the selection of acryloxy monomers. The liquid crystal monomer terminal containing an acryloxy group or an ester group is prone to polymerization reaction to form a polymer skeleton with a network structure.

[0009] The mass fraction of the liquid crystal monomer containing an acryloxy group or an ester group is 0.1 to 15 parts, and can be 0.1, 0.5, 1, 1.2, 2, 5, 8, 10, 12, 13, 14, 14.5, 15 parts, and preferably 0.5 to 3.5 parts.

[0010] The circularly polarized luminescence confinement assembly material includes benzonitrile solvents. In some specific implementation manners, the benzonitrile solvents include, but are not limited to, one or more of 4-cyano-4'-pentylbiphenyl, 4-heptyl-4'-cyanobiphenyl, 4-n-octylphenyl-4'-phenoxybiphenyl, 4,4'-dioxybiphenyl, 4-n-octylphenyl-4'-oxybiphenyl, 4'-n-pentyloxy-4-cyanobiphenyl, 4'-n-octyloxy-4-cyanobiphenyl, or 4'-n-pentyl-4-cyanotriphenyl. There are no special requirements for the selection of benzonitrile solvents in this application. The benzonitrile solvents are also liquid crystal molecules, but belong to non-reactive molecules and do not participate in polymerization, and are filled into the polymer backbone.

[0011] The mass fraction of the benzonitrile solvent is from 1 part to 10 parts, and can be 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, and is preferably from 1.2 parts to 2.8 parts.

[0012] The circularly polarized luminescence confinement assembly material includes chiral compounds. In some specific implementation manners, the chiral compounds include left-handed chiral compounds or right-handed chiral compounds; the left-handed chiral compounds include, but are not limited to, one or more of S1011, S2011, S5011, or S811. There are no special requirements for the selection of left-handed chiral compounds in this application. The right-handed chiral compounds include, but are not limited to, one or more of R1011, R2011, R5011, or R811. There are no special requirements for the selection of right-handed chiral compounds in this application. The chiral compounds in this application have a high helical twisting force and are prone to inducing the formation of chiral structures.

[0013] The mass fraction of the chiral compound is from 0.02 part to 1.2 parts, and can be 0.02 part, 0.04 part, 0.06 part, 0.1 part, 0.2 part, 0.4 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, and is preferably from 0.06 part to 1 part.

[0014] The circularly polarized luminescence confinement assembly material includes luminescent materials. In some specific implementation manners, the luminescent materials include, but are not limited to, one or more of metal nanoclusters, fluorescent dyes, rare earth complexes, semiconductor quantum dots, or perovskite quantum dots. There are no special requirements for the selection of luminescent materials in this application. The mass fraction of the luminescent material is from 0.005 part to 0.5 part, and can be 0.005 part, 0.01 part, 0.02 part, 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, and is preferably from 0.01 part to 0.3 part.

[0015] The circularly polarized luminescence confinement assembly material described above includes a photoinitiator. In some specific implementation manners, the photoinitiator includes, but is not limited to, one or more of benzoyl dimethyl ether, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, or 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone. There are no special requirements for the selection of the photoinitiator in this application. The mass fraction of the photoinitiator is from 0.005 parts to 0.3 parts, and can be 0.005 parts, 0.01 parts, 0.02 parts, 0.05 parts, 0.1 parts, 0.2 parts, 0.3 parts, preferably from 0.01 parts to 0.2 parts.

[0016] In some specific implementation manners, the mass ratio of the benzonitrile solvent to the liquid crystal monomer containing acryloyloxy or ester group is 10:1 - 10:50; the mass ratio of the benzonitrile solvent to the chiral compound is 50:1 - 50:20; the mass ratio of the benzonitrile solvent to the luminescent material is 200:1 - 10:1; the mass ratio of the benzonitrile solvent to the photoinitiator is 200:1 - 10:1.

[0017] This application also provides a preparation method of the above-mentioned circularly polarized luminescence confinement assembly material, including:

[0018] Polymerizing a liquid crystal monomer containing acryloyloxy or ester group, a benzonitrile solvent, a chiral compound, a luminescent material, and a photoinitiator to obtain a circularly polarized luminescence confinement assembly material.

[0019] In some specific implementation manners, the polymerization includes mixing a liquid crystal monomer containing acryloyloxy or ester group, a benzonitrile solvent, a chiral compound, a luminescent material, and a photoinitiator to obtain a precursor as a dispersed phase, and performing continuous flow shearing, incubation, and in-situ polymerization with a continuous phase.

[0020] This application first mixes a liquid crystal monomer containing acryloyloxy or ester group, a benzonitrile solvent, a chiral compound, a luminescent material, and a photoinitiator to assemble a precursor as a dispersed phase. In some specific implementation manners, the sum of the concentrations of the liquid crystal monomer containing acryloyloxy or ester group, the chiral compound, the luminescent material, and the photoinitiator in the dispersed phase is 5% to 15%. In some specific implementation manners, the temperature of the mixing is 60°C to 100°C, preferably 65°C to 75°C.

[0021] This application then selects a continuous phase to perform continuous-flow shearing with the above-mentioned dispersed phase to obtain microdroplets. In some specific implementation manners, the continuous phase includes, but is not limited to, sodium dodecyl sulfate solution / polyvinyl alcohol. This application has no special requirements for the selection of the continuous phase. Since the aqueous phase is used to shear the oil phase, selecting sodium dodecyl sulfate solution / polyvinyl alcohol as the continuous phase can achieve the effect of promoting surface activation. In some specific implementation manners, the flow rate ratio of the continuous phase to the dispersed phase is from 1000:1 to 100:1, preferably from 800:1 to 200:1. In some specific implementation manners, the concentration of the sodium dodecyl sulfate solution is 8% to 15%, preferably 10%. In some specific implementation manners, the step of continuous-flow shearing includes injecting the dispersed phase and the continuous phase into a T-shaped microfluidic chip respectively to shear and obtain microdroplets. In some specific implementation manners, the width of the T-shaped microfluidic chip is 20 - 600 μm, and the depth-to-width ratio of the T-shaped microfluidic chip is 1:5 - 1:10. In some specific implementation manners, the step of continuous-flow shearing is as follows: First, use a high-precision syringe pump (flow rate resolution 0.01 μL / min) to inject the dispersed phase and the continuous phase into the microfluidic chip through independent channels respectively. The microfluidic chip is of a glass structure and contains a T-shaped microchannel formed by precision photolithography (width 20 - 600 μm, depth-to-width ratio 1:5 - 1:10); then, by regulating the flow rate ratio of the two phases and the channel size, a high shear force is applied in the shearing region (i.e., the intersection of the T-shaped structure), so that the dispersed phase breaks into uniform microdroplets. By realizing continuous-flow shearing through microfluidic technology, the monodispersity of droplets can be accurately controlled, and the throughput can reach 1 - 10 mL / min (expandable according to the number of parallel channels of the chip). Compared with traditional emulsification shearing (such as rotor-stator homogenization), this method has no mechanical component wear, the energy consumption is reduced by 80%, and the surfactant dosage is reduced by more than 50%, meeting the requirements of green manufacturing.

[0022] This application then incubates and in-situ polymerizes the microdroplets to obtain a circularly polarized luminescence confinement assembly material. In some specific implementation manners, the incubation time is 1 h to 24 h to enable internal molecular rearrangement and in-situ assembly. In some specific implementation manners, the incubation is carried out in a polyvinyl alcohol solution or a sodium dodecyl sulfate solution. In some specific implementation manners, the in-situ polymerization is carried out under ultraviolet irradiation; the wavelength of the ultraviolet irradiation is 350 nm to 400 nm; the power of the ultraviolet irradiation is 50 W to 200 W; the time of the ultraviolet irradiation is 5 min to 30 min. The molecular arrangement of the microdroplets after continuous-flow shearing is chaotic. Adding a polyvinyl alcohol solution or a sodium dodecyl sulfate solution during incubation can induce molecular rearrangement. After assembly, ultraviolet irradiation is carried out, and in-situ polymerization can fix the helical structure and improve the asymmetry factor.

[0023] The preparation method realizes the micro-droplet shearing and in-situ assembly of precursor raw materials through the ingenious assembly of liquid crystal monomers containing acryloxy or ester groups with biphenyl nitrile solvents, chiral compounds, luminescent materials, and photoinitiators, combined with the continuous flow shearing technology, overcoming the deficiencies of traditional synthesis methods in terms of process complexity, cost, and control accuracy. The preparation method is easy to operate and highly controllable, capable of achieving large-scale and low-cost material synthesis, providing a solid technical foundation for practical applications. The reaction controllability adjusts the particle size by flow rate, affecting the conversion rate, and has a high asymmetry factor when the particle size is 120 microns.

[0024] This application also provides a light-emitting device, including the circularly polarized luminescence confinement assembly material described above or the circularly polarized luminescence confinement assembly material prepared by the preparation method described above.

[0025] The circularly polarized luminescence confinement assembly material provided by this application has significant technical advantages and application potential. The circularly polarized luminescence confinement assembly material has excellent luminescence performance, and the luminescence asymmetry factor can be as high as 0.1 - 1.8, far exceeding the performance of traditional materials. Moreover, it can emit stable circularly polarized light, and the helicity and luminescence color can be coordinately adjusted, greatly meeting the material performance requirements in high-performance optoelectronic devices, information security, and biomedicine and other fields; the size of the material is 10 - 300 microns, which is convenient for further processing and integration, improving the processability of the material and the device integration ability. Description of the Drawings

[0026] Figure 1 It is the circularly polarized luminescence spectrum diagram of the circularly polarized luminescence confinement assembly material provided in Examples 1 - 2 of this application;

[0027] Figure 2 It is the luminescence asymmetry factor diagram of the circularly polarized luminescence confinement assembly material provided in Examples 1 - 2 of this application;

[0028] Figure 3 It is the scanning electron microscope diagram of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 of this application;

[0029] Figure 4 It is the polarized light microscope diagram of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 of this application;

[0030] Figure 5 It is the fluorescence spectrum diagram of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 of this application after passing through a left-handed circular polarizer;

[0031] Figure 6 It is the fluorescence spectrum diagram of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 of this application after passing through a right-handed circular polarizer;

[0032] Figure 7The circularly polarized luminescence spectrogram of the right-handed circularly polarized luminescence confinement assembly material provided in Embodiment 3 of the present application;

[0033] Figure 8 The luminescence asymmetry factor diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Embodiment 3 of the present application;

[0034] Figure 9 The circularly polarized luminescence spectrogram of the right-handed circularly polarized luminescence confinement assembly material provided in Embodiment 4 of the present application;

[0035] Figure 10 The luminescence asymmetry factor diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Embodiment 4 of the present application. Detailed implementation manners

[0036] It should be understood that the expression "one or more of..." individually includes each of the objects recited after the expression and various different combinations of two or more of the recited objects, unless otherwise understood from the context and usage. The expression "and / or" in combination with three or more recited objects should be understood to have the same meaning, unless otherwise understood from the context.

[0037] The terms "comprising", "having" or "containing", including the use of their grammatical synonyms, should generally be understood as open-ended and non-restrictive, for example, not excluding other unrecited elements or steps, unless otherwise specifically stated or understood from the context.

[0038] It should be understood that as long as the present application is still operable, the order of steps or the order of performing certain actions is not important. In addition, two or more steps or actions can be performed simultaneously.

[0039] The use of any and all examples or exemplary language such as "for example" or "including" herein is merely intended to better illustrate the present application and does not limit the scope of the present application unless a claim is made. No language in this specification should be construed as indicating that any unclaimed element is essential for the practice of the present application.

[0040] In addition, the numerical ranges and parameters used to define the present application are approximate numerical values, and the relevant numerical values in the specific embodiments have been presented as precisely as possible herein. However, any numerical value inherently inevitably contains standard deviations due to individual test methods. Therefore, unless otherwise clearly stated, it should be understood that all ranges, quantities, numerical values and percentages used in this disclosure are modified by "about". Herein, "about" generally means that the actual numerical value is within plus or minus 10%, 5%, 1% or 0.5% of a specific numerical value or range.

[0041] The present application provides a circularly polarized luminescence confinement assembly material, which is obtained by polymerizing a precursor; the precursor includes, by mass parts: 0.1 part to 15 parts of a liquid crystal monomer containing acryloxy or ester group, 1 part to 10 parts of a biphenyl nitrile solvent, 0.02 part to 1.2 parts of a chiral compound, 0.005 part to 0.5 part of a luminescent material, and 0.005 part to 0.3 part of a photoinitiator.

[0042] The circularly polarized luminescence confinement assembly material provided by the present application has significant technical advantages and application potential. The circularly polarized luminescence confinement assembly material has excellent luminescence performance, and the luminescence asymmetry factor can be as high as 0.1 - 1.8, far exceeding the performance of traditional materials, and can emit stable circularly polarized light, and the helicity and luminescence color can be coordinately adjusted, greatly meeting the requirements for material performance in high-performance optoelectronic devices, information security, biomedicine and other fields; the size of the material is 10 - 300 microns, which is convenient for further processing and integration, and improves the processability of the material and the device integration ability.

[0043] The following further elaborates the present application in conjunction with embodiments. The protection scope of the present application is not limited by the following embodiments.

[0044] Example 1

[0045] This example provides a left-handed circularly polarized luminescence confinement assembly material, which includes, by mass parts: 0.5 part of a liquid crystal monomer containing acryloxy or ester group (1,4-bis-[4-(3-acryloxypropoxy)benzoyloxy]-2-methylbenzene), 1 part of a biphenyl nitrile solvent (including 0.2 part of 4-cyano-4'-pentylbiphenyl, 0.3 part of 4-heptyl-4'-cyanobiphenyl, 0.1 part of 4-n-octylphenyl-4'-phenoxybiphenyl, and 0.4 part of 4,4'-dioxybiphenyl mixed), 0.03 part of a chiral compound (S5011), 0.01 part of a luminescent material (fluorescent dye 3-(2-benzimidazolyl)-7-(diethylamino)coumarin), and 0.01 part of a photoinitiator (benzil dimethyl ketal).

[0046] The preparation method of the left-handed circularly polarized luminescence confinement assembly material includes the following steps:

[0047] 1) Heat the liquid crystal monomer containing acryloxy or ester group, the biphenyl nitrile solvent, the chiral compound, the luminescent material and the photoinitiator to 65 °C, dissolve and mix them evenly, and then cool naturally to obtain a precursor raw material;

[0048] 2) Use the above-obtained precursor raw material as the dispersed phase and a 10% polyvinyl alcohol solution as the continuous phase. Through the continuous flow shear technology, the flow rate ratio of the continuous phase to the dispersed phase is 1000:3, and use the dispersed phase to shear the precursor raw material into micro-droplets;

[0049] 3) The obtained microdroplets were collected in a 15% polyvinyl alcohol solution and incubated for 5 hours for in-situ assembly, and then polymerized by irradiation with 360 nm ultraviolet light for 30 min to obtain a left-handed circularly polarized luminescence confinement assembly material.

[0050] Example 2

[0051] This example provides a right-handed circularly polarized luminescence confinement assembly material. The difference in the preparation method from Example 1 is that the chiral compound S5011 is replaced with the chiral compound R5011.

[0052] Characterize the products provided in Examples 1-2:

[0053] The test method for the circularly polarized luminescence spectrum is as follows: The polymerized circularly polarized luminescence confinement assembly material was respectively encapsulated into quartz wafers with a side length of 2 cm, and a JASCO brand CPL-300 model circularly polarized fluorescence spectrometer in Japan was used to test the circularly polarized luminescence spectrum of the sample; the calculation result of the dissymmetry factor was automatically calculated and derived by software based on the peak intensity obtained from the circularly polarized luminescence spectrum test. The calculation formula is: luminescence dissymmetry factor = 2(I L -I R ) / (I L +I R ), where I L and I R represent the intensities of left-handed and right-handed polarized light respectively, both measured by the above-mentioned instrument.

[0054] Fluorescence spectrum: A Hitachi brand F-4700 model fluorescence spectrophotometer in Japan was used to analyze the fluorescence spectrum of the sample.

[0055] Figure 1 is the circularly polarized luminescence spectrum of the circularly polarized luminescence confinement assembly material provided in Examples 1-2, Figure 2 is the luminescence dissymmetry factor map of the circularly polarized luminescence confinement assembly material provided in Examples 1-2. It can be seen from Figure 1 that the luminescence dissymmetry factor of the prepared circularly polarized luminescence confinement assembly material is as high as 0.9 (the theoretical maximum value is 2), indicating that a material with strong circularly polarized luminescence performance can be successfully prepared by the described preparation method. Figure 3 is the scanning electron microscope image of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1. It can be seen that the morphology of the prepared circularly polarized luminescence confinement assembly material is uniform, and the diameter of a single material is about 120 μm. Figure 4 is the polarized light microscope image of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1. It can be seen that there is an obvious birefringence phenomenon, indicating that the molecules in the obtained circularly polarized luminescence confinement assembly material have a chiral helical structure. Figure 5Fluorescence spectrum of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 after passing through a left-handed circular polarizer. Figure 6 Fluorescence spectrum of the left-handed circularly polarized luminescence confinement assembly material provided in Example 1 after passing through a right-handed circular polarizer. The fluorescence spectrum shows an obvious difference in luminescence intensity.

[0056] Example 3

[0057] This example provides a right-handed circularly polarized luminescence confinement assembly material, which includes, by mass: 3.5 parts of a liquid crystal monomer containing acryloyloxy or ester group (a mixture of 1.5 parts of 1,4-bis-[4-(3-acryloyloxypropoxy)benzoyloxy]-2-methylbenzene and 2 parts of 2-methyl-1,4-phenylene bis(4-((6-(acryloyloxy)hexyl)oxy)benzoate)), 10 parts of a biphenyl nitrile solvent (4-cyano-4'-pentylbiphenyl), 0.28 part of a chiral compound (R811), 0.5 part of a luminescent material (semiconductor quantum dot InP / ZnSeS / ZnS), and 0.3 part of a photoinitiator (diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide).

[0058] The preparation method of the right-handed circularly polarized luminescence confinement assembly material includes the following steps:

[0059] Heat the liquid crystal monomer containing acryloyloxy or ester group, the biphenyl nitrile solvent, the chiral compound, the luminescent material, and the photoinitiator to 100 °C to dissolve and mix them evenly, and then cool naturally to obtain a precursor raw material.

[0060] Take the above-obtained precursor raw material as the dispersed phase and an 8% polyvinyl alcohol solution as the continuous phase. Through the continuous flow shear technology, the flow rate ratio of the continuous phase to the dispersed phase is 1000:50, and use the dispersed phase to shear the precursor raw material into microdroplets.

[0061] Collect the obtained microdroplets into a 10% polyvinyl alcohol solution and incubate for 12 hours to perform in-situ assembly, and then irradiate with 365 nm ultraviolet light for 45 min to polymerize to obtain a right-handed circularly polarized luminescence confinement assembly material.

[0062] Characterize the product obtained in Example 3. Figure 7 Circularly polarized luminescence spectrum diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Example 3. Figure 8 Luminescence dissymmetry factor diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Example 3. It can be seen that the luminescence dissymmetry factor of the prepared right-handed circularly polarized luminescence confinement assembly material exceeds 0.5, indicating that a green circularly polarized luminescence confinement assembly material based on semiconductor quantum dots can be successfully prepared by the described preparation method. Figure 7-8

[0063] Example 4

[0064] This embodiment provides a right-handed circularly polarized luminescence confinement assembly material, which includes, by mass fraction: 2 parts of liquid crystal monomers containing acryloyloxy or ester groups (where 0.5 part of 1,4-bis-[4-(3-acryloyloxypropoxy)benzoyloxy]-2-methylbenzene, 0.5 part of 4-[(4-nitrophenoxy)carbonyl]phenyl 2,4-dimethoxybenzoate, and 1 part of 4-[[6-[(1-oxo-2-propenyl)oxy]hexyl]oxy]benzoic acid are mixed), 3 parts of biphenyl nitrile solvents (where 1 part of 4-cyano-4'-pentylbiphenyl, 0.5 part of 4-heptyl-4'-cyanobiphenyl, 1 part of 4'-n-pentyloxy-4-cyanobiphenyl, and 0.5 part of 4'-n-octyloxy-4-cyanobiphenyl are mixed), 0.2 part of chiral compound (R2011), 0.1 part of luminescent material (Eu-based rare earth complex), and 0.1 part of photoinitiator (benzil dimethyl ketal).

[0065] Its preparation method includes the following steps:

[0066] 1) Heat the liquid crystal monomers containing acryloyloxy or ester groups, biphenyl nitrile solvents, chiral compound, luminescent material, and photoinitiator to 75 °C, dissolve and mix them evenly, and then cool naturally to obtain a precursor raw material;

[0067] 2) Use the obtained precursor raw material as the dispersed phase and 10% sodium dodecyl sulfate solution as the continuous phase. Through the continuous flow shearing technique, the flow rate ratio of the continuous phase to the dispersed phase is 1000:9, and use the dispersed phase to shear the precursor raw material into microdroplets;

[0068] 3) Collect the obtained microdroplets into 10% sodium dodecyl sulfate solution and incubate for 8 hours to enable in-situ assembly, and then polymerize by irradiating with 380 nm ultraviolet light for 35 min to obtain the right-handed circularly polarized luminescence confinement assembly material.

[0069] Characterize the product obtained in Example 4. Figure 9 is the circularly polarized luminescence spectrum diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Example 4. Figure 10 is the luminescence asymmetry factor diagram of the right-handed circularly polarized luminescence confinement assembly material provided in Example 4. It can be seen from Figure 9-10 that the luminescence asymmetry factor of the prepared right-handed circularly polarized luminescence confinement assembly material exceeds 0.5, indicating that the confinement assembly material based on rare earth complex with red circularly polarized luminescence can be successfully prepared by the described preparation method.

[0070] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution of the present application and its application concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. A circularly polarized luminescent confined assembly material, characterized in that: Obtained by polymerization of precursors; The precursor includes, by mass, 0.1 to 15 parts of a liquid crystal monomer containing an acryloxy group or an ester group, 1 to 10 parts of a biphenyl nitrile solvent, 0.02 to 1.2 parts of a chiral compound, 0.005 to 0.5 parts of a luminescent material, and 0.005 to 0.3 parts of a photoinitiator.

2. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The liquid crystal monomer containing an acryloxy group or an ester group includes one or more of 1,4-bis-[4-(3-acryloxypropoxy)benzoyloxy]-2-methylbenzene, 2-methyl-1,4-phenylenebis(4-((6-(acryloxy)hexyl)oxy)benzoate), 2,4-dimethoxybenzoic acid-4-[(4-nitrophenoxy)carbonyl]phenol ester or 4-[[6-[(1-oxo-2-propenyl)oxy]hexyl]oxy]benzoic acid-4-methoxyphenyl ester.

3. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The biphenylnitrile solvent includes one or more of 4-cyano-4'-pentylbiphenyl, 4-heptyl-4'-cyanobiphenyl, 4-n-octylphenyl-4'-phenoxybiphenyl, 4,4'-dioxybiphenyl, 4-n-octylphenyl-4'-oxybiphenyl, 4'-n-pentyloxy-4-cyanobiphenyl, 4'-n-octyloxy-4-cyanobiphenyl or 4'-n-pentyl-4-cyanoterphenyl.

4. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The chiral compound includes a left-handed chiral compound or a right-handed chiral compound; the left-handed chiral compound includes one or more of S1011, S2011, S5011 or S811; the right-handed chiral compound includes one or more of R1011, R2011, R5011 or R811.

5. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The luminescent material includes one or more of metal nanoclusters, fluorescent dyes, rare earth complexes, semiconductor quantum dots or perovskite quantum dots.

6. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The photoinitiator includes one or more of benzil dimethyl ether, diphenyl (2,4,6,-trimethylbenzoyl) phosphine oxide or 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone.

7. The circularly polarized light-emitting confined assembly material according to claim 1, characterized in that: The particle size of the circularly polarized luminescent confined assembly material is 10 microns to 300 microns.

8. A method for preparing a circularly polarized light-emitting confined assembly material according to any one of claims 1 to 7, characterized in that: include: Liquid crystal monomers containing acryloyloxy or ester groups, biphenyl nitrile solvents, chiral compounds, luminescent materials and photoinitiators are polymerized to obtain circularly polarized luminescent confined assembly materials.

9. The preparation method according to claim 8, characterized in that: The polymerization includes mixing a liquid crystal monomer containing an acryloxy group or an ester group, a biphenyl nitrile solvent, a chiral compound, a luminescent material and a photoinitiator to obtain a precursor as a dispersed phase, and performing continuous flow shearing, incubation and in-situ polymerization with a continuous phase; the flow rate ratio of the continuous phase to the dispersed phase is 1000:1 to 100:1; and the incubation time is 1 hour to 24 hours.

10. A light emitting device, characterized in that: It includes the circularly polarized luminescent confined assembly material as described in any one of claims 1 to 7 or the circularly polarized luminescent confined assembly material prepared by the preparation method as described in claim 8 or 9.

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