An aggregation-induced emission material, a preparation method and application thereof

Abstract

The application discloses an aggregation-induced emission material, a preparation method and application thereof, and belongs to the technical field of preparation of the aggregation-induced emission material. The aggregation-induced emission material prepared by the application is an organic small molecule with an aggregation-induced emission effect. The fluorescent solar concentrator prepared by using the aggregation-induced emission material overcomes the problem of low efficiency of the existing fluorescent solar concentrator, and especially overcomes the problem of great efficiency attenuation caused by the increase of the device size.

Description

Technical Field

[0001] This invention relates to the field of aggregation-induced emission material preparation technology, and in particular to an aggregation-induced emission material, its preparation method, and its application. Background Technology

[0002] Fluorescent solar concentrators (LSCs) are simple light-absorbing, converting, and concentrating devices. They consist of a transparent thin plate with a high refractive index, into which a low concentration of light-emitting material (luminescent or fluorescent material) is embedded. The light-emitting material in an LSC absorbs most of the light in the solar radiation spectrum and then re-emits it at a longer wavelength through a photoluminescence (PL) process. Photoluminescence is a photochemical process that occurs in many optical and semiconductor organic and inorganic materials. Furthermore, in addition to including the fluorescent emitter in the host matrix, this system relies on optical waveguide principles and additional peripheral photovoltaic (PV) cells to convert fluorescent photons into electrical energy, thereby improving the photoelectric conversion efficiency per unit area of ​​the solar cell.

[0003] Because fluorescent materials exhibit self-absorption (i.e., the absorption and emission spectra overlap), and fluorescence undergoes multiple self-absorption processes during optical waveguide operation, the intensity reaching the device edge is significantly reduced during fluorescence transmission. Furthermore, the photoelectric conversion efficiency of fluorescent solar concentrators decreases substantially with increasing device size. Moreover, the efficiency of fluorescent solar concentrators is also affected by the fluorescence quantum yield of the fluorescent material itself. For example, molecules emitting red light (emission wavelength greater than 600 nm) have low fluorescence quantum yields and exhibit severe self-absorption. Therefore, how to achieve weak self-absorption and high fluorescence quantum yield in aggregation-induced emission materials to fabricate high-efficiency fluorescent solar concentrators has become a pressing technical challenge for those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an aggregation-induced emission material, its preparation method, and its application, in order to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] One of the technical solutions of the present invention is an aggregation-induced emission material, the structural formula of which is shown in formula (1):

[0007]

[0008] R1 and R2 are each independently selected from H, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, n-pentyl, or n-hexyl;

[0009] R3 is selected from

[0010] Modification of the thiophene ring by R1 and R2 can change the aggregated state structure of the compound, resulting in higher fluorescence quantum efficiency in the aggregated state.

[0011] The second technical solution of the present invention: a method for preparing the above-mentioned aggregation-induced emission material, comprising the following steps:

[0012] (1) Under a protective atmosphere, thiophenecaraldehyde, phenanthrenequinone, aniline, ammonium chloride and catalyst with different substitutions were mixed and Maillard reaction was carried out under the catalysis of acid solution. After purification, the intermediate was obtained.

[0013] The structural formulas of the thiophene formaldehydes with different substitutions are as follows:

[0014] The structural formula of the intermediate is as follows:

[0015] (2) Under a protective atmosphere, the intermediate, compound 1, 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentoborane-2-yl)-2,1,3-benzothiadiazole and solvent were mixed evenly and then subjected to Suziki coupling reaction under alkaline conditions. After purification, the aggregation-induced luminescence material was obtained.

[0016] The structural formula of compound 1 is as follows:

[0017] R1 and R2 are each independently selected from H, methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, n-pentyl, or n-hexyl;

[0018] X is a borate group, borate ester group, Br, or I.

[0019] Further, in step (1), the molar ratio of the different substituted thiophene formaldehyde, phenanthrenequinone, aniline and ammonium chloride is 1:1:1:1, 1:1:2:1.5 or 1:1:2.5:1.5;

[0020] The Maillard reaction is carried out at a temperature of 120–130 °C.

[0021] The catalyst includes ammonium acetate, potassium acetate, or sodium acetate.

[0022] Further, in step (1), the purification method includes: quenching the crude product obtained after the Maillard reaction with water and then adding dichloromethane for extraction, and separating the extract by a chromatography column;

[0023] The eluent used in the chromatography column separation is a mixture of dichloromethane and petroleum ether in a volume ratio of 1:1.

[0024] Further, in step (2), the molar ratio of the intermediate, compound 1, and 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentoborane-2-yl)-2,1,3-benzothiadiazole is 1:1:1, 1.1:1:1, or 1:1:1.1;

[0025] The Suziki coupling reaction was carried out at a temperature of 90–100 °C for a time of 12–36 h.

[0026] The solvent is a mixture of toluene and water in a volume ratio of 20:3, 4:1, 5:1 or 5:2.

[0027] Further, in step (2), the purification method includes: quenching the crude product obtained after the Suziki coupling reaction with water and then extracting it with dichloromethane, and separating the extract by a chromatography column;

[0028] The eluent used in the chromatography column separation is a mixture of dichloromethane and petroleum ether in a volume ratio of 1:1.

[0029] The structural formula of the aggregation-induced emission material is as follows:

[0030]

[0031] The third technical solution of the present invention: the application of the above-mentioned aggregation-induced emission material in the preparation of fluorescent solar concentrators.

[0032] The fourth technical solution of the present invention: a fluorescent solar concentrator, comprising the above-mentioned aggregation-induced light-emitting material.

[0033] Fifth technical solution of the present invention: A method for preparing the above-mentioned fluorescent solar concentrator, comprising the following steps:

[0034] The aggregation-induced light-emitting material is added to a polymer solution, mixed evenly, coated onto a substrate, and dried to obtain the fluorescent solar concentrator.

[0035] The sixth technical solution of the present invention: an application of the above-mentioned fluorescent solar concentrator in plant cultivation.

[0036] The present invention discloses the following technical effects:

[0037] (1) The aggregation-induced emission material prepared in this invention is an organic small molecule with aggregation-induced emission effect. The fluorescent solar concentrator prepared using this aggregation-induced emission material overcomes the problem of low efficiency of existing fluorescent solar concentrators (low red light fluorescence quantum efficiency), especially the problem of efficiency decay caused by self-absorption phenomenon and size increase (that is, the fluorescent solar concentrator prepared in this invention has the advantages of high fluorescence quantum yield and weak self-absorption of red light).Figure 2 and Figure 6 ).

[0038] (2) This invention designs the molecular structure of the compound and modifies and replaces the electron donor and acceptor at different chemical sites (such as the position of the alkyl chain), thereby changing the molecular configuration and conformation of the aggregated state, thereby improving the fluorescence quantum efficiency of the molecule (compared to the solution state, the aggregated state can be improved by up to 20%), increasing the Stokes shift, and weakening self-absorption.

[0039] (3) The synthesis steps of the aggregation-induced emission material of the present invention are simple, which not only allows for efficient and large-scale preparation, but also results in aggregation-induced emission materials with high fluorescence quantum efficiency, large Stokes shift, wide visible light absorption spectrum, and excellent resistance to photobleaching. Figure 6 ).

[0040] (4) By measuring the photoelectric conversion efficiency of the fluorescent solar concentrator prepared in this invention, it was demonstrated that its efficiency decreases only slightly with increasing size. The large-size fluorescent solar concentrator (0.04 square meters) still maintains a photoelectric conversion efficiency of 1.7%.

[0041] (5) The fluorescent solar concentrator prepared in this invention is combined with the outer wall of the greenhouse for greenhouse plant cultivation. This can reduce the inhibitory effect of ultraviolet light on crop growth, improve the quality of transmitted light, promote crop photosynthesis, and increase agricultural crop yield. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a photograph of the fluorescent solar concentrator prepared in Example 7;

[0044] Figure 2 Fluorescence quantum yield diagrams of the fluorescent solar concentrators prepared in Examples 7 (A1), 10 (A2), and 11 (A3) in different states (aggregated and non-aggregated);

[0045] Figure 3 The JV characteristic curve of the fluorescent solar concentrator prepared in Example 7 is shown.

[0046] Figure 4 CIE image of the fluorescent solar concentrator prepared in Example 7;

[0047] Figure 5 The fresh weight of plants in a greenhouse based on a fluorescent solar concentrator is shown in Example 13.

[0048] Figure 6 The absorption and fluorescence spectra of the fluorescent solar concentrator prepared in Example 7 are shown. Detailed Implementation

[0049] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0050] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0051] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0052] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be obvious to those skilled in the art. This specification and embodiments are merely exemplary.

[0053] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0054] In the following examples, "parts" refers to "parts by weight".

[0055] Example 1

[0056] A method for preparing an aggregation-induced emission material (A1):

[0057] (1) In a N2 atmosphere, 5-bromothiophene-2-carboxaldehyde (2 mmol), phenanthrenequinone (2 mmol), aniline (2 mmol), ammonium chloride (2 mmol), and catalyst (ammonium acetate, 2.5 mmol) were added to a 250 mL three-necked flask. 90 mL of acetic acid was added to the system for deoxygenation. The reaction mixture was refluxed at 130 °C (Maillard reaction), and the reaction progress was monitored using TLC. After the reaction was complete, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 volume ratio of dichloromethane and petroleum ether to obtain a pale yellow powder product A1a (yield 95%).

[0058] (2) In a nitrogen atmosphere, A1a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentylborane-2-yl)-2,1,3-benzothiadiazole (2 mmol), 1-bromo-4-(1,2,2-tristyryl)benzene (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a 5:1 mixture of toluene and water. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 mixture of dichloromethane and petroleum ether to obtain the red powder product A1 (yield 56%).

[0059] The chemical reaction equation is as follows:

[0060]

[0061] The A1 proton spectrum data are as follows: 1 H NMR (500MHz, CDCl3) δ8.82(d,J=7.9Hz,1H),8.73(d,J=8.3Hz,1H),8.67(d,J=8.3Hz,1H),7.80-7.57(m,7H), 7.49(ddd,J=8.3,7.0,1.4Hz,1H),7.27-7.20(m,1H),7.12-7.07(m,1H),6.84(d,J=4.0Hz,1H),6.62(s,1H).

[0062] Example 2

[0063] A method for preparing an aggregation-induced emission material (A2):

[0064] (1) In a N2 atmosphere, 2-bromo-3-hexylthiophene-5-carboxaldehyde (2 mmol), phenanthrenequinone (2 mmol), aniline (2 mmol), ammonium chloride (2 mmol), and catalyst (ammonium acetate, 2.5 mmol) were added to a 250 mL three-necked flask. 90 mL of acetic acid was added to the system for deoxygenation. The reaction mixture was refluxed at 130 °C (Maillard reaction), and the reaction progress was monitored using TLC. After the reaction was complete, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 volume ratio of dichloromethane and petroleum ether to obtain a pale yellow powder product A2a (yield 92%).

[0065] (2) Under a nitrogen atmosphere, A2a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentylborane-2-yl)-2,1,3-benzothiadiazole (2 mmol), 1-bromo-4-(1,2,2-tristyryl)benzene (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a toluene-water mixture with a volume ratio of 5:2. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 volume ratio of dichloromethane and petroleum ether to obtain a red-orange powder product A2 (yield 58%).

[0066] The chemical reaction equation is as follows:

[0067]

[0068] The A2 proton spectrum data are as follows: 1 H NMR(500MHz,CD2Cl2)δ8.80(dd,J=24.9,8.4Hz,3H),7.87-7.67(m,11H),7.57(t,J=7.8Hz,1H),7.33(t,J=7.7Hz,1H),7.2 9-7.08(m,18H),2.54(t,J=7.9Hz,2H),1.46(d,J=10.2Hz,2H),1.19(d,J=6.2Hz,4H),0.89(ddq,J=15.6,10.3,7.6Hz,5H).

[0069] Example 3

[0070] A method for preparing an aggregation-induced emission material (A3):

[0071] (1) In a N2 atmosphere, 5-bromo-3-hexylthiophene-2-carboxaldehyde (2 mmol), phenanthrenequinone (2 mmol), aniline (2 mmol), ammonium chloride (2 mmol), and catalyst (ammonium acetate, 2.5 mmol) were added to a 250 mL three-necked flask. 90 mL of acetic acid was added to the system for deoxygenation. The reaction mixture was refluxed at 130 °C (Maillard reaction), and the reaction progress was monitored using TLC. After the reaction was complete, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 volume ratio of dichloromethane and petroleum ether to obtain a white powder product A3a (yield 97%).

[0072] (2) Under a nitrogen atmosphere, A3a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentylborane-2-yl)-2,1,3-benzothiadiazole (2 mmol), 1-bromo-4-(1,2,2-tristyryl)benzene (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a 4:1 mixture of toluene and water. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 mixture of dichloromethane and petroleum ether to obtain a red-orange powder product A3 (65% yield).

[0073] The chemical reaction equation is as follows:

[0074]

[0075] The A3 proton NMR data are: red-orange powder product A3 (65%). 1H NMR (500MHz, CD2Cl2) δ8.85(t,J=7.9Hz,2H),8.78(d,J=8.4Hz,1H),8.07(s,1H),7. 82(t,J=7.5Hz,4H),7.75-7.62(m,7H),7.58(t,J=7.8Hz,1H),7.34(t,J=7.7Hz,1H) ,7.27(d,J=8.4Hz,1H),7.19(tt,J=15.7,8.4Hz,15H),7.10(d,J=6.5Hz,2H),3.03( t,J=7.9Hz,2H), 1.77(t,J=7.9Hz,2H), 1.23(t,J=7.1Hz,4H), 0.90(t,J=7.3Hz,5H).

[0076] Example 4

[0077] A method for preparing an aggregation-induced emission material (B1):

[0078] (1) Same as Example 1.

[0079] (2) In a nitrogen atmosphere, A1a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentoboron-2-yl)-2,1,3-benzothiadiazole (2 mmol), triphenylamine 4-borate (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a 4:1 mixture of toluene and water. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 mixture of dichloromethane and petroleum ether to obtain product B1 (68% yield).

[0080] Example 5

[0081] A method for preparing aggregation-induced emission material (B2):

[0082] (1) Same as Example 2.

[0083] (2) Under a nitrogen atmosphere, A2a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentoboron-2-yl)-2,1,3-benzothiadiazole (2 mmol), triphenylamine 4-borate (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a 4:1 mixture of toluene and water. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 mixture of dichloromethane and petroleum ether to obtain product B2 (62% yield).

[0084] Example 6

[0085] A method for preparing an aggregation-induced emission material (B3):

[0086] (1) Same as Example 3.

[0087] (2) Under a nitrogen atmosphere, A3a (2 mmol), 4,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxapentoboron-2-yl)-2,1,3-benzothiadiazole (2 mmol), triphenylamine 4-borate (2 mmol), and potassium carbonate (6 mmol) were added to 20 mL of a 4:1 mixture of toluene and water. The reaction solution was reacted at 100 °C for 12 h (Suziki coupling reaction), and the reaction progress was monitored by TLC. After the reaction was completed, the reaction solution was cooled to room temperature. The crude product was quenched with water and extracted with dichloromethane. The dichloromethane layer was collected, and the solvent was removed by vacuum distillation. The crude product was separated by column chromatography using a 1:1 mixture of dichloromethane and petroleum ether to obtain product B3 (yield 53%).

[0088] Example 7

[0089] A method for preparing a fluorescent solar concentrator:

[0090] 5g of polymethyl methacrylate was dissolved in toluene and stirred until completely dissolved to prepare a polymer solution with a concentration of 18 wt.%. Compound A1 prepared in Example 1 was added to the polymer solution, mixed thoroughly, and sonicated for 20 min to completely remove air bubbles, resulting in a concentration of 3 wt.% for Compound A1 in the system. The resulting solution was coated onto the surface of a glass substrate using a coating machine and placed in an 80°C oven for solvent evaporation to form a film. The evaporation time was 48 h, yielding a fluorescent solar concentrator (film thickness of 20 μm).

[0091] Example 8

[0092] Same as Example 7, except that the concentration of compound A1 in the system is 2 wt.%.

[0093] Example 9

[0094] Same as Example 7, except that the concentration of compound A1 in the system is 1 wt.%.

[0095] Example 10

[0096] Same as Example 7, except that compound A1 is replaced with compound A2.

[0097] Example 11

[0098] Same as Example 7, except that compound A1 is replaced with compound A3.

[0099] Example 12

[0100] Same as Example 7, except that compound A1 is replaced with compound B1.

[0101] Example 1

[0102] (1) A physical image of the fluorescent solar concentrator prepared in Example 7 is shown below. Figure 1 .

[0103] (2) The fluorescence quantum yields of the fluorescent solar concentrators prepared in Examples 7 (A1), 10 (A2), and 11 (A3) under different states (aggregated and non-aggregated states) are shown in the figure. Figure 2 .

[0104] from Figure 2 As can be seen, compounds A1 and A2 exhibit higher fluorescence quantum yields in their non-aggregated state (solution state) than in their aggregated state (thin film state). By changing the position of the alkyl chain, molecule A3 exhibits a high fluorescence quantum yield in the aggregated state. This demonstrates that compounds with high fluorescence quantum yields in different states can be obtained through compound structure design, making them suitable for use in different fluorescent solar concentrators.

[0105] (3) The JV characteristic curves of the fluorescent solar concentrators (of different areas) prepared in Example 7 are shown in the figure. Figure 3 .

[0106] from Figure 3 As can be seen, with the increase of the size of the fluorescent solar concentrator, the voltage increases and the current density decreases. According to the formula: PCE(V OC J SC The photoelectric conversion efficiency (PCE) was calculated by FF / F0, and it was found that the PCE only slightly decreased with the increase of size.

[0107] (4) The CIE image of the fluorescent solar concentrator prepared in Example 7 is shown in [reference needed]. Figure 4 .

[0108] from Figure 4 As can be seen, the fluorescent solar concentrator mainly exhibits an orange color, which is not much different from AM1.5G (sunlight).

[0109] Example 13

[0110] A greenhouse construction and plant cultivation process based on a fluorescent solar concentrator:

[0111] The fluorescent solar concentrator prepared in Example 11 was used to construct the glass of the greenhouse in the experimental group. The edges of the fluorescent solar concentrator were equipped with solar cells (including but not limited to monocrystalline silicon solar cells, polycrystalline silicon solar cells, perovskite solar cells, and preferably monocrystalline silicon solar cells). The solar panels were connected to a battery via a circuit to store the electrical energy generated by the fluorescent solar concentrator.

[0112] An experiment was conducted inside an artificial climate chamber simulating a glass greenhouse. The simulated greenhouse had dimensions of 30cm in length, 20cm in width, and an area of ​​600cm². 2 White light intensity 200 μmolm -2 s -1 Two UVA (340nm, 8W) and one UVB (311nm, 15W) ultraviolet light sources were added. The temperature was 26℃ during the light exposure period and 24℃ during the darkness period, with a humidity of 55%.

[0113] The experimental crop was lettuce, and the seeds were purchased online. Four days after sowing, the seedlings germinated and were transplanted, one seedling per pot. These were placed under a simulated glass greenhouse, which was divided into two equal areas separated by black cardstock to create relatively independent experimental spaces. Two healthy seedlings of uniform growth were planted in each area. Water and fertilizer management was carried out according to standard procedures. To obtain more accurate experimental data, ordinary glass was used as the experimental cover (blank group), and two experimental groups were set up.

[0114] Fifteen days after sowing, plant growth was monitored and photographed. Finally, the fresh weight of lettuce was measured under each experimental condition, and the average value was calculated. The results are shown below. Figure 5 .

[0115] Compared with the control group, the fresh weight of lettuce in the experimental group increased by 41.13%, indicating that the greenhouse using the fluorescent solar concentrator prepared by this invention can improve the utilization rate of sunlight for crops and enhance their photosynthetic capacity. The greenhouse using the fluorescent solar concentrator prepared by this invention can convert some of the ultraviolet light that is detrimental to plant growth into orange-red light that is absorbed and utilized by chlorophyll a, b, and carotenoids. Figure 6 This improves the quality of transmitted light, promotes crop photosynthesis, and increases agricultural crop yields.

[0116] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A fluorescent solar concentrator that converts ultraviolet light into orange-red light, characterized in that, Including the aggregation-induced emission material described in Formula A3; 。 2. A method for preparing the fluorescent solar concentrator according to claim 1, characterized in that, Includes the following steps: The aggregation-induced light-emitting material is added to a polymer solution, mixed evenly, coated onto a substrate, and dried to obtain the fluorescent solar concentrator. The polymer is polymethyl methacrylate.

3. The application of the fluorescent solar concentrator of claim 1 in plant cultivation, characterized in that, The fluorescent solar concentrator is integrated into the outer wall of a greenhouse for greenhouse plant cultivation. It converts some of the ultraviolet light that is not conducive to plant growth into orange-red light that is absorbed and utilized by chlorophyll a, b and carotenoids, thereby reducing the inhibitory effect of ultraviolet light on crop growth, improving the quality of transmitted light, promoting crop photosynthesis and increasing agricultural crop yield.

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