A single-matrix full-spectrum luminescent polyvinyl fluoride ferroelectric film based on segment synergistic construction regulation and a preparation method and application thereof
By constructing a main-chain conjugated structure in ferroelectric polymers through a segment synergistic construction strategy, full-spectrum luminescence and ferroelectric properties are maintained simultaneously, solving the problems of insufficient luminescence performance and poor biocompatibility in existing technologies, and providing high-performance optoelectronic integrated materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANHU BRAIN COMPUTER CROSS RES INST
- Filing Date
- 2026-02-05
- Publication Date
- 2026-05-29
AI Technical Summary
Existing ferroelectric polymers such as P(VDF-TrFE) have weak intrinsic luminescence behavior, mainly concentrated in the blue-violet light region, which makes it difficult to meet the requirements of high-performance optoelectronic integrated devices for tunable luminescence and broadband output. Furthermore, the introduction of external luminescent functional units leads to poor biocompatibility and a decrease in ferroelectric performance.
By constructing a main-chain conjugated structure through a controlled chain rearrangement reaction and combining it with a chain segment co-construction strategy, a single polymer matrix is formed, which simultaneously maintains broadband luminescence and ferroelectric properties, avoiding the introduction of exogenous luminescent components.
This method achieves full-spectrum luminescence within a single polymer matrix while maintaining ferroelectric properties, solving the problems of poor biocompatibility and performance degradation in traditional methods, and providing a novel flexible opto-electric functional material that is simple to process and easy to scale up.
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Figure CN122103631A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of polymer functional materials and opto-electric coupling materials, specifically relating to a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on chain segment synergistic construction regulation, its preparation method and application. Background Technology
[0002] With the rapid development of optoelectronic devices and flexible electronics, ferroelectric materials have crucial applications in optoelectronic devices, biostimulation and sensing, information display, and ferroelectric storage. Traditional ferroelectric polymers such as poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) possess excellent polarization response, flexible processability, and chemical stability, demonstrating significant application potential in energy harvesting, biosensing, piezoelectric actuation, and ferroelectric storage. However, P(VDF-TrFE) exhibits weak intrinsic luminescence behavior, primarily concentrated in the blue-violet region, making it difficult to meet the demands of high-performance optoelectronic devices for tunable luminescence and broad-spectrum output. Furthermore, since much of the fluorescence background noise in biological systems is also concentrated in this region, it is difficult to localize within organisms via fluorescence, limiting its development in biological applications.
[0003] In existing technologies, PVDF-based ferroelectric polymer composite luminescence typically employs a strategy of introducing exogenous luminescent functional units. For example, Chinese patent CN118895122A discloses a method for synthesizing inorganic mechanoluminescent phosphors via high-temperature solid-state reaction, then combining them with polymers such as PVDF and PVDF-TrFE to prepare mechanostimulation-responsive luminescent composite materials. Another example is Chinese patent CN116056534A, which discloses a method for in-situ generation of perovskite quantum dots through stepwise crystallization in a PVDF matrix, forming a quantum dot / polymer composite film to improve photoluminescence performance and stability. While these methods achieve some degree of luminescence performance enhancement, they all essentially rely on introducing exogenous inorganic luminescent centers into the polymer matrix or forming dispersed luminescent units through heterogeneous crystallization. Common problems include poor biocompatibility and insufficient mixing. Furthermore, exogenous luminescent groups often disrupt the crystalline structure of the ferroelectric polymer, leading to a significant decrease in ferroelectric performance and making it impossible to simultaneously achieve the integration of optical and ferroelectric properties.
[0004] Therefore, developing a single-matrix ferroelectric polymer construction technology that can simultaneously achieve broad-spectrum luminescence and excellent ferroelectric properties, while also possessing good biocompatibility and simple processing is of great value and significance. Summary of the Invention
[0005] The purpose of this invention is to provide a method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on chain segment synergistic construction. The method constructs a main chain conjugated structure through a controlled chain segment rearrangement reaction and combines a chain segment synergistic construction strategy to simultaneously maintain broadband luminescence and ferroelectric properties. The process is simple, uses a single matrix, and operates under mild conditions. The resulting film is uniform and highly practical.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction, the method comprising the following steps: (1) Dissolve polyvinylidene fluoride ferroelectric polymer powder in an organic solvent and stir to obtain a transparent solution; (2) Take the transparent solution obtained in step (1) and divide it into at least three portions. One portion is kept in its original state to retain the original chain segment. The remaining portions are each added with different amounts of small molecule alkaline reagents. Under the action of alkaline medium, the polymer backbone undergoes structural rearrangement to different degrees, forming different π-π conjugated structures, thereby obtaining at least three reaction solutions. (3) Drop at least three portions of the reaction solution obtained in step (2) into the aqueous phase, filter and dry the solids after precipitation to obtain polyvinylidene fluoride solids without conjugation degree and at least two portions of polyvinylidene fluoride solids with different Π conjugation degree. (4) The polyvinylidene fluoride solid obtained in step (3) without conjugation degree and at least two polyvinylidene fluoride solids with different Π conjugation degree are mixed and redissolved in an organic solvent and stirred to form a transparent solution with yellow fluorescence. (5) The transparent solution obtained in step (4) is dripped onto the substrate, dried to remove the organic solvent and subjected to heat treatment to prepare a polyvinylidene fluoride ferroelectric thin film that can achieve photoluminescent full-spectrum emission in a single polymer matrix.
[0007] The preparation method provided by this invention constructs a main chain conjugated structure through a controlled chain segment rearrangement reaction and achieves ultra-broad spectrum photoluminescence on a single polymer matrix through a chain segment cooperative construction strategy. Specifically, in step (2), under the action of an alkaline medium, the polymer main chain undergoes structural rearrangement to form a conjugated structure; and under the action of different amounts of small molecule alkaline reagents, different degrees of main chain rearrangement reaction are achieved.
[0008] The preparation method provided by this invention is a ferroelectric polymer material that achieves photoinduced full-spectrum fluorescence emission through chain-level structure regulation. In particular, it relates to a method for constructing a main chain conjugated structure by undergoing a chain segment rearrangement reaction under the action of an alkaline medium and combining it with a chain segment synergistic construction strategy to form a single polymer matrix with broad-spectrum luminescence; or it can be referred to as a method for preparing a single-matrix photoinduced full-spectrum fluorescence emission ferroelectric polymer material.
[0009] Preferably, in step (1), the organic solvent is N,N-dimethylformamide; in step (2), the small molecule basic reagent is selected from low molecular weight fatty amines, preferably methylamine, ethylamine, dimethylamine, or ethanolamine; Preferably, the amount of the small molecule alkaline reagent added in step (2) accounts for 3% to 25% of the mass of the polyvinylidene fluoride polymer powder. Preferably, the small molecule alkaline reagent is methylamine.
[0010] Preferably, in step (1), 0.2~0.8g of polyvinylidene fluoride polymer powder is dissolved in 4.5g of N,N-dimethylformamide; in step (2), depending on the required degree of rearrangement, 0.02~0.15g of methylamine solution is added to the solution obtained in step (1).
[0011] In step (4), polyvinylidene fluoride solids with different degrees of π-conjugation and polyvinylidene fluoride solids without π-conjugation are mixed sequentially in increasing mass ratios to achieve uniform chain-level distribution at the molecular scale and uniform emission across the entire spectrum. That is, in step (4), the amount of polyvinylidene fluoride films with different degrees of π-conjugation added to the mixed solution increases progressively according to the decreasing concentration of the alkaline reagent.
[0012] Preferably, in step (5), the heat treatment temperature of the polyvinylidene fluoride film is 160~200℃, the heat treatment time is 6~8h, and the heating rate is 0.5~3℃ / min.
[0013] The polyvinylidene fluoride ferroelectric film is a poly(vinylidene fluoride-trifluoroethylene) ferroelectric film, a poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) ferroelectric film, or a poly(vinylidene fluoride-hexafluoropropylene) ferroelectric film.
[0014] The present invention also provides a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film prepared according to the above preparation method, which is based on the segment synergistic construction regulation, or a single-matrix photoinduced full-spectrum fluorescence emission polyvinylidene fluoride ferroelectric thin film.
[0015] Due to its controlled main chain rearrangement-conjugated main chain structure and the multi-conjugated scale segment combination achieved by the segment synergistic construction strategy, the single-matrix full-spectrum ferroelectric polymer thin film provided by this invention exhibits significant application potential in optoelectronic displays, biofluorescent labeling, flexible sensing, and ferroelectric storage. The material can achieve continuous ultra-wideband emission from ultraviolet to near-infrared light while maintaining ferroelectric properties, possessing both optical and electrical dual-functionality, providing a new material system for the design of opto-electronic integrated devices.
[0016] The construction method of this invention controls the degree of conjugation of the polyvinylidene fluoride backbone by precisely adjusting the amount of small-molecule alkaline reagent added, resulting in polymer segments forming π-conjugated structures of varying degrees. Subsequently, a segment synergistic construction strategy is used to remix segments with different degrees of conjugation in a preset ratio, ensuring uniform distribution of each segment in both solution and solid states. This establishes an energy distribution and emission channel spanning the entire visible light region within a single polymer system. The synergistic effect between segments with different degrees of conjugation allows the material to achieve ultra-broadband photoluminescence properties without introducing any external luminescent components, while preserving the crystal structure of the ferroelectric polymer itself.
[0017] The construction strategy provided by this invention is simple, uses a single component, operates under mild reaction conditions, and is easily scalable. The resulting polyvinylidene fluoride ferroelectric polymer film is uniform and transparent, exhibits stable full-spectrum emission characteristics, and maintains good ferroelectric behavior. This method avoids the problems of uneven dispersion of exogenous light-emitting units, poor biocompatibility, and degraded ferroelectric performance in traditional composite systems, providing a highly feasible technical route for constructing novel flexible optoelectronic functional materials. Attached Figure Description
[0018] Figure 1 The visible light fluorescence spectra of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1 are shown. Figure 2 Near-infrared fluorescence spectra of poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1; Figure 3 The UV-Vis absorption spectra of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric films prepared in Comparative Example 1 and Example 1 are shown. Figure 4 Fluorescence spectra in the visible light range for Comparative Examples 1-6; Figure 5 FTIR images of poly(vinylidene fluoride-trifluoroethylene) based ferroelectric films prepared in Comparative Examples 1, 5 and 3; Figure 6 CIE color coordinates (1931) of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1. Figure 7 Hysteresis loop diagrams of poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1. Detailed Implementation
[0019] The technical solution of the present invention will be further explained below with reference to specific embodiments.
[0020] Example 1 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take three portions of the uniform and transparent solution obtained in step (1), and add 0 g, 0.025 g and 0.1 g of methylamine solution respectively and stir for 48 h. That is, the mass concentration ratio of methylamine solution to poly(vinylidene fluoride-trifluoroethylene) powder is 0%, 5% and 20% respectively. (3) The solution obtained in step (2) was added dropwise to ethylene glycol, and after thorough mixing, it was filtered to obtain a solid suspension. The suspension was then dried at room temperature for 48 hours to remove the organic solvent and adhering aqueous phase. (4) The solid powders with treatment concentrations of 0%, 5% and 20% obtained in step (3) are mixed and dissolved in N,N-dimethylformamide in a ratio of 3:2:1 and stirred for 24 hours until completely dissolved to obtain a uniform transparent solution with yellow fluorescence. (5) The uniform solution obtained in step (4) is dropped onto a glass substrate, heated to 180℃ in a vacuum oven at 0.5℃ / min and dried for 6 hours, and then cooled to room temperature in the oven. The film is then peeled off from the substrate to obtain a poly(vinylidene fluoride-trifluoroethylene) based film with photoluminescence emission across the entire spectrum; Example 2 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take three portions of the uniform transparent solution obtained in step (1), and add 0, 0.015, and 0.125 g of methylamine solution respectively. Stir and react for 48 h. That is, the mass concentration ratio of methylamine solution to poly(vinylidene fluoride-trifluoroethylene) powder is 0%, 3%, and 25% respectively. (3) The solution obtained in step (2) was added dropwise to propylene glycol, and after thorough mixing, it was filtered to obtain a solid suspension. The suspension was then dried at room temperature for 48 hours to remove the organic solvent and adhering aqueous phase. (4) The solid powders with treatment concentrations of 0%, 3% and 25% obtained in step (3) are mixed and dissolved in N,N-dimethylformamide in a ratio of 4:3:1 and stirred for 24 hours until completely dissolved to obtain a uniform transparent solution with yellow fluorescence. (5) The uniform solution obtained in step (4) is dropped onto a glass substrate, heated to 160℃ in a vacuum oven at 1℃ / min and dried for 6 hours, and then cooled to room temperature in the oven. The film is then peeled off from the substrate to obtain a poly(vinylidene fluoride-trifluoroethylene) based film with photoluminescence emission across the entire spectrum; Example 3 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take three portions of the uniform transparent solution obtained in step (1), and add 0 g, 0.025 g, 0.05 g and 0.1 g of methylamine solution respectively and stir for 48 h. That is, the mass concentration ratio of methylamine solution to poly(vinylidene fluoride-trifluoroethylene) powder is 0%, 5%, 10% and 20% respectively. (3) The solution obtained in step (2) was added dropwise to propylene glycol, and after thorough mixing, it was filtered to obtain a solid suspension. The suspension was then dried at room temperature for 48 hours to remove the organic solvent and adhering aqueous phase. (4) The solid powders with treatment concentrations of 0%, 5%, 10% and 20% obtained in step (3) are mixed and dissolved in N,N-dimethylformamide in a ratio of 5:3:2:1 and stirred for 24 hours until completely dissolved to obtain a uniform transparent solution with yellow fluorescence. (5) The uniform solution obtained in step (4) is dropped onto a glass substrate, heated to 200℃ in a vacuum oven at 2℃ / min and dried for 6h, and then cooled to room temperature in the oven. The film is then peeled off from the substrate to obtain a poly(vinylidene fluoride-trifluoroethylene) based film with photoluminescence emission across the entire spectrum; Comparative Example 1 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) The uniform transparent solution obtained in step (1) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a transparent poly(vinylidene fluoride-trifluoroethylene) film. (3) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (2) to room temperature in the furnace and peel it off from the substrate.
[0021] Comparative Example 2 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take the uniform and transparent solution obtained in step (1) and add 0.025g of methylamine solution dropwise and stir for 48h. (3) The uniform transparent solution obtained in step (2) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a poly(vinylidene fluoride-trifluoroethylene) film with chain rearrangement. (4) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (3) to room temperature in the furnace and peel it off from the substrate.
[0022] Comparative Example 3 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take the uniform and transparent solution obtained in step (1) and add 0.05g of methylamine solution dropwise and stir for 48h. (3) The uniform transparent solution obtained in step (2) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a poly(vinylidene fluoride-trifluoroethylene) film with chain rearrangement. (4) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (3) to room temperature in the furnace and peel it off from the substrate.
[0023] Comparative Example 4 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take the uniform and transparent solution obtained in step (1) and add 0.075g of methylamine solution dropwise and stir for 48h. (3) The uniform transparent solution obtained in step (2) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a poly(vinylidene fluoride-trifluoroethylene) film with chain rearrangement. (4) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (3) to room temperature in the furnace and peel it off from the substrate.
[0024] Comparative Example 5 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take the uniform and transparent solution obtained in step (1) and add 0.1g of methylamine solution dropwise and stir for 48h. (3) The uniform transparent solution obtained in step (2) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a poly(vinylidene fluoride-trifluoroethylene) film with chain rearrangement. (4) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (3) to room temperature in the furnace and peel it off from the substrate.
[0025] Comparative Example 6 (1) Dissolve 0.5g of poly(vinylidene fluoride-trifluoroethylene) powder in 4.5g of N,N-dimethylformamide and stir continuously with a magnetic stir bar for 4h at room temperature until completely dissolved to obtain a uniform and transparent solution; (2) Take the uniform and transparent solution obtained in step (1) and add 0.125g of methylamine solution dropwise and stir for 48h. (3) The uniform transparent solution obtained in step (2) is dropped onto a glass substrate and dried at 180°C in a vacuum oven for 6 hours to remove N,N-dimethylformamide from the solution and obtain a poly(vinylidene fluoride-trifluoroethylene) film with chain rearrangement. (4) Cool the poly(vinylidene fluoride-trifluoroethylene) film obtained in step (3) to room temperature in the furnace and peel it off from the substrate.
[0026] Figure 1 The visible light fluorescence spectra of the poly(vinylidene fluoride-trifluoroethylene) ferroelectric thin films prepared in Comparative Example 1 and Example 1 are shown below. Figure 1 As can be seen, the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin film prepared in Example 1 has a wider and more continuous spectrum than that in Comparative Example 1, and its emission intensity has not decreased.
[0027] Figure 2 The near-infrared fluorescence spectra of the poly(vinylidene fluoride-trifluoroethylene) ferroelectric thin films prepared in Comparative Example 1 and Example 1 are shown below. Figure 2 As can be seen, the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric film prepared in Example 1 still emits fluorescence in the near-infrared up to 1000 nm, while Comparative Example 1 has almost no fluorescence emission at about 800 nm.
[0028] Figure 3 The UV-Vis absorption spectra of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1 are shown below. Figure 3 As can be seen from the results, the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric film prepared in Example 1 has a significantly improved absorption intensity compared with that of Comparative Example 1.
[0029] Figure 4To compare the fluorescence spectra of the poly(vinylidene fluoride-trifluoroethylene) ferroelectric thin films prepared in the visible light region and their corresponding emission peaks and peak intensities in Comparative Examples 1-6, from... Figure 4 As can be seen, with the increase of alkaline reagent concentration, its peak wavelength gradually redshifts and the emission intensity gradually decreases, which is a typical conjugate stacking characteristic.
[0030] Figure 5 The FTIR spectra of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Examples 1, 5, and 3 are shown below. Figure 5 As can be seen from the data, in Example 1 and Comparative Example 5, the distance between 1500-1700 cm⁻¹ is [missing information]. -1 It has a typical carbon-carbon double bond peak, while the untreated comparative sample does not have this characteristic peak.
[0031] Figure 6 The CIE color coordinates (1931) of the poly(vinylidene fluoride-trifluoroethylene) based ferroelectric thin films prepared in Comparative Example 1 and Example 1 are shown. After the above treatment, the color coordinates of Example 1 are located in the white light region.
[0032] Figure 7 The hysteresis loops of the poly(vinylidene fluoride-trifluoroethylene) ferroelectric thin films prepared in Comparative Example 1 and Example 1 show that the remanent polarization of Example 1 is almost unchanged, the coercive field is slightly increased, and the saturation polarization is slightly increased compared to Comparative Example 1.
Claims
1. A method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation, characterized in that, The preparation method includes the following steps: (1) Dissolve polyvinylidene fluoride ferroelectric polymer powder in an organic solvent and stir to obtain a transparent solution; (2) Take the transparent solution obtained in step (1) and divide it into at least three portions. One portion is kept in its original state to retain the original chain segment. The remaining portions are each added with different amounts of small molecule alkaline reagents. Under the action of alkaline medium, the polymer backbone undergoes structural rearrangement to different degrees, forming different Π conjugated structures, thereby obtaining at least three reaction solutions. (3) Drop at least three portions of the reaction solution obtained in step (2) into the aqueous phase, filter and dry the solids after precipitation to obtain polyvinylidene fluoride solids without conjugation degree and at least two portions of polyvinylidene fluoride solids with different Π conjugation degree. (4) The polyvinylidene fluoride solid obtained in step (3) without conjugation degree and at least two polyvinylidene fluoride solids with different Π conjugation degree are mixed and redissolved in an organic solvent and stirred to form a transparent solution with yellow fluorescence. (5) The transparent solution obtained in step (4) is dripped onto the substrate, dried to remove the organic solvent and subjected to heat treatment to prepare a polyvinylidene fluoride ferroelectric thin film that can achieve photoluminescent full-spectrum emission in a single polymer matrix.
2. The method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation according to claim 1, characterized in that, In step (1), 0.2–0.8 g of polyvinylidene fluoride ferroelectric polymer powder is dissolved in 4–5 g of N,N-dimethylformamide.
3. The method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation according to claim 1, characterized in that, The small molecule alkaline reagent added in step (2) is methylamine, and the amount added accounts for 3% to 25% of the mass of polyvinylidene fluoride polymer powder.
4. The method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation according to claim 1, characterized in that, In step (4), polyvinylidene fluoride solids with different degrees of Π conjugation and polyvinylidene fluoride solids without a degree of conjugation are mixed in a ratio that increases with the mass of the alkaline reagent treatment.
5. The method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation according to claim 1, characterized in that, In step (5), the heat treatment temperature is 160-200℃, the heat treatment time is 6-8h, and the heating rate is 0.5-3℃ / min.
6. The method for preparing a single-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation according to claim 1, characterized in that, The polyvinylidene fluoride ferroelectric polymer is poly(vinylidene fluoride-trifluoroethylene), polyvinylidene fluoride, poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene), or poly(vinylidene fluoride-hexafluoropropylene).
7. A monolithic full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film prepared by the preparation method according to any one of claims 1 to 6.
8. The application of the mono-matrix full-spectrum luminescent polyvinylidene fluoride ferroelectric thin film based on segment synergistic construction regulation as described in claim 7 in products for optoelectronic display, biosensing, energy harvesting or ferroelectric storage.