Methods for integrating electroluminescent devices on porous substrates, sunshades, and vehicles

Abstract

This invention discloses a method for integrating electroluminescent devices on a porous substrate, a sunshade, and a vehicle. The method includes: applying a polymer slurry medium to a porous substrate using a blade coating process to fill the pores in the porous substrate and form a smooth intermediate interface layer on its surface; and sequentially forming a bottom electrode layer, a dielectric layer, a light-emitting layer, and a top electrode layer of the electroluminescent device on the intermediate interface layer using at least one of a blade coating process, screen printing, or spraying process. This invention, by first applying a polymer slurry medium to the porous substrate using a blade coating process, effectively solves the technical challenge of integrating electroluminescent devices with porous substrates, enabling the fabrication of highly uniform electroluminescent devices resistant to repeated winding on flexible, porous substrates. The intermediate interface layer fills the pores in the porous substrate, improves the surface smoothness of the porous substrate, provides a stable and uniform electric field substrate for the electroluminescent device, and prevents the problem of unstable electrode layer resistance.

Description

Technical Field

[0001] This invention relates to the field of electroluminescent device technology, and more specifically to a method for integrating electroluminescent devices on a porous substrate, a sunshade, and a vehicle. Background Technology

[0002] With the development of technology, flexible electronic devices, due to their characteristics of being lightweight, thin, flexible, and wearable, have shown broad application prospects in fields such as display, lighting, and decoration. Electroluminescent devices, as an important type of light-emitting device, have advantages such as simple structure, low power consumption, wide viewing angle, and fast response speed. Combining them with porous substrates can form flexible light-emitting devices to meet the needs of various special application scenarios.

[0003] However, some problems and shortcomings still exist in the existing technology. First, there is a lack of a solution for directly fabricating highly uniform, resilient to repeated winding, and integrated electroluminescent devices on flexible, porous fabric substrates through coating / printing processes. Specifically, because the fabric itself is made of woven fibers, its rough, porous structure and tensile deformation directly lead to instability in the resistance of the device's electrode layer, causing device failure. Furthermore, the adhesion of existing electroluminescent devices to porous substrates is insufficient, making them prone to detachment or cracking during repeated bending or winding, affecting the device's lifespan and reliability. Simultaneously, exposed electroluminescent devices are susceptible to moisture intrusion, leading to increased electrode resistance and poor interfacial compatibility between layered structures, thus affecting the device's normal light-emitting performance. Summary of the Invention

[0004] The purpose of this invention is to provide a method for integrating electroluminescent devices on a porous substrate, a sunshade, and a vehicle, which solves the technical problem of combining electroluminescent devices with porous substrates and realizes the possibility of preparing highly uniform and resilient electroluminescent devices on flexible, porous substrates.

[0005] The above-mentioned objectives of this invention are mainly achieved by the following technical solutions: This invention provides a method for integrating an electroluminescent device on a porous substrate, the method comprising: A polymer slurry medium is applied to a porous substrate using a blade coating process to fill the pores in the porous substrate and form a smooth intermediate interface layer on the surface of the porous substrate. The bottom electrode layer, dielectric layer, light-emitting layer, and top electrode layer of the electroluminescent device are sequentially formed on the intermediate interface layer by at least one of the following processes: scraping, screen printing, or spraying.

[0006] According to one embodiment of the present invention, the coating process includes: The polymer slurry medium is poured onto the beginning of the porous substrate, and the polymer slurry medium is spread on the porous substrate at a certain speed using a scraper to form a continuous polymer slurry wet film layer. The porous substrate having the polymer slurry wet film layer is dried to form a smooth polymer undercoat.

[0007] According to one embodiment of the present invention, the drying temperature is 70°C to 90°C, and the drying time is 3 hours to 5 hours.

[0008] According to one embodiment of the present invention, the scraper is inclined at a certain angle to the porous substrate for scraping treatment, the angle being 60°~90°, and the moving speed of the scraper is 5mm / s~20mm / s.

[0009] According to one embodiment of the present invention, the spraying process includes: Using a spray gun with a muzzle diameter of 0.6mm to 1mm, spraying is performed at a distance of 10cm to 50cm from the polymer base coating to form the corresponding functional layer; Each of the functional layers is formed by at least two alternating spraying processes, and the functional layers formed after spraying are dried.

[0010] According to one embodiment of the present invention, the alternating spraying method includes: The first layer of the functional layer is sprayed in a first direction; A second layer of the functional layer is sprayed onto the first layer in a second direction, wherein the second direction is set at a certain angle to the first direction.

[0011] According to one embodiment of the present invention, the drying temperature is 70°C to 90°C and the drying time is 20 minutes to 30 minutes.

[0012] According to one embodiment of the present invention, the thickness of the polymer base coating is 20 μm to 40 μm.

[0013] According to one embodiment of the present invention, an encapsulation layer is formed on the top electrode layer by at least one of the scraping process, the screen printing process, or the spraying process.

[0014] According to one embodiment of the present invention, the porous substrate is activated by plasma or corona treatment before being subjected to a scraping process.

[0015] The present invention also provides a sunshade curtain, which is formed by integrating an electroluminescent device on a porous substrate as described above. The sunshade curtain includes a porous substrate, an intermediate interface layer, an electroluminescent device, and an encapsulation layer stacked sequentially, wherein an intermediate interface layer is formed between the electroluminescent device and the porous substrate by the coating process.

[0016] According to one embodiment of the present invention, the porous substrate is made of PET fiber cloth, the bottom electrode layer is made of silver nanowires, the dielectric layer is made of barium titanate, and the top electrode is made of a transparent conductive material.

[0017] The present invention also provides a vehicle including the sunshade as described above.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: 1. This invention effectively solves the technical problem of bonding electroluminescent devices with flexible porous substrates such as curtain fabrics by first coating a polymer slurry medium onto a porous substrate to form a smooth intermediate interface layer, thereby realizing the preparation of highly uniform electroluminescent devices that can withstand repeated winding on flexible, porous curtain fabric substrates. 2. The intermediate interface layer of the present invention effectively fills the voids in the porous substrate, improves the surface flatness of the porous substrate, provides a stable and uniform electric field substrate for electroluminescent devices, and prevents the problem of unstable electrode layer resistance value of electroluminescent devices. 3. This invention uses flexible conductive materials such as silver nanowires as the bottom electrode layer and the top electrode layer, so that the device can maintain the integrity of the conductive network structure under repeated bending conditions, which meets the application requirements of frequent rolling and retraction of sunshade curtains; 4. The encapsulation coating of the present invention effectively isolates the device from external environmental factors such as moisture, oxygen, and dust, thereby improving the chemical stability and service life of the device. 5. The method of the present invention can design various patterns according to needs, providing a personalized visual experience for automotive interiors and enhancing product added value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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. In the drawings: Figure 1 This is a flowchart of the method for integrating electroluminescent devices on a porous substrate according to the present invention.

[0020] Figure 2This is a schematic diagram of the structure of the sunshade curtain of the present invention.

[0021] Figure 3 This is a schematic diagram of the application of an intermediate interface layer on a porous substrate using a scraper, according to the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the sunshade curtain of the present invention, which has an encapsulation layer on its surface.

[0023] Explanation of icon numbers: 1. Porous substrate; 11. Start point; 2. Intermediate interface layer; 2'. Polymer slurry wet film layer; 3. Electroluminescent device; 31. Bottom electrode layer; 32. Dielectric layer; 33. Light-emitting layer; 34. Top electrode layer; 4. Scraper; 5. Encapsulation layer; h, gap; H, thickness; F1, direction Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Implementation Method 1

[0028] like Figure 1 and Figure 2 As shown, the present invention provides a method for integrating an electroluminescent device on a porous substrate, the method comprising the following steps: Step S1: Apply the polymer slurry medium to the porous substrate 1 by a blade coating process to fill the pores in the porous substrate 1 and form a smooth intermediate interface layer 2 on the surface of the porous substrate 1.

[0029] Step S2: The bottom electrode layer 31, dielectric layer 32, light-emitting layer 33, and top electrode layer 34 of the electroluminescent device 3 are sequentially formed on the intermediate interface layer 2 by at least one of the scraping process, screen printing, or spraying process.

[0030] The method for integrating electroluminescent devices on a porous substrate of the present invention first applies a polymer slurry medium to the porous substrate 1 through a scraping process to form a smooth intermediate interface layer 2. This effectively solves the technical problem of bonding the electroluminescent device 3 with porous substrate materials such as curtain fabric, and realizes the possibility of preparing highly uniform electroluminescent devices that can withstand repeated winding on flexible, porous substrates. In addition, the formed intermediate interface layer 2 effectively fills the pores in the porous substrate 1 and improves the surface smoothness of the porous substrate 1, providing a stable and uniform electric field substrate for the electroluminescent device 3 and preventing the problem of unstable electrode layer resistance value of the electroluminescent device 3.

[0031] Specifically, the polymer slurry medium is an aqueous polyurethane slurry, and the porous substrate 1 can be a curtain made of PET material (e.g., polyester material).

[0032] In step S1, as Figure 3 As shown, the coating process includes: first, uniformly pouring the polymer slurry medium onto the beginning 11 of the porous substrate 1, and using a scraper 4 to spread the polymer slurry medium onto the porous substrate 1 at a certain speed to form a continuous polymer slurry wet film layer 2'; then, drying the porous substrate 1 with the polymer slurry wet film layer 2' to form a smooth intermediate interface layer 2.

[0033] In this embodiment, the porous substrate 1 is first fixed flat on the coating platform. The gap h between the doctor blade 4 and the porous substrate 1 is adjusted, for example, the gap h can be 50μm~100μm. Then, the doctor blade 4 is tilted at a certain angle θ (for example, the angle θ is 60° to 90°) on the surface of the porous substrate 1. From the beginning 11 of the porous substrate 1, the polymer slurry medium is evenly spread and filled into the micropores between the fibers in the porous substrate 1 under the action of the doctor blade 4, and a continuous polymer slurry wet film layer 2' is formed on the surface of the porous substrate 1. In this invention, the moving speed of the doctor blade 4 is a constant speed, which can be 5mm / s to 20mm / s.

[0034] Furthermore, the porous substrate 1 with the polymer slurry wet film layer 2' is placed in an oven and dried at a temperature of 70℃~90℃ for 3 to 5 hours to fully cure the water-based polymer slurry medium, so as to form a smooth intermediate interface layer 2 with a thickness H of 20μm to 40μm.

[0035] The polymer slurry medium of this invention fills the gaps between the fibers of the fabric through capillary wetting, effectively improving the smoothness of the porous substrate 1 surface and reducing microscopic defects during the subsequent coating of the functional layers of the electroluminescent device 3. In practical applications, the coating cross-section can be observed using an optical microscope or scanning electron microscope to confirm the absence of visible gaps, thereby determining whether the intermediate interface layer 2 has sufficiently filled the fiber gaps.

[0036] According to one embodiment of the present invention, before the scraping process, i.e. before step S1, the porous substrate 1 is activated by plasma or corona treatment to enhance the bonding force between the porous substrate 1 and the polymer slurry medium.

[0037] In step S2, the bottom electrode layer 31, dielectric layer 32, light-emitting layer 33, and top electrode layer 34 of the electroluminescent device 3 are sequentially formed on the intermediate interface layer 2 by at least one of the following processes: scraping, screen printing, or spraying.

[0038] Specifically, in an optional embodiment, when the electroluminescent device 3 is formed by a spraying process, the spraying process includes: using a spray gun with a nozzle diameter of 0.6 mm to 1 mm, spraying at a distance of 10 cm to 50 cm from the intermediate interface layer 2 to form the corresponding functional layer. At the same time, each functional layer can be formed by at least two alternating spraying processes, and then the functional layers formed after spraying are dried.

[0039] In this embodiment, the use of a spray gun nozzle with a diameter of 0.6 mm to 1 mm is primarily based on the following considerations: If the nozzle diameter is too small (e.g., <0.6 mm), the nozzle is prone to clogging due to the aggregation of solid particles (e.g., barium titanate, zinc sulfide powder) in the polymer slurry medium, affecting the continuity of spraying and the uniformity of the coating; if the nozzle diameter is too large (e.g., >1.0 mm), the atomization effect decreases, easily leading to droplet splashing or uneven coating thickness, making it difficult to achieve precise control of thin layers. The present invention selects a spray gun nozzle within this diameter range to ensure smooth spraying while also considering the uniformity and controllable thickness of the coating.

[0040] Furthermore, the alternating spraying method includes: spraying a first layer of the functional layer in a first direction; and spraying a second layer of the functional layer on the first layer in a second direction, wherein the second direction is set at a certain angle to the first direction.

[0041] Specifically, the spraying method employs alternating horizontal and vertical spraying. That is, the first layer of a functional layer (e.g., bottom electrode layer 31, dielectric layer 32, light-emitting layer 33, or top electrode layer 34) is sprayed once along the length of the porous substrate 1. Then, the second layer of the same functional layer is sprayed once along the width of the porous substrate 1. Finally, the third layer of the same functional layer is sprayed again along the length of the porous substrate 1, for a total of three times. Alternatively, in other embodiments, the first and second directions can be sprayed at a certain angle (e.g., 45° and 135°). In other words, the first layer of a functional layer is sprayed once along the length of the porous substrate 1, and the second layer is sprayed once at a 45° angle to the length of the porous substrate 1, to achieve better coating uniformity.

[0042] In addition, after each layer of a functional layer is applied, it must be placed in an oven at 70℃~90℃ for 20~30 minutes to dry completely to remove the solvent before the next layer of the functional layer can be applied.

[0043] In other feasible embodiments, a scraping process or a screen printing process can also be used. Scraping is suitable for coating large, flat surfaces and can quickly form a uniform coating; while screen printing is suitable for the precise preparation of patterned coatings.

[0044] Finally, as Figure 4 As shown, an encapsulation layer 5 is formed on the top electrode layer 34 using at least one of the following processes: blade coating, screen printing, or spray coating, to protect the electroluminescent device 3 from environmental factors. Electroluminescent devices prepared by this method exhibit good flexibility and luminous uniformity. The encapsulation layer 5 is made of polyacrylate, which has high chemical stability and can effectively resist hydrolysis reactions.

[0045] In this invention, the bottom electrode layer 31 of the electroluminescent device 3 is made of silver nanowires. As a one-dimensional conductive material, silver nanowires have excellent conductivity (sheet resistance less than 100 Ω / sq, or even lower) and good flexibility (due to their high aspect ratio at the nanoscale, they are not prone to brittle fracture under bending conditions), and can withstand multiple bends. The bottom electrode layer 31 composed of silver nanowires can maintain the integrity of the conductive network structure under repeated bending conditions, thereby enabling the device to have excellent bending resistance and meet the application requirements of frequent rolling up and down of sunshades.

[0046] The dielectric layer 32 is made of barium titanate, which effectively separates the upper and lower electrode layers (i.e., the bottom electrode layer 31 and the top electrode layer 34) to prevent them from directly contacting each other and short-circuiting. In addition, the dielectric layer 32 can also store charge, which helps to stabilize and maintain the electric field applied to the luminescent powder, especially when the alternating current changes periodically, thus ensuring the stability of luminescence.

[0047] The light-emitting layer 33 uses zinc sulfide and its doping system, which can directly convert electrical energy into visible light.

[0048] The top electrode layer 34 uses PEDOT:PSS transparent conductive material, which maintains good conductivity without affecting the light emission effect. It possesses excellent conductivity while also having a certain degree of transparency, ensuring no impact on the light emission effect, and its flexibility also meets the requirements of sunshade curtains.

[0049] In this embodiment, the top electrode layer 34 is made of an inherently flexible transparent conductive material. Preferably, PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate) conductive polymer can be used, which has good conductivity and high light transmittance (e.g., light transmittance ≥85%), and will not significantly affect the light emission efficiency of the light-emitting layer 33; and due to the inherent flexibility of the polymer, it can meet the application requirements of repeated bending of the sunshade curtain.

[0050] Of course, the material of the top electrode layer 34 can also be selected from the following alternatives. For example, the top electrode layer 34 can be made of silver nanowires, which have excellent conductivity, high light transmittance and good flexibility, and can be formed into a film by printing or coating. Alternatively, the top electrode layer 34 can be made of metal mesh, or a mesh transparent electrode made of metal materials such as copper or silver, which has excellent conductivity and is suitable for large-size devices. When the top electrode layer 34 is made of carbon nanotubes or graphene film, it has intrinsic flexibility and good chemical stability, and is suitable for long-term use.

[0051] Implementation Method 2

[0052] This embodiment provides a sunshade curtain, which is formed using the method of integrating electroluminescent devices on a porous substrate as described in Embodiment 1. The specific steps, principles, and beneficial effects of the method for integrating electroluminescent devices 3 on a porous substrate 1 have been described in detail in Embodiment 1, and will not be repeated here.

[0053] The sunshade includes a porous substrate 1, an intermediate interface layer 2, an electroluminescent device 3, and an encapsulation layer 5 stacked in sequence, wherein the intermediate interface layer 2 is formed between the electroluminescent device 3 and the porous substrate 1 through the aforementioned coating process.

[0054] In this embodiment, the porous substrate 1 is made of PET fiber cloth, the bottom electrode layer 31 is made of silver nanowires, the dielectric layer 32 is made of barium titanate, and the top electrode layer 34 is made of transparent conductive material.

[0055] The preparation method of this sunshade is basically the same as that described in Embodiment 1. First, an aqueous polyurethane slurry is applied to a PET fiber cloth using a scraping process to form an intermediate interface layer 2. This intermediate interface layer 2 fills the pores in the PET fiber cloth and forms a smooth intermediate interface layer 2 on the surface of the PET fiber cloth. Then, the bottom electrode layer 31, dielectric layer 32, light-emitting layer 33, and top electrode layer 34 of the electroluminescent device 3 are sequentially formed on the intermediate interface layer 2. Finally, an encapsulation layer 5 is formed on the top electrode layer 34.

[0056] In a preferred embodiment, the bottom electrode layer 31 is made of silver nanowires, which have excellent conductivity and good flexibility, can withstand multiple bends, and are suitable for use in sunshades that require frequent rolling up and down. The dielectric layer 32 is made of barium titanate, which can effectively separate the upper and lower electrodes, prevent short circuits, and stabilize the electric field. The top electrode layer 34 is made of a transparent conductive material, which maintains good conductivity without affecting the light emission effect. The encapsulation layer 5 protects the entire device from environmental factors that could damage the electroluminescent device.

[0057] The sunshade curtains prepared by this method have good flexibility and uniform light emission, and can provide lighting effects while ensuring the sunshade function, thus enhancing the practicality and aesthetics of the sunshade curtains.

[0058] In an extended example, the sunshade can be composed of a porous substrate 1, an intermediate interface layer 2, an electroluminescent device 3, an encapsulation layer 5, and the porous substrate 1 stacked sequentially. That is, the electroluminescent device 3 is integrated between two layers of sunshade fabric.

[0059] This electroluminescent device can be designed into various cartoon patterns, brand logos, or customized graphics according to customer needs. Through collaborations with car manufacturers and IPs, personalized co-branded car glass can be achieved, bringing passengers a rich emotional experience and differentiated visual enjoyment, thereby enhancing the added value of the product.

[0060] Implementation Method 3

[0061] The present invention also provides a vehicle that includes a sunshade. This sunshade is the same as the sunshade described in Embodiment 2, and its structure and beneficial effects have been described in detail in Embodiment 2, and will not be repeated here.

[0062] The vehicle's sunshade comprises a porous substrate 1, an intermediate interface layer 2, an electroluminescent device 3, and an encapsulation layer 5, which are stacked sequentially. The intermediate interface layer 2 is formed between the electroluminescent device 3 and the porous substrate 1 through a coating process. The porous substrate 1 is made of PET fiber cloth, the bottom electrode layer 31 is made of silver nanowires, the dielectric layer 32 is made of barium titanate, and the top electrode layer 34 is made of a transparent conductive material.

[0063] The vehicle's sunshade is installed at the sunroof location on the roof and can be unfolded or retracted as needed. When unfolded, the sunshade effectively blocks direct sunlight and, by connecting to the vehicle's power system, activates electroluminescent devices to generate soft light, providing uniform illumination inside the vehicle.

[0064] In a preferred embodiment, the vehicle is equipped with a control system that allows adjustment of the brightness and illumination mode of the sunshade via an in-vehicle control panel or a remote smart terminal. The control system is connected to the vehicle's light sensor and can automatically adjust the operating status of the luminous sunshade based on ambient light intensity, achieving intelligent control.

[0065] While maintaining its traditional sunshade function, the vehicle's sunshade offers a new option for interior lighting through electroluminescent technology, enhancing not only the vehicle's practicality but also the comfort and aesthetics of the interior environment. Thanks to the flexible electroluminescent technology, the sunshade maintains a stable lighting effect even when encountering vibrations and bumps during vehicle operation, and will not be damaged by mechanical stress.

[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for integrating electroluminescent devices on a porous substrate, characterized in that, The method includes: A polymer slurry medium is applied to a porous substrate using a blade coating process to fill the pores in the porous substrate and form a smooth intermediate interface layer on the surface of the porous substrate. The bottom electrode layer, dielectric layer, light-emitting layer, and top electrode layer of the electroluminescent device are sequentially formed on the intermediate interface layer by at least one of the following processes: scraping, screen printing, or spraying.

2. The method for integrating an electroluminescent device on a porous substrate as described in claim 1, characterized in that, The coating process includes: The polymer slurry medium is poured onto the beginning of the porous substrate, and the polymer slurry medium is spread on the porous substrate at a certain speed using a scraper to form a continuous polymer slurry wet film layer. The porous substrate having the polymer slurry wet film layer is dried to form a smooth polymer undercoat.

3. The method for integrating an electroluminescent device on a porous substrate as described in claim 2, characterized in that, The drying temperature is 70℃~90℃, and the drying time is 3 hours~5 hours.

4. The method for integrating an electroluminescent device on a porous substrate as described in claim 2 or 3, characterized in that, The scraper is tilted at a certain angle to the porous substrate for coating, the angle being 60°~90°, and the scraper's moving speed is 5mm / s~20mm / s.

5. The method for integrating an electroluminescent device on a porous substrate as described in claim 1, characterized in that, The spraying process includes: Using a spray gun with a muzzle diameter of 0.6mm to 1mm, spraying is performed at a distance of 10cm to 50cm from the polymer base coating to form the corresponding functional layer; Each of the functional layers is formed by at least two alternating spraying processes, and the functional layers formed after spraying are dried.

6. The method for integrating an electroluminescent device on a porous substrate as described in claim 5, characterized in that, The alternating spraying method includes: The first layer of the functional layer is sprayed in a first direction; A second layer of the functional layer is sprayed onto the first layer in a second direction, wherein the second direction is set at a certain angle to the first direction.

7. The method for integrating an electroluminescent device on a porous substrate as described in claim 5 or 6, characterized in that, The drying process is carried out at a temperature of 70℃ to 90℃ for 20 to 30 minutes.

8. The method for integrating an electroluminescent device on a porous substrate as described in claim 2, characterized in that, The thickness of the polymer undercoat is 20μm~40μm.

9. The method for integrating an electroluminescent device on a porous substrate as described in claim 1, characterized in that, An encapsulation layer is formed on the top electrode layer by at least one of the following processes: scraping, screen printing, or spraying.

10. The method for integrating an electroluminescent device on a porous substrate as described in claim 1, characterized in that, Before the porous substrate is subjected to a scraping process, it is activated by plasma or corona treatment.

11. A sunshade curtain, characterized in that, The sunshade curtain is formed by integrating an electroluminescent device on a porous substrate as described in any one of claims 1 to 10. The sunshade curtain includes a porous substrate, an intermediate interface layer, an electroluminescent device, and an encapsulation layer stacked sequentially, wherein an intermediate interface layer is formed between the electroluminescent device and the porous substrate by the coating process.

12. The sunshade curtain as described in claim 11, characterized in that, The porous substrate is made of PET fiber cloth, the bottom electrode layer is made of silver nanowires, the dielectric layer is made of barium titanate, and the top electrode is made of a transparent conductive material.

13. A vehicle, characterized in that, Includes the sunshade curtain as described in claim 11 or 12.

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