Stretchable alternating current electroluminescent device based on PEDOT: PSS / ionic gel

Abstract

The invention discloses a stretchable alternating current electroluminescent device based on PEDOT: PSS (Poly (3, 4-ethylenedioxythiophene): PSS / ionic gel. The main body structure of the device comprises a flexible stretchable light-emitting layer, a flexible stretchable electrode and a flexible stretchable packaging layer. The device is of a sandwich type structure, the flexible light-emitting layer is located in an interlayer wrapped by the upper ionic gel layer and the lower ionic gel layer, the PEDOT: PSS layers are sprayed on the outer surfaces of the upper ionic gel layer and the lower ionic gel layer respectively, silver paste is coated on the PEDOT: PSS layers to serve as wire interfaces, and external wires are led out from the wire interfaces. The flexible stretchable light-emitting layer is composed of a flexible substrate, light-emitting powder and nano ceramic particle barium titanate for enhancing the light-emitting intensity, and the flexible stretchable electrode is mainly composed of an ionic gel film and PEDOT: PSS. The stretchable electrode provided by the invention maintains stable conductivity under high stretch rate, and the stretchable alternating current electroluminescent device prepared on the basis has the advantages of stable luminescence, high luminance and the like.

Description

Technical Field

[0001] The present invention relates to a flexible light-emitting device in the field of flexible sensing, and in particular to a stretchable alternating current electroluminescent device based on PEDOT:PSS (poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate)) / ion gel. Background Art

[0002] Light-emitting devices are an indispensable part of modern life and are widely used in electronic devices such as mobile phones, computers, televisions, and electronic billboards. However, most light-emitting display technologies are based on indium tin oxide (ITO) glass. As wearable device technology continues to mature, its rigid properties are gradually becoming unsuitable for more application scenarios. Therefore, the importance of flexible light-emitting devices is gaining more and more attention. However, the current research on flexible light-emitting devices generally has a stretching rate of around 30%, which still has great limitations in application scenarios that require large strain. Flexible alternating current electroluminescent (ACEL) devices have extremely high deformation adaptability and can operate in a stretched, bent, folded, or even twisted state. Compared with light-emitting diodes, ACEL has a simpler manufacturing process and lower cost. Although the brightness is usually not as good as that of light-emitting diodes, it is sufficient to meet display needs in indoor environments.

[0003] Existing flexible AC electroluminescent devices usually have good bending properties, but it is difficult to maintain uniform and stable luminescence under large stretching. In order to improve the stretchability of such devices, two methods are usually used: changing the electrode material or redesigning the structure. Enhancing stretchability through structural optimization will increase manufacturing complexity and cost, and may reduce the stability of luminescence. On the other hand, trying to use electrode materials with good stretchability is also challenging, because most high-transparency electrode materials often cannot take into account good conductivity when stretched significantly. This may lead to a decrease in electrode conductivity or even breakage, which significantly affects the luminescence effect. Therefore, it is still challenging to achieve flexible AC electroluminescent devices that have both good luminescence and high stretchability. Summary of the invention

[0004] In order to solve the problem of stable and uniform light emission of AC electroluminescent devices under high stretching conditions, the present invention proposes a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel, which has an electrode structure with excellent stretchability, good conductivity and high transparency, simplifies the manufacturing process of stretchable AC electroluminescent devices, and ensures that the manufacturing materials are non-toxic and harmless. These technologies have the potential to be widely used in wearable health monitoring systems and electronic textiles.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] 1. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel

[0007] The device includes a flexible stretchable electrode, a packaging layer, a flexible stretchable light-emitting layer, a wire interface and an external wire. Corresponding flexible stretchable electrodes are laid on the upper and lower parts of the flexible stretchable light-emitting layer, respectively. The flexible stretchable electrode is connected to the external wire through the wire interface. The flexible stretchable light-emitting layer, the upper and lower layers of flexible stretchable electrodes and the wire interface form a flexible light-emitting electrode body. The flexible light-emitting electrode body is packaged in the packaging layer, and the end of the external wire is arranged outside the packaging layer. The flexible stretchable electrode is composed of a PEDOT:PSS layer and an ion gel layer, and the ion gel layer is arranged close to the flexible stretchable light-emitting layer.

[0008] The flexible stretchable light-emitting layer comprises light-emitting powder, nano-ceramic particle barium titanate and a light-emitting layer flexible substrate, wherein the light-emitting powder and the nano-ceramic particle barium titanate are doped in the light-emitting layer flexible substrate in a mass ratio of (1:1)-(2:1).

[0009] The ion gel layer comprises dimethylacetamide:thermoplastic polyurethane elastomer:ionic liquid in a mass ratio of (5-8):1:(0.5-2).

[0010] The wire interface is placed on the PEDOT:PSS layer, and the surface of the wire interface is coated with silver paste.

[0011] The packaging layer is made of flexible material.

[0012] 2. A method for preparing a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel

[0013] Step 1: After uniformly mixing and stirring the A and B components of the luminescent layer matrix material, the luminescent powder, and the nano-ceramic particle barium titanate, a viscous solution of a flexible and stretchable luminescent layer is obtained, the viscous solution is placed in a vacuum box, and the viscous solution is evacuated under a negative pressure environment until no bubbles overflow from the viscous solution;

[0014] Step 2: Apply the bubble-free viscous solution in step 1 to the surface to be deposited, and attach the mask to the surface to be deposited by scraping, so as to achieve the deposition of a flexible and stretchable light-emitting layer with controllable thickness and shape, and obtain the flexible and stretchable light-emitting layer after heating and curing;

[0015] Step 3: Add DMAC as a solvent into the container, then slowly add TPU and ionic liquid; stir to form a uniform ion gel solution, evenly spin-coat the ion gel solution on the surface of the flexible stretchable light-emitting layer after plasma surface modification, heat and cure to form an ion gel layer;

[0016] Step 4: evenly spin-coating a PEDOT:PSS solution on the surface of the flexible stretchable ion gel electrode layer, and after heating, the solvent in the solution evaporates to form a uniform PEDOT:PSS layer on the surface of the flexible stretchable ion gel electrode layer;

[0017] Step 5: After burning off the outer paint at the end of the enameled wire, fix it on the PEDOT:PSS layer, evenly apply silver paste so that the silver paste contacts the PEDOT:PSS layer and the end of the enameled wire at the same time, and then heat and cure it so that the enameled wire is bonded to the cured PEDOT:PSS layer through the silver paste to serve as an external lead;

[0018] Step 6: Mix the A and B components of the light-emitting layer matrix material in a mass ratio of 1:1, apply them evenly on the outside of the PEDOT:PSS layer, heat and cure, and form an encapsulation layer after curing.

[0019] The beneficial effects of the present invention are:

[0020] The present invention utilizes the superior stretchability of the ion gel electrode and the high conductivity of the PEDOT:PSS material to design an electrode that is stably conductive under high stretching conditions, and applies it to a stretchable AC electroluminescent device. By combining a high-stretching rate TPU-based ion gel and a highly conductive PEDOT:PSS, anions and cations can migrate in the TPU matrix and PEDOT:PSS, thereby effectively combining the high stretchability of the TPU-based ion gel and the high conductivity of PEDOT:PSS, so that the entire electrode still has conductivity under a higher stretching rate. Through a dynamic cyclic stretching performance test, the electrode can maintain stable conductivity in a cyclic test of a tensile strain of 0-100%, and the repeatability of the electrode conductivity is high; the electrode can still maintain stable conductivity in a cyclic test of a tensile strain of 0-280%, and no obvious attenuation occurs. In summary, the electrode can ensure stable conductivity under dynamic large strain stretching conditions. By applying this electrode to the preparation of an inorganic AC electroluminescent device, it can be ensured that while maintaining conductivity, good stretching properties and high transparency are obtained. After plasma surface modification, this electrode can be evenly deposited on the surface of the light-emitting layer, and can still fit closely to the light-emitting layer under high tensile strain conditions, which helps to improve the overall luminescence stability of the flexible AC electroluminescent device. In addition, since the electrode preparation process is relatively simple and requires less materials, it has practical application significance.

[0021] By utilizing the superior stretchability of the ion gel electrode and the high conductivity of the PEDOT:PSS material, the present invention allows the manufacture of a larger area of ​​a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel, and ensures stable stretchability and luminescence effect. Users can flexibly adjust the size of the stretchable AC electroluminescent device according to actual usage, and it has a wider range of applications.

[0022] The stretchable and highly conductive electrode designed by the present invention does not contain any chemical substances harmful to the human body, and has the characteristics and possibilities of being widely used in the fields of biosensing and detection, etc. Moreover, the electrode is non-polluting to the environment, showing excellent environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the layered structure of a stretchable AC electroluminescent device based on ion gel / PEDOT:PSS according to the present invention;

[0024] Figure 2 is a schematic diagram of a flexible stretchable electrode of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal components of the flexible stretchable light-emitting layer of the present invention;

[0026] Figure 4 This is a dynamic cycle test diagram of the flexible stretchable electrode of the present invention under 0-100% strain;

[0027] Figure 5 This is a dynamic cycle test diagram of the flexible stretchable electrode of the present invention under 0-280% strain;

[0028] In the figure: flexible stretchable electrode 1, packaging layer 2, flexible stretchable light-emitting layer 3, external wire 4, wire interface 5, PEDOT:PSS layer 11, ion gel layer 12, luminescent powder 31, light-emitting layer flexible substrate 32, nano-ceramic particle barium titanate 33. DETAILED DESCRIPTION

[0029] The present invention provides a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel and a preparation method thereof. To make the technical solution effect of the present invention clearer, the present invention is further described in detail below. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] like Figure 1As shown, the stretchable electroluminescent device adopts a sandwich-type symmetrical structure, specifically including a flexible stretchable electrode 1, an encapsulation layer 2, a flexible stretchable light-emitting layer 3, a wire interface 5 and an external wire 4. The upper and lower parts of the flexible stretchable light-emitting layer 3 are respectively provided with corresponding flexible stretchable electrodes 1, and the flexible stretchable electrode 1 is connected to the external wire 4 through the wire interface 5. Specifically, each flexible stretchable electrode (1) is connected to the external wire 4 through a corresponding wire interface 5. The flexible light-emitting electrode body is composed of the flexible stretchable light-emitting layer 3, the upper and lower layers of the flexible stretchable electrodes 1 and the wire interface 5. The flexible light-emitting electrode body is encapsulated in the encapsulation layer 2, and the end of the external wire 4 is arranged to pass through the encapsulation layer 2. The external wire 4 is used to connect to a power supply; wherein, as Figure 2 As shown, the flexible stretchable electrode 1 is composed of a PEDOT:PSS layer 11 and an ion gel layer 12, the ion gel layer 12 is arranged close to the flexible stretchable light-emitting layer 3, the wire interface 5 is placed on the PEDOT:PSS layer 11, and the surface of the wire interface 5 is coated with silver paste. That is, the stretchable AC electroluminescent device is centered on the flexible stretchable light-emitting layer 3, and is symmetrically arranged on both sides. From the flexible stretchable light-emitting layer 3 to both sides, there are ion gel layer 12, PEDOT:PSS layer 11, and encapsulation layer 2. Except for the flexible stretchable light-emitting layer 3, the rest of the structure is transparent and has a high light transmittance. Each layer is tightly combined with its adjacent layer, and can still maintain a state of mutual adhesion when the stretching amount is relatively large.

[0031] like Figure 3 As shown, the flexible stretchable light-emitting layer 3 includes a light-emitting powder 31, a nano-ceramic particle barium titanate 33 and a light-emitting layer flexible substrate 32. The light-emitting layer flexible substrate 32 is a flexible stretchable substrate, and the light-emitting powder 31 and the high dielectric nano-ceramic particle barium titanate 33 are doped in the light-emitting layer flexible substrate 32 in a mass ratio of (1:1)-(2:1). The high dielectric nano-ceramic particle barium titanate 33 for enhancing the luminous intensity is filled in the gaps between the light-emitting powders 31 with larger particle diameters, thereby increasing the density of the flexible stretchable light-emitting layer 3 and thus improving the luminous intensity.

[0032] The ion gel layer 12 includes dimethylacetamide DMAC: thermoplastic polyurethane elastomer TPU: ionic liquid [EMIM] [TFSI] in a mass ratio of (5-8): 1: (0.5-2). After the ionic liquid is doped into the flexible substrate TPU, the ion gel layer 12 has stretchability. The ion gel layer 12 contains freely movable ions and has ionic conductivity. The polymer properties of the substrate material TPU give the ion gel layer high stretchability.

[0033] The encapsulation layer 2 is made of a flexible material with a low elastic modulus and has excellent stretchability.

[0034] This embodiment overcomes the problem of insufficient conductivity of the ion electrode due to ionic conduction by combining the high-conductivity PEDOT:PSS layer 11 with the high-stretchability ion gel layer 12. While ensuring high stretchability, a high-conductivity flexible stretchable electrode 1 is obtained.

[0035] In this embodiment, a glass slide sprayed with a release agent is used as the surface to be deposited, and an insulating tape of a certain thickness is used as a mask, and deposition of a flexible and stretchable light-emitting layer with controllable thickness and shape is achieved by scraping.

[0036] In addition, this embodiment can adjust the luminous brightness by adjusting the ratio of the luminous material to the luminous intensity enhancing material. Within a certain range, as the ratio of the luminous material to the luminous intensity enhancing material increases, the density of the flexible stretchable luminous layer 3 increases and the luminous intensity increases.

[0037] In this embodiment, the change of luminescent color can be achieved by changing the metal substance contained in the luminescent material. For example, the blue electroluminescent material is ZnS doped with Cu (ZnS:Cu), the orange electroluminescent material is ZnS doped with Mn (ZnS:Mn), and the green electroluminescent material is ZnS doped with Tb (ZnS:Tb).

[0038] In one embodiment, the method for preparing the stretchable AC electroluminescent device based on PEDOT:PSS / ion gel comprises the steps of:

[0039] Step 1: The A and B components of the luminescent layer matrix material Ecoflex 00-31, the luminescent powder 31, and the nano-ceramic particle barium titanate 33 for enhancing the luminescent intensity are uniformly mixed in a mass ratio of 2:2:2:1, and after uniform stirring, a viscous solution of the flexible and stretchable luminescent layer 3 is obtained, and the viscous solution is placed in a vacuum box, and the viscous solution is evacuated for three minutes under a negative pressure environment of -0.1 MPa until no bubbles overflow from the viscous solution;

[0040] Step 2: Apply the viscous solution described in step 1 on the surface to be deposited, and use a scraping method to attach a mask of a specific shape and thickness to the surface to be deposited to achieve the deposition of a flexible and stretchable light-emitting layer with controllable thickness and shape, and heat and cure at 90 degrees Celsius for 15 minutes to obtain a flexible and stretchable light-emitting layer 3;

[0041] Step 3: Add DMAC as a solvent to a beaker, then slowly add TPU and ionic liquid ([EMIM][TFSI]), the mass ratio of the three being 6:1:1; stir on a magnetic stirrer for 8 hours to form a uniform ion gel solution, the ion gel solution is evenly spin-coated on the surface of the flexible stretchable light-emitting layer 3 after plasma surface modification, and solidified after heating at 80 degrees Celsius for 12 hours to form an ion gel layer 12;

[0042] Step 4: evenly spin-coating a PEDOT:PSS solution on the surface of the flexible stretchable ion gel electrode layer, and heating at 110 degrees Celsius for 30 minutes, so that the solvent in the solution evaporates, and a uniform PEDOT:PSS layer 11 is formed on the surface of the flexible stretchable ion gel electrode layer;

[0043] Step 5: Burn off the outer paint at the end of the enameled wire and fix it on the PEDOT:PSS layer. Apply a small amount of silver paste evenly, so that the silver paste contacts the PEDOT:PSS layer and the end of the enameled wire at the same time, and then heat and cure it at 110 degrees Celsius for 1 hour, so that the enameled wire is bonded to the cured PEDOT:PSS layer through the silver paste, as an external lead;

[0044] Step 6: Mix the A and B components of the light-emitting layer matrix material Ecoflex 00-31 in a mass ratio of 1:1, apply them evenly on the outside of the PEDOT:PSS layer, heat and cure at 80 degrees Celsius for 10 minutes, and form an encapsulation layer 2 after curing.

[0045] Furthermore, the viscous solution containing the luminescent material and the luminescent intensity enhancing material in step 1 is prepared by mixing the luminescent powder 31 and the nano-ceramic particle barium titanate 33 in a mass ratio of 2:1 into a polymer substrate. The polymer substrate includes but is not limited to aliphatic aromatic random copolyester (Ecoflex) and polydimethylsiloxane (PDMS).

[0046] The present invention will be further described below:

[0047] like Figure 1 As shown, the stretchable AC electroluminescent device based on PEDOT:PSS / ion gel in this embodiment is centered on the flexible stretchable light-emitting layer 3, and is symmetrically arranged on both sides. From the flexible stretchable light-emitting layer 3 to both sides are the ion gel layer 12, the PEDOT:PSS layer 11, and the encapsulation layer 2. The ion gel layer 12 is prepared by mixing TPU solution with ionic liquid ([EMIM][TFSI]). The flexible stretchable light-emitting layer 3 is composed of blue electroluminescent phosphor ZnS:Cu, nano-ceramic particles of barium titanate for enhancing luminous intensity, and a flexible substrate Ecoflex 00-31.

[0048] like Figure 2 As shown, in the embodiment of the present invention, an external wire 4 is arranged on the surface edge of the PEDOT:PSS layer 11 and is connected via a wire interface (silver paste) 5 .

[0049] like Figure 3As shown, the embodiment of the present invention provides a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel, including a flexible stretchable luminescent layer 3, wherein the flexible stretchable luminescent layer 3 uses Ecoflex 00-31 as a flexible substrate, includes a luminescent powder 31 and a nano-ceramic particle barium titanate 33 for enhancing the luminescent intensity, and the luminescent powder 31 emits blue fluorescence under AC voltage driving. Since the particle diameter of the luminescent powder 31 is about 200 times the particle diameter of the nano-ceramic particle barium titanate 33, doping the nano-ceramic particle barium titanate 33 in the luminescent powder 31 can significantly improve the density of the luminescent layer, and increase the electric field intensity in the luminescent layer, thereby improving the luminescent intensity.

[0050] The flexible stretchable light-emitting device prepared by the above preparation method has the advantages of high stretchability, stable luminescence and high luminescence brightness. In addition, anions and cations can migrate in the TPU matrix and PEDOT:PSS, thereby effectively combining the high stretchability of the TPU-based ion gel and the high conductivity of PEDOT:PSS, so that the entire electrode still has conductivity under high stretching rate.

[0051] In order to verify the performance of the flexible stretchable electrode prepared in the present invention, the following tests were performed:

[0052] 1. 0–100% strain dynamic cyclic tensile performance test

[0053] At both ends of the PEDOT:PSS layer of the flexible stretchable electrode 1 of the present invention, two external leads are prepared in the manner described in step 5. The sample is subjected to a dynamic cyclic tensile performance test in the strain range of 0-100% using a tensile testing machine, and the resistance value under cyclic strain is recorded in real time using a digital multimeter. Figure 4 As shown, the resistance value in 20 cycles of stretching always changes in an approximately linear trend, and the resistance value maintains a stable periodic change.

[0054] 2. 0-280% strain dynamic cyclic tensile performance test

[0055] At both ends of the PEDOT:PSS layer of the flexible stretchable electrode 1 of the present invention, two external leads are prepared in the manner described in step 5. The sample is subjected to a dynamic cyclic tensile performance test in the strain range of 0-280% using a tensile testing machine, and the resistance value under cyclic strain is recorded in real time using a digital multimeter. Figure 5 As shown in the figure, after multiple cycles, the resistance value can still remain stable at about 8 times the original resistance after stretching, and no obvious attenuation occurs.

[0056] 3. Comparison of square resistance after 100% strain release

[0057] In order to verify the superiority of the flexible stretchable transparent electrode in the present invention in terms of stretching rate and conductivity, the PEDOT:PSS material in the electrode proposed in the present invention was replaced with silver nanowires and carbon nanotubes, respectively, to prepare silver nanowire / ion gel composite electrodes and carbon nanotube / ion gel composite flexible transparent electrodes, and the electrodes were cyclically stretched to 100% strain and then recovered, and the square resistance after 1, 10, and 100 times of tensile strain release was calculated, as shown in Table 1. As can be seen from the results in the table, the conductivity of the composite electrode in the present invention patent reaches a stable state after the first stretching recovery, and its square resistance is much lower than that of the other two electrodes. The reason why the electrode maintains high conductivity is that anions and cations can migrate in the TPU matrix and PEDOT:PSS, thereby effectively combining the high stretching ability of the TPU-based ion gel and the high conductivity of PEDOT:PSS. In contrast, the other two electrodes are only simple stacks of nanomaterials and ion gels. Although the conductivity remains stable under multiple high tensile strains, the microcracks generated locally in the nanomaterials after the first stretching significantly reduce the conductivity, and cannot be compensated by ion migration.

[0058] Table 1 is a performance comparison table of the electrode proposed in the present invention and other electrodes

[0059]

[0060] Finally, it should be noted that the above embodiments and explanations are only used to illustrate the technical solution of the present invention rather than to limit it. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope disclosed in the technical solution of the present invention, which should be included in the scope of protection of the claims of the present invention.

Claims

1. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel, characterized in that: The invention comprises a flexible stretchable electrode (1), an encapsulation layer (2), a flexible stretchable light-emitting layer (3), a wire interface (5) and an external wire (4); the upper and lower parts of the flexible stretchable light-emitting layer (3) are provided with corresponding flexible stretchable electrodes (1); the flexible stretchable electrode (1) is connected to the external wire (4) through the wire interface (5); the flexible stretchable light-emitting layer (3), the upper and lower layers of the flexible stretchable electrode (1) and the wire interface (5) form a flexible light-emitting electrode body; the flexible light-emitting electrode body is encapsulated in the encapsulation layer (2); the end of the external wire (4) is arranged to pass through the encapsulation layer (2); wherein the flexible stretchable electrode (1) is composed of a PEDOT:PSS layer (11) and an ion gel layer (12); the ion gel layer (12) is arranged close to the flexible stretchable light-emitting layer (3).

2. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel according to claim 1, characterized in that: The flexible stretchable light-emitting layer (3) comprises a light-emitting powder (31), nano-ceramic particle barium titanate (33) and a light-emitting layer flexible substrate (32), wherein the light-emitting powder (31) and the nano-ceramic particle barium titanate (33) are doped in the light-emitting layer flexible substrate (32) in a mass ratio of (1:1) to (2:1).

3. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel according to claim 1, characterized in that: The ion gel layer (12) comprises dimethylacetamide (DMAC): thermoplastic polyurethane elastomer (TPU): ionic liquid ([EMIM][TFSI]) in a mass ratio of (5-8):1:(0.5-2).

4. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel according to claim 1, characterized in that: The wire interface (5) is placed on the PEDOT:PSS layer (11), and the surface of the wire interface (5) is coated with silver paste.

5. A stretchable AC electroluminescent device based on PEDOT:PSS / ion gel according to claim 1, characterized in that: The packaging layer (2) is made of flexible material.

6. The method for preparing a stretchable AC electroluminescent device based on PEDOT:PSS / ion gel according to claim 1, characterized in that: The preparation method comprises the following steps: Step 1: uniformly mix and stir the A and B components of the luminescent layer matrix material, the luminescent powder (31), and the nano-ceramic particle barium titanate (33) to obtain a viscous solution of the flexible and stretchable luminescent layer (3), put the viscous solution into a vacuum box, and evacuate the viscous solution under a negative pressure environment until no bubbles overflow from the viscous solution; Step 2: applying the bubble-free viscous solution in step 1 on the surface to be deposited, attaching the mask to the surface to be deposited by scraping, so as to achieve deposition of a flexible and stretchable light-emitting layer with controllable thickness and shape, and obtaining the flexible and stretchable light-emitting layer (3) after heating and curing; Step 3: Add DMAC as a solvent into the container, then slowly add TPU and ionic liquid ([EMIM][TFSI]); stir to form a uniform ion gel solution, and evenly spin-coat the ion gel solution on the surface of the flexible stretchable light-emitting layer (3) after plasma surface modification, heat and cure to form an ion gel layer (12); Step 4: evenly spin-coating a PEDOT:PSS solution on the surface of the flexible stretchable ion gel electrode layer, and after heating, the solvent in the solution evaporates to form a uniform PEDOT:PSS layer (11) on the surface of the flexible stretchable ion gel electrode layer; Step 5: After burning off the outer paint at the end of the enameled wire, fix it on the PEDOT:PSS layer, evenly apply silver paste so that the silver paste contacts the PEDOT:PSS layer and the end of the enameled wire at the same time, and then heat and cure it so that the enameled wire is bonded to the cured PEDOT:PSS layer through the silver paste to serve as an external lead; Step 6: Evenly mix the A and B components of the light-emitting layer matrix material in a mass ratio of 1:1, evenly apply them to the outside of the PEDOT:PSS layer, heat and cure them, and form an encapsulation layer (2) after curing.

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