A self-adhesive electroluminescent device based on surfactants and a method for producing the same

Abstract

This invention discloses a surfactant-based self-adhesive electroluminescent device and its preparation method. The preparation method includes: preparing a polydimethylsiloxane film; preparing a nanocellulose suspension; mixing the nanocellulose suspension with silver nanowires to obtain a conductive composite suspension; preparing a light-emitting layer solution; spraying the conductive composite suspension onto the surface of the polydimethylsiloxane film to obtain the electrodes of the electroluminescent device; spin-coating the light-emitting layer solution onto the upper surface of several electrodes of the electroluminescent device to form a light-emitting layer; and laminating the electrodes of several electroluminescent devices onto the light-emitting layer to obtain the surfactant-based self-adhesive electroluminescent device. The electroluminescent device provided by this invention has excellent adhesion, water resistance, fatigue resistance, high tensile strength, high surface compliance, high dielectric constant, cell compatibility, and bi-lateral light emission.

Description

Technical Field

[0001] This invention belongs to the field of polymer optoelectronic materials technology, and relates to a surfactant-based self-adhesive electroluminescent device and its preparation method. Background Technology

[0002] Wearable electroluminescent devices have become an important element in wearable displays and electronic skin. Therefore, contact between electroluminescent devices and human skin is unavoidable, and it is necessary to attach or contact the electroluminescent devices with the skin comfortably with extremely low mechanical interface stress.

[0003] Polydimethylsiloxane (PDMS), the most widely used polymer matrix for electroluminescent devices, is not soft enough and has poor comfort when in contact with human skin. At the same time, PDMS has poor adhesion, water resistance, fatigue resistance, tensile strength, dielectric constant, and double-sided display light emission performance. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a surfactant-based self-adhesive electroluminescent device and its preparation method. The prepared electroluminescent device has excellent adhesion, water resistance, fatigue resistance, high tensile strength, high surface compliance, high dielectric constant, cell compatibility, and bi-sided display light emission.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0006] A method for fabricating a surfactant-based self-adhesive electroluminescent device includes the following steps:

[0007] An adhesive polydimethylsiloxane film was prepared using polydimethylsiloxane and polyethylene glycol octylphenyl ether as raw materials.

[0008] Nanocellulose suspension was prepared using bleached wood pulp fiber as raw material;

[0009] A conductive composite suspension was prepared by mixing a cellulose nanoparticle suspension with silver nanowires.

[0010] A light-emitting layer solution was prepared using polydimethylsiloxane, luminescent powder, barium titanate, and chlorobenzene as raw materials.

[0011] Electrodes for electroluminescent devices are prepared by spraying a conductive composite suspension onto the surface of an adhesive polydimethylsiloxane film.

[0012] A light-emitting layer solution is spin-coated onto the upper surface of the electrodes of several electroluminescent devices to form a light-emitting layer;

[0013] By pressing the electrode layers of several electroluminescent devices onto the light-emitting layer, a surfactant-based self-adhesive electroluminescent device is obtained.

[0014] Optionally, a method for preparing an adhesive polydimethylsiloxane film includes:

[0015] Add curing agent and polyethylene glycol octylphenyl ether to the polydimethylsiloxane solution and stir thoroughly;

[0016] The stirred mixture is dripped onto a glass slide for leveling and curing;

[0017] The cured material is peeled off from the glass slide to obtain an adhesive polydimethylsiloxane film.

[0018] Optionally, methods for preparing nanocellulose suspensions include:

[0019] Powdered bleached wood pulp cellulose powder was added to NaOH solution to carry out the reaction, and then filtered until the pH was 8-8.5.

[0020] Place the H2SO4 solution in an oil bath. When the temperature of the H2SO4 solution and the oil bath reaches 44-45℃, slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution. After stirring, add water to terminate the reaction.

[0021] Pour the acid-hydrolyzed wood pulp cellulose into a beaker, add distilled water and let it settle. Then dialyze it until it is neutral.

[0022] Nanofiber suspension was prepared by ultrasonically exfoliating dialyzed wood pulp cellulose in an ice-water bath.

[0023] Optionally, the method for preparing the conductive composite suspension includes:

[0024] A nanocellulose suspension was added to a silver nanowire solution and stirred at room temperature to form a uniform and stable conductive composite suspension.

[0025] Optionally, the amount of nanocellulose added is 5 to 35 wt% of the solid content of silver nanowires.

[0026] Optionally, the preparation method of the luminescent layer solution includes:

[0027] BaTiO3 particles were added to chlorobenzene, stirred, and sonicated to obtain a uniformly dispersed mixture.

[0028] Add polydimethylsiloxane to the well-dispersed mixture and stir vigorously. After stirring evenly, add phosphorescent powder and continue stirring until it reaches a viscous state.

[0029] A curing agent is added to the viscous mixture, and the mixture is uniformly mixed at room temperature to obtain a high dielectric constant luminescent layer paste.

[0030] Optionally, the prepared high dielectric constant luminescent layer paste is placed in a vacuum oven to remove air bubbles.

[0031] Optionally, the curing agent is Sylgard 184.

[0032] Optionally, after the light-emitting layer is formed, it is cured. The electrodes on both sides of the light-emitting layer are arranged in parallel and staggered, and the conductive network of the electrodes of the electroluminescent device is led out through copper strips.

[0033] A surfactant-based self-adhesive electroluminescent device is prepared by the aforementioned preparation method.

[0034] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0035] This invention provides a surfactant-based self-adhesive electroluminescent device and its preparation method. Polydimethylsiloxane is modified with the surfactant polyethylene glycol octylphenyl ether to prepare a polydimethylsiloxane film with excellent adhesion, which is then used as a substrate for the electrode of the electroluminescent device, ultimately preparing an electroluminescent device with excellent adhesion.

[0036] The prepared polydimethylsiloxane film has an elastic modulus similar to that of human skin and very high surface compliance. Furthermore, due to the excellent cell compatibility of polydimethylsiloxane, the prepared electroluminescent device is expected to be used in stretchable optoelectronic display devices on human skin.

[0037] By fully utilizing the elasticity and water resistance of polydimethylsiloxane, and modifying polydimethylsiloxane with the surfactant polyethylene glycol octylphenyl ether, an electroluminescent device with high tensile strength, excellent fatigue resistance, and water resistance can be prepared, enabling it to emit light underwater.

[0038] The fabricated electroluminescent device adopts a "sandwich" structure, with the light-emitting layer sandwiched between two identical electrodes with high light transmittance. The fabricated electroluminescent device has uniform double-sided display light emission.

[0039] Modifying barium titanate particles with chlorobenzene improves their interfacial compatibility with luminescent powder and elastomer, effectively increasing the dielectric constant of the luminescent layer and thus enhancing the brightness of the electroluminescent device. Attached Figure Description

[0040] Figure 1 This is a transmittance diagram of the polydimethylsiloxane film prepared according to the present invention;

[0041] Figure 2This is an adhesion diagram of a surfactant-based self-adhesive electroluminescent device of the present invention adhering to a steel plate and human skin;

[0042] Figure 3 The diagram shows the elongation at break and elastic modulus of the polydimethylsiloxane film prepared in this invention.

[0043] Figure 4 The cyclic tensile stress-strain curve of a surfactant-based self-adhesive electroluminescent device of the present invention under 100% tensile strain is shown.

[0044] Figure 5 This is a graph showing the change in brightness over time of a surfactant-based self-adhesive electroluminescent device underwater.

[0045] Figure 6 This is a graph showing the brightness of a surfactant-based self-adhesive electroluminescent device as a function of voltage according to the present invention.

[0046] Figure 7 This is a cell survival rate diagram on the surface of a surfactant-based self-adhesive electroluminescent device according to the present invention. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0048] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and should be understood to include values ​​close to those ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0049] For the purposes of this specification and the appended claims, unless otherwise stated, all expressions, percentages, or proportions, and other numerical values ​​used in this specification and the appended claims, are to be understood to be modified by the term "about" in all cases. Furthermore, all scopes disclosed herein include their endpoints and can be combined independently.

[0050] Example 1

[0051] like Figures 1 to 7 As shown, a method for fabricating a surfactant-based self-adhesive electroluminescent device includes the following steps:

[0052] S1, Weigh 1g of polydimethylsiloxane solution, add 0.1g of curing agent Sylgard184, add 0.002g of polyethylene glycol octylphenyl ether, and stir the mixture thoroughly using a magnetic stirrer;

[0053] Weigh 0.5g of the mixture and drop it onto a glass slide to level it. Then, cure it in an oven at 30°C for 10 hours. Peel the cured material off the glass slide to obtain an adhesive polydimethylsiloxane film.

[0054] S2, weigh 25g of NaOH and add it to 100mL of stirred distilled water. After the NaOH is completely dissolved, add 5g of crushed bleached wood pulp cellulose powder. After reacting for 2 hours, filter until the pH is 8.

[0055] Prepare 50g of 60wt% H2SO4 solution;

[0056] Heat the oil bath to 44°C, put the prepared H2SO4 solution into the oil bath, and wait until the H2SO4 solution and the oil bath are at the same temperature. Slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution, and stir continuously for 30 minutes with a stirrer before adding water to stop the reaction.

[0057] Pour the acid-hydrolyzed cellulose into a beaker, add distilled water and let it settle. Then pour it into a dialysis bag and dialyze until neutral.

[0058] In an ice-water bath, the cellulose from dialysis wood pulp was exfoliated into cellulose nanofibers by sonication at 200W power for 30 minutes, thus preparing a nanocellulose suspension.

[0059] S3, dilute the 1 mg / mL silver nanowire solution with distilled water to a 0.2 mg / mL silver nanowire solution;

[0060] Weigh out the nanocellulose suspension and add it to a 0.2 mg / mL silver nanowire solution. The amount of nanocellulose added is 5 wt% of the solid content of the silver nanowires. Stir magnetically for 30 min at room temperature to form a uniform and stable conductive composite suspension.

[0061] S4, 0.1g BaTiO3 particles were dispersed in 1mL chlorobenzene, then magnetically stirred and ultrasonically treated to obtain a uniformly dispersed mixture;

[0062] 0.1g of polydimethylsiloxane was added to a uniformly dispersed mixture and stirred vigorously until homogeneous. Then, 0.1g of phosphorescent powder was added and stirring was continued until a viscous state was reached. Finally, 0.01g of curing agent Sylgard184 was added and mixed uniformly at room temperature to prepare a high dielectric constant luminescent layer paste. The prepared high dielectric constant luminescent layer paste was placed in a vacuum oven to remove air bubbles.

[0063] S5. Place the adhesive polydimethylsiloxane film on a small heating stage at 30°C, measure 0.5 mL of conductive composite suspension and use an airbrush to evenly spray it onto the adhesive polydimethylsiloxane film to obtain the electrode of the electroluminescent device.

[0064] S6. Using the electrodes of several electroluminescent devices as a substrate, the light-emitting layer paste is spin-coated to obtain a light-emitting layer of about 10 μm thickness. The layer is cured at 30°C for 10 min. Then, the conductive network of the electrodes of the electroluminescent devices is led out using copper tape.

[0065] S7, several electrodes of electroluminescent devices are laminated onto the light-emitting layer. The electrodes on both sides of the light-emitting layer are arranged in parallel and staggered. The conductive network of the electrodes of the electroluminescent devices is led out through copper strips to obtain a surfactant-based self-adhesive electroluminescent device. Then, it is placed in a 30°C oven and heated for 10 min to enhance the adhesion between the light-emitting layer and the upper and lower electrodes and ensure the complete encapsulation of the device.

[0066] Example 2

[0067] like Figures 1 to 7 As shown, a method for fabricating a surfactant-based self-adhesive electroluminescent device includes the following steps:

[0068] S1, Weigh 2g of polydimethylsiloxane solution, add 0.2g of curing agent Sylgard184, add 0.004g of polyethylene glycol octylphenyl ether, and stir the mixture thoroughly using a magnetic stirrer;

[0069] Weigh 1g of the mixture and drop it onto a glass slide to level it. Then, cure it in an oven at 40°C for 15 hours. Peel the cured material off the glass slide to obtain an adhesive polydimethylsiloxane film.

[0070] S2, weigh 50g of NaOH and add it to 200mL of stirred distilled water. After the NaOH is completely dissolved, add 10g of crushed bleached wood pulp cellulose powder. After reacting for 4 hours, filter until the pH is 8.1.

[0071] Prepare 100g of 61wt% H2SO4 solution;

[0072] Heat the oil bath to 44°C, put the prepared H2SO4 solution into the oil bath, and wait until the H2SO4 solution and the oil bath are at the same temperature. Slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution, and stir continuously for 50 minutes with a stirrer before adding water to stop the reaction.

[0073] Pour the acid-hydrolyzed cellulose into a beaker, add distilled water and let it settle. Then pour it into a dialysis bag and dialyze until neutral.

[0074] In an ice-water bath, the cellulose from dialysis wood pulp was exfoliated into cellulose nanofibers by sonication at 300W for 40 minutes, thus preparing a nanocellulose suspension.

[0075] S3, dilute the 2 mg / mL silver nanowire solution with distilled water to a concentration of 0.3 mg / mL silver nanowire solution;

[0076] Weigh out the nanocellulose suspension and add it to a 0.3 mg / mL silver nanowire solution. The amount of nanocellulose added is 10 wt% of the solid content of the silver nanowires. Stir magnetically for 50 min at room temperature to form a uniform and stable conductive composite suspension.

[0077] S4, 0.2g BaTiO3 particles were dispersed in 2mL chlorobenzene, then magnetically stirred and ultrasonically treated to obtain a uniformly dispersed mixture;

[0078] 0.2g of polydimethylsiloxane was added to a uniformly dispersed mixture and stirred vigorously until homogeneous. Then, 0.2g of phosphorescent powder was added and stirring was continued until a viscous state was reached. Finally, 0.02g of curing agent Sylgard184 was added and mixed uniformly at room temperature to prepare a high dielectric constant luminescent layer paste. The prepared high dielectric constant luminescent layer paste was placed in a vacuum oven to remove air bubbles.

[0079] S5. Place the adhesive polydimethylsiloxane film on a small heating stage at 40°C, measure 1 mL of conductive composite suspension and use an airbrush to evenly spray it onto the adhesive polydimethylsiloxane film to obtain the electrode of the electroluminescent device.

[0080] S6. Using the electrodes of several electroluminescent devices as a substrate, the light-emitting layer paste is spin-coated to obtain a light-emitting layer of about 20 μm thickness. The layer is cured at 40°C for 15 min. Then, the conductive network of the electrodes of the electroluminescent devices is led out using copper tape.

[0081] S7, several electrodes of electroluminescent devices are laminated onto the light-emitting layer. The electrodes on both sides of the light-emitting layer are arranged in parallel and staggered. The conductive network of the electrodes of the electroluminescent devices is led out through copper strips to obtain a surfactant-based self-adhesive electroluminescent device. Then, it is placed in a 40°C oven and heated for 20 min to enhance the adhesion between the light-emitting layer and the upper and lower electrodes and ensure the complete encapsulation of the device.

[0082] Example 3

[0083] like Figures 1 to 7 As shown, a method for fabricating a surfactant-based self-adhesive electroluminescent device includes the following steps:

[0084] S1, Weigh 5g of polydimethylsiloxane solution, add 0.5g of curing agent Sylgard184, add 0.005g of polyethylene glycol octylphenyl ether, and stir the mixture thoroughly using a magnetic stirrer;

[0085] Weigh 1.5g of the mixture and drop it onto a glass slide to level it. Then, cure it in an oven at 50°C for 20 hours. Peel the cured material off the glass slide to obtain an adhesive polydimethylsiloxane film.

[0086] S2, weigh 75g of NaOH and add it to 300mL of stirred distilled water. After the NaOH is completely dissolved, add 15g of crushed bleached wood pulp cellulose powder. After reacting for 6 hours, filter until the pH is 8.3.

[0087] Prepare 150g of 63wt% H2SO4 solution;

[0088] Heat the oil bath to 45°C, put the prepared H2SO4 solution into the oil bath, and wait until the H2SO4 solution and the oil bath are at the same temperature. Slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution, and stir continuously with a stirrer for 80 minutes before adding water to stop the reaction.

[0089] Pour the acid-hydrolyzed cellulose into a beaker, add distilled water and let it settle. Then pour it into a dialysis bag and dialyze until neutral.

[0090] In an ice-water bath, the cellulose from dialysis wood pulp was exfoliated into cellulose nanofibers by sonication at 350W for 50 minutes, thus preparing a nanocellulose suspension.

[0091] S3, dilute the 5 mg / mL silver nanowire solution with distilled water to a 1 mg / mL silver nanowire solution;

[0092] Weigh out the nanocellulose suspension and add 1 mg / mL silver nanowire solution. The amount of nanocellulose added is 20 wt% of the solid content of silver nanowires. Stir magnetically for 80 min at room temperature to form a uniform and stable conductive composite suspension.

[0093] S4, 0.5g BaTiO3 particles were dispersed in 5mL chlorobenzene, then magnetically stirred and ultrasonically treated to obtain a uniformly dispersed mixture;

[0094] 0.5g of polydimethylsiloxane was added to the uniformly dispersed mixture and stirred vigorously until homogeneous. Then, 1g of phosphorescent powder was added and stirred until viscous. Finally, 0.05g of curing agent Sylgard184 was added and mixed uniformly at room temperature to prepare a high dielectric constant luminescent layer paste. The prepared high dielectric constant luminescent layer paste was placed in a vacuum oven to remove air bubbles.

[0095] S5. Place the adhesive polydimethylsiloxane film on a small heating stage at 50°C, measure 1.5 mL of conductive composite suspension and use an airbrush to evenly spray it onto the adhesive polydimethylsiloxane film to obtain the electrode of the electroluminescent device.

[0096] S6. Using the electrodes of several electroluminescent devices as a substrate, the light-emitting layer paste is spin-coated to obtain a light-emitting layer of about 40 μm thickness. The layer is cured at 50°C for 20 min. Then, the conductive network of the electrodes of the electroluminescent devices is led out using copper tape.

[0097] S7, several electrodes of electroluminescent devices are laminated onto the light-emitting layer. The electrodes on both sides of the light-emitting layer are arranged in parallel and staggered. The conductive network of the electrodes of the electroluminescent devices is led out through copper strips to obtain a surfactant-based self-adhesive electroluminescent device. Then, it is placed in a 50°C oven and heated for 30 min to enhance the adhesion between the light-emitting layer and the upper and lower electrodes and ensure the complete encapsulation of the device.

[0098] Example 4

[0099] like Figures 1 to 7 As shown, a method for fabricating a surfactant-based self-adhesive electroluminescent device includes the following steps:

[0100] S1, Weigh 10g of polydimethylsiloxane solution, add 1g of curing agent Sylgard184, add 0.1g of polyethylene glycol octylphenyl ether, and stir the mixture thoroughly using a magnetic stirrer;

[0101] Weigh 2g of the mixture and drop it onto a glass slide to level it. Then, cure it in an oven at 60℃ for 30h. Peel the cured material off the glass slide to obtain an adhesive polydimethylsiloxane film.

[0102] S2, weigh 100g of NaOH and add it to 400mL of stirred distilled water. After the NaOH is completely dissolved, add 20g of crushed bleached wood pulp cellulose powder. After reacting for 8 hours, filter until the pH is 8.5.

[0103] Prepare 200g of 65wt% H2SO4 solution;

[0104] Heat the oil bath to 45°C, put the prepared H2SO4 solution into the oil bath, and wait until the H2SO4 solution and the oil bath are at the same temperature. Slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution, and stir continuously for 120 minutes with a stirrer before adding water to stop the reaction.

[0105] Pour the acid-hydrolyzed cellulose into a beaker, add distilled water and let it settle. Then pour it into a dialysis bag and dialyze until neutral.

[0106] In an ice-water bath, the cellulose from dialysis wood pulp was exfoliated into cellulose nanofibers by sonication at 400W for 60 minutes, thus preparing a nanocellulose suspension.

[0107] S3, dilute the 10 mg / mL silver nanowire solution with distilled water to a concentration of 1.5 mg / mL silver nanowire solution;

[0108] Weigh out the nanocellulose suspension and add it to a 1.5 mg / mL silver nanowire solution. The amount of nanocellulose added is 35 wt% of the solid content of the silver nanowires. Stir magnetically for 120 min at room temperature to form a uniform and stable conductive composite suspension.

[0109] S4, 1g of BaTiO3 particles were dispersed in 10mL of chlorobenzene, and then magnetically stirred and ultrasonically treated to obtain a uniformly dispersed mixture;

[0110] 1g of polydimethylsiloxane was added to the uniformly dispersed mixture and stirred vigorously until homogeneous. Then, 2g of phosphorescent powder was added and stirred until viscous. Finally, 0.1g of curing agent Sylgard184 was added and mixed uniformly at room temperature to prepare a high dielectric constant luminescent layer paste. The prepared high dielectric constant luminescent layer paste was placed in a vacuum oven to remove air bubbles.

[0111] S5. Place the adhesive polydimethylsiloxane film on a small heating stage at 60°C, measure 2 mL of conductive composite suspension and use an airbrush to evenly spray it onto the adhesive polydimethylsiloxane film to obtain the electrode of the electroluminescent device.

[0112] S6. Using the electrodes of several electroluminescent devices as a substrate, the light-emitting layer paste is spin-coated to obtain a light-emitting layer of about 50 μm thickness. The layer is cured at 60°C for 30 min. Then, the conductive network of the electrodes of the electroluminescent devices is led out using copper tape.

[0113] S7, several electrodes of electroluminescent devices are laminated onto the light-emitting layer. The electrodes on both sides of the light-emitting layer are arranged in parallel and staggered. The conductive network of the electrodes of the electroluminescent devices is led out through copper strips to obtain a surfactant-based self-adhesive electroluminescent device. Then, it is placed in a 60°C oven and heated for 60 min to enhance the adhesion between the light-emitting layer and the upper and lower electrodes and ensure the complete encapsulation of the device.

[0114] Example 5

[0115] like Figures 1 to 7 As shown, based on the method for preparing a surfactant-based self-adhesive electroluminescent device described in Examples 1 to 4, this embodiment provides a surfactant-based self-adhesive electroluminescent device, which is prepared by the method described above.

[0116] Figure 1 Among them, 0.2%, 0.4% and 0.6% of the adhesive polydimethylsiloxane films have a light transmittance of more than 80%, which is beneficial for manufacturing transparent electrodes for electroluminescent devices;

[0117] Figure 2 This indicates that the electroluminescent device has excellent adhesion;

[0118] Figure 3 This indicates that the electrode has high tensile strength and low elastic modulus;

[0119] Figure 4 This indicates that the electroluminescent device has excellent fatigue resistance;

[0120] Figure 5 This indicates that the electroluminescent device has excellent water resistance;

[0121] Figure 6 This indicates that the brightness of the electroluminescent device prepared using chlorobenzene-modified barium titanate is significantly increased;

[0122] Figure 7 This indicates that the electroluminescent device has excellent cell compatibility.

[0123] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for fabricating a surfactant-based self-adhesive electroluminescent device, characterized in that, Includes the following steps: An adhesive polydimethylsiloxane film was prepared using polydimethylsiloxane and polyethylene glycol octylphenyl ether as raw materials. Nanocellulose suspension was prepared using bleached wood pulp fiber as raw material; A conductive composite suspension was prepared by mixing a cellulose nanoparticle suspension with silver nanowires. A light-emitting layer solution was prepared using polydimethylsiloxane, luminescent powder, barium titanate, and chlorobenzene as raw materials. Electrodes for electroluminescent devices are prepared by spraying a conductive composite suspension onto the surface of an adhesive polydimethylsiloxane film. The light-emitting layer solution is spin-coated onto the upper surface of the electrodes of several electroluminescent devices to form a light-emitting layer; after the light-emitting layer is formed, it is cured. A self-adhesive electroluminescent device based on a surfactant is prepared by laminating electrodes of several electroluminescent devices onto a light-emitting layer; the electrodes on both sides of the light-emitting layer are arranged in parallel and staggered, and the conductive network of the electrodes of the electroluminescent device is led out through a copper strip; the process also includes subsequently heating the self-adhesive electroluminescent device in an oven. A method for preparing an adhesive polydimethylsiloxane film includes: Add curing agent and polyethylene glycol octylphenyl ether to the polydimethylsiloxane solution and stir thoroughly; The stirred mixture is dripped onto a glass slide for leveling and curing; the curing is carried out in an oven at 30°C for 10 hours, in an oven at 40°C for 15 hours, in an oven at 50°C for 20 hours, or in an oven at 60°C for 30 hours. The cured material is peeled off from the glass slide to obtain an adhesive polydimethylsiloxane film. The preparation method of the luminescent layer solution includes: BaTiO3 particles were added to chlorobenzene, stirred, and sonicated to obtain a uniformly dispersed mixture. Add polydimethylsiloxane to the well-dispersed mixture and stir vigorously. After stirring evenly, add phosphorescent powder and continue stirring until it reaches a viscous state. A curing agent is added to the viscous mixture, and the mixture is uniformly mixed at room temperature to obtain a high dielectric constant luminescent layer paste.

2. The method for preparing a surfactant-based self-adhesive electroluminescent device according to claim 1, characterized in that, Methods for preparing nanocellulose suspensions include: Powdered bleached wood pulp cellulose powder was added to NaOH solution to carry out the reaction, and then filtered until the pH was 8-8.

5. Place the H2SO4 solution in an oil bath. When the temperature of the H2SO4 solution and the oil bath reaches 44-45℃, slowly add the wood pulp cellulose powder treated with NaOH to the H2SO4 solution. After stirring, add water to terminate the reaction. Pour the acid-hydrolyzed wood pulp cellulose into a beaker, add distilled water and let it settle. Then dialyze it until it is neutral. Nanofiber suspension was prepared by ultrasonically exfoliating dialyzed wood pulp cellulose in an ice-water bath.

3. The method for preparing a surfactant-based self-adhesive electroluminescent device according to claim 2, characterized in that, A method for preparing a conductive composite suspension includes: A nanocellulose suspension was added to a silver nanowire solution and stirred at room temperature to form a uniform and stable conductive composite suspension.

4. The method for preparing a surfactant-based self-adhesive electroluminescent device according to claim 3, characterized in that: The amount of nanocellulose added is 5-35 wt% of the solid content of silver nanowires.

5. The method for preparing a surfactant-based self-adhesive electroluminescent device according to claim 1, characterized in that: The prepared high dielectric constant luminescent layer paste was placed in a vacuum oven to remove air bubbles.

6. The method for preparing a surfactant-based self-adhesive electroluminescent device according to claim 1, characterized in that: The curing agent is Sylgard 184.

7. A surfactant-based self-adhesive electroluminescent device, characterized in that: Prepared by the preparation method according to any one of claims 1 to 6.

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