Gel-based biocompatible wearable light-emitting display device and method of making the same
The vertically stacked stretchable light-emitting display device constructed by transparent ion-gel electrodes and hydrogels solves the mechanical robustness and biocompatibility issues of wearable electroluminescent devices, realizes self-powered real-time display, and expands the application of wearable electronics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN JINGLONG PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2024-03-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing wearable electroluminescent devices exhibit increased electrode sheet resistance under high elongation levels, resulting in poor mechanical robustness. Furthermore, the need for external power supply limits their applications, making it difficult to achieve biocompatibility and long-term stability.
A vertically stacked stretchable light-emitting display device is constructed using transparent ion-gel electrodes and hydrogels. It is self-powered by the piezoelectric effect and integrates biocompatible materials to achieve real-time display without external power supply.
It enables real-time display without external power supply, reducing energy consumption, and has good mechanical flexibility and biocompatibility, making it suitable for real-time display and physiological signal monitoring in the field of wearable electronics.
Smart Images
Figure CN118262624B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wearable electronic device technology, and in particular to a gel-based biocompatible wearable light-emitting display device and its preparation method. Background Technology
[0002] In recent years, electroluminescent devices have gained significant attention from researchers due to their outstanding performance. These devices possess numerous advantages, such as low power consumption, ease of fabrication, high durability, and uniform light emission, thus demonstrating immense potential in many fields, including biomedicine, aerospace, displays, and information communication. Furthermore, these devices exhibit high scalability and flexibility, allowing them to be molded into various shapes to meet the needs of wearable electronics, human health monitoring, and other areas. Therefore, flexible electroluminescent devices will play an increasingly important role in future development.
[0003] Flexible electroluminescent devices require all components to possess flexible mechanical properties, including slight bending, curling, and stretching deformation. This requirement has been achieved in organic light-emitting diodes (OLEDs) and alternating current (AC) electroluminescent devices. Particularly in AC electroluminescent devices, sandwiching the emitting layer between two electrodes offers advantages such as low power consumption, simple fabrication, long lifespan, and high flexibility. However, the mechanical robustness of highly conductive electrodes is a fundamental requirement for wearable display devices. To achieve both mechanical deformation and high conductivity of conductive electrodes, various conductive materials, such as single-walled carbon nanotubes, silver nanowires, and graphene, have been explored in combination with flexible substrates. However, when these stretchable electrodes operate at large elongation levels or undergo long-term use, the sheet resistance increases sharply due to the high Young's modulus of solid electrodes, their tendency to separate and slide, and the inhomogeneous network structure. Therefore, simultaneously achieving stretchability, long-term stability, low cost, and biocompatibility of the working electrodes remains a key challenge for realizing wearable display devices.
[0004] In electroluminescent devices, electrons in the phosphor are accelerated when a voltage exceeding a threshold voltage is applied, generating high-energy "hot" electrons. These hot electrons collide with the luminescent center, exciting ground-state electrons to transition to excited states. They then undergo donor-acceptor recombination with excited-state electrons trapped in shallow donor levels and holes in acceptor levels above the valence band, emitting light through radiative recombination. However, electroluminescent devices require complex external high-frequency / voltage AC power supplies, limiting their application in portable wearable displays.
[0005] Therefore, it is necessary to develop a gel-based biocompatible wearable light-emitting display device and its fabrication method to solve the above problems. Summary of the Invention
[0006] The purpose of this invention is to design a gel-based biocompatible wearable light-emitting display device and its fabrication method in order to solve the above-mentioned problems.
[0007] The present invention achieves the above objectives through the following technical solutions:
[0008] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0009] S1. Preparation of a stretchable elastomer substrate with a bottom that is biocompatible; by adding a high concentration of stretchable silicone rubber material solution into a pre-designed mold, then drying it, and then peeling off the cured elastomer, a biocompatible stretchable elastomer substrate can be obtained.
[0010] S2. A first transparent ionogel electrode is disposed above a stretchable elastomer substrate; the transparent, high-conductivity biocompatible first transparent ionogel electrode is used for the acquisition of piezoelectric signals at one end of a wearable light-emitting display device.
[0011] S3. A hydrogel with piezoelectric effect is placed above the first transparent ion gel electrode; the natural polymer and polyvinylidene fluoride with piezoelectric properties are dissolved, frozen and thawed, then soaked in water and transferred to the first transparent ion gel electrode.
[0012] S4. A second transparent ionogel electrode is placed above the hydrogel with piezoelectric effect; a transparent, high-conductivity biocompatible second transparent ionogel electrode is prepared for the acquisition of piezoelectric signals at the other end;
[0013] S5. A stretchable light-emitting layer is placed above the second transparent ion gel electrode; phosphor and elastomer are mixed and injected into a pre-designed mold, and after curing, the slice is transferred to the second transparent ion gel electrode;
[0014] S6. A third transparent ionogel electrode is placed above the stretchable light-emitting layer; a transparent, high-conductivity biocompatible third transparent ionogel electrode is prepared and then transferred onto the stretchable light-emitting layer.
[0015] A biocompatible wearable light-emitting display device based on gel includes, from bottom to top, a biocompatible stretchable elastomer substrate, a first transparent ion gel electrode, a piezoelectric hydrogel, a second transparent ion gel electrode, a stretchable light-emitting layer, and a third transparent ion gel electrode.
[0016] The beneficial effects of this invention are as follows:
[0017] 1. By vertically stacking and integrating two functional devices, namely hydrogel with piezoelectric effect and stretchable light-emitting layer with electroluminescence, it is possible to achieve real-time display of the device by generating electrical energy through mechanical energy without the need for an external power source. It is not limited by time or space, effectively reduces energy consumption, and is conducive to the development of more wearable functional applications.
[0018] 2. Vertically stacked wearable display devices are constructed using biocompatible ion gel electrode materials and hydrogel materials. Their soft, flexible, and stretchable properties allow them to come into contact with the skin without causing irritation or discomfort. They can also be designed for different wearing parts, and their size and curvature can be adjusted at will to better conform to the curves and structure of the human body, providing greater comfort, wearability, and safety. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the gel-based biocompatible wearable light-emitting display device in this application;
[0020] In the figure, 1-biocompatible stretchable elastomer substrate; 2-first transparent ionogel electrode; 3-hydrogel with piezoelectric effect; 4-second transparent ionogel electrode; 5-stretchable light-emitting layer; 6-third transparent ionogel electrode. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0025] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0027] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0028] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0029] S1. Preparation of a stretchable, biocompatible elastomer substrate with a bottom stretchable structure; by adding a high-concentration stretchable silicone rubber material solution into a pre-designed tetrafluoroethylene mold, then drying, and then peeling off the cured elastomer, a biocompatible stretchable elastomer substrate can be obtained; the drying is performed using at least one of the following methods: constant temperature hot table heating, oven heating, far-infrared heating, and hot air heating; the stretchable silicone rubber material is a bio-based thermoplastic polyester elastomer (TPEE), a bio-based thermoplastic polyurethane elastomer (TPU), or a bio-based thermoplastic polyamide elastomer (TPAE).
[0030] S2. A first transparent ionogel electrode is disposed above a stretchable elastomer substrate; the transparent, high-conductivity biocompatible first transparent ionogel electrode is used for the acquisition of piezoelectric signals at one end of a wearable light-emitting display device.
[0031] S3. A piezoelectric hydrogel is disposed above the first transparent ion gel electrode; a natural polymer is dissolved with polyvinylidene fluoride having piezoelectric properties, frozen and thawed, then immersed in water and transferred to the first transparent ion gel electrode; the natural polymer includes at least one of agarose, methylcellulose, hyaluronic acid, gelatin, and chitosan.
[0032] S4. A second transparent ionogel electrode is placed above the hydrogel with piezoelectric effect; a transparent, high-conductivity biocompatible second transparent ionogel electrode is prepared for the acquisition of piezoelectric signals at the other end;
[0033] S5. A stretchable light-emitting layer is placed above the second transparent ion gel electrode; phosphor and elastomer are mixed and injected into a pre-designed mold, and after curing, the slice is transferred to the second transparent ion gel electrode;
[0034] S6. A third transparent ionogel electrode is placed above the stretchable light-emitting layer; a transparent, high-conductivity biocompatible third transparent ionogel electrode is prepared and then transferred onto the stretchable light-emitting layer. The first, second, and third transparent ionogel electrodes are all prepared by crosslinking acrylic monomers, ionic liquids, polyethylene glycol diacrylate, and α-ketoglutaric acid. The acrylic monomers are dissolved in the ionic liquid [C₂mim][EtSO₄] at a concentration of 1.00 mol / L. -1 Then, polyethylene glycol diacrylate was added using 0.60 mol% acrylic acid as a crosslinking agent, and α-ketoglutaric acid was added using 1.00 mol% acrylic acid as an initiator. A transparent ion-gel electrode was obtained after irradiation with a UV lamp. The UV lamp had a power of 50W and a wavelength of 365nm, and the irradiation time was 1 hour.
[0035] like Figure 1 As shown, a biocompatible wearable light-emitting display device based on gel is prepared by the above method. It includes a biocompatible stretchable elastomer substrate 1, a first transparent ion gel electrode 2, a piezoelectric hydrogel 3, a second transparent ion gel electrode 4, a stretchable light-emitting layer 5, and a third transparent ion gel electrode 6, which are connected sequentially from bottom to top.
[0036] The luminescence intensity of this wearable light-emitting display device is related to the phosphor content and thickness in the stretchable light-emitting layer, as well as the real-time driving voltage provided by the piezoelectric effect (i.e., the stress condition of the piezoelectric device). Due to the biocompatibility and intrinsic softness of the gel, the device exhibits excellent mechanical deformation properties, maintaining stable self-powered luminescence under bending, torsion, and stretching conditions. Furthermore, this display system can be comfortably worn on different parts of the human body, collecting mechanical energy from the human body (such as clapping, arm bending, and leg bending) through a piezoelectric gel generator and converting it into electrical energy to drive the electroluminescent device, achieving real-time visual display.
[0037] This application aims to realize a self-powered wearable light-emitting display device by vertically integrating a gel-based, biocompatible piezoelectric hydrogel and an electroluminescent device. The device uses a piezoelectric generator to collect mechanical energy from the human body and convert it into electrical energy to drive the electroluminescent device, thereby enabling real-time visualization of the human body's state. This will expand and promote the application of flexible display electronic devices in the fields of safe and intelligent wearables, real-time physiological signal monitoring, disease prevention, and human-computer interaction, and lay a solid foundation for the further development of high-density integrated, high-performance wearable self-powered light-emitting devices.
[0038] Example 1 (Control Group):
[0039] A method for fabricating a wearable light-emitting display device includes the following steps:
[0040] 1. To prepare a bottom-stretchable silicone elastomer, TPEE, TPU or TPAE solution is added to a pre-designed tetrafluoroethylene mold, and then dried in an oven (60℃, 4h), and then the cured elastomer is peeled off.
[0041] 2. A transparent, high-conductivity biocompatible ion gel electrode was prepared for the acquisition of piezoelectric signals at one end (the stretchable ion gel electrode material was prepared by crosslinking acrylic monomer, ionic liquid, polyethylene glycol diacrylate and α-ketoglutaric acid).
[0042] 3. Dissolve a certain proportion of natural polymer with polyvinylidene fluoride with piezoelectric properties. Taking gelatin as an example, the mixing ratio is 1:1. After freezing / thawing, soak it in water and transfer it to the electrode.
[0043] 4. Based on the above process, a transparent, high-conductivity biocompatible ion gel electrode is prepared for another signal acquisition end of the piezoelectric device, thus completing the preparation of the piezoelectric functional device. This electrode is also used in electroluminescent devices.
[0044] 5. Based on the above process, mix phosphor and elastomer (ratio of 1.1:1) and inject into a pre-designed mold. After curing, transfer the slice to the ion gel electrode to complete the preparation of the light-emitting layer. The thickness of the light-emitting layer is 50 μm.
[0045] 6. Based on the above process, a transparent, high-conductivity ion gel electrode is prepared, and then transferred onto the device to complete the fabrication of the self-powered light-emitting device;
[0046] 7. Under standard test conditions, with an output voltage of 4V under a stress of 5 kPa, the device emits dim light. Under 100% stretching, the device's light emission performance decreases by 7.2%, and the device's performance remains unchanged during repeated stretching.
[0047] Example 2:
[0048] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0049] 1. To prepare a bottom-stretchable silicone elastomer, TPEE, TPU or TPAE solution is added to a pre-designed tetrafluoroethylene mold, and then dried in an oven (60℃, 4h), and then the cured elastomer is peeled off.
[0050] 2. A transparent, high-conductivity biocompatible ion gel electrode was prepared for the acquisition of piezoelectric signals at one end (the stretchable ion gel electrode material was prepared by crosslinking acrylic monomer, ionic liquid, polyethylene glycol diacrylate and α-ketoglutaric acid).
[0051] 3. Dissolve a certain proportion of natural polymer with polyvinylidene fluoride with piezoelectric properties. Taking gelatin as an example, the mixing ratio is 2:1. After freezing / thawing, soak it in water and transfer it to the electrode.
[0052] 4. Based on the above process, a transparent, high-conductivity biocompatible ion gel electrode is prepared for another signal acquisition end of the piezoelectric device, thus completing the preparation of the piezoelectric functional device. This electrode is also used in electroluminescent devices.
[0053] 5. Based on the above process, mix phosphor and elastomer (ratio of 1.1:1) and inject into a pre-designed mold. After curing, transfer the slice to the ion gel electrode to complete the preparation of the light-emitting layer. The thickness of the light-emitting layer is 50 μm.
[0054] 6. Based on the above process, a transparent, high-conductivity ion gel electrode is prepared, and then transferred onto the device to complete the fabrication of the self-powered light-emitting device;
[0055] 7. Under standard test conditions, with a stress of 5 kPa, the output voltage is 6.4V, the device has a bright light emission, and the light emission performance of the device decreases by 6.9% when stretched to 100%. Furthermore, the device performance remains unchanged during repeated stretching.
[0056] Example 3:
[0057] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0058] 1. To prepare a bottom-stretchable silicone elastomer, TPEE, TPU or TPAE solution is added to a pre-designed tetrafluoroethylene mold, and then dried in an oven (60℃, 4h), and then the cured elastomer is peeled off.
[0059] 2. A transparent, high-conductivity biocompatible ion gel electrode was prepared for the acquisition of piezoelectric signals at one end (the stretchable ion gel electrode material was prepared by crosslinking acrylic monomer, ionic liquid, polyethylene glycol diacrylate and α-ketoglutaric acid).
[0060] 3. Dissolve a certain proportion of natural polymer with polyvinylidene fluoride with piezoelectric properties. Taking gelatin as an example, the mixing ratio is 0.5:1. After freezing / thawing, soak it in water and transfer it to the electrode.
[0061] 4. Based on the above process, a transparent, high-conductivity biocompatible ion gel electrode is prepared for another signal acquisition end of the piezoelectric device, thus completing the preparation of the piezoelectric functional device. This electrode is also used in electroluminescent devices.
[0062] 5. Based on the above process, mix phosphor and elastomer (ratio of 1.1:1) and inject into a pre-designed mold. After curing, transfer the slice to the ion gel electrode to complete the preparation of the light-emitting layer. The thickness of the light-emitting layer is 50 μm.
[0063] 6. Based on the above process, a transparent, high-conductivity ion gel electrode is prepared, and then transferred onto the device to complete the fabrication of the self-powered light-emitting device;
[0064] 7. Under standard test conditions, with a stress of 5 kPa, the output voltage is 1.1V, and the device emits very weak light. Under 100% stretching, the device's light emission performance remains basically unchanged, and the device's performance remains unchanged during repeated stretching.
[0065] Example 4:
[0066] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0067] 1. To prepare a bottom-stretchable silicone elastomer, TPEE, TPU or TPAE solution is added to a pre-designed tetrafluoroethylene mold, and then dried in an oven (60℃, 4h), and then the cured elastomer is peeled off.
[0068] 2. A transparent, high-conductivity biocompatible ion gel electrode was prepared for the acquisition of piezoelectric signals at one end (the stretchable ion gel electrode material was prepared by crosslinking acrylic monomer, ionic liquid, polyethylene glycol diacrylate and α-ketoglutaric acid).
[0069] 3. Dissolve a certain proportion of natural polymer with polyvinylidene fluoride with piezoelectric properties. Taking gelatin as an example, the mixing ratio is 2:1. After freezing / thawing, soak it in water and transfer it to the electrode.
[0070] 4. Based on the above process, a transparent, high-conductivity biocompatible ion gel electrode is prepared for another signal acquisition end of the piezoelectric device, thus completing the preparation of the piezoelectric functional device. This electrode is also used in electroluminescent devices.
[0071] 5. Based on the above process, mix phosphor and elastomer (ratio of 1.1:1) and inject into a pre-designed mold. After curing, transfer the slice to the ion gel electrode to complete the preparation of the light-emitting layer. The thickness of the light-emitting layer is 100 μm.
[0072] 6. Based on the above process, a transparent, high-conductivity ion gel electrode is prepared, and then transferred onto the device to complete the fabrication of the self-powered light-emitting device;
[0073] 7. Under standard test conditions, with a stress of 5 kPa, the output voltage is 6.4V, the device's luminous brightness is improved, and the device's luminous performance decreases by 5.7% when stretched to 100%. Furthermore, the device's performance remains unchanged during repeated stretching.
[0074] Example 5:
[0075] The method for fabricating a gel-based biocompatible wearable light-emitting display device includes the following steps:
[0076] 1. To prepare a bottom-stretchable silicone elastomer, TPEE, TPU or TPAE solution is added to a pre-designed tetrafluoroethylene mold, and then dried in an oven (60℃, 4h), and then the cured elastomer is peeled off.
[0077] 2. A transparent, high-conductivity biocompatible ion gel electrode was prepared for the acquisition of piezoelectric signals at one end (the stretchable ion gel electrode material was prepared by crosslinking acrylic monomer, ionic liquid, polyethylene glycol diacrylate and α-ketoglutaric acid).
[0078] 3. Dissolve a certain proportion of natural polymer with polyvinylidene fluoride with piezoelectric properties. Taking gelatin as an example, the mixing ratio is 2:1. After freezing / thawing, soak it in water and transfer it to the electrode.
[0079] 4. Based on the above process, a transparent, high-conductivity biocompatible ion gel electrode is prepared for another signal acquisition end of the piezoelectric device, thus completing the preparation of the piezoelectric functional device. This electrode is also used in electroluminescent devices.
[0080] 5. Based on the above process, mix phosphor and elastomer (ratio of 1.1:1) and inject into a pre-designed mold. After curing, transfer the slice to the ion gel electrode to complete the preparation of the light-emitting layer. The thickness of the light-emitting layer is 150 μm.
[0081] 6. Based on the above process, a transparent, high-conductivity ion gel electrode is prepared, and then transferred onto the device to complete the fabrication of the self-powered light-emitting device;
[0082] 7. Under standard test conditions, at 5 kPa, the output voltage is 120V, and the device's luminous brightness is greatly increased to the maximum value. Under 100% stretching, the device's luminous performance decreases by 6.3%, and the device's performance remains unchanged during repeated stretching.
[0083] It can be seen that by introducing a gel-based biocompatible wearable light-emitting device fabrication method (i.e., the stretchable light-emitting devices prepared in Examples 2-5), the device performance can be optimized by controlling the proportion and content of hydrogel components in the functional layer of the wearable system and the thickness of the active layer in the light-emitting active layer of the electroluminescent device. This lays the foundation for the efficient operation of a biocompatible gel self-powered display system (i.e., the self-powered light-emitting system prepared in Example 1). When an integrated device is fabricated using biocompatible ionogels / hydrogels and elastomer materials, its power supply and light emission performance remain essentially unchanged (<7%) under stretching conditions, and the light emission performance does not significantly decrease after repeated stretching. Therefore, this device has a certain mechanical deformation capability and can maintain stable self-powered light emission under bending, torsion, and stretching conditions. Furthermore, this display system can be comfortably worn on different parts of the human body, collecting human mechanical energy (such as clapping, arm bending, and leg bending) through the piezoelectric effect and converting it into electrical energy to drive the electroluminescent device, achieving real-time visual display. This makes it have broad application prospects in the field of flexible electronic wearables.
[0084] 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 gel-based biocompatible wearable light-emitting display device, characterized in that, Includes the following steps: S1. Preparation of a stretchable elastomer substrate with a bottom that is biocompatible; by adding a high concentration of stretchable silicone rubber material solution into a pre-designed mold, then drying it, and then peeling off the cured elastomer, a biocompatible stretchable elastomer substrate can be obtained. S2. A first transparent ionogel electrode is disposed above a stretchable elastomer substrate; the transparent, high-conductivity biocompatible first transparent ionogel electrode is used for the acquisition of piezoelectric signals at one end of a wearable light-emitting display device. S3. A hydrogel with piezoelectric effect is placed above the first transparent ion gel electrode; the natural polymer and polyvinylidene fluoride with piezoelectric properties are dissolved, frozen and thawed, then soaked in water and transferred to the first transparent ion gel electrode. S4. A second transparent ion-gel electrode is disposed above a hydrogel with a piezoelectric effect; A transparent, high-conductivity biocompatible second transparent ion-gel electrode was fabricated for the acquisition of piezoelectric signals at the other end; S5. A stretchable light-emitting layer is placed above the second transparent ion gel electrode; phosphor and elastomer are mixed and injected into a pre-designed mold, and after curing, the slice is transferred to the second transparent ion gel electrode; S6. A third transparent ion gel electrode is disposed above the stretchable light-emitting layer; A transparent, high-conductivity biocompatible third transparent ion gel electrode was prepared and then transferred onto a stretchable light-emitting layer.
2. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 1, characterized in that, In step S1, the stretchable silicone rubber material is TPEE, TPU, or TPAE.
3. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 1, characterized in that, In step S3, the natural polymer includes at least one of agarose, methylcellulose, hyaluronic acid, gelatin, and chitosan.
4. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 1, characterized in that, The first, second, and third transparent ion gel electrodes were all prepared by crosslinking acrylic monomers, ionic liquids, polyethylene glycol diacrylate, and α-ketoglutaric acid.
5. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 4, characterized in that, Acrylic acid monomer was dissolved in the ionic liquid [C₂mim][EtSO₄] at a concentration of 1.00 mol / L. -1 Then, polyethylene glycol diacrylate was added with 0.60 mol% acrylic acid as a crosslinking agent, and α-ketoglutaric acid was added with 1.00 mol% acrylic acid as an initiator. After irradiation with ultraviolet light, a transparent ion gel electrode was obtained.
6. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 5, characterized in that, The UV lamp has a power of 50W and a wavelength of 365nm. The UV lamp irradiation time is 1 hour.
7. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 1, characterized in that, In step S1, the mold is a tetrafluoroethylene mold.
8. The method for fabricating a gel-based biocompatible wearable light-emitting display device according to claim 1, characterized in that, In step S1, the drying process employs at least one of the following methods: constant temperature hot table heating, oven heating, far-infrared heating, and hot air heating.
9. The gel-based biocompatible wearable light-emitting display device prepared by the preparation method according to any one of claims 1-8, characterized in that, It includes, from bottom to top, a biocompatible stretchable elastomer substrate, a first transparent ion gel electrode, a piezoelectric hydrogel, a second transparent ion gel electrode, a stretchable light-emitting layer, and a third transparent ion gel electrode, which are connected in sequence.