A large-area PEDOT-type electrochromic device and its preparation method

Abstract

The present invention discloses a large-area PEDOT-based electrochromic device and a method for preparing the same. The method comprises: S1, material preparation; S2, pre-cleaning; S3, aging; S4, adhesive protection; S5, electroplating: electrodepositing an electrochromic layer A and an ion storage layer B on a plating substrate; S6, conductor printing: printing the A and B circuits; S7, conductor curing; S8, dam glue: printing dam glue on layer A using a dispensing process, followed by UV or thermal curing to form a dam; S9, coating or dispensing a transfer layer; S10, vacuum degassing; S11, encapsulation glue: printing encapsulation glue on the periphery of the dam glue layer A using a dispensing process; and S12, device packaging. The present invention also provides a large-area PEDOT-based electrochromic device prepared by this method. The preparation method provided by the present invention can produce a uniform, high-quality PEDOT film, improve product yield, and significantly reduce costs.

Description

Technical Field

[0001] The present invention relates to a large-area electrochromic device and a preparation method thereof in the field of electrochromic technology, and in particular to a large-area PEDOT-based electrochromic device and a preparation method thereof. Background Art

[0002] Electrochromic devices can undergo reversible changes in color and transmittance when driven by an external voltage. PEDOT (polyethylenedioxythiophene) is widely used in electrochromic material research due to its simple molecular structure, small band gap, and high electrical conductivity. Electroplating is often used to produce uniform PEDOT electrochromic materials to ensure stable device performance. However, traditional electroplating methods are often used to produce small-area PEDOT electrochromic devices. Producing uniform, high-quality PEDOT films in large-area devices through electroplating is difficult, resulting in significantly reduced yields and increased costs. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-area PEDOT-based electrochromic device and a preparation method thereof, which can solve the problems existing in the existing electroplating process mentioned in the background technology.

[0004] In order to achieve the above-mentioned object, the present invention provides a method for preparing a large-area PEDOT-type electrochromic device, wherein the method comprises: S1, material preparation: cutting the electroplating substrate; S2, pre-cleaning: using a cleaning solution to clean the electroplating substrate; S3, aging: baking the electroplating substrate for aging; S4, adhesive protection: after aging, attaching protective adhesive to the electroplating substrate to reserve pattern electroplating; S5, electroplating: electroplating the electrochromic layer A and the ion storage layer B on the electroplating substrate respectively; S6, printing wires: printing the A layer and the B layer circuits; S7, wire curing: baking and curing the printed A layer and the B layer; S8, dam glue: applying the Dam glue through a dispensing process Print on layer A, and then form a dam by UV or heat curing; S9, scrape or dispense the transmission layer: drop the gel electrolyte into the groove formed by the dam glue of layer A, and scrape it flat; or dispense the gel electrolyte into the dam glue of layer A, so that the thickness of the transmission layer is the same as the thickness of the dam glue; S10, vacuum degassing: vacuum degassing the gel electrolyte; S11, packaging glue: print the packaging glue on the outside of the dam glue of layer A through the dispensing process, and make the thickness of the packaging glue the same as the dam glue; S12, device packaging: attach layer B to layer A under vacuum conditions, cover the transmission layer in the process of contact with the surface of layer B, and adhere to layer A packaging glue, and finally cure the packaging glue by UV or heat.

[0005] In the above-mentioned method for preparing a large-area PEDOT-based electrochromic device, the electroplating substrate is any one of transparent ITO, AZO, FTO conductive glass or conductive film.

[0006] In the above-mentioned method for preparing a large-area PEDOT-based electrochromic device, the cleaning solution is acetone, ethanol and water; and the electroplated substrate is cleaned in the order of acetone, ethanol and water.

[0007] The above-mentioned method for preparing a large-area PEDOT-type electrochromic device includes electroplating. The material of the electrochromic layer A is PEDOT. During electroplating, an instantaneous high voltage is first applied, and then the current density is changed and electroplating is continued; the material of the ion storage layer B is PB, and current is directly applied for electroplating.

[0008] In the above-mentioned method for preparing a large-area PEDOT-based electrochromic device, in the electroplating process, the electrochromic layer A and the ion storage layer B are axially symmetrical.

[0009] The above-mentioned method for preparing large-area PEDOT-type electrochromic devices includes the following steps: after electroplating, the electroplated substrate is removed from the electrolytic tank, soaked and cleaned in ethanol and deionized water in sequence, then vacuum-dried, and the protective glue is removed to expose the unplated area.

[0010] The above-mentioned method for preparing large-area PEDOT-type electrochromic devices, wherein the printed conductors are printed on the unplated area to connect the plated substrate with the external device, and the conductive liquid is printed according to the designed circuit; the conductive liquid is any one of silver paste, copper paste or carbon paste; after printing is completed, layer A and layer B are placed in an oven for curing.

[0011] The above-mentioned method for preparing large-area PEDOT-type electrochromic devices, wherein the gel electrolyte is made of any one or more aqueous or organic solutions of potassium chloride, sodium chloride, lithium perchlorate, lithium hexafluorophosphate, lithium perchlorate, and sodium perchlorate; when it is necessary to increase the viscosity of the ion transport layer, a polymer material including polyacrylamide, polyvinyl alcohol, polyethylene glycol, and polymethyl methacrylate is added.

[0012] In the above-mentioned method for preparing a large-area PEDOT-based electrochromic device, the organic solution uses a solvent selected from any one of propylene carbonate, ethylene carbonate, N-methylpyrrolidone, and a mixture of at least two thereof.

[0013] The present invention also provides a large-area PEDOT-based electrochromic device prepared by the above method.

[0014] The large-area PEDOT-based electrochromic device and its preparation method provided by the present invention have the following advantages:

[0015] The present invention can obtain a uniform and high-quality PEDOT film when preparing large-area devices by electroplating, thereby improving the yield rate and significantly reducing costs.

[0016] The large-area PEDOT-based electrochromic device prepared by this method has a simple process, is easy to operate, has high economic benefits, and is suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a process flow chart of the method for preparing a large-area PEDOT-based electrochromic device of the present invention.

[0018] Figure 2 Schematic diagram of the structure of the large-area PEDOT-based electrochromic device of the present invention.

[0019] Among them, 1. A layer electrochromic layer; 2. dam glue; 3. gel electrolyte; 4. B layer ion storage layer. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0021] The preparation method of the large-area PEDOT electrochromic device provided by the present invention is as follows: Figure 1 shown.

[0022] The method includes:

[0023] S1. Material preparation: cutting the electroplating substrate;

[0024] S2, pre-cleaning: using cleaning solution to clean the electroplating substrate;

[0025] S3, aging: baking the electroplated substrate for aging;

[0026] S4, adhesive protection: After the aging is completed, apply protective adhesive on the electroplating substrate to reserve pattern electroplating;

[0027] S5, electroplating: electro-depositing the electrochromic layer 1 (A) and the ion storage layer 4 (B) on the electroplating substrate;

[0028] S6, Printing conductors: Print the A layer and B layer circuits, and print the conductive liquid according to the designed circuits;

[0029] S7, wire curing: baking and curing the printed A layer and B layer;

[0030] S8, Dam glue: Print the Dam glue on the A layer through the dispensing process, and then cure it by UV or heat to form a dam;

[0031] S9. Scrape or glue the transmission layer: drop the gel electrolyte 3 into the groove formed by the dam glue 2 in layer A and scrape and smooth it; or glue the gel electrolyte 3 into the dam glue 2 in layer A so that the thickness of the transmission layer is the same as that of the dam glue 2;

[0032] S10, vacuum degassing: performing vacuum degassing on the gel electrolyte 3;

[0033] S11, encapsulation glue: the encapsulation glue is printed on the periphery of the dam glue 2 of layer A by a dispensing process, and the thickness of the encapsulation glue is the same as that of the dam glue 2;

[0034] S12. Device packaging: Attach layer B to layer A under vacuum conditions, cover the transmission layer while it is in contact with the surface of layer B, adhere layer A packaging glue, and finally cure the packaging glue by UV or heat.

[0035] Preferably, S1, preparing materials, cutting the electroplating substrate into required areas, where the cutting area is determined by the actual electroplating area.

[0036] The electroplating substrate used is any one of transparent ITO (indium tin oxide), AZO (aluminum-doped zinc oxide), FTO (fluorine-doped SnO2), conductive glass or conductive film.

[0037] S2. Pre-cleaning: Use cleaning fluid to clean the electroplating substrate to improve cleanliness.

[0038] The cleaning solution is acetone, ethanol and water; the electroplating substrate is cleaned in the order of acetone, ethanol and water.

[0039] S3, aging, is to place the electroplated substrate into an oven for aging baking.

[0040] S4. Glue protection. The protective glue used is used to isolate the electroplating substrate and the electrolyte. After the electroplating is completed, the protective glue is peeled off to expose the unplated area.

[0041] S5. Electroplating: The material of the electrochromic layer 1 of layer A is PEDOT (polyethylene dioxythiophene). During electroplating, instantaneous high voltage is first applied to generate a large number of nucleation sites on the surface of the electroplated substrate to ensure the uniformity of the coating and prevent defects in the coating. This principle is similar to the crystallization of inorganic materials.

[0042] The high voltage range is 3V to 6V, the time is 4 to 16s, and the current density is changed to 0.06mA cm after applying the high voltage. -2 ~0.6mA cm -2 Continue electroplating for 40s to 260s.

[0043] The material of the B-layer ion storage layer 4 is PB (Prussian blue), and the applied current density is 0.008 mA cm -2 ~0.12mAcm -2 , the electroplating time is 80s~220s.

[0044] The electrochromic layer 1 (A) and the ion storage layer 4 (B) are axially symmetrical.

[0045] During the electroplating process, the distance between the working electrode and the counter electrode of the electrochromic layer A 1 and the ion storage layer B 4 is 0.8 cm to 3.5 cm.

[0046] After the electroplating is completed, the electroplated substrate is removed from the electrolytic tank, soaked and cleaned in ethanol and deionized water for 0.5 to 12 minutes respectively, and then vacuum dried at 50℃ to 85℃ for 0.5h to 2.5h, with a vacuum degree greater than 100kPa; then the protective glue is peeled off to expose the unplated area.

[0047] S6. Printed conductors are printed onto unplated areas to connect the electroplated substrate with external devices, and conductive liquid is printed according to the designed circuit; the conductive liquid can be any one of silver paste, copper paste or carbon paste.

[0048] S7, wire curing, is to put the A layer and the B layer into the oven for curing after the wire printing is completed.

[0049] S8, Dam glue: Print the Dam glue on layer A through a dispensing process. Silicone can be used as the Dam glue (i.e., Dam glue or dam coating glue). The thickness of the Dam glue 2 is 10 μm to 350 μm.

[0050] Glue dispensing is a process, also known as gluing, coating, filling, dripping, etc. It is to apply, fill, and drip electronic glue, oil or other liquids onto the product to make the product stick, fill, insulate, fix, and have a smooth surface.

[0051] S9, scraping or dispensing the transmission layer, the material of the gel electrolyte 3 used is any one or more of aqueous solutions or organic solutions of potassium chloride, sodium chloride, lithium perchlorate, lithium hexafluorophosphate, lithium perchlorate, sodium perchlorate and the like.

[0052] When the viscosity of the ion transport layer needs to be increased, polymer materials including polyacrylamide, polyvinyl alcohol, polyethylene glycol, polymethyl methacrylate, etc. can be appropriately added.

[0053] The solvent of the organic solution is preferably any one of propylene carbonate, ethylene carbonate, N-methylpyrrolidone, etc., or a mixture of at least two thereof.

[0054] S10, vacuum degassing, vacuum degree ≤-50kPa, degassing time is 8min~120min.

[0055] S11 , encapsulating glue, preferably RTV glue, and then printing the RTV glue on the periphery of the A-layer dam glue 2 through a dispensing process.

[0056] RTV stands for room temperature vulcanized silicone rubber, which is silicone rubber that can vulcanize at room temperature. RTV adhesive offers a long shelf life and stable performance, and can bond common metals and non-metallic materials. It is suitable for bonding and sealing a variety of metals and between metals and non-metallic materials.

[0057] S12. Device packaging: Attach layer B to layer A under vacuum conditions with a vacuum degree of <-100kPa. Slowly cover the transmission layer while it is in contact with the surface of layer B, and adhere layer A with RTV glue. Finally, cure the RTV glue by UV or heat.

[0058] The present invention also provides a large-area PEDOT-based electrochromic device prepared by this method. Figure 2 shown.

[0059] The large-area PEDOT-based electrochromic device and its preparation method provided by the present invention are further described below with reference to the embodiments.

[0060] Example 1

[0061] A method for preparing a large-area PEDOT-based electrochromic device comprises the following steps:

[0062] S1. Material preparation: Cut the electroplating substrate into the required area. The cutting area is determined by the actual electroplating area.

[0063] The electroplating substrate is a transparent ITO conductive film with a thickness of 110 μm.

[0064] S2. Pre-cleaning: Use cleaning fluid to clean the electroplating substrate to improve cleanliness.

[0065] The cleaning solution is acetone, ethanol and water; the cleaning order is acetone, ethanol, water; the cleaning time is 1 minute.

[0066] S3. Aging: Place the electroplated substrate in an oven for aging and baking.

[0067] The aging temperature is 120℃ and the aging time is 50min.

[0068] S4. Glue protection: After aging is completed, protective glue is attached to the electroplating substrate to reserve pattern electroplating.

[0069] The protective adhesive is rectangular, with an outer length and width of 80 cm and 60 cm respectively.

[0070] S5. Electroplating: Electrodepositing the electrochromic layer 1 (layer A) and the ion storage layer 4 (layer B) on the electroplating substrate.

[0071] The electrochromic layer 1 of layer A is made of PEDOT. During electroplating, a 5V instantaneous high voltage is first applied for 15 seconds, and then the current density is quickly changed to 0.3mAcm -2 The electroplating time is 150s. The material of the ion storage layer 4 of layer B is PB, and the applied current density is 0.05mAcm -2 , the electroplating time is 150s.

[0072] The electrochromic layer 1 (A) and the ion storage layer 4 (B) are axially symmetrical.

[0073] During the electroplating process, the distance between the working electrode and the counter electrode of the electrochromic layer 1 of the A layer and the ion storage layer 4 of the B layer is 1 cm.

[0074] After electroplating is complete, remove the plated substrate from the electrolytic bath and rinse it in ethanol and deionized water for 1 minute, respectively. Then, vacuum dry it at 60°C for 1 hour, with a vacuum greater than 100 kPa. Remove the protective adhesive to expose the unplated area.

[0075] S6. Printing conductors: Print the A layer and B layer circuits, and print the conductive liquid according to the designed circuits.

[0076] The conductors are printed on the unplated areas to connect the plated substrate with external devices, and the conductive liquid is printed according to the designed circuit. The conductive liquid is silver paste.

[0077] Printing line width is 0.5mm, scraper speed is 100mms -1 , the mesh number of the screen is 300 mesh.

[0078] S7. Wire curing: Place the printed A layer and B layer into an oven for curing.

[0079] The curing temperature of the silver paste wire is 60°C and the curing time is 50 minutes.

[0080] S8, Dam glue: Print the Dam glue on the A layer through the dispensing process, and UV or heat cure to form a dam.

[0081] The thickness of the dam glue 2 is 120 μm.

[0082] S9, scraping and coating the transmission layer: drop the gel electrolyte 3 into the groove formed by the dam glue 2 of layer A, and scrape and coat it evenly to make the thickness of the transmission layer the same as that of the dam glue 2.

[0083] A 0.1M lithium perchlorate propylene carbonate solution was selected as the gel electrolyte 3, and 25 wt.% polymethyl methacrylate was added to increase the viscosity of the gel electrolyte 3. The speed of the scraping was set to 10 mm / s. -1 .

[0084] S10, vacuum degassing: performing vacuum degassing on the gel electrolyte 3.

[0085] The vacuum degree of vacuum degassing is -60kPa, and the degassing time is 10min.

[0086] S11, packaging glue: print RTV glue on the periphery of the A-layer dam glue 2 through a dispensing process, and make the thickness of the packaging glue the same as that of the dam glue 2.

[0087] S12. Device packaging: Attach layer B to electrochromic layer A 1 under vacuum conditions with a vacuum degree of <-100kPa, so that the transport layer gel electrolyte 3 and the ion storage layer B 4 are slowly covered during contact, air bubbles are expelled, and RTV glue is adhered to layer A. Finally, the RTV glue is cured by UV or heat.

[0088] This embodiment also provides a large-area PEDOT-based electrochromic device prepared by this method.

[0089] Example 2

[0090] A method for preparing a large-area PEDOT-based electrochromic device comprises the following steps:

[0091] S1. Material preparation: Cut the electroplating substrate into the required area. The cutting area is determined by the actual electroplating area.

[0092] The electroplating substrate is transparent FTO conductive glass with a thickness of 1.8 mm.

[0093] S2. Pre-cleaning: Use cleaning fluid to clean the electroplating substrate to improve cleanliness.

[0094] The cleaning solution is acetone, ethanol and water; the cleaning order is acetone, ethanol, water; the cleaning time is 0.5 min.

[0095] S3. Aging: Place the electroplated substrate in an oven for aging and baking.

[0096] The aging temperature is 60°C and the aging time is 60 min.

[0097] S4. Glue protection: After aging is completed, protective glue is attached to the electroplating substrate to reserve pattern electroplating.

[0098] The protective glue is rectangular, with an outer length and width of 100 cm and 70 cm respectively.

[0099] S5. Electroplating: Electrodepositing the electrochromic layer 1 (layer A) and the ion storage layer 4 (layer B) on the electroplating substrate.

[0100] The electrochromic layer 1 of layer A is made of PEDOT. During electroplating, a 6V instantaneous high voltage is first applied for 10 seconds, and then the current density is quickly changed to 0.25mAcm-2 The electroplating time is 200s. The material of the ion storage layer 4 of layer B is PB, and the applied current density is 0.01mAcm -2 , the electroplating time is 200s.

[0101] The electrochromic layer 1 (A) and the ion storage layer 4 (B) are axially symmetrical.

[0102] During the electroplating process, the distance between the working electrode and the counter electrode of the electrochromic layer 1 of the A layer and the ion storage layer 4 of the B layer is 2 cm.

[0103] After the electroplating is completed, the electroplated substrate is removed from the electrolytic tank, soaked and cleaned in ethanol and deionized water for 5 minutes in sequence, and then vacuum dried at 70°C for 1.5 hours with a vacuum degree greater than 100kPa; then the protective glue is peeled off to expose the unplated area.

[0104] S6. Printing conductors: Print the A layer and B layer circuits, and print the conductive liquid according to the designed circuits.

[0105] The conductors are printed on the unplated areas to connect the electroplated substrate with external devices, and the conductive liquid is printed according to the designed circuit. The conductive liquid is copper paste.

[0106] Printing line width is 0.1mm, scraper speed is 10mms -1 , the mesh number of the screen is 50 meshes.

[0107] S7. Wire curing: Place the printed A layer and B layer into an oven for curing.

[0108] The curing temperature of the copper paste conductor is 130°C and the curing time is 60 minutes.

[0109] S8, Dam glue: Print the Dam glue on the A layer through the dispensing process, and then cure it by UV or heat to form a dam.

[0110] The thickness of the dam glue 2 is 200 μm.

[0111] S9. Glue-dispensing transmission layer: Glue the gel electrolyte 3 into the A-layer dam glue 2 so that the thickness of the transmission layer is the same as that of the dam glue 2.

[0112] 0.1M lithium perchlorate propylene carbonate solution was selected as gel electrolyte 3. The speed during scraping was set to 80 mms -1 .

[0113] S10, vacuum degassing: performing vacuum degassing on the gel electrolyte 3.

[0114] The vacuum degree of vacuum degassing is -80kPa, and the degassing time is 60min.

[0115] S11, packaging glue: print RTV glue on the periphery of the A-layer dam glue 2 through a dispensing process, and make the thickness of the packaging glue the same as that of the dam glue 2.

[0116] S12. Device packaging: Attach layer B to electrochromic layer A 1 under vacuum conditions with a vacuum degree of <-100kPa, so that the transport layer gel electrolyte 3 and the ion storage layer B 4 are slowly covered during contact, air bubbles are expelled, and RTV glue is adhered to layer A. Finally, the RTV glue is cured by UV or heat.

[0117] This embodiment also provides a large-area PEDOT-based electrochromic device prepared by this method.

[0118] Example 3

[0119] A method for preparing a large-area PEDOT-based electrochromic device comprises the following steps:

[0120] S1. Material preparation: Cut the electroplating substrate into the required area. The cutting area is determined by the actual electroplating area.

[0121] The electroplating substrate is transparent ZTO conductive glass with a thickness of 1.8 mm.

[0122] S2. Pre-cleaning: Use cleaning fluid to clean the electroplating substrate to improve cleanliness.

[0123] The cleaning solution is acetone, ethanol and water; the cleaning order is acetone, ethanol, water; the cleaning time is 5 minutes.

[0124] S3. Aging: Place the electroplated substrate in an oven for aging and baking.

[0125] The aging temperature is 150℃ and the aging time is 120min.

[0126] S4. Glue protection: After aging is completed, protective glue is attached to the electroplating substrate to reserve pattern electroplating.

[0127] The protective adhesive is rectangular, with an outer length and width of 90 cm and 80 cm respectively.

[0128] S5. Electroplating: Electrodepositing the electrochromic layer 1 (layer A) and the ion storage layer 4 (layer B) on the electroplating substrate.

[0129] The electrochromic layer 1 of layer A is made of PEDOT. During electroplating, a 4V instantaneous high voltage is first applied for 5 seconds, and then the current density is quickly changed to 0.5mAcm -2 The plating time is 100s. The material of the ion storage layer 4 of layer B is PB, and the applied current density is 0.1mAcm -2 , the plating time is 100s.

[0130] The electrochromic layer 1 (A) and the ion storage layer 4 (B) are axially symmetrical.

[0131] During the electroplating process, the distance between the working electrode and the counter electrode of the electrochromic layer A 1 and the ion storage layer B 4 is 3 cm.

[0132] After the electroplating is completed, the electroplated substrate is removed from the electrolytic tank, soaked and cleaned in ethanol and deionized water for 10 minutes in sequence, and then vacuum dried at 80°C for 2 hours with a vacuum degree greater than 100kPa; then the protective glue is peeled off to expose the unplated area.

[0133] S6. Printing conductors: Print the A layer and B layer circuits, and print the conductive liquid according to the designed circuits.

[0134] The conductors are printed on the unplated areas to connect the plated substrate with external devices, and the conductive liquid is printed according to the designed circuit. The conductive liquid is carbon paste.

[0135] Printing line width is 5mm, scraper speed is 150mms -1 , the mesh number of the screen is 500 mesh.

[0136] S7. Wire curing: Place the printed A layer and B layer into an oven for curing.

[0137] The curing temperature of the carbon slurry conductor is 120°C and the curing time is 30 minutes.

[0138] S8, Dam glue: Print the Dam glue on the A layer through the dispensing process, and then cure it by UV or heat to form a dam.

[0139] The thickness of the dam glue 2 is 250 μm.

[0140] S9. Scrape / glue the transmission layer: drop the gel electrolyte 3 into the groove formed by the dam glue 2 of layer A and scrape it flat; or glue the gel electrolyte 3 into the dam glue 2 of layer A so that the thickness of the transmission layer is the same as that of the dam glue 2.

[0141] 0.1M lithium perchlorate propylene carbonate solution was selected as gel electrolyte 3. The speed of the scraping was set to 20 mms -1 .

[0142] S10, vacuum degassing: performing vacuum degassing on the gel electrolyte 3.

[0143] The vacuum degree of vacuum degassing is -90kPa, and the degassing time is 30min.

[0144] S11, packaging glue: print RTV glue on the periphery of the A-layer dam glue 2 through a dispensing process, and make the thickness of the packaging glue the same as that of the dam glue 2.

[0145] S12. Device packaging: Attach layer B to layer A under vacuum conditions with a vacuum degree of <-100kPa, so that the transport layer gel electrolyte 3 and layer B ion storage layer 4 are slowly covered during contact, air bubbles are expelled, and layer A RTV glue is adhered. Finally, the RTV glue is cured by UV or heat.

[0146] This embodiment also provides a large-area PEDOT-based electrochromic device prepared by this method.

[0147] The large-area PEDOT-based electrochromic device and preparation method provided by the present invention can solve the problem mentioned in the background art that the existing electroplating process is difficult to obtain a uniform, high-quality PEDOT film when preparing large-area PEDOT-based electrochromic devices, resulting in a significant reduction in yield and a significant increase in cost.

[0148] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for preparing a large-area PEDOT-based electrochromic device, characterized in that: The method comprises: S1. Material preparation: cutting the electroplating substrate; S2, pre-cleaning: using cleaning solution to clean the electroplating substrate; S3, aging: baking the electroplated substrate for aging; S4, adhesive protection: After the aging is completed, apply protective adhesive on the electroplating substrate to reserve pattern electroplating; S5. Electroplating: Electrodepositing an electrochromic layer A and an ion storage layer B on the electroplating substrate respectively; S6, printed conductors: Printing A layer and B layer circuits; S7, wire curing: baking and curing the printed A layer and B layer; S8, Dam glue: Print the Dam glue on the A layer through the dispensing process, and then cure it by UV or heat to form a dam; S9. Scrape or dispense the transmission layer: drop the gel electrolyte into the groove formed by the dam glue of layer A and scrape it flat; or dispense the gel electrolyte into the dam glue of layer A so that the thickness of the transmission layer is the same as that of the dam glue; S10, vacuum degassing: vacuum degassing the gel electrolyte; S11, packaging glue: print the packaging glue on the periphery of the A-layer dam glue through the dispensing process, and make the thickness of the packaging glue the same as that of the dam glue; S12, device packaging: attaching layer B to layer A under vacuum conditions, covering the transmission layer in contact with the surface of layer B, and adhering layer A encapsulation glue, and finally curing the encapsulation glue by UV or heat; The electroplating substrate is any one of transparent ITO, AZO, FTO conductive glass or conductive film; the cleaning solution is acetone, ethanol and water; the electroplating substrate is cleaned in the order of acetone, ethanol and water. In the electroplating, the material of the electrochromic layer A is PEDOT, and during electroplating, an instantaneous high voltage is first applied, and then the current density is changed to continue electroplating; the material of the ion storage layer B is PB, and the electroplating is performed by directly applying current. In the electroplating, the electrochromic layer A is axially symmetrical with the ion storage layer B. After the electroplating is completed, the electroplated substrate is removed from the electrolytic tank, soaked and cleaned in ethanol and deionized water in sequence, and then vacuum dried, and the protective glue is removed to expose the unplated area. The printed wire is to print the wire on the unplated area to connect the electroplated substrate with external equipment, and the conductive liquid is printed according to the designed circuit; The conductive liquid is any one of silver paste, copper paste or carbon paste; after printing, layer A and layer B are placed in an oven for curing.

2. The method for preparing a large-area PEDOT-based electrochromic device according to claim 1, wherein: The gel electrolyte is made of any one or more of an aqueous solution or organic solution of potassium chloride, sodium chloride, lithium perchlorate, lithium hexafluorophosphate, and sodium perchlorate; when the viscosity of the ion transport layer needs to be increased, a polymer material including polyacrylamide, polyvinyl alcohol, polyethylene glycol, and polymethyl methacrylate is added.

3. The method for preparing a large-area PEDOT-based electrochromic device according to claim 2, wherein: The organic solution uses a solvent selected from any one of propylene carbonate, ethylene carbonate, N-methylpyrrolidone, and a mixture of at least two of them.

4. A large-area PEDOT-based electrochromic device prepared by the method according to any one of claims 1 to 3.

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