Stretchable electrochromic device compositions, methods for making electrochromic members, and stretchable electrochromic devices made by the methods

Abstract

The present invention relates to a stretchable electrochromic device composition, a method for manufacturing an electrochromic member, and a stretchable electrochromic device manufactured thereby. The electrochromic device composition according to an embodiment of the present invention comprises: a polymer resin, a color-changing material, and a plasticizer. In one embodiment, the plasticizer is a primary plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

Description

Technical Field

[0001] This invention relates to a stretchable electrochromic device composition, a method for manufacturing an electrochromic component, and a stretchable electrochromic device manufactured by the method. The invention comprises propylene carbonate (PC), or comprises propylene carbonate and ethylene carbonate (EC).

[0002] This invention is the result of the project “Development of dielectrics and ionic conductors based on plasticized polymers and their application in next-generation organic electronic devices (using 3D printing)”, which was launched in 2024 and funded by the Ministry of Science and ICT of Korea and supported by the National Research Foundation of Korea (RS-2024-00348475). Background Technology

[0003] An electrochromic device is a device that contains an electrochromic material and changes color in response to an externally applied voltage. Various materials (such as polymer compounds and metal oxides) are applied to the electrochromic material, and its color changes reversibly in response to a voltage applied to the electrodes.

[0004] Recently, the application areas of this electrochromic device are expanding, for example, using it in smart window systems that block external views and sunlight, and in vehicle glass that displays information (such as maps and text).

[0005] Traditional electrochromic devices use liquid electrochromic materials, which can lead to electrolyte leakage and limit their application in flexible displays. Recently, solidified water-based electrolytes have been developed, but water evaporates easily, necessitating the installation of a protective layer to prevent evaporation.

[0006] The prior art includes Korean Patent Publication No. 10-2078481. Summary of the Invention

[0007] Technical issues

[0008] The present invention provides a stretchable electrochromic device composition with improved color efficiency and color change speed, a method for manufacturing electrochromic components, and a stretchable electrochromic device manufactured by the method.

[0009] The present invention also has light transmittance and elasticity.

[0010] The present invention also has a long lifespan and excellent durability.

[0011] Furthermore, due to its flexibility and elasticity, it can be applied to various fields.

[0012] Furthermore, due to the simplicity of the manufacturing method, production efficiency can be improved and manufacturing costs can be reduced.

[0013] Technical solution

[0014] According to an exemplary embodiment of the present invention, the electrochromic device composition comprises a polymer resin, a color-changing material, and a plasticizer. In one embodiment, the plasticizer is a main plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a main plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

[0015] When the plasticizer is the main plasticizer and propylene carbonate, propylene carbonate can be included in an amount of about 3 wt% to 11 wt% based on the weight of the main plasticizer.

[0016] When the plasticizer is the main plasticizer, propylene carbonate and ethylene carbonate are included, propylene carbonate may be included in an amount of about 2 wt% to 8 wt% based on the weight of the main plasticizer, and ethylene carbonate may be included in an amount of about 2 wt% to 8 wt% based on the weight of the main plasticizer.

[0017] When the plasticizer is the main plasticizer and propylene carbonate, propylene carbonate can be included in an amount of about 35 wt% to 85 wt% based on the weight of the polymer resin.

[0018] When the plasticizer is the main plasticizer, propylene carbonate and ethylene carbonate, propylene carbonate may be included in an amount of about 25 wt% to 75 wt% based on the weight of the polymer resin, and ethylene carbonate may be included in an amount of about 25 wt% to 75 wt% based on the weight of the polymer resin.

[0019] When the plasticizer is the main plasticizer, propylene carbonate and ethylene carbonate, the weight ratio of propylene carbonate to ethylene carbonate can be about 3:1 to 1:3.

[0020] The primary plasticizer can be dibutyl adipate (DBA).

[0021] According to another exemplary embodiment of the present invention, a method for manufacturing an electrochromic component includes: dissolving a polymer resin in a solvent to prepare a mixture; adding a plasticizer to the mixture; and adding a color-changing material to the mixture. In one embodiment, the plasticizer is a main plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a main plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

[0022] According to another exemplary embodiment of the present invention, the electrochromic device includes an electrochromic device layer, which is prepared by drying an electrochromic device composition containing a polymer resin, a color-changing material, and a plasticizer. In one embodiment, the plasticizer is a main plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a main plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

[0023] Beneficial effects

[0024] The stretchable electrochromic device composition according to embodiments of the present invention and the method for manufacturing electrochromic components can provide a stretchable electrochromic device with improved color efficiency and color change speed.

[0025] In addition, the present invention also has light transmittance and elasticity.

[0026] In addition, the present invention has a long lifespan and excellent durability.

[0027] Furthermore, due to its flexibility and elasticity, it can be applied to various fields.

[0028] Furthermore, due to the simplicity of the manufacturing method, production efficiency can be improved and manufacturing costs can be reduced. Attached Figure Description

[0029] Figure 1 The figure illustrates a method for manufacturing an electrochromic component according to an embodiment of the present invention.

[0030] Figure 2 The results of the measurement of the ionic conductivity of the electrochromic component manufactured according to the embodiment are shown.

[0031] Figure 3 The results of the transmittance measurement of the electrochromic component manufactured according to the embodiment are shown.

[0032] Figure 4 The color efficiency of an electrochromic component manufactured according to an embodiment is shown.

[0033] Figure 5 The figure illustrates a method for manufacturing an electrochromic component according to another embodiment of the present invention.

[0034] Figure 6 The results of ionic conductivity measurements of an electrochromic component manufactured according to another embodiment are shown.

[0035] Figure 7 The results of a transmissivity measurement of an electrochromic component manufactured according to another embodiment are shown.

[0036] Figure 8The color efficiency of an electrochromic component manufactured according to another embodiment is shown. Detailed Implementation

[0037] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. However, various other modifications can be made to the embodiments according to the present invention, and the scope of the invention should not be construed as limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to explain the invention more completely to those skilled in the art.

[0038] Electrochromic device composition

[0039] The electrochromic device composition according to embodiments of the present invention comprises a polymer resin, a color-changing material, and a plasticizer. In one embodiment, the plasticizer is a main plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a main plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

[0040] A polymer resin forms the matrix in the electrochromic device composition. After plasticization with a plasticizer, the polymer resin can possess light transmittance, flexibility, and elasticity. For this purpose, the polymer resin can be at least one of polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), polyurethane (PU), polymethyl methacrylate (PMMA), polydimethylsiloxane (PDMS), polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), polyethylene oxide (PEO), polyimide (PI), or polyethylene terephthalate (PET). In particular, high light transmittance, flexibility, and elasticity can be achieved by using polyvinyl chloride (PVC). Polyvinyl chloride can be represented by the following structural formula 1.

[0041] [Structure 1]

[0042]

[0043] (n is a natural number)

[0044] In one embodiment, the plasticizer comprises a primary plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer comprises a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC). The plasticizer is a material used to plasticize a polymer resin.

[0045] The primary plasticizer can be dibutyl adipate (DBA), but is not particularly limited to this.

[0046] Dibutyl adipic acid can be represented by the following structural formula 2.

[0047] [Structure 2]

[0048]

[0049] Based on 100 parts by weight of the polymer resin, the primary plasticizer can be included in the following amounts: about 700 to 1200 parts by weight, preferably about 700 to 1000 parts by weight, more preferably about 700 to 900 parts by weight. If the amount of the primary plasticizer is too low, crystallization is likely to occur in the prepared electrochromic device; if the amount of the primary plasticizer is too high, the mechanical properties may decrease.

[0050] Propylene carbonate (PC) increases the ionic conductivity of electrochromic devices, thereby improving the speed of color change and color efficiency. Propylene carbonate can be represented by structural formula 3.

[0051] [Structure 3]

[0052]

[0053] In embodiments where the plasticizer comprises a primary plasticizer and propylene carbonate, propylene carbonate may be included in an amount of about 3 wt% to 11 wt%, preferably about 10 wt% to 10.5 wt%, based on the weight of the primary plasticizer. Furthermore, propylene carbonate may be included in an amount of about 35 wt% to 85 wt%, preferably about 80 wt% to 85 wt%, based on the weight of the polymer resin. If the amount of propylene carbonate is too high, leakage and gelation may occur; if the amount is too low, the ionic conductivity may not be sufficiently improved.

[0054] In another embodiment where the plasticizer comprises a primary plasticizer, propylene carbonate, and ethylene carbonate, propylene carbonate may be included in an amount of about 2 wt% to 8 wt%, preferably about 4 wt% to 6 wt%, based on the weight of the primary plasticizer. Furthermore, propylene carbonate may be included in an amount of about 25 wt% to 75 wt%, based on the weight of the polymer resin. If the amount of propylene carbonate is too high, leakage and gelation may occur; if the amount is too low, the ionic conductivity may not be sufficiently improved.

[0055] Ethylene carbonate (EC) is a material with a high dielectric constant, which increases the number of free ions in electrochromic devices. Ethylene carbonate can be represented by structural formula 4.

[0056] [Structure 4]

[0057]

[0058] In another embodiment where the plasticizer comprises a primary plasticizer, propylene carbonate, and ethylene carbonate, ethylene carbonate may be included in an amount of about 2 wt% to 8 wt%, preferably about 4 wt% to 6 wt%, based on the weight of the primary plasticizer. Furthermore, ethylene carbonate may be included in an amount of about 25 wt% to 75 wt%, based on the weight of the polymer resin. If the amount of ethylene carbonate is too high, it cannot dissolve, resulting in the formation of a solid on the gel surface; if the amount is too low, the ionic conductivity cannot be sufficiently improved.

[0059] In another embodiment, the weight ratio of propylene carbonate to ethylene carbonate can be from about 3:1 to 1:3, preferably from about 6:4 to 4:6, and more preferably from about 1:1. Within this range, the electrochromic device exhibits the best ionic conductivity, color change rate, and color efficiency.

[0060] In embodiments of this application, the color-changing material can be a material used to change the color of the polymer gel, and DHV[TFSI]2 can be used according to embodiments of the present invention, but the material is not limited thereto. Meanwhile, DHV[TFSI]2 can be represented by the following structural formula 5.

[0061] [Structure 5]

[0062]

[0063] Based on 100 parts by weight of polymer resin, the color-changing material may be included in an amount of about 5 to 100 parts by weight, preferably about 10 to 20 parts by weight.

[0064] The electrochromic device composition may further comprise an ionic liquid. An ionic liquid is a material that typically remains in a non-volatile liquid state at temperatures of 100°C or lower, while simultaneously improving the movement of ions and electrons. Various types of ionic liquids can be used, but preferably, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imine salt (EMIM-TFSI) can be used. By defining the ionic liquid as described above, high light transmittance of the electrochromic device layer can be maintained. EMIM-TFSI can be represented by the following structural formula 6.

[0065] [Structure 6]

[0066]

[0067] Based on 100 parts by weight of the polymer resin, the ionic liquid can be included in an amount of about 100 to 200 parts by weight, preferably about 110 to 130 parts by weight. If the amount of ionic liquid is too high, the transmittance may decrease.

[0068] The electrochromic device composition may further include a reducing agent, and the reducing agent may be an anodic redox compound. The anodic redox compound may be either ferrocene or dimethylferrocene (dmFC), preferably dimethylferrocene. Dimethylferrocene may be represented by the following structural formula 7.

[0069] [Structure 7]

[0070]

[0071] Based on 100 parts by weight of polymer resin, the anodic oxidation-reduction compound may be included in an amount of about 1 to 20 parts by weight, preferably about 12 to 18 parts by weight.

[0072] Method for manufacturing electrochromic components

[0073] A method for manufacturing an electrochromic component according to an embodiment of the present invention includes: dissolving a polymer resin in a solvent to prepare a mixture; adding a plasticizer to the mixture; and adding a color-changing material to the mixture. In one embodiment, the plasticizer is a main plasticizer and propylene carbonate (PC). In another embodiment, the plasticizer is a main plasticizer, propylene carbonate (PC), and ethylene carbonate (EC). The invention may further include adding additives, such as ionic liquids and reducing agents. Furthermore, it may further include removing the solvent from the mixed solution.

[0074] The descriptions of polymer resins, primary plasticizers, propylene carbonate, ionic liquids, reducing agents, etc., are the same as previously stated.

[0075] Dissolving the polymer resin in a solvent to prepare a mixture is carried out by mixing the polymer resin in the solvent and stirring the mixture. The solvent can be a polar organic solvent. This is to make the polymer resin (such as PVC) easily soluble. The polar organic solvent can be any one of dioxane, tetrahydrofuran (THF), acetone, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), and 1-methyl-2-pyrrolidone (NMP). The solvent can be used in an amount sufficient to dissolve the polymer resin. This step can be carried out at room temperature.

[0076] When adding a plasticizer to a mixture, in one embodiment, the plasticizer is a primary plasticizer and propylene carbonate (PC); in another embodiment, the plasticizer is a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC). Although the plasticizers can be mixed without regard to the order, adding the primary plasticizer first can improve the plasticizing efficiency and ionic conductivity of the polymer resin. In this case, the step may include adding the primary plasticizer to the mixture and then adding propylene carbonate to the mixture containing the primary plasticizer, or adding both propylene carbonate and ethylene carbonate.

[0077] In one embodiment, when adding the primary plasticizer to the mixture, the primary plasticizer may be included in an amount of about 700 to 1200 parts by weight, preferably about 700 to 1000 parts by weight, more preferably about 750 to 850 parts by weight, based on 100 parts by weight of polymer resin.

[0078] In another embodiment, when adding the primary plasticizer to the mixture, the primary plasticizer may be included in an amount of about 700 to 1200 parts by weight, preferably about 700 to 1000 parts by weight, and more preferably about 700 to 900 parts by weight, based on 100 parts by weight of the polymer resin. The addition of propylene carbonate and ethylene carbonate to the mixture containing the primary plasticizer can be carried out by first mixing and stirring the propylene carbonate and ethylene carbonate, and then adding the propylene carbonate and ethylene carbonate to the mixture containing the primary plasticizer.

[0079] Adding a color-changing material to a mixture can be done by directly adding the color-changing material to the mixture. Alternatively, the color-changing material can be dissolved in a solvent to prepare a color-changing material solution, which can then be mixed into a pre-prepared mixture. The solvent can be any substance capable of dissolving the color-changing material, and its composition can vary depending on the color-changing material. The solvent can be any one of dioxane, tetrahydrofuran (THF), acetone, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), and 1-methyl-2-pyrrolidone (NMP).

[0080] The present invention may further include the addition of additives, such as ionic liquids and reducing agents. The steps may be performed regardless of the preceding steps and their order. Preferably, these steps may be performed after the plasticizer has been mixed.

[0081] Solvents can be removed from a mixed solution by drying the mixture at room temperature or in an oven.

[0082] Electrochromic devices

[0083] An electrochromic device according to an embodiment of the present invention includes: a first electrode; a second electrode; and an electrochromic device layer that changes color in response to a voltage between the first electrode and the second electrode, and the electrochromic device layer comprises the electrochromic device composition previously described.

[0084] The first and second electrodes are commonly used electrodes in electronic devices and are not particularly limited. However, in order to have light transmittance and flexibility, the electrodes may include ITO glass, ITO-PEN, etc.

[0085] The electrochromic device layer may comprise the electrochromic device composition described above, and may be prepared from the electrochromic device composition in appropriate dimensions and thickness according to the previously described method for manufacturing electrochromic components.

[0086] In one embodiment, the electrochromic device layer can be prepared by drying an electrochromic device composition comprising a polymer resin, a color-changing material, a primary plasticizer, and propylene carbonate (PC). In another embodiment, the electrochromic device layer can be prepared by drying an electrochromic device composition comprising a polymer resin, a color-changing material, a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

[0087] The descriptions of polymer resins, primary plasticizers, propylene carbonate, ethylene carbonate, ionic liquids, reducing agents, etc., are the same as previously stated.

[0088] Example: Manufacturing of an electrochromic component according to an embodiment

[0089] Example 1 (D8.5P0.5): PVC was from Scientific Polymer Products, Inc., DBA was from TCI, PC was from Daejung Chemicals & Metals CO., LTD., EMIM-TFSI was from io-li-tec, dmFC was from TCI, and THF as solvent was from Daejung Chemicals & Metals CO., LTD. 0.3531 g of PVC was dissolved in 25 mL of THF at room temperature by stirring. Then, 3.0012 g of DBA was added and stirred. Next, 0.1471 g of PC, 0.4237 g of EMIM-TFSI, 0.2483 g of DHV[TFSI]2, and 0.0581 g of dmFC were added, and the mixture was stirred at room temperature. The stirred mixture was poured into Petri dishes and dried at room temperature for approximately 24 hours. The prepared electrochromic component is a gel-type film with a thickness of about 0.5 mm.

[0090] Example 2 (D8P1): Electrochromic components were prepared in the same manner as in Example 1, except that 0.3545g of PVC, 2.8358g of DBA, 0.2954g of PC and 0.4254g of EMIM-TFSI were used.

[0091] Comparative Example 1 (D9P0): The electrochromic component was prepared in the same manner as in Example 1, except that 0.3517 g of PVC, 3.1653 g of DBA and 0.4220 g of EMIM-TFSI were used and no PC was added.

[0092] Comparative Example 2 (D7.5P1.5): Electrochromic components were prepared in the same manner as in Example 1, except that 0.3559 g of PVC, 2.6691 g of DBA, 0.4448 g of PC and 0.4271 g of EMIM-TFSI were used.

[0093] Experimental Example: Measurement of Ionic Conductivity

[0094] The electrochromic components of Examples 1 and 2, as well as Comparative Examples 1 and 2, were each cut to a size of 10 mm × 10 mm, then placed on Pt-plated electrodes, and subsequently covered with Pt-plated electrodes. The distance between the electrodes was 0.3 mm. Using a potentiostat (Biologics, SP240), the electrochromic components were measured at 10... 5 -10 -1 Ionic conductivity was measured under conditions of Hz and 10mV AC. The measurement results are as follows: Figure 2 As shown.

[0095] Reference Figure 2 Example 2 exhibits the best ionic conductivity.

[0096] Experimental Example: Transmittance Measurement

[0097] The electrochromic components of Examples 1 and 2, as well as Comparative Examples 1 and 2, were each cut into 2cm × 2cm sizes, then placed on an ITO-PET electrode, and subsequently covered with an ITO-PET electrode to prepare an electrochromic device.

[0098] Using a UV-Vis spectrophotometer (Perkin Elmer, Lambda 465) and a potentiostat (Biologics, SP240), the UV-Vis spectra of the electrochromic devices of both the examples and comparative examples were measured at 607 nm, each set to 100% baseline. The measurement results are shown below. Figure 3 As shown.

[0099] Reference Figure 3 It can be seen that the transmittance of Example 2 changes the fastest, and therefore the color change speed is the best.

[0100] Experimental example: Calculation of color efficiency

[0101] The color efficiency of Examples 1, 2, and Comparative Example 1 was measured using the following formula, and the results are shown in Table 1 and... Figure 4As shown.

[0102] [formula]

[0103]

[0104] (η is color efficiency, ΔQ is the change in charge, ΔOD is the change in optical density under ΔQ, T) b T represents the transmittance in the decolorized state. c (This represents the transmittance in the colored state.)

[0105] [Table 1]

[0106]

[0107] Refer to Table 1 and Figure 4 It can be seen that the color efficiency of Example 2 is the best.

[0108] Example: Manufacturing of an electrochromic component according to another embodiment

[0109] Example 3 (D8P 0.75E 0.25): PVC was from Scientific Polymer Products, Inc., DBA was from TCI, PC was from Daejung Chemicals & Metals CO., LTD., EC was from Daejung Chemicals & Metals CO., LTD., EMIM-TFSI was from io-li-tec, dmFC was from TCI, and THF as solvent was from Daejung Chemicals & Metals CO., LTD. First, 0.2216 g of PC and 0.0738 g of EC were mixed at room temperature. 0.3545 g of PVC was dissolved in 25 mL of THF at room temperature by stirring, followed by the addition of 2.8358 g of DBA and stirring. A premixed mixture of PC and EC was added, along with 0.4254 g of EMIM-TFSI, 0.2483 g of DHV[TFSI]2, and 0.0581 g of dmFC, and the mixture was stirred at room temperature. The stirred mixture was poured into a Petri dish and dried at room temperature for approximately 24 hours. The prepared electrochromic device was a gel-type film with a thickness of approximately 0.5 mm.

[0110] Example 4 (D8P0.5E0.5): Electrochromic components were prepared in the same manner as in Example 1, except that 0.1477 g of PC and 0.1477 g of EC were added.

[0111] Example 5 (D8P0.25E0.75): Electrochromic components were prepared in the same manner as in Example 1, except that 0.0738 g of PC and 0.2216 g of EC were added.

[0112] Comparative Example 3 (D9P0E0): Electrochromic components were prepared in the same manner as in Example 1, except that 0.3517 g of PVC, 3.1653 g of DBA and 0.4220 g of EMIM-TFSI were added, and PC and EC were not added.

[0113] Comparative Example 4 (D8P1E0): Electrochromic components were prepared in the same manner as in Example 1, except that 0.2954 g of PC was added and no EC was added.

[0114] Experimental Example: Measurement of Ionic Conductivity

[0115] The electrochromic components of Examples 3 to 5, as well as Comparative Examples 3 and 4, were each cut into 10mm × 10mm pieces and then placed on Pt-plated electrodes, which were subsequently covered with Pt-plated electrodes. The distance between the electrodes was 0.3mm. Using a potentiostat (Biologics, SP240), the electrochromic components were measured at 10... 5 -10 -1 Ionic conductivity was measured under conditions of Hz and 10mV AC. The measurement results are as follows: Figure 5 As shown.

[0116] Reference Figure 5 Example 4 exhibits the best ionic conductivity.

[0117] Experimental Example: Transmittance Measurement

[0118] The electrochromic components of Examples 3 to 5, as well as Comparative Examples 3 and 4, were each cut into 2cm × 2cm sizes, then placed on an ITO-PET electrode, and subsequently covered with an ITO-PET electrode to prepare an electrochromic device.

[0119] Using a UV-Vis spectrophotometer (Perkin Elmer, Lambda 465) and a potentiostat (Biologics, SP240), the UV-Vis spectra of the electrochromic devices of both the examples and comparative examples were measured at 607 nm, each set to 100% baseline. The measurement results are shown below. Figure 7 As shown.

[0120] Reference Figure 7 It can be seen that the transmittance of Example 4 changes the fastest, and therefore the color change speed is the best.

[0121] Experimental example: Calculation of color efficiency

[0122] The color efficiency of Examples 3 to 5, Comparative Examples 3 and 4 was measured using the above calculation formula, and the results are shown in Table 2 and... Figure 8 As shown.

[0123] [Table 2]

[0124]

[0125] Refer to Table 2 and Figure 8 It can be seen that the color efficiency of Example 4 is the best.

[0126] This invention is not limited to the above-described embodiments and drawings, but is limited by the appended claims. Therefore, those skilled in the art can make various substitutions, modifications, and alterations without departing from the technical concept of the invention as described in the claims, and these are also considered to fall within the scope of the invention.

Claims

1. An electrochromic device composition, said composition comprising: Polymer resin; Color-changing materials; and Plasticizer, in, The plasticizer comprises a primary plasticizer and propylene carbonate (PC), or comprises a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

2. The electrochromic device composition as described in claim 1, in, When the plasticizer comprises a primary plasticizer and propylene carbonate, the propylene carbonate is contained in an amount of about 3 wt% to 11 wt% based on the weight of the primary plasticizer.

3. The electrochromic device composition as described in claim 1, in, When the plasticizer comprises a primary plasticizer, propylene carbonate, and ethylene carbonate, the propylene carbonate is included in an amount of about 2 wt% to 8 wt% based on the weight of the primary plasticizer, and Based on the weight of the primary plasticizer, the ethylene carbonate is contained in an amount of about 2 wt% to 8 wt%.

4. The electrochromic device composition as described in claim 1, in, When the plasticizer comprises a primary plasticizer and propylene carbonate, the propylene carbonate is contained in an amount of about 35 wt% to 85 wt% based on the weight of the polymer resin.

5. The electrochromic device composition as described in claim 1, in, When the plasticizer comprises a primary plasticizer, propylene carbonate, and ethylene carbonate, the propylene carbonate is contained in an amount of about 25 wt% to 75 wt% based on the weight of the polymer resin, and Based on the weight of the polymer resin, the ethylene carbonate is contained in an amount of about 25 wt% to 75 wt%.

6. The electrochromic device composition as described in claim 1, in, When the plasticizer comprises a primary plasticizer, propylene carbonate, and ethylene carbonate, the weight ratio of propylene carbonate to ethylene carbonate is approximately 3:1 to 1:

3.

7. The electrochromic device composition of claim 1, wherein, The main plasticizer is dibutyl adipate (DBA).

8. A method for manufacturing an electrochromic component, the method comprising: The polymer resin is dissolved in a solvent to prepare a mixture; Add plasticizer to the mixture; as well as Add a color-changing material to the mixture. The plasticizer comprises a primary plasticizer and propylene carbonate (PC), or comprises a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

9. An electrochromic device, said electrochromic device comprising an electrochromic device layer, in, The electrochromic device layer is prepared by drying an electrochromic device composition comprising a polymer resin, a color-changing material, and a plasticizer. The plasticizer comprises a primary plasticizer and propylene carbonate (PC), or comprises a primary plasticizer, propylene carbonate (PC), and ethylene carbonate (EC).

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