KR102171371B1 - A method of manufacturing an Ag nanowire embedded transparent electrode and transparent electrode thereby - Google Patents

Abstract

A method of manufacturing a silver nanowire transparent electrode and a silver nanowire transparent electrode thereby are provided.
In the method of manufacturing a silver nanowire transparent electrode according to an embodiment of the present invention, a polymer layer is formed by applying a polymer on a release paper film supplied at a predetermined rate, and at least the surface is softened to a gel state by softening. And forming a silver nanowire on the polymer layer, and fixing the silver nanowire to the softened polymer layer.

Description

TECHNICAL FIELD A method of manufacturing an Ag nanowire embedded transparent electrode and transparent electrode thereby

The present invention relates to a method of manufacturing a silver nanowire transparent electrode and a transparent electrode therefrom, and more particularly, to meet light transmittance, electrical conductivity, bending stability, and oxidation stability, and a silver nanowire substrate by a simple consistent process. The present invention relates to a method of manufacturing a silver nanowire transparent electrode capable of mass production by being firmly fixed to and to a transparent electrode thereby.

Due to the remarkable development of the IT industry in recent years, the demand for the second generation of flexible electronic devices has rapidly increased beyond the first generation of flat electronic devices such as flexible displays, OLEDs, touch screens, and wearable devices. have. This technological trend is naturally leading to an increase in interest in flexible transparent electrode technology, which is a key component of flexible electronic devices.

Currently, the most widely used conductive material for transparent electrodes is ITO (Indium Tin Oxide), which has a transmittance of 80% or more and a resistance of 10 to 100 Ω/Sqm. However, due to the scarcity of indium materials, the high price that changes fluidly and the sudden decrease in conductivity due to cracks when bent limit the use of ITO in flexible devices. In addition, high-quality ITO film production should include a high-temperature (~200°C) sputtering or chemical vapor deposition process. The process including such high-temperature heat treatment may cause damage and deformation of the flexible film mainly made of plastic having a low glass transition temperature (Tg) as a substrate, which limits the use of ITO in manufacturing a flexible substrate.

Therefore, as a transparent electrode material replacing ITO, alternatives such as transparent metal oxide, carbon nanotube (CNT), conductive polymer, and graphene have been proposed. However, these alternative materials do not meet all requirements such as high transparency, high conductivity, uniform conductivity, and high adhesion to the substrate.

Initially, the method of manufacturing a silver nanowire transparent electrode is a bar coater or slot-die coater on the transparent film while supplying a transparent film wound on a roll, for example, a PET (PolyEthylene Terephthalate) film at a constant speed. ), etc., and then using a pressing roller to pressurize the transparent film coated with the silver nanowire. In this method, a transparent electrode can be quickly and in large quantities manufactured by a relatively simple process, but since the silver nanowire is not firmly fixed to the transparent film, the silver nanowire easily flows on the transparent film even with a small external force (disturbance). ，There is a problem in that the stability is lowered and the distribution becomes irregular.

As a way to solve this problem, a method of compressing with a pressure roller in a state where an adhesive is applied on a transparent film coated with silver nanowires has been proposed. According to this method, the above-described stability problem is solved, but the adhesive deteriorates the properties of the transparent film, and thus the oxidation stability problem is not solved.

In other words, research to satisfy all of the light transmittance, electrical conductivity, bending stability and oxidation stability required in forming silver nanowires on a transparent film is being attempted continuously.

The technical task to be achieved by the present invention is a silver nanowire transparent electrode that can be mass-produced by satisfying light transmittance, electrical conductivity, bending stability, and oxidation stability, while allowing the silver nanowire to be firmly fixed to the substrate through a simple and consistent process. It is to provide a method of manufacturing and a transparent electrode thereby.

The object of the present invention is not limited to the object mentioned above, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention for achieving the above technical problem, a method of manufacturing a silver nanowire transparent electrode includes forming a polymer layer by applying a polymer on a release paper film supplied at a predetermined rate, and at least a surface by softening. And forming silver nanowires on the polymer layer softened in a gel state, and fixing the silver nanowires to the softened polymer layer.

In another embodiment, the polymer has a viscosity of 900 to 1000 cps, and the polymer layer may be formed to have a thickness of 1 μm to 5 μm.

In another embodiment, the fixing of the silver nanowires to the polymer layer may be formed such that the silver nanowires are exposed to at least the surface of the polymer layer or impregnated within a range of 50 nm from the surface.

In another embodiment, the forming of the silver nanowire includes applying a solution containing the silver nanowire on the polymer layer, and spraying a softener on the polymer layer to which the solution containing the silver nanowire is applied. It may include softening the polymer layer.

Here, the softener is N-dimethylacetamide (DMAc), N,Ndimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), m-cresol, methanol, ethanol, propanol, butanol, methyl ethyl ketone (Methyl Ethyl Ketone; MEK), pentanol, hexanol, ethaneol, ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, acetone, and at least one of isopropanol.

In addition, the softener may have a molecular weight of 65 to 80, and the softener may be sprayed onto the polymer layer at an injection amount of 0.5 to 1.5 ml/min.

In addition, the fixing of the silver nanowire to the softened polymer layer includes pressing the silver nanowire on the softened polymer layer, and drying the polymer layer in which the silver nanowire is embedded by the pressing It may include.

In another embodiment, in the forming of the silver nanowire, coating the silver nanowire on the polymer layer while softening the polymer layer by applying a solution containing the silver nanowire and a softening accelerator on the polymer layer. , The softening accelerator may have a molecular weight of 65 or less while containing a CH group and an OH group.

According to another aspect of the present invention for achieving the above technical problem, the silver nanowire transparent electrode is a silver nanowire embedded in a flexible polymer layer having light transmission properties, and the silver nanowire is embedded by softening of the polymer layer. And a chemical layer having a molecular weight of 65 to 80 while remaining on at least the surface of the polymer layer.

Details of other embodiments are included in the detailed description and drawings.

According to the present invention, while meeting light transmittance, electrical conductivity, bending stability, and oxidation stability, mass production can be realized by allowing the silver nanowires to be firmly fixed to the substrate by a simple and consistent process.

1 and 2 are diagrams illustrating a flow chart and a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to an embodiment of the present invention, respectively.
3 is a view showing a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to another embodiment of the present invention.
4 is a view showing a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to another embodiment of the present invention.
5A and 5B are SEM images of a transparent electrode of a silver nanowire manufactured according to an embodiment of the present invention.
6 is an SEM image of a transparent electrode of silver nanowires manufactured by a conventional method.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings and the following description. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art. The same reference numbers throughout the specification denote the same elements.

Meanwhile, terms used in the present specification are for explaining embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. In addition, the expression of the positional relationship used in the specification, such as the upper, lower, left, right, etc., is described for convenience of description, and when the drawings shown in this specification are viewed in reverse, the positional relationship described in the specification is interpreted in the opposite direction It could be.

As used herein, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, action and/or element is Or does not exclude additions.

In addition, in the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Also, the size of each component does not fully reflect the actual size.

Hereinafter, a method of manufacturing a silver nanowire transparent electrode according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. 1 and 2 are diagrams illustrating a flow chart and a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to an embodiment of the present invention, respectively.

1 and 2, the release paper film 102 is supplied to the work target at a predetermined speed (S105).

The release paper film 102 may be a PET (PolyEthylene Terephthalate) film as a film that is easily detachable with a polymer to be described later. It can be recovered by roll (not shown).

Next, a polymer used as a substrate for fixing the silver nanowire 106 is applied on the release paper film 102 (S110).

The polymer is a light-transmitting and flexible polymer compound when cured, for example, at least one of polyester, polystyrene, polyimide, polycarbonate, polyurethane, polymethyl methacrylate, and polyolefin may be used.

The polymer may be formed to have a thickness of 1 μm to 5 μm in consideration of the rigidity, light transmittance, and thickness of the silver nanowire of the substrate. If the polymer is formed to a thickness of less than 1 μm, not only does the formation of the polymer smoothly occur. The rigidity of the substrate is significantly lowered. When the polymer is formed to have a thickness greater than 5 μm, the light transmittance of the transparent electrode as a substrate is lowered, resulting in poor optical properties.

As the polymer, a compound having a viscosity of 900 to 1000 cps among the listed polymer compounds may be used. When the polymer has a viscosity lower than 900 cps, it may not be formed well at the lower limit thickness of the polymer due to excessive flowability, and when the polymer has a viscosity higher than 1000 cps, light transmittance may be poor.

The polymer may be sprayed using a bar coater or a slot die coater, and the spraying speed of the polymer may be determined according to the aforementioned thickness range.

Subsequently, the polymer layer 104 is formed by performing a curing process on the polymer on the release paper film 102 (S115).

The curing process may be UV curing or a heat curing method of 50 to 200°C.

Next, the solution 108 containing the silver nanowire 106 is applied on the polymer layer 104 to form the silver nanowire 106 (S120).

Solution 108, for example, in addition to the silver nanowire 106, polyvinylpyrrolidone (PVP) having a molecular weight of 330,000 to 390,000 using ethylene glycol as a solvent, a material containing chloride ions as a stabilizer of a predetermined amount, and a predetermined capacity It may include a substance containing bromide ions as a growth regulator of.

Chloride ions contribute to promoting the crystallization of silver while preventing oxidation of silver crystals during the synthesis of the solution 108 containing the silver nanowires 106, while bromide ions suppress excessive crystal growth in the lateral direction of silver during synthesis. Promotes longitudinal growth.

Subsequently, in order to suppress the fluidity of the solution 108 of the silver nanowire 106, the solution 108 is dried at a predetermined temperature (S125).

Next, by spraying a softener on the polymer layer 104 to which the dried solution 108 is applied to soften the polymer layer 104, the softening layer 110 is formed on the polymer layer 104 to form the polymer layer 104 ) At least the surface is softened to a gel state (S130).

The softening layer 110 may be formed to such an extent that silver nanowires may be impregnated. Accordingly, the silver nanowire 106 is formed on the softened polymer layer 104, and the silver nanowire 106 is formed by floating on the polymer layer 104 or partially penetrating from the surface of the polymer layer 104 to the inside. It could be.

Softeners are, for example, N-dimethylacetamide (DMAc), N,Ndimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), m-cresol, methanol, ethanol, propanol, butanol, methyl ethyl ketone (Methyl Ethyl Ketone). ; MEK), pentanol, hexanol, ethaneol, ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, acetone, and at least any one or more of isopropanol.

The softener may be a material having a molecular weight of 65 to 80 among the above-described compounds. If the molecular weight of the softener is less than 65, the polymer layer 104 is excessively softened, so that the silver nanowire 106 does not remain satisfactorily on the polymer layer 104, or the silver nanowire 106 is a polymer layer in a process such as subsequent pressurization. (104) may be impregnated excessively deeply. According to this, the silver nanowire 106 is impregnated to an excessive internal depth, so that the electrical conductivity is significantly lowered. In addition, when the molecular weight exceeds 80, the softening reaction with the polymer layer 104 does not occur actively.

The softener may be sprayed over the entire length of the polymer layer 104 by a bar coater or a slot die coater, and may be sprayed onto the polymer layer 104 at an injection amount of 0.5 to 1.5 ml/min. If the injection amount of the softener is less than 0.5 ml/min, the softening of the polymer layer 104 is poor. If the spraying amount exceeds 1.5 ml/min, overflow and excessive softening of the softener and/or the polymer layer 104 occur, so that the silver nanowire 106 does not remain satisfactorily on the polymer layer 104 or the silver nanowire 106 may be excessively deeply impregnated into the polymer layer 104 in a subsequent process such as pressing. According to this, electrical conductivity may be significantly lowered.

Subsequently, the silver nanowires 106 immersed in the softening layer 110 are pressed (S135).

This pressing may be performed by a device such as a roll press, and the silver nanowires 106 on the polymer layer 104 are impregnated to a predetermined depth within the softened polymer layer 104.

In this case, a pressing process may be performed so that the impregnation depth of the silver nanowire 106 is set to 50 nm or less from the surface. If the depth of impregnation exceeds 50 nm, electrical conductivity may be lowered, resulting in poor electrical properties as an electrode.

Subsequently, a part of the softening layer 110a is removed by drying the polymer layer 104 in which the silver nanowire 106 is embedded, and the silver nanowire 106 is firmly fixed inside the polymer layer 104 (S140). .

The softening layer 110a remaining on the polymer layer 104 may have a component and molecular weight of the aforementioned softening agent. A part of the solution 108 containing the silver nanowire 106 may also remain, in this case, PVP having a molecular weight of 330,000 to 390,000 and remaining in 0.5 to 1% by weight, containing 0.5 to 1% by weight of chloride ions A substance, a substance containing 0.5 to 1% by weight of brominated ions, and the like.

In the present embodiment, since the silver nanowire 106 is embedded in the polymer layer 104, oxidation protection can be realized, and the surface roughness of the transparent electrode can be improved. In addition, since the silver nanowire 106 is embedded, the bending stability is also improved. In addition, the silver nanowire 106 is impregnated to 50 nm or less from the surface of the polymer layer 104 to ensure electrical conductivity, as well as excellent light transmittance by meeting the thickness range of the polymer layer 104 and the molecular weight range of the softener. Do.

In addition, according to the manufacturing method according to the present embodiment, mass production is possible by allowing the silver nanowires to be firmly fixed to the substrate through a simple and consistent process.

Hereinafter, a method of manufacturing a silver nanowire transparent electrode according to another embodiment of the present invention will be described with reference to FIG. 3. 3 is a view showing a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to another embodiment of the present invention. In this embodiment, the processes of S125 and S135 are omitted in the embodiments of FIGS. 1 and 2, and in order to further improve the electrical conductivity, silver nanowires 106 are formed on the surface of the polymer layer 104 or the polymer This is an example that is formed to be partially embedded in the layer 104. The following description will be mainly described in terms of differences from FIGS. 1 and 2, and substantially the same matters will be omitted.

As shown in steps S105 of FIGS. 1 and 2, the release paper film 102 is supplied to the work target at a predetermined speed. The detailed description is substantially the same as step S105.

Next, a polymer used as a substrate for fixing the silver nanowires 106 is applied on the release paper film 102.

The physical properties of the polymer, the detailed type, thickness, viscosity, and process progress of the polymer compound are substantially the same as in step S110 of FIG. 1.

Subsequently, a curing process is performed on the polymer on the release paper film 102 to form the polymer layer 104.

Next, a solution 108 containing silver nanowires 106 is applied on the polymer layer 104 to form silver nanowires 106. Here, the components contained in the solution 108 are substantially the same as in step S120 of FIG. 1.

Next, the softening layer 110 is formed on the polymer layer 104 by spraying a softener on the polymer layer 104 to which the solution 108 is applied to which the drying process is not applied to soften the polymer layer 104 At least the surface of the polymer layer 104 is softened to a gel state.

The softening layer 110 may be formed to such an extent that silver nanowires may be impregnated. Accordingly, the silver nanowire 106 is formed on the softened polymer layer 104, and the silver nanowire 106 is formed by floating on the polymer layer 104 or partially penetrating from the surface of the polymer layer 104 to the inside. It could be.

Since the compound component, molecular weight, and injection amount of the softener are substantially the same as in step S130 of FIG. 1, detailed descriptions are omitted.

Subsequently, by drying the polymer layer 104 in which at least part of the silver nanowire 106 is exposed on the surface, a part of the softening layer 110a is removed, while the silver nanowire 106 is firmly fixed to the polymer layer 104 Let it.

According to the present embodiment, by omitting the pressing process of step S135 of FIG. 1, since the silver nanowire 106 is formed by exposing at least a portion of the surface of the polymer layer 104, electrical conductivity may be further improved. Since a part of the softening layer 110 may be formed to be fixed so as to surround the silver nanowire 106, oxidation prevention properties and bending stability are also improved. The light transmittance is also excellent by satisfying the thickness range of the polymer layer 104 and the molecular weight range of the softener.

In addition, according to the manufacturing method according to the present embodiment, mass production is possible by allowing the silver nanowires to be firmly fixed to the substrate through a simple and consistent process.

In the embodiments of FIGS. 1 to 3, after applying the solution 108 containing the silver nanowires 106 on the polymer layer 104, it was mainly described that a softener is sprayed on the polymer layer 104. As a result, if silver nanowires can be formed on the polymer layer, at least whose surface is softened in a gel state, after softening the polymer layer 104 by spraying a softener, silver nanowires 106 or the like may be applied.

Hereinafter, a transparent electrode manufactured according to the exemplary embodiment of FIGS. 1 to 3 will be described.

The transparent electrode is a chemical that remains on at least the surface of the polymer layer 104 when the silver nanowires 106 embedded in the light-transmitting flexible polymer layer 104 and the silver nanowires are embedded by the softening of the polymer layer 104. Layer (softening layer; 110a). The softening layer 110 may remain in a dried form of the compound according to the embodiments of FIGS. 1 to 3, and in addition, in order to satisfy the smooth softening and various characteristics of the polymer layer 104, a molecular weight of 65 to 80 It may be composed of a compound having.

In addition, a part of the solution 108 containing the silver nanowire 106 may also remain in at least one of the polymer layer 104 and the softening layer 110, and in this case, it has a molecular weight of 330,000 to 390,000 and has a molecular weight of 0.5 to PVP remaining at 1% by weight, 0.5 to 1% by weight of a chloride ion-containing material, 0.5 to 1% by weight of a bromide ion-containing material, and the like may be included.

Hereinafter, a method of manufacturing a silver nanowire transparent electrode according to still another embodiment of the present invention will be described with reference to FIG. 4. 4 is a view showing a schematic process for explaining a method of manufacturing a transparent silver nanowire electrode according to another embodiment of the present invention. In the present embodiment, the processes of S125 and S130 are omitted in the embodiments of FIGS. 1 and 2, and the polymer layer using a softening accelerator included in the solution 108 containing silver nanowires 106 is not used as a softener. 104) is weakly softened. The following description will be mainly described in terms of differences from FIGS. 1 and 2, and substantially the same matters will be omitted.

As shown in steps S105 of FIGS. 1 and 2, the release paper film 102 is supplied to the work target at a predetermined speed. The detailed description is substantially the same as step S105.

Next, a polymer used as a substrate for fixing the silver nanowires 106 is applied on the release paper film 102. The physical properties of the polymer, the detailed type, thickness, viscosity, and process progress of the polymer compound are substantially the same as in step S110 of FIG. 1.

Subsequently, a curing process is performed on the polymer on the release paper film 102 to form the polymer layer 104.

Next, by applying a solution 108a containing the silver nanowire 106 and a softening accelerator on the polymer layer 104 to soften the polymer layer 104, the silver nanowire ( 106). The softening accelerator may have a component similar to that of the softening agent described in FIGS. 1 to 3, and may have a molecular weight of 65 or less while containing a CH group and an OH group to promote softening. For example, the softening accelerator may be ethanol or the like.

Here, the solution 108a is, for example, polyvinylpyrrolidone (PVP) having a molecular weight of 330,000 to 390,000 using ethylene glycol as a solvent in addition to the silver nanowire 106 and the softening accelerator, and containing chloride ions as a stabilizer of a predetermined dose. Substances, substances containing bromide ions as a growth regulator in a predetermined amount, and the like may be included.

Subsequently, the silver nanowires 106 present on the polymer layer 104 softened by the softening accelerator are pressed.

This pressing may be performed by a device such as a roll press, and the silver nanowires 106 on the polymer layer 104 are impregnated to a predetermined depth within the softened polymer layer 104.

In this case, a pressing process may be performed such that the impregnation depth of the silver nanowire 106 is set to 50 nm or less from the surface, but the impregnation depth may be smaller than that of the embodiments of FIGS. 1 and 2.

Subsequently, by drying the polymer layer 104 in which the silver nanowires 106 are embedded, at least a part of the solution 108a, components, etc. are removed, and the silver nanowires 106 are firmly fixed inside the polymer layer 104 Let it.

Here, a part of the solution 108a containing the silver nanowire 106 may also remain, in this case, PVP having a molecular weight of 330,000 to 390,000 and remaining in 0.5 to 1% by weight, 0.5 to 1% by weight of chlorination It may contain an ion-containing material, 0.5 to 1% by weight of a brominated ion-containing material, a softening accelerator, and the like.

According to the present embodiment, by omitting the step S130 of FIG. 1, the spraying process of the softener, the process may be further simplified than the embodiments of FIGS. 1 to 3. Since the silver nanowire 106 is embedded in the polymer layer 104, oxidation resistance and bending stability are improved, and the surface roughness of the transparent electrode is improved. In addition, silver nanowires are properly impregnated from the surface of the polymer layer 104 to ensure electrical conductivity, as well as excellent light transmittance by satisfying the thickness range of the polymer layer 104.

5A and 5B are SEM images of a transparent electrode of a silver nanowire manufactured according to an embodiment of the present invention, and FIG. 6 is an SEM image of a transparent electrode of a silver nanowire manufactured by a conventional method.

The transparent electrode of the silver nanowire shown in FIGS. 5A and 5B was manufactured as follows according to an exemplary embodiment of the present invention.

A polymer layer was formed by applying a polymer on a release paper film formed of PET, and the polymer was a compound having a viscosity of 900 to 1000 cps, and was used as the compound described in FIG. 2. Subsequently, a solution containing silver nanowires was applied on the polymer layer to form silver nanowires, and the solution was polyvinylphytolidone using ethylene glycol as a solvent, as well as a material containing chloride ions as a stabilizer, and as a growth regulator. A material containing bromide ions was included. Next, after drying the solution, a softener was sprayed on the polymer layer to which the solution was applied so as to be impregnated with silver nanowires to soften the polymer layer, and the softening layer softened at least the surface of the polymer layer to a gel state. The softener was used as the compound described in FIG. 2 while having a molecular weight of 65 to 80. Subsequently, by pressing against the silver nanowires immersed in the softening layer, the silver nanowires were impregnated to a depth of 50 nm or less from the surface. A part of the softening layer was removed by drying the polymer layer embedded with silver nanowires, and the silver nanowires were made to be impregnated into the polymer layer.

The transparent electrode of the silver nanowire shown in FIG. 6 was manufactured as follows by a conventional method.

A polymer layer was formed by applying a polymer on a release paper film formed of PET, and the polymer was a compound having a viscosity of 900 to 1000 cps, and was used as the compound described in FIG. 2. Subsequently, the solution containing the silver nanowires was coated on the polymer layer, and the polymer layer to which the solution was applied was cured at a high temperature, and pressure was applied to fix the silver nanowires on the polymer layer. According to the conventional method, the silver nanowires are not impregnated on the polymer layer, and the silver nanowires are exposed on the polymer layer to form a network.

5A is an image when a transparent electrode of silver nanowire is viewed vertically from top to bottom, and FIG. 5B is an image when a transparent electrode is viewed from top to bottom at an angle of 45 degrees.

5A and 5B, the silver nanowire according to the present embodiment is impregnated in the polymer layer, and further, at the intersection point of the network-type silver nanowire, the upper silver nanowire as viewed from the pressing direction is compared to the lower silver nanowire. It can be seen that it is in contact with certainty in a curved form.

On the other hand, as shown in FIG. 6, the silver nanowires according to the conventional method are formed on the polymer layer so as to be exposed to the outside, and a portion where contact between the silver nanowires is not possible was found at the intersection point.

Unlike the conventional method in which the silver nanowire is exposed, in this embodiment, since the silver nanowire is impregnated in the polymer layer, it can be seen that it is superior to the prior art in terms of oxidation resistance, bending stability, and degree of surface roughness.

In addition, the conventional silver nanowire may have a higher electrical conductivity than the present embodiment because it is exposed to the outside, but in the case where the silver nanowire of the present embodiment and the prior art have the same electrical conductivity in the transparent electrode of the same area, this embodiment is It has remarkably high light transmittance. Accordingly, the transparent electrode of the silver nanowire according to the present exemplary embodiment can satisfy all electrical characteristics and light transmission characteristics.

Although the present invention has been described in detail through exemplary embodiments above, a person of ordinary skill in the art to which the present invention pertains will realize that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. I will understand. Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should be determined by all changes or modifications derived from the claims and the concept of equality as well as the claims to be described later.

102: release paper film 104: polymer layer
106: silver nanowire 108: solution
110: softening layer

Claims (10)

Forming a polymer layer by applying a polymer on a release paper film supplied at a predetermined rate;
Forming a silver nanowire on the polymer layer whose surface is softened to at least a gel state by softening; And
Including the step of fixing the silver nanowire to the softened polymer layer,
The step of forming the silver nanowire,
Applying a solution containing the silver nanowires on the polymer layer; And
Including the step of softening the polymer layer by spraying a softener on the polymer layer to which the silver nanowire-containing solution is applied,
The softener is a method of manufacturing a silver nanowire transparent electrode having a molecular weight of 65 to 80. The method of claim 1,
The polymer has a viscosity of 900 to 1000 cps, the polymer layer is formed to have a thickness of 1 μm to 5 μm, a method of manufacturing a transparent silver nanowire electrode. The method of claim 1,
In the step of fixing the silver nanowire to the polymer layer, the silver nanowire is formed to be exposed to at least a surface of the polymer layer or to be impregnated within a range of 50 nm from the surface of the polymer layer. delete delete delete The method of claim 1,
The method of manufacturing a silver nanowire transparent electrode in which the softener is sprayed on the polymer layer at an injection amount of 0.5 to 1.5 ml/min. The method of claim 1,
The step of fixing the silver nanowire to the softened polymer layer,
Pressing the silver nanowires on the softened polymer layer; And
A method of manufacturing a silver nanowire transparent electrode comprising the step of drying the polymer layer in which the silver nanowire is embedded by the pressing. delete Silver nanowires embedded in a flexible polymer layer having light transmittance; And
Silver nanowire transparent electrode comprising a chemical layer having a molecular weight of 65 to 80 while remaining on at least the surface of the polymer layer when the silver nanowire is embedded by the softening of the polymer layer.

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