KR20200054635A - A method of manufacturing an Ag nanowire embedded transparent electrode and transparent electrode thereby - Google Patents

Abstract

Provided are a method of manufacturing a silver nanowire transparent electrode and a silver nanowire transparent electrode thereby. According to an embodiment of the present invention, the method of manufacturing a silver nanowire transparent electrode comprises the steps of: forming a polymer layer by applying a polymer onto a release paper film supplied at a predetermined speed; forming a silver nanowire on the polymer layer whose surface is at least softened to a gel state by softening; and fixing the silver nanowire to the softened polymer layer.

Description

A method of manufacturing a silver nanowire transparent electrode and thereby a silver nanowire transparent electrode.

The present invention relates to a method of manufacturing a silver nanowire transparent electrode and a transparent electrode thereby, more specifically, while satisfying light transmittance, electrical conductivity, bending stability and oxidation stability, the silver nanowire is a substrate by a simple and consistent process. It relates to a method of manufacturing a silver nanowire transparent electrode capable of mass production by being able to be securely fixed to the transparent electrode.

Due to the recent development of the IT industry, the demand for flexible type 2nd generation electronic devices has rapidly increased over flat 1st generation 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 core 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 the indium material, the high price that changes flexibly and the sharp decrease in conductivity due to cracking when bent limit the use of ITO in flexible devices. In addition, high quality ITO film production should include high temperature (~ 200 ℃) sputtering or chemical vapor deposition process. The process including the high-temperature heat treatment may cause damage and deformation of a flexible plastic film mainly having a low glass transition temperature (Tg) as a substrate, which is a limitation of the use of ITO in manufacturing a flexible substrate.

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

The initial method of manufacturing a silver nanowire transparent electrode is a bar coater or a slot-die coater on a transparent film while supplying a transparent film wound on a roll, for example, a PET (PolyEthylene Terephthalate) film at a constant speed. ) Is coated by a method such as silver nanowires, and pressurized rollers are used to press the silver nanowires onto the coated transparent film. This method can produce a transparent electrode quickly and in a large amount by a relatively simple process, whereas the silver nanowires are easily flowed on the transparent film even with a small external force (disturbance) because the silver nanowires are not firmly fixed to the transparent film. ， There was a problem that the stability is lowered and the distribution is irregular.

As one way to solve this problem, a method of pressing with a pressure roller in a state in which 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 lowers the properties of the transparent film, so that the oxidation stability problem is not solved.

That is, research to satisfy all of the light transmittance, electrical conductivity, bending stability, and oxidation stability required for forming a silver nanowire on a transparent film has been continuously attempted.

Technical problem to be achieved by the present invention is to meet the light transmittance, electrical conductivity, bending stability and oxidative stability, as well as a simple and consistent process to enable the silver nanowires to be securely fixed to the substrate, a silver nanowire transparent electrode capable of mass production It is to provide a manufacturing method and a transparent electrode thereby.

The objects of the present invention are not limited to the objects mentioned above, and other objects 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 applying a polymer on a release paper film supplied at a predetermined speed to form a polymer layer, and at least a surface is softened by softening. And forming a silver nanowire on the polymer layer softened to a gel state, and fixing the silver nanowire to the softened polymer layer.

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

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

In another embodiment, the step of forming the silver nanowires comprises: applying a solution containing the silver nanowires on the polymer layer, and spraying a softener on the polymer layer coated with the silver nanowire-containing solution. And 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, ethanediol, ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, acetone and isopropanol.

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

In addition, the step of fixing the silver nanowires to the softened polymer layer may include pressing the silver nanowires on the softened polymer layer, and drying the polymer layer in which the silver nanowires are embedded by the pressing. It may include.

In another embodiment, the step of forming the silver nanowires is by applying a solution containing the silver nanowires and a softening accelerator on the polymer layer, coating the silver nanowires on the polymer layer while softening 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 transmittance, and when the silver nanowire is embedded by softening of the polymer layer In addition to remaining on at least the surface of the polymer layer and includes a chemical layer having a molecular weight of 65 to 80.

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

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

1 and 2 are views illustrating a flowchart and a schematic process for explaining a method of manufacturing a silver nanowire transparent 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 silver nanowire transparent electrode according to another embodiment of the present invention.
4 is a diagram illustrating a schematic process for explaining a method of manufacturing a silver nanowire transparent electrode according to another embodiment of the present invention.
5A and 5B are SEM images of transparent electrodes of silver nanowires manufactured according to an embodiment of the present invention.
6 is a SEM image of a transparent electrode of silver nanowires produced by a conventional method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described below. 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 to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art. Throughout the specification, the same reference numbers refer to the same components.

Meanwhile, the terms used in the present specification are for explaining the embodiments and are not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. In addition, the expression of the positional relationship used in the specification, for example, upper, lower, left, right, etc. is described for convenience of description, and when viewing the drawings shown in the specification in reverse, the positional relationship described in the specification is interpreted in reverse It may be.

As used herein, "comprises" and / or "comprising" refers to the presence of one or more other components, steps, operations and / or elements in which the mentioned component, step, operation and / or element is present. Or do 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 explanation. Also, the size of each component does not entirely 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 views illustrating a flowchart and a schematic process for explaining a method of manufacturing a silver nanowire transparent electrode according to an embodiment of the present invention, respectively.

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

The release paper film 102 may be a polymer (PolyEthylene Terephthalate) film that is easily detachable from the polymer to be described later, and the release paper film 102 is supplied on a worktable while being unwound at a predetermined speed from a supply roll, and is wound on the other end. It can be recovered by a 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 stiffness, light transmittance, and silver nanowire thickness of the substrate. When the polymer is formed to a thickness smaller than 1 μm, not only does the polymer not form smoothly. The rigidity of the substrate is significantly reduced. When the polymer is formed to a thickness greater than 5 μm, the light transmittance of the transparent electrode as a substrate decreases, resulting in poor optical properties.

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

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

Subsequently, a curing process is performed on the polymer on the release paper film 102 to form the polymer layer 104 (S115).

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

Next, the silver nanowire 106 is formed by applying a solution 108 containing the silver nanowire 106 on the polymer layer 104 (S120).

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

Chloride ions contribute to promoting crystallization of silver while preventing oxidation of silver crystals when synthesizing solution 108 containing silver nanowires 106, while bromide ions inhibit excessive crystal growth in the lateral direction of silver during synthesis Promote 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 softening the polymer layer 104 by spraying a softener on the polymer layer 104 coated with the dried solution 108, 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 the extent that silver nanowires can be impregnated. Accordingly, the silver nanowire 106 is formed on the softened polymer layer 104, and the silver nanowire 106 is formed on the polymer layer 104 or partially penetrated from the surface of the polymer layer 104 to the inside. It may be.

Softeners include, for example, N-dimethylacetamide (DMAc), N, Ndimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), m-cresol, methanol, ethanol, propanol, butanol, methyl ethyl ketone ; MEK), pentanol, hexanol, ethanediol, ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, acetone and isopropanol.

The emollient may be a material having a molecular weight of 65 to 80 among the aforementioned compounds. When the molecular weight of the softening agent is less than 65, the polymer layer 104 is excessively softened, so that the silver nanowire 106 does not remain well on the polymer layer 104 or the silver nanowire 106 is subjected to a process such as subsequent pressurization. It may be excessively impregnated with 104. According to this, the silver nanowire 106 is impregnated with excessive internal depth, and the electrical conductivity is significantly reduced. In addition, when the molecular weight exceeds 80, a 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 injected into the polymer layer 104 at an injection amount of 0.5 to 1.5 ml / min. If the injection amount of the softening agent is less than 0.5 ml / min, softening of the polymer layer 104 becomes poor. When the injection amount exceeds 1.5 ml / min, overflow and excessive softening of the softener and / or the polymer layer 104 occur, and the silver nanowire 106 does not remain well on the polymer layer 104 or the silver nanowire 106 may be excessively impregnated into the polymer layer 104 in a subsequent pressurization process. According to this, electrical conductivity may be significantly reduced.

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

This pressurization can be performed with a device such as a roll press, and the silver nanowires 106 on the polymer layer 104 are impregnated to a predetermined depth in the softened polymer layer 104.

In this case, the 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. When the impregnation depth exceeds 50 nm, electrical conductivity may decrease, resulting in poor electrical properties as an electrode.

Subsequently, the polymer layer 104 in which the silver nanowire 106 is embedded is dried to remove a portion of the softening layer 110a 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 the components and molecular weight of the softener described above. Part of the solution 108 containing the silver nanowires 106 may also remain, in this case PVP having a molecular weight of 330,000 to 390,000 and remaining at 0.5 to 1% by weight, containing 0.5 to 1% by weight of chloride ions Materials, 0.5 to 1% by weight of brominated ion-containing materials, and the like.

In this embodiment, since the silver nanowire 106 is embedded inside the polymer layer 104, oxidation resistance can be realized, and surface roughness of the transparent electrode can be improved. In addition, since the silver nanowire 106 is embedded, bending stability is also improved. In addition to this, the silver nanowire 106 is impregnated below 50 nm from the surface of the polymer layer 104 to secure electrical conductivity, and also satisfies the thickness range of the polymer layer 104 and the molecular weight range of the softener to provide excellent light transmittance. Do.

In addition, according to the manufacturing method according to the present embodiment, mass production is possible by allowing the silver nanowires to be securely fixed to the substrate by 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 silver nanowire transparent 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 electrical conductivity, silver nanowires 106 are formed on the surface of the polymer layer 104, or polymer This is an example that is formed to be partially embedded in the layer 104. In the following description, points different from those in FIGS. 1 and 2 will be mainly described, and substantially the same items will be omitted.

As in step S105 of FIGS. 1 and 2, the release paper film 102 is supplied to a work object 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 nanowire 106 is applied on the release paper film 102.

The physical properties of the polymer, detailed types of polymer compounds, thickness, viscosity, process progress, etc. 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 containing component of the solution 108 is substantially the same as step S120 of FIG. 1.

Next, the softening layer 110 is formed on the polymer layer 104 by softening the polymer layer 104 by spraying a softening agent on the polymer layer 104 coated with the solution 108 that is not subjected to the drying process. At least the surface of the polymer layer 104 is softened to a gel state.

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

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

Subsequently, a portion of the softening layer 110a is removed by drying the polymer layer 104 exposing at least a portion of the silver nanowire 106 to the surface, and the silver nanowire 106 is firmly fixed to the polymer layer 104. Order.

According to this embodiment, by omitting the pressing process, which is the step S135 of FIG. 1, the silver nanowire 106 is formed by exposing at least a portion of the surface of the polymer layer 104, so that electrical conductivity can 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 resistance and bending stability are also improved. It satisfies the thickness range of the polymer layer 104 and the molecular weight range of the softener, and thus has excellent light transmission properties.

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

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

Hereinafter, a transparent electrode manufactured according to the 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 nanowire is embedded by softening the silver nanowire 106 and the polymer layer 104 embedded in the flexible polymer layer 104 having light transmissivity. Layer (softening layer; 110a). The softening layer 110 may remain in the dried form of the compounds according to the embodiments of FIGS. 1 to 3, in addition to the softening of the polymer layer 104, in order to meet various properties, 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, in this case, having a molecular weight of 330,000 to 390,000 and 0.5 to PVP remaining at 1% by weight, 0.5 to 1% by weight of chloride ion-containing material, 0.5 to 1% by weight of bromide ion-containing material, and the like.

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. 4. 4 is a diagram illustrating a schematic process for explaining a method of manufacturing a silver nanowire transparent electrode according to another embodiment of the present invention. In the present embodiment, the processes of S125 and S130 are omitted in the examples of FIGS. 1 and 2, and the polymer layer (using the softening accelerator included in the solution 108 containing the silver nanowire 106, not by the softener) ( 104) is an example of softening. In the following description, points different from those in FIGS. 1 and 2 will be mainly described, and substantially the same items will be omitted.

As in step S105 of FIGS. 1 and 2, the release paper film 102 is supplied to a work object 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 nanowire 106 is applied on the release paper film 102. The physical properties of the polymer, detailed types of polymer compounds, thickness, viscosity, process progress, etc. 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 a silver nanowire 106 and a softening accelerator on the polymer layer 104 to soften the polymer layer 104, the silver nanowire on the gel polymer layer 104 ( 106). The softening accelerator may have a component similar to the softening agent described in FIGS. 1 to 3, and may have a molecular weight of 65 or less in addition to containing a CH group and an OH group for promoting softening. For example, the softening accelerator may be ethanol or the like.

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

Then, it presses against the silver nanowire 106 present on the polymer layer 104 softened by the softening accelerator.

This pressurization can be performed with a device such as a roll press, and the silver nanowires 106 on the polymer layer 104 are impregnated to a predetermined depth in the softened polymer layer 104.

In this case, the impregnation depth of the silver nanowire 106 may be performed so that the pressing process is set to 50 nm or less from the surface, but the impregnation depth may be small compared to the embodiment of FIGS. 1 and 2.

Subsequently, the polymer layer 104 in which the silver nanowire 106 is embedded is dried to remove at least a portion of the solution 108a, components, and the like, and the silver nanowire 106 is firmly fixed inside the polymer layer 104. Order.

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 at 0.5 to 1% by weight, and 0.5 to 1% by weight of chloride Ion-containing materials, 0.5 to 1% by weight of brominated ion-containing materials, softening accelerators, and the like.

According to this embodiment, by omitting the softener injection process, step S130 of FIG. 1, the process can be further simplified than the embodiments of FIGS. 1 to 3. Since the silver nanowire 106 is embedded inside the polymer layer 104, the 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 satisfy the thickness range of the polymer layer 104, and thus have excellent light transmittance.

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

The transparent electrodes of the silver nanowires shown in FIGS. 5A and 5B were manufactured as follows according to an 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 in addition to the silver nanowires, the solution was polyvinylphytolidone using ethylene glycol as a solvent, a substance containing chloride ions as a stabilizer, and a growth regulator. Materials containing brominated ions were included. Next, after drying the solution, the polymer layer was softened by spraying a softening agent on the polymer layer coated with the solution, so that the silver nanowire could be impregnated, and the softening layer softened at least the surface of the polymer layer in a gel state. The emollient has a molecular weight of 65 to 80 and was used as the compound described in FIG. 2. Subsequently, the silver nanowires were pressed against the submerged silver nanowires, and 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 in which the silver nanowire was embedded, and the silver nanowire was 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 on which the solution was applied was cured at a high temperature, and the silver nanowires were pressed to be fixed on the polymer layer. According to the conventional method, the silver nanowire is not impregnated on the polymer layer, and the silver nanowire is formed in a network form while being exposed on the polymer layer.

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

5A and 5B, the silver nanowire according to the present embodiment is impregnated into the polymer layer, and further, at the intersection of the network-type silver nanowire, the upper silver nanowire when viewed in the pressing direction relative to the lower silver nanowire It can be seen that the contact is reliably in a bent form.

On the other hand, as shown in FIG. 6, a silver nanowire according to a conventional method is formed on a polymer layer to be exposed to the outside, and a portion where silver nanowires are not contacted at an intersection is found.

Unlike the conventional method in which silver nanowires are exposed, it can be seen that in the present embodiment, the silver nanowires are impregnated into the polymer layer, and thus, are superior to the conventional ones in terms of oxidation resistance, bending stability, and surface roughness.

In addition, although the conventional silver nanowires may be exposed to the outside and have higher electrical conductivity than the present embodiment, when the silver nanowires of the prior art and the present embodiment have the same electrical conductivity in the transparent electrode having the same area, the present embodiment is more than the conventional one. It has a remarkably high light transmittance. Accordingly, the transparent electrode of the silver nanowire according to the present embodiment can satisfy all electrical and light transmission characteristics.

Although the present invention has been described in detail through exemplary embodiments above, those skilled in the art to which the present invention pertains are capable of various modifications to the above-described embodiments without departing from the scope of the present invention. Will understand. Therefore, the scope of rights of the present invention should not be limited to the described embodiments, but should be determined by any modified or modified form derived from the claims and equivalent concepts as well as the claims described below.

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 speed;
Forming silver nanowires on the polymer layer whose surface is softened to a gel state at least by softening; And
A method of manufacturing a silver nanowire transparent electrode comprising fixing the silver nanowire to the softened polymer layer. According to claim 1,
The polymer has a viscosity of 900 to 1000cps, the polymer layer is a method of manufacturing a silver nanowire transparent electrode formed to have a thickness of 1μm to 5μm. According to claim 1,
The step of fixing the silver nanowire to the polymer layer is a method of manufacturing a silver nanowire transparent electrode that is formed such that the silver nanowire is at least exposed to the surface of the polymer layer or impregnated within a range of 50 nm from the surface. According to claim 1,
The step of forming the silver nanowire,
Applying a solution containing the silver nanowire on the polymer layer; And
A method of manufacturing a silver nanowire transparent electrode comprising the step of softening the polymer layer by spraying a softener on the polymer layer coated with the silver nanowire-containing solution. The method of claim 4,
The emollient is N-dimethylacetamide (DMAc), N, Ndimethylformamide (DMF), 1-methyl-2-pyrrolidinone (NMP), m-cresol, methanol, ethanol, propanol, butanol, methyl ethyl ketone (MEK) , Pentanol, hexanol, ethanediol, ethylene glycol, propanediol, butanediol, pentanediol, hexanediol, acetone and isopropanol, at least one or more of the method of manufacturing a silver nanowire transparent electrode. The method of claim 5,
The softener is a method of manufacturing a silver nanowire transparent electrode having a molecular weight of 65 to 80. The method of claim 4,
The softener is a method of manufacturing a silver nanowire transparent electrode injected into the polymer layer at an injection amount of 0.5 to 1.5ml / min. The method of claim 4,
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 drying the polymer layer in which the silver nanowire is embedded by the pressing. According to claim 1,
The step of forming the silver nanowires is by applying a solution containing the silver nanowires and a softening accelerator on the polymer layer, coating the silver nanowires on the polymer layer while softening the polymer layer, and the softening accelerator is CH A method of manufacturing a silver nanowire transparent electrode containing a group and an OH group and having a molecular weight of 65 or less. A silver nanowire embedded in a flexible polymer layer having light transmittance; And
A silver nanowire transparent electrode including a chemical layer having a molecular weight of 65 to 80 while remaining on at least a surface of the polymer layer when the silver nanowire is embedded by softening of the polymer layer.

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