KR102283873B1 - The transparent electrode device - Google Patents

Abstract

The present invention relates to a transparent electrode device, and in the present invention, the configuration of the device is <transparent support substrate>, <silver nanowire transparent electrode disposed on transparent support substrate>, <silver nanowire transparent electrode disposed on the transparent electrode, conductive carbon It is composed of sieve (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxide (ITO, ATO, AZO, etc.), polyamine-based carbon dispersant, etc. Nanoscale over-coating layer> and the like, and through this, on the device operator side, the problems of the existing over-coating layer (for example, the problem of increasing the electrical resistance value of silver nanowires, the problem of lowering the coating stability, the coating uniformity Conductive carbon materials (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxides (ITO, ATO, AZO, etc.), it can support to dramatically improve the abrasion resistance, chemical resistance, heat resistance, low reflectivity, and flexibility of the silver nanowire transparent electrode.

Description

The transparent electrode device

The present invention relates to a transparent electrode device, and more particularly, the configuration of the device, <transparent support substrate>, <silver nanowire transparent electrode disposed on transparent support substrate>, <silver nanowire transparent electrode disposed on the conductive, Carbon material (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxide (ITO, ATO, AZO, etc.), polyamine-based carbon dispersant, etc. The nanoscale over-coating layer constituted>, etc., and through this, the problems of the existing over-coating layer on the device operator side (for example, the problem of increasing the electrical resistance value of the silver nanowire, the problem of lowering the coating stability, the coating uniformity Conductive carbon materials (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxides (ITO) , ATO, AZO, etc.), it relates to a transparent electrode device that can support to dramatically improve the abrasion resistance, chemical resistance, heat resistance, low reflectivity, flexibility, etc. of the silver nanowire transparent electrode.

Recently, as technology related to electronic devices/displays has rapidly developed, technology related to transparent electrodes is also rapidly developing.

For example, Korean Patent Application Laid-Open No. 10-2014-135918 (Name: Method for Manufacturing Transparent Electrode Film) (published on November 27, 2014), Korean Patent Laid-Open No. 10-2015-39373 (Name: Transparent electrode and the same) Electronic device including) (published on April 10, 2015), Korean Patent Application Laid-Open No. 10-2018-61800 (Name: Method of Manufacturing Transparent Electrode) (published on June 6, 2018), Korean Patent Laid-Open No. 10-2018- No. 109510 (name: manufacturing method of transparent electrode) (published on Oct. 8, 2018), Korean Patent Laid-Open No. 10-2018-124405 (name: flexible transparent electrode and manufacturing method thereof) (published on Nov. 21, 2018) et al., an example of a transparent electrode according to the prior art is disclosed in more detail.

On the other hand, under this conventional system, Indium Tin Oxide (ITO) is a transparent electrode material generally used for optical devices, and has characteristics of high transmittance and low sheet resistance. Recently, as a foldable display or a rollable display is widely released, flexible devices and parts are variously required. However, since the ITO is a hard material, it is not suitable for a next-generation display, and there is a problem in that the electrical characteristics decrease as the area increases, so the development of an alternative transparent electrode material was required.

In general, silver nanowires can solve the above issues of flexibility and reduction in electrical properties of a large area. These silver nanowires have a diameter of nanometers and a length of micrometers, and by arranging them in a network form, they can be used as electrodes. The silver nanowire has similar or higher transmittance and electrical properties compared to the ITO electrode, and since it can implement flexibility, recently, it has been in the spotlight as a material for a transparent electrode.

However, since the silver nanowire is subjected to unnecessary surface oxidation due to rapid bonding with oxygen after coating, problems of unintentional increase in sheet resistance, increase in haze, and decrease in transmittance occur. In order to solve the above problem, in the prior art, an overcoat layer made of acrylic or similar resin for preventing surface oxidation of the silver nanowire coating is taken on the surface of the silver nanowire.

However, since the over-coating layer made of acrylic or similar resin has problems in increasing the electrical resistance value of the silver nanowire, lowering the coating stability, and impairing the coating uniformity, the conventional overcoating layer of the silver nanowire Commercialization for the prevention of surface oxidation is inevitably difficult.

No. 10-2014-135918 (Name: Manufacturing method of transparent electrode film) (published on November 27, 2014) Republic of Korea Patent Publication No. 10-2015-39373 (Name: Transparent electrode and electronic device including the same) (published on April 10, 2015) Korean Patent Laid-Open Patent No. 10-2018-61800 (Name: Method of Manufacturing Transparent Electrode) (published on June 6, 2018) Korean Patent Laid-Open Patent No. 10-2018-109510 (Name: Method for manufacturing transparent electrode) (published on Oct. 8, 2018) Korean Patent Laid-Open Patent No. 10-2018-124405 (Name: Flexible transparent electrode and manufacturing method thereof) (published on November 21, 2018)

Therefore, it is an object of the present invention to determine the configuration of the device, <transparent support substrate>, <silver nanowire transparent electrode disposed on transparent support substrate>, <silver nanowire transparent electrode disposed on the conductive carbon body (nano carbon black, Nanoscale overcoating layer composed of CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxide (ITO, ATO, AZO, etc.), polyamine-based carbon dispersant, etc. >, etc., and through this, on the device operator side, the problems of the existing over-coating layer (e.g., the problem of increasing the electrical resistance value of the silver nanowire, the problem of lowering the coating stability, the problem of inhibiting the coating uniformity, etc.) Conductive carbon materials (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxides (ITO, ATO, AZO, etc.), etc. Based on the functional performance of the silver nanowire transparent electrode, it is to support to dramatically improve the abrasion resistance, chemical resistance, heat resistance, low reflectivity, and flexibility.

Other objects of the present invention will become more apparent from the following detailed description and accompanying drawings.

In the present invention in order to achieve the above object, a transparent support substrate; a silver nanowire transparent electrode disposed on the transparent support substrate; an overcoat layer disposed on the silver nanowire transparent electrode, wherein the overcoat layer includes: UV curable acrylate; conductive metal oxides; A conductive carbon body is included, and the conductive carbon body has affinity with the carbon particles on the conductive carbon body side, and has affinity with the polymer constituting the UV curable acrylate and conductive metal oxide, so that the conductive carbon body side A polyamine-based carbon dispersant capable of dispersing the conductive carbon body is mixed while blocking the precipitation of carbon, and the overcoat layer is a solution in which methyl ethyl ketone (MEK: Methyl Ethyl Ketone) and toluene are mixed, nano carbon black and After mixing siloxane and diethylenetriamine, it is dispersed in an ultrasonic method or by a steering method to disperse the conductive carbon solution, and dispersed in the dispersed conductive carbon solution and isopropyl alcohol (IPA: IsoPropyl Alcohol) ATO (Antimony Tin Oxide) and UV-curable acrylate, and _{a silane coupling agent consisting of [Si(OR1) 2} X, R1: alkyl group, X: epoxy group, amino group, aryl group, or methacrylic group], and ultrasonic wave Disclosed is a transparent electrode device, characterized in that it is prepared through a procedure of preparing an overcoating solution by dispersing it in a manner or a steering manner, and wherein the overcoating layer has a nano-scale thickness of 10 nm to 1000 nm.

In the present invention, the configuration of the device is, <transparent support substrate>, <silver nanowire transparent electrode disposed on transparent support substrate>, <silver nanowire transparent electrode disposed on the conductive carbon body (nano carbon black, CNT, graphene) , conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxides (ITO, ATO, AZO, etc.), polyamine-based carbon dispersant, etc. Therefore, under the implementation environment of the present invention, on the device operator side, the problems of the existing overcoat layer (for example, the problem of increasing the electrical resistance value of the silver nanowire, the problem of lowering the coating stability, the problem of inhibiting the coating uniformity, etc.) Conductive carbon materials (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.), conductive metal oxides (ITO, ATO, AZO, etc.), etc. Based on the functional performance of the silver nanowire, it is possible to dramatically improve the abrasion resistance, chemical resistance, heat resistance, low reflectivity, and flexibility of the silver nanowire transparent electrode.

1 is an exemplary diagram conceptually illustrating a detailed configuration of a transparent electrode device according to the present invention.
2 is an exemplary view conceptually illustrating a state in which the molecular network of the overcoat layer is tightly coupled by the nano carbon black according to the present invention.
3 is an exemplary view conceptually illustrating a preparation step for manufacturing a transparent electrode device according to the present invention.
4 to 6 are process flow charts sequentially showing the manufacturing procedure of the transparent electrode device according to the present invention.
7 is an exemplary view conceptually illustrating a transparent electrode device according to another embodiment of the present invention.

Hereinafter, a transparent electrode device according to the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 1 , the transparent electrode device 1 according to the present invention has a transparent support substrate 2 having flexible characteristics (eg, PET film, acrylic film, urethane film, PO film, PI film, PP film). etc.), the silver nanowire transparent electrode 4 disposed on the transparent support substrate 2, and the overcoat layer 5 disposed on the silver nanowire transparent electrode 4 are systematically combined to take a configuration do.

At this time, in the present invention, silver nanowires are dispersed in various dispersions, or silver nanowires are coated alone to form the silver nanowire transparent electrode 4, and the surface of the silver nanowires is coated with an overcoating solution, and an overcoating layer ( 5) is formed.

Here, the overcoat layer 5 of the present invention has a configuration in which <UV-curable acrylate>, <conductive metal oxide 5a>, and <conductive carbon body 5b> are systematically combined.

In this case, any one of Indium Tin Oxide (ITO), Antimony Tin Oxide (ATO), or Antimony Zinc Oxide (AZO) may be selected as the conductive metal oxide 5a, and the conductive carbon body 5b may include nano Any one of carbon black, CNT (Carbon Nano-Tube), graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, or fullerene may be selected.

At this time, in order for the present invention to be reliably applied/implemented, <UV curable acrylate> and <conductive metal oxide (ITO, ATO, AZO, etc.) (5a)> constituting the overcoat layer 5 are both friendly and conductive carbon An optimal dispersing agent capable of properly dispersing the sieve (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b) should be selected/provided ( For reference, if an optimal dispersant is not selected/provided, when mixed with the conductive metal oxide (ITO, ATO, AZO, etc.) 5a, the carbon of the conductive carbon body 5b may be improperly precipitated, or sufficient Serious problems that are not evenly distributed may occur).

Under these sensitive circumstances, in the present invention, in the conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b), ethylenediamine (Ethylenediamine) ), diethylenetriamine (Diethylenetriamine), triethylenetriamine (Triethylenetetamine), or tetraethylenepentaamine (Tetraethlenepentamine), a polyamine-based carbon dispersant containing any one of the additional containing (mixing) measures will be taken.

Of course, the polyamine-based carbon dispersant has affinity with the carbon particles on the side of the conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b). At the same time, since it has high affinity with polymers such as UV-curable acrylates and conductive metal oxides (ITO, ATO, AZO, etc.) (5a), when the polyamine-based carbon dispersant is applied to the present invention, the device operator Adoption of <conductive metal oxides (ITO, ATO, AZO, etc.) (5a)> without experiencing serious problems in that, for example, the carbon of the conductive carbon body 5b is improperly precipitated or not sufficiently dispersed Various advantages according to the "conductive carbon material (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b)" At the same time, it can be enjoyed widely.

Under the framework of the present invention, on the <conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b)> side, the By performing a role, as shown in FIG. 2 , it plays a role of significantly increasing the molecular network bonding force of the overcoat layer 5 .

In addition, under the framework of the present invention, on the <conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b)> side, metal, that is, It also serves to significantly reduce the reflectance of the silver nanowire transparent electrode (4).

In addition, under the framework of the present invention, on the <conductive metal oxide (ITO, ATO, AZO, etc.) 5a> side, the silver nanowire transparent electrode 4 plays a role of alleviating the characteristic yellow light.

In addition, under the framework of the present invention, the <conductive metal oxide (ITO, ATO, AZO, etc.) 5a> side exhibits a wide range of thermal blocking/preventing properties, so that the overcoat layer 5 is more reliably resistant to surrounding thermal shock. It will play a role in supporting you to endure.

In particular, under the framework of the present invention, <conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b)>, <conductive metal oxide (ITO, ATO, AZO, etc.) (5a)> side by acting as a kind of connecting body, on the side of the silver nanowire transparent electrode 4, it can withstand physical impacts (for example, bending impact, etc.) will play a supporting role.

As a result, under the implementation environment of the present invention, the silver nanowire transparent electrode ( 5) abrasion resistance, chemical resistance, heat resistance, low reflectivity, flexibility, etc. can be dramatically improved.

At this time, the overcoating layer 5 undergoes a process of being coated on the silver nanowire transparent electrode 4 by a roll-to-roll process in a liquid overcoating solution state.

Here, the overcoating solution is <solvent (eg, a solution in which methyl ethyl ketone (MEK: Methyl Ethyl Ketone) and toluene are mixed), a conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene) , polypinol, polyethylene, polythiophene, fullerene, etc.) (5b) and a polyamine-based carbon dispersant are mixed and dispersed to disperse the conductive carbon body solution>, <In the dispersed conductive carbon body solution, a solvent ( For example, a conductive metal oxide (ITO, ATO, AZO, etc.) 5a dispersed in isopropyl alcohol (IPA: IsoPropyl Alcohol) (5a) and a UV curable acrylate are mixed, and a series of dispersion methods (eg, ultrasonic use method, steering Method of use, dispersing method (method of using superring mill, continuous mill, HS mill, ultra-high pressure disperser, nano pulverizer disperser, high viscosity mixer, dry/wet bead mill, pulverization disperser), dissolving method in solvent, etc.) It has the characteristics of being manufactured by

At this time, in the <dispersed conductive carbon body solution, a conductive metal oxide (ITO, ATO, AZO, etc.) 5a) and UV curable acrylate dispersed in a solvent (eg, isopropyl alcohol (IPA: IsoPropyl Alcohol)) If the mixing procedure> proceeds, in the present invention, a procedure for adding a silane coupling agent is performed.

Here, as the solvent, ethanol, IsoPropyl Alcohol (IPA), Methyl Ethyl Ketone (MEK), toluene, DI water, or methanol may be selected.

On the other hand, the UV curable acrylate constituting the overcoat layer 5 of the present invention has a content of 1wt% to 10wt% in the overcoat layer 5, and the conductive metal oxide (ITO, ATO, AZO, etc.) (5a) has a content of 1 wt% to 10 wt% in the overcoat layer 5, and the conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, poly Thiophene, fullerene, etc.) (5b) has a content of 1 wt% to 50 wt% in the overcoat layer, and the polyamine-based carbon dispersant has a content of 1 wt% to 10 wt% in the overcoat layer. will do

On the other hand, under the framework of the present invention _{, a silane coupling agent composed of [Si(OR1) 2} X, R1: alkyl group, X: epoxy group, amino group, aryl group, or methacrylic group] is further included in the overcoat layer 5 .

In this case, the silane coupling agent plays a role of remarkably improving the flexibility of the overcoat layer 5 .

In this case, the silane coupling agent has a feature of including any one or more materials selected from the group consisting of vinyl-based, epoxy-based, amine-based, amino-based, aryl group, butyl group, octyl group, and acryl-based group.

At this time, the silane coupling agent has a content of 1% to 50% in the entire overcoat layer 5 .

On the other hand, under the framework of the present invention, the overcoat layer 5 of the present invention preferably has a nano-unit thickness (ie, nano-scale thickness) of 10 nm to 1000 nm.

At this time, if the overcoat layer 5 has a thickness of less than 10 nm, a problem in which the inherent function of overcoating is lost (for example, a problem in that the surface oxidation of the transparent electrode 4 cannot be blocked, etc.) may occur. When the overcoat layer 5 has a thickness exceeding 1000 nm, the thickness becomes too thick, and the content of the polymer having strong insulating properties increases, for example, the surface of the silver nanowire transparent electrode 4 A problem of lowering resistance may occur.

On the other hand, as shown in FIG. 1 , a hard coating layer 3 for improving the adhesion of the transparent electrode 4 is additionally formed at the interface between the transparent support substrate 2 and the transparent electrode 4 .

In this case, the composition for forming the hard coating layer 3 is an acryl functional group, a methacrylic functional group, or an oligomer, a monomer, or a mixture of an oligomer and a monomer having various functional groups, and various composite inorganic materials if necessary. A solvent to control the viscosity and fluidity, a photoinitiator to cause curing, an antioxidant to prevent oxidation, a polymerization inhibitor, and a UV blocker and absorbent to show stable UV properties, and surface roughness It is made by using a small amount of leveling agent for stability.

At this time, the hard coating layer 3 preferably has a thickness of 2㎛ ~ 5㎛.

Here, the hard coating layer 3 has, as an additional component, aero silica for improving the bonding force with the transparent electrode 4 depending on the situation, and in this case, the aero silica has a content of 1% to 10% It forms a component of the hard coating layer (3) with a solid having a.

As described above, in the present invention, the configuration of the transparent electrode device 1 is <transparent supporting substrate 2>, <silver nanowire transparent electrode 4 disposed on the transparent supporting substrate 2>, and <silver nanowire transparent electrode. As disposed in (4), conductive carbon bodies (nano carbon black, CNT, graphene, conductive carbon, polythiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b), conductive metal oxides (ITO, ATO) , AZO, etc.) (5a), a nanoscale overcoat layer (5)> composed of a polyamine-based carbon dispersant, etc., under the implementation environment of the present invention, on the device operator side, For example, a conductive carbon body (nano carbon black, CNT, graphene, conductive carbon, poly Based on the functional performance of thiophene, polypinol, polyethylene, polythiophene, fullerene, etc.) (5b) and conductive metal oxides (ITO, ATO, AZO, etc.) (5a), Abrasion resistance, chemical resistance, heat resistance, low reflectivity, flexibility, etc. can be dramatically improved.

Hereinafter, specific embodiments of the transparent electrode device 1 according to the present invention described above will be described in detail.

<Example> (refer to FIG. 3)

1. Preparation step (S1) of the transparent support substrate (2)

As the transparent support substrate (2), PET (Polyethylene terephthalate) with a thickness of 100 micrometers called U43R produced by Kolon in Korea, which has excellent optical performance, is used. This film has basically high optical properties, so 90% It shows the above transmittance performance. In addition, the primer layer made of a urethane primer, more strictly speaking, a polyester layer, is composed of a 50 to 100 nm layer, so when forming a hard coating layer on the surface of the U43R base, stable adhesion performance is obtained. to provide.

2. Preparation of hard coating solution (S2)

In order to implement a stable hard coating layer 3 on the prepared transparent support substrate 2, the refractive index (RI value) of the hard coating layer 3 is suitable between 1.42 and 1.48 due to the structural characteristics of U43R, so it is generally used All possible hard coatings can be used, but a hard coating solution containing inorganic substances was prepared. Accordingly, the inorganic material to be used does not need to be specified in Erero Silica, but OX50 (10 g) provided by Evonik was used.

First, prepared distilled water (80 mL) and methanol (20 mL) were stirred for 10 minutes in advance at 1000 rpm in a high-speed stirrer.

Then, Evonik's OX50 (1KG) was added to the stirred solution, and sodium polyUV-curable acrylate (1G) was put in an autoclave as well, and reacted at 230°C at 750atm for 12 hours to make an ultra-fine nano-size silica sol. . In this case, the silica sol has a size of 10 to 20 nm and may serve to induce the adhesion of materials such as silver nanoparticles in the hard coating.

Next, in a beaker, 100G of urethane UV-curable acrylate oligomer (EB-1200), 20G of reactive monomer trimethylolpropane triUV-curable acrylate (TMPTA), and tri(2-hydroxyethyl)isocyanate di-UV-curable Acrylate (THEICDA) 20G, photoinitiator is hydroxycyclohexyl phenyl ketone (IGCURE 184) 1G, benzophenone (BP) 1G, 3ML of the silica sol prepared above is added, and the solvent is methylethylketone (MEK) 150G and After adding 150 g of toluene, and 0.3 g of the antioxidant dibutylhydroxytoluene (BHT) again, 0.3 g of the polymerization inhibitor Hydroquinone and the UV blocker HALS for the safety of the resin After adding 1G, it was stirred for 30 minutes at 500RPM in a high-speed stirrer to make a hard coating solution for easy attachment of silver nanowires.

3. Preparing a silver nanowire transparent electrode (S3)

In order to manufacture silver nanowires having an ultra-fine structure, silver nanowires are produced by adding an ionic liquid and an aqueous solution in which silver salt is dissolved into a hydrothermal synthesizer, changing temperature and pressure, as a general method. It was manufactured (of course, it is okay to use silver nanowires generally sold in the market).

4. Preparing the overcoating solution (S4)

First, in a solution in which methyl ethyl ketone (MEK: Methyl Ethyl Ketone) and toluene are mixed in a 1:1 ratio, nano carbon black, siloxane, and diethylene triamine are mixed (in this case, MEK + toluene: nano carbon black: siloxane) : Diethylenetriamine = 97.7: 1: 0.3: 1), by ultrasonic method for 30 minutes or by steering method for 1 hour or more, the conductive carbon solution was dispersed.

In this way, after the conductive carbon solution is dispersed, in the conductive carbon solution, ATO (Antimony Tin Oxide) and UV curable acrylate (dispersed in ethanol, 1%) are dispersed in isopropyl alcohol (IPA: IsoPropyl Alcohol). solid content), and mix the silane coupling agent (in this case, ATO; nano carbon black: UV curable acrylate: silane coupling agent = 0.5: 1; 97.5: 1), ultrasonic for 30 minutes or steering for 1 hour or more By dispersing, an overcoating solution was prepared.

5. Manufacturing the transparent electrode device 1 (refer to FIGS. 4 to 6)

A hard coating solution made with a refractive index of 1.46 was uniformly coated on the prepared U43 PET film by micro gravure coating. Heat input at 80 degrees for 1 minute to blow off all the solvents inside the hard coating liquid, and curing at 200 MJ through a UV curing machine in the state that only acrylic solids were left to make a hard coating layer 3 having a strength of 500G 2H (Fig. see 4).

On the surface of the prepared hard coating layer 3, the prepared silver nano-wire (refer to item 3 above) was coated using a slot die, and through this, a silver nano-wire transparent electrode 4 was formed (see FIG. 5). The coated silver nanowire transparent electrode 4 was cured at 100 degrees for 2 minutes. At this time, as some radicals and silicas on the surface of the silver nanowire transparent electrode 4 and the hard coating layer 3 undergo plastic change, the hard coating layer 3 and the silver nanowire are combined, so that on the hard coating layer 3 A silver nanowire transparent electrode (4) was made.

In order to protect the surface of the made silver nanowire transparent electrode 4 and improve the function of the transparent electrode 4, the prepared overcoating solution is coated on the surface of the silver nanowire transparent electrode 4 using a slot die, and this Through this, an overcoat layer 5 was prepared. At this time, the coating procedure was carried out UV curing with a mercury lamp.

<Comparative example>

In the comparative example, S1 to S3 were performed in the same manner as in the previous example, but the overcoating solution was prepared only with UV-curable acrylate without other additives unique to the present invention.

Each of the transparent electrode devices manufactured as described above showed results as shown in Table 1 below.

(Test data for each item) Item Example comparative example constant temperature and humidity test
(85℃, 85%, 98 hours) 40 Ω/sq (initial value) → 44 Ω/sq (changed value) 40Ω/sq (initial value)→48Ω/sq (changed value) Thermal shock test (-40℃ 2 hours to 85℃ 2 hours, 20 cycles) 40Ω/sq (initial value)→43Ω/sq (changed value) 40Ω/sq (initial value)→62Ω/sq (changed value) reflectivity
(based on 550nm) 3.1% 4.1%

As shown in the test data, the transparent electrode device 1 having the overcoat layer 5 according to the present invention has excellent constant temperature/humidity effect compared to the comparative example, and does not cause a large change even with a predetermined thermal shock. , it was found that the low reflectance was excellently maintained.

According to the circumstances, the present invention can be made various modifications.

For example, as shown in FIG. 7 , in the present invention, it is also possible to take a changed measure of additionally forming the hard coating layer 3 on the rear surface of the transparent support substrate 1 .

Of course, even in the case of these other implementations, the device operator side has no problems with the existing over-coating layer (for example, the problem of increasing the electrical resistance value of the silver nanowire, the problem of lowering the coating stability, the problem of impairing the coating uniformity, etc.) Without suffering, based on the functional performance of conductive nano carbon black (5b), conductive metal oxide (5a), etc., the abrasion resistance, chemical resistance, heat resistance, low reflectivity, flexibility, etc. of the silver nanowire transparent electrode 5 are revolutionary can be improved with

The present invention is not limited to a specific field, and exhibits a useful effect overall in various fields requiring quality improvement of the transparent electrode.

And, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be practiced with various modifications by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or point of view of the present invention, and such modified embodiments should fall within the scope of the appended claims of the present invention.

1: Transparent electrode device
2: Transparent support material
3: Hard coating layer
4: Silver nanowire transparent electrode
5: Overcoat layer
5a: conductive metal oxide
5b: conductive carbon body

Claims (14)

a transparent support substrate;
a silver nanowire transparent electrode disposed on the transparent support substrate;
It includes an over-coating layer disposed on the silver nanowire transparent electrode,
The overcoat layer
UV curable acrylates;
conductive metal oxides;
Containing a conductive carbon body,
The conductive carbon body has affinity with the carbon particles on the conductive carbon body side, and has affinity with the polymer constituting the UV-curable acrylate and conductive metal oxide to block precipitation of carbon on the conductive carbon body side, A polyamine-based carbon dispersant capable of dispersing the conductive carbon body is mixed,
The over-coating layer is a solution of methyl ethyl ketone (MEK: Methyl Ethyl Ketone) and toluene, mixed with nano carbon black, siloxane, and diethylenetriamine, and then dispersed in an ultrasonic method or a steering method, conductive carbon Dispersing the sieve solution, and in the dispersed conductive carbon solution, ATO (Antimony Tin Oxide) and UV curable acrylate dispersed in IPA (IsoPropyl Alcohol), and [Si(OR1) ₂ X, R1 : Alkyl group, X: Epoxy group, amino group, aryl group, or methacrylic group] is mixed with a silane coupling agent and dispersed in an ultrasonic method or a steering method, prepared through a procedure for preparing an overcoating solution,
The overcoat layer is a transparent electrode device, characterized in that it has a nano-unit thickness of 10nm ~ 1000nm. delete delete delete delete delete The method according to claim 1, wherein the UV curable acrylate has a content of 1 wt% to 10 wt% in the over-coating layer, and the conductive metal oxide has a content of 1 wt% to 10 wt% in the over-coating layer, The conductive carbon body has a content of 1wt% to 50wt% in the overcoat layer, and the polyamine-based carbon dispersant has a content of 1wt% to 10wt% in the overcoating layer Transparent electrode device, characterized in that. delete delete The transparent electrode device according to claim 1, wherein the silane coupling agent has a content of 1 wt% to 50 wt% in the overcoat layer. The method of claim 1, wherein the silane coupling agent comprises at least one material selected from the group consisting of vinyl, epoxy, amine, amino, aryl, butyl, octyl, and acrylic. Transparent electrode device. The transparent electrode device according to claim 1, wherein a hard coating layer for improving adhesion of the silver nanowire transparent electrode is additionally formed on the interface between the transparent support substrate and the silver nanowire transparent electrode. The method of claim 12, wherein the hard coating layer is an oligomer having a functional group, a monomer (Momomoer), a composite inorganic material, a solvent for controlling viscosity and fluidity, a photoinitiator for curing, oxidation to prevent oxidation A transparent electrode device, characterized in that it is formed by a coating procedure and a curing procedure of a hard coating liquid containing an inhibitor, a polymerization inhibitor, a uv blocker, an absorbent, or a leveling agent. The transparent electrode device according to claim 12, wherein the hard coating layer has a thickness of 2 μm to 5 μm.

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