KR101154869B1 - Carbon nanotube transparent film with low resistance and high conductivity, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a low-resistance high-conductivity carbon nanotube transparent film and a method of manufacturing the same, which improve thermal conductivity and provide thermal stability of the carbon nanotube coating layer by p-doping using a p-type organic precursor to the carbon nanotube coating layer. will be. According to the present invention, a carbon nanotube coating layer is formed on a substrate. In addition, a p-type organic precursor including TFSI (bis (trifluoromethanesulfonyl) imide) is coated with an anion group on the carbon nanotube coating layer. At this time, the p-type organic precursor used as the p-type dopant generates charge transfer between the carbon nanotubes and the cations of the p-type organic precursor having high electron evaporation on the surface of the carbon nanotube coating layer. In addition, anionic groups of the p-type organic precursor are delocalized to stabilize the doping effect. At this time, as the p-type organic precursor (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) ₂ And the like can be used.

Description

Carbon nanotube transparent film with low resistance and high conductivity, and manufacturing method

The present invention relates to a carbon nanotube transparent film and a method for manufacturing the same, and more particularly, p-doping using a p-type organic precursor to the carbon nanotube coating layer to improve the electrical conductivity of the carbon nanotube coating layer and thermal stability It relates to a low resistance high conductivity carbon nanotube transparent film provided and a method of manufacturing the same.

Since Smalley, a professor at Rice University in 1996, won the Nobel Prize for the discovery of fullerene, carbon has emerged as one of the most noteworthy materials in its nanoscale structure. If the core material of the 20th century was silicon, the core material of the 21st century is expected to be carbon. Carbon nanotube (CNT) is a material with high industrial applicability in the fields of electronic information communication, environment, energy, medicine, etc. due to its perfect properties and structure, and it is an important building block to lead nanoscience in the future. Expecting.

Carbon nanotubes have a graphite sheet (cylindrical sheet) in the form of a cylinder of nano size diameter, and has a sp2 bonding structure. The graphite surface exhibits the characteristics of a conductor or a semiconductor depending on the angle and structure at which it is curled. Single-walled carbon nanotubes (SWCNTs) also depend on the number of bonds in the wall. Double-walled carbon nanotubes (DWCNT), multi-walled carbon nanotubes (MWCNT) can be classified into a bundle of carbon nanotubes (rope carbon nanotubes). In particular, SWCNTs have a variety of metallic and semiconducting properties to represent a variety of electrical, chemical, physical and optical properties. These features enable more sophisticated and integrated devices. Applications of carbon nanotubes currently being studied include transparent electrodes, electrostatic dispersion films, field emission devices, surface heating elements, optoelectronic devices, various sensors, and transistors. A key technology in these applications is the formation of carbon nanotube transparent films with excellent properties.

In general, to increase the electrical conductivity of carbon nanotubes, p-type doping techniques are used. Doping of carbon nanotubes can have two effects. The first is the effect of lowering the contact resistance between the metallic carbon nanotubes and the semiconductor carbon nanotubes, that is, the height of the Schottky barrier, and in the case of the semiconducting carbon nanotubes, the number of hole carriers is increased. It can be expected to increase the electrical conductivity.

However, in order to improve the electrical conductivity, p-dopant lowers sheet resistance by using a dopant, but when treated at high temperature, dopants may desorb or agglomerate, thereby reducing the doping effect.

In order to solve this problem, it is time to study the thermal stability. Currently, AuCl ₃ is the strongest oxidizing material among the metal ions so far, and the reduction potential value of Au ³⁺ ion is + 1.52V, which is the most capable of strong p-type doping of carbon nanotubes. A popular dopant material.

However, AuCl ₃ has a good sheet resistance reduction ability, but residues after doping occur and the price is too expensive. Therefore, a new dopant development is required to compensate for the drawbacks of AuCl ₃ .

 Accordingly, an object of the present invention is to improve the electrical conductivity of the carbon nanotube coating layer and maintain a thermally stable form, as well as a low-resistance high conductivity carbon nanotube transparent film using a p-type organic precursor that is inexpensive and post-treatment and It is providing the manufacturing method thereof.

Another object of the present invention is a low-resistance high-conductivity carbon nanotube transparent film using a p-type organic precursor capable of suppressing the doping dopants falling off from the carbon nanotube coating layer or agglomeration with each other even if treated at a high temperature and its It is to provide a manufacturing method.

Still another object of the present invention is to demonstrate a similar electrical property as AuCl ₃ , a low resistance high conductivity carbon nanotube transparent film using a p-type organic precursor that does not remain on the carbon nanotube coating layer after p-doping and It is providing the manufacturing method thereof.

In order to achieve the above object, the present invention comprises the steps of forming a carbon nanotube coating layer on a substrate, and coating a p-type organic precursor containing bis (trifluoromethanesulfonyl) imide (TFSI) as an anion group on the carbon nanotube coating layer It provides a method for producing a carbon nanotube transparent film comprising the step of.

In the method for producing a carbon nanotube transparent film according to the present invention, the p-type organic precursor is (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) _{2 It} can be one.

In the method for producing a carbon nanotube transparent film according to the present invention, the carbon nanotubes forming the carbon nanotube coating layer is a single-walled carbon nanotubes, functionalized single-walled carbon nanotubes, double-walled carbon nanotubes, functionalized double-walled carbon It may include at least one of nanotubes, multi-walled carbon nanotubes, functionalized multi-walled carbon nanotubes.

In the method of manufacturing a carbon nanotube transparent film according to the present invention, the forming of the carbon nanotube coating layer may include dispersing a predetermined amount of carbon nanotubes in an aqueous solution containing an organic solvent or a dispersant to form a carbon nanotube solution. Removing the carbon nanotubes not dispersed in the carbon nanotube solution by centrifugation; spraying the centrifuged carbon nanotube solution on the substrate; and spraying the injected carbon nanotube solution. The heat treatment may include forming a carbon nanotube coating layer.

In the method of manufacturing a carbon nanotube transparent film according to the present invention, the coating of the p-type organic precursor may be performed by at least one method of spin coating, spray coating, dip coating, and roll coating.

In the method of manufacturing a carbon nanotube transparent film according to the present invention, the step of coating the p-type organic precursor, the step of applying a solution containing the p- type organic precursor to the carbon nanotube coating layer and The spin coating may be performed by rotating the applied solution at 1000 to 3000 rpm for 2 to 10 minutes.

In the method of manufacturing a carbon nanotube transparent film according to the present invention, the applying step, the step of dissolving the p-type organic precursor in an organic solvent to form a dopant solution, by mixing and heating the dopant solution Uniformly dispersing the p-type organic precursor in the organic solvent, and applying the dopant solution in which the p-type organic precursor is uniformly dispersed onto the carbon nanotube coating layer as a droplet. have. In this case, the organic solvent may include one of aliphatic, aromatic, and mixed solvents thereof including nitromethane, nitrobenzene, and dimethylformaide.

In the method of manufacturing a carbon nanotube transparent film according to the present invention, the coating of the p-type organic precursor, drying the coated p-type organic precursor at room temperature after the spin coating step It may further include.

The present invention also provides a carbon nanotube transparent film including a carbon nanotube coating layer formed on a substrate and a p-type organic precursor coating layer coated on the carbon nanotube coating layer and including TFSI as an anion group.

In the carbon nanotube transparent film according to the present invention, the p-type organic precursor of the p-type organic precursor coating layer is (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) 2NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) _{2 It} may be one.

According to the present invention, the carbon nanotube coating layer is coated with a p-type organic precursor containing TFSI (bis (trifluoromethanesulfonyl) imide) with an anion group, thereby carbon nanotubes and p-type organic on the surface of the carbon nanotube coating layer Charge transfer occurs between the cations of the precursor, and the anionic group of the p-type organic precursor delocalizes to stabilize the doping effect. As a result, the carbon nanotube coating layer coated with the p-type organic precursor may improve electrical conductivity and maintain a thermally stable state.

In addition, since the carbon nanotube coating layer doped with the p-type organic precursor according to the present invention is thermally stable, the doped dopants may be separated from the carbon nanotube coating layer or aggregated together even at high temperature. have.

In addition, as can be seen in the graph showing the sheet resistance change by the doping of Figures 4 to 6, and the graph showing the sheet resistance change by the heat treatment after doping, p-type organic precursor according to the present invention is similar to AuCl ₃ While exhibiting a specific characteristic, no residue is left on the carbon nanotube coating layer after p-doping.

In addition, as described above, since no residue remains on the surface of the carbon nanotube coating layer after p-doping, a process for removing process defects, contamination, and residues caused by residues remaining on the carbon nanotube coating layer after p-doping is performed. Can be omitted.

In addition, since the p-type organic precursor is formed on the carbon nanotube coating layer by a spin coating method, an additional step using a reducing agent, a linker, and a coupling agent, which is required for the conventional p-doping, is unnecessary. It is possible to remove the material or to suppress process defects caused by by-products.

In addition, since the p-type organic precursor can be used in the carbon nanotube coating layer prepared even in the state where semiconducting and metallic carbon nanotubes are not separated, carbon nanotubes are transparent by eliminating the additional purification and separation process of carbon nanotubes. The manufacturing process of the film can be simplified.

1 is a cross-sectional view showing a carbon nanotube transparent film using a p-type organic precursor according to the present invention.
FIG. 2 is a flowchart illustrating a method of manufacturing the carbon nanotube transparent film of FIG. 1.
3 is a table showing dopants used in Examples and Comparative Examples of the present invention.
Figure 4 is a graph measuring the change in sheet resistance before, after heat treatment and after 80 days of heat treatment of the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.
Figure 5 is a graph measuring the sheet resistance change for 80 days before heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.
Figure 6 is a graph measuring the sheet resistance change for 80 days after the heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.
7 is a graph measuring changes in the Rieman spectrum of carbon nanotubes of a carbon nanotube transparent film prepared according to Examples and Comparative Examples of the present invention.
Figure 8 is a graph measuring the change in the Rieman spectrum of carbon nanotubes after heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.
Figure 9 is a SEM photograph of the surface after the heat treatment of the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. It should be noted that in the following description, only parts necessary for understanding the embodiments of the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one preferred embodiment of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be substituted for them at the time of the present application It should be understood that there may be equivalents and variations.

1 is a cross-sectional view showing a carbon nanotube transparent film using a p-type organic precursor according to the present invention.

Referring to FIG. 1, the carbon nanotube transparent film 100 according to the present invention includes a substrate 10, a carbon nanotube coating layer 20, and a p-type organic precursor coating layer 30.

The substrate 10 may be any one of glass, quartz, glass wafers, silicon wafers, transparent and opaque plastic substrates, transparent and opaque polymer films, and metals. Piranha solution treatment, acid treatment, base treatment, plasma treatment, atmospheric pressure plasma treatment, ozone treatment, UV treatment, SAM (self assembled monolayer) treatment, and polymer or monomolecule coating method Surface treatment can be performed using at least one of the methods.

The carbon nanotube coating layer 20 is formed on one surface of the substrate 10. The carbon nanotube coating layer 20 may be formed by spraying a uniformly dispersed carbon nanotube solution on the substrate 10. At this time, the carbon nanotubes forming the carbon nanotube coating layer 20 are single-walled carbon nanotubes, functionalized single-walled carbon nanotubes, double-walled carbon nanotubes, functionalized double-walled carbon nanotubes, multi-walled carbon nanotubes, and functionalized multiplexes. It may include at least one of the wall carbon nanotubes.

The p-type organic precursor coating layer 30 is formed to cover the carbon nanotube coating layer 20. The p-type organic precursor coating layer 30 may be formed on the carbon nanotube coating layer 20 by spin coating. The p-type organic precursor forming the p-type organic precursor coating layer 30 is a p-type dopant containing trifluoromethanesulfonyl (bis) as an anion group. Examples of p-type organic precursors include (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) _2, and the like. This can be used.

As such, by forming the p-type organic precursor coating layer 30 as the p-type dopant on the carbon nanotube coating layer 20, the carbon nanotube and the p-type organic precursor on the surface of the carbon nanotube coating layer 20 Charge transfer occurs between the cations of, and the anion group of the p-type organic precursor is delocalized to stabilize the doping effect. As a result, the carbon nanotube coating layer 20 coated with the p-type organic precursor may improve electrical conductivity and maintain a thermally stable state.

The manufacturing method of the carbon nanotube transparent film 100 according to the present invention will be described with reference to FIGS. 1 and 2 as follows. 2 is a flow chart according to the manufacturing method of the carbon nanotube transparent film 200 of FIG.

First, the carbon nanotube coating layer 20 is formed on the substrate 10 in step S50. That is, the organic solvent and a predetermined amount of carbon nanotubes are mixed in step S51. Next, in step S53, the carbon nanotubes mixed in the organic solvent are dispersed in the organic solvent to form a carbon nanotube solution. Next, in step S55, the carbon nanotubes not dispersed in the carbon nanotube solution are removed by centrifugation. Subsequently, the carbon nanotube solution centrifuged in step S57 is uniformly sprayed onto the substrate 10. Then, the organic solvent is removed through heat treatment of the carbon nanotube solution injected in step S59 to form a carbon nanotube coating layer 20. In the present description, an example in which carbon nanotubes are dispersed in an organic solvent to form a carbon nanotube solution is disclosed, but is not limited thereto. That is, the carbon nanotube solution may be formed using an aqueous system containing a dispersant. For example, the carbon nanotube solution may be formed using an aqueous surfactant. In this case, as the aqueous surfactant, SDBS, SDS, LDS, CTAB, DTAB, PVP, Triton X-series, Brij-series, Tween-series, poly (acrylic acid), and polyvinyl alcohol may be used.

At this time, NMP, DMF, DCE, THF, etc. may be used as the organic solvent in step S51. When dispersing carbon nanotubes in an organic solvent in step S53 may be used an ultrasonic dispersion method.

In operation S60, a p-type organic precursor coating layer 30 is formed on the carbon nanotube coating layer 20. First, a solution containing a p-type organic precursor in steps S61 to S65 is applied to the carbon nanotube coating layer 20. Next, spin coating the solution applied in step S67 by rotating at 1000 to 3000 rpm for 2 to 10 minutes. The p-type organic precursor coated in step S69 is dried at room temperature to form the p-type organic precursor coating layer 30. In the present description, the spin coating method is exemplified, but is not limited thereto. For example, the p-type organic precursor coating layer 30 may be formed by spray coating, dip coating, roll coating, or the like.

At this time, applying the solution containing the p- type organic precursor to the carbon nanotube coating layer 20, first, in step S61 to form a dopant solution by dissolving the p- type organic precursor in an organic solvent. Subsequently, the dopant solution is mixed and heated in step S63 to uniformly disperse the p-type organic precursor in the organic solvent. In operation S65, a dopant solution in which the p-type organic precursor is uniformly dispersed is applied onto the carbon nanotube coating layer 20 as a droplet.

Wherein the p-type organic precursor is a p-type dopant comprising TFSI as an anion group. Examples of p-type organic precursors include (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) _2, and the like. This can be used.

As an organic solvent, a p-type organic precursor is well dispersed and easily removed during evaporation and drying after doping, and one of aliphatic, aromatic, and mixed solvents thereof including nitromethane, nitrobenzene, and dimethylformaide may be used.

Meanwhile, in the present embodiment, an example of drying the spin-coated dopant solution at room temperature is disclosed, but is not limited thereto. For example, the spin coated dopant solution can be heated to dry. At this time, the spin-coated dopant solution and the dopant spin-coated for about 10 to 30 minutes at 25 to 100 degrees to minimize the thermal stress on the lower carbon nanotube coating layer 20 and the substrate 10 The solution can be dried.

As described above, the p-type organic precursor used as the p-type dopant is charged between the cations of the carbon nanotube and the p-type organic precursor having high electron evolution degree on the surface of the carbon nanotube coating layer 20. transfer) occurs and the anionic group of the p-type organic precursor delocalizes to stabilize the doping effect.

The carbon nanotube transparent film using the p-type organic precursor according to the present invention will be described in more detail through Examples and Comparative Examples. Meanwhile, the carbon nanotube transparent film manufactured by the manufacturing method according to the present embodiment is just one embodiment, and the manufacturing method and the carbon nanotube transparent film made by the manufacturing method according to the present invention are limited to the present embodiment. no.

The p-type dopant used in this example and the comparative example is shown in FIG. As the p-type organic precursor according to this embodiment, C ₆ H ₅ N (SO ₂ CF ₃ ) ₂ (hereinafter referred to as 'T1'), C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ (hereinafter 'T2' ), (CF ₃ SO ₂ ) ₂ NAg (hereinafter referred to as 'T3'), (CF ₃ SO ₂ ) 2NH (hereinafter referred to as 'T4') were used. AuCl ₃ (hereinafter, referred to as 'T1') was used as a dopant according to the comparative example. In this case, T1 in Example 1, T2 in Example 2, T3 in Example 3, and T4 in Example 4 were used as p-type dopants.

Carbon nanotube transparent film according to Examples 1 to 4, Comparative Example was prepared by the following method. In order to consider only the reaction between the carbon nanotubes and the p-type dopant, the carbon nanotubes grown by the arc discharge method having an average diameter of 1.4 nm are dispersed in DCE. After dispersion, undispersed carbon nanotubes in DCE are removed by centrifugation. The dispersed carbon nanotube solution is then sprayed onto the quartz substrate. Next, in order to remove DCE from the carbon nanotube solution sprayed on the quartz substrate, heat treatment is performed at 900 degrees to form a carbon nanotube coating layer. In addition, the p-type dopant according to Examples 1 to 4 and Comparative Example was spin-coated on the carbon nanotube coating layer to form a p-type dopant coating layer.

On the other hand, in order to determine the thermal stability of the carbon nanotube transparent film according to Examples 1 to 4, Comparative Example, heat treatment for 1 hour in air at 150 degrees.

First, referring to FIG. 4, which is a graph of measuring sheet resistance change after heat treatment, after heat treatment, and after 80 days of heat treatment of the carbon nanotube transparent films prepared according to the present Example and Comparative Example. Here, the pristine sample is a carbon nanotube transparent film having a carbon nanotube coating layer which is not doped with a p-type dopant.

Referring to Figure 4, based on the Pristine sample, the change rate of the sheet resistance reduction was better toward T1, T2, T3, T4, T5. AuCl ₃ metal ion dopant showed a 93% change in resistance after doping. T4, a p-type organic precursor, also showed a similar resistance reduction rate of 92.8%.

In order to confirm thermal stability, the resistance reduction rate after heat treatment for 1 hour at 150 ° C. was confirmed to remain unchanged. At this time, the p-type organic precursor includes all of the TFSI to help maintain thermal stability, and the sheet resistance change can be seen according to the cation.

In order to confirm the thermal stability of the heat-treated sample, the sheet resistance was measured after 80 days after doping. Although it showed a slight increase in resistance, it can be seen that it still maintains a maximum resistance reduction rate of 90% compared to the pristine sample.

Referring to FIGS. 5 and 6, which are graphs of sheet resistance changes during 80 days before and after heat treatment of the carbon nanotube transparent films prepared according to the present example and the comparative example, are as follows. 5 is a graph measuring the sheet resistance change for 80 days before heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention. Figure 6 is a graph measuring the sheet resistance change for 80 days after the heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.

As shown in the graphs of FIGS. 5 and 6, it can be seen that the sheet resistance change rate is lower toward T1, T2, T3, T4, and T5. In particular, it can be seen that T4 shows similar thermal stability to T5.

7 is a graph measuring changes in the Rieman spectrum of carbon nanotubes of a carbon nanotube transparent film prepared according to Examples and Comparative Examples of the present invention.

Referring to FIG. 7, the R-man analysis was performed after p-doping using a p-type dopant. 7 shows the G-band coming from the hexagonal structure of carbon nanotubes. At this time, an asymmetric Breit-Wigner-Fano (BMF) line shape appears by electron-phonon coupling near 1545 cm ⁻¹ , which is present in metallic carbon nanotubes. In general, p-doped carbon nanotubes lose electrons near the Fermi level and no longer interact with phonons, causing the BWF line to disappear.

Figure 8 is a graph measuring the change in the Rieman spectrum of carbon nanotubes after heat treatment for the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.

Referring to FIG. 8, R-man analysis was performed to confirm whether the doping effect was maintained by performing p-doping using an p-type organic precursor and performing heat treatment. In the case of T1 and T2, the BWF line recovers a little before and after the heat treatment. In addition, it can be seen that T3, T4, and T5 maintain the BWF line before and after the heat treatment.

In addition, the G + band shown in the graph on the right correlates with the metallic carbon nanotubes and again shows the same trend as the change of the BWF line. This shows the same tendency as the aforementioned sheet resistance change, and it can be seen that among the p-type organic precursors, T4 is the most thermally stable and exhibits a low sheet resistance.

Figure 9 is a SEM photograph of the surface after the heat treatment of the carbon nanotube transparent film prepared according to the Examples and Comparative Examples of the present invention.

Referring to FIG. 9, an SEM image after heat treatment after p-doping using a p-type dopant. The p-type organic precursors T1, T2, and T4 can confirm that the surface is clean after p-doping.

However, in the case of T4 including TFSI as an anion group but Ag as a cation, metal particles may remain on the surface of some carbon nanotube coating layer after doping, such as AuCl ₃ , a metal ion dopant. This may later be a disadvantage in other processes.

In particular, T4 not only has a corresponding doping ability compared to AuCl ₃ , but also shows thermally stable characteristics. In addition, AuCl ₃ has metal particles remaining on the surface of some carbon nanotube coating layer after doping, but T4, an organic precursor of p-type according to the present invention, has an advantage that no residue remains on the surface after doping.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those skilled in the art that other modifications based on the technical idea of the present invention may be implemented.

10: substrate
20: carbon nanotube coating layer
30: p-type organic precursor coating layer
100: carbon nanotube transparent film

Claims (8)

Forming a carbon nanotube coating layer on the substrate;
And coating a p-type organic precursor including TFSI (trifluoromethanesulfonyl) imide (TFSI) on the carbon nanotube coating layer with an anion group.
Coating the p-type organic precursor,
Applying a solution containing the p-type organic precursor to the carbon nanotube coating layer;
And spin coating the applied solution.
The applying step,
Dissolving the p-type organic precursor in an organic solvent to form a dopant solution;
Mixing and heating the dopant solution to uniformly disperse the p-type organic precursor in the organic solvent;
Applying the dopant solution having the p-type organic precursor uniformly dispersed thereon onto the carbon nanotube coating layer;
Method of producing a carbon nanotube transparent film comprising a. Forming a carbon nanotube coating layer on the substrate;
And coating a p-type organic precursor including TFSI (trifluoromethanesulfonyl) imide (TFSI) on the carbon nanotube coating layer with an anion group.
Forming the carbon nanotube coating layer,
Dispersing a certain amount of carbon nanotubes in an aqueous solution containing an organic solvent or a dispersant to form a carbon nanotube solution;
Removing carbon nanotubes not dispersed in the carbon nanotube solution by centrifugation;
Spraying the carbon nanotube solution centrifuged on the substrate;
Heat treating the sprayed carbon nanotube solution to form a carbon nanotube coating layer;
Method of producing a carbon nanotube transparent film comprising a. The organic precursor of claim 1 or 2, wherein the p-type organic precursor is
(CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) ₂ Carbon nano characterized in that one of Method for producing a tube transparent film. According to claim 1 or 2, wherein the carbon nanotubes forming the carbon nanotube coating layer
Carbon comprising at least one of single-walled carbon nanotubes, functionalized single-walled carbon nanotubes, double-walled carbon nanotubes, functionalized double-walled carbon nanotubes, multi-walled carbon nanotubes, functionalized multi-walled carbon nanotubes Method for producing a nanotube transparent film. The method of claim 2, wherein the coating of the p-type organic precursor,
Method of manufacturing a carbon nanotube transparent film, characterized in that the progress by at least one method of spin coating, spray coating, dip coating, roll coating. According to claim 1 or 2, wherein the coating of the p-type organic precursor,
Applying a solution containing the p-type organic precursor to the carbon nanotube coating layer;
And spin coating the applied solution by rotating at 1000 to 3000 rpm for 2 to 10 minutes.
The applying step,
Dissolving the p-type organic precursor in an organic solvent to form a dopant solution;
Mixing and heating the dopant solution to uniformly disperse the p-type organic precursor in the organic solvent;
Applying the dopant solution having the p-type organic precursor uniformly dispersed thereon onto the carbon nanotube coating layer;
Method of producing a carbon nanotube transparent film comprising a. A carbon nanotube coating layer formed on the substrate;
And a p-type organic precursor coating layer coated on the carbon nanotube coating layer and including TFSI as an anion group.
The p-type organic precursor coating layer
P-type organic precursor is dissolved in an organic solvent to form a dopant solution, the dopant solution is mixed and heated to uniformly disperse the p-type organic precursor in the organic solvent, and the p-type organic precursor. The uniformly dispersed dopant solution is carbon nanotube transparent film, characterized in that formed by applying a droplet on the carbon nanotube coating layer, and then spin coating the applied solution. The method of claim 7, wherein
The p-type organic precursor of the p-type organic precursor coating layer is (CF ₃ SO ₂ ) 2 NH, (CF ₃ SO ₂ ) ₂ NAg, C ₇ H ₃ ClF ₆ N ₂ O ₄ S ₂ , C ₆ H ₅ N (SO ₂ CF ₃ ) The carbon nanotube transparent film, characterized in that one of _two .

Images