TW201448697A - Transparent conductive polymer electrode formed by inkjet printing, display device including the electrode, and method of manufacturing the electrode - Google Patents

Abstract

There are provided a transparent conductive polymer electrode, a display device including the transparent conductive polymer electrode, and a method of manufacturing the temperature. The transparent conductive polymer electrode includes a plurality of electrode lines formed of droplets of conductive polymer, and each of the electrode lines include first and second regions having different conductive polymer droplet hit densities. The first region has a ratio of b/a within a range of 0.2 to 0.8, where ''a'' is a distance from a center to an edge of the electrode line in at least one direction of width and length directions thereof, and ''b'' is a distance from the center to an edge of the first region in the at least one direction. The second region is the remaining region of the electrode line, and the conductive polymer droplet hit density of the second region is lower than that of the first region.

Description

Transparent conductive polymer electrode formed by inkjet printing method, display device containing the same, and method of manufacturing the same

The present invention relates to a transparent conductive polymer electrode formed by an inkjet printing method, a display device including the electrode, and a method of manufacturing the electrode. In particular, the present invention relates to an inkjet printing method in which the adhesion density of conductive polymer droplets sprayed on the electrode lines of the electrode is lowered from the first region to the second region of the electrode line, making it difficult to perceive the electrode line. A transparent conductive polymer electrode formed by the method; a display device comprising the electrode; and a method of manufacturing the electrode.

Transparent electrodes are used in a variety of devices in a variety of fields. For example, the transparent electrode is used for a flat panel display such as a thin film transistor-liquid crystal display (TFT-LCD), a plasma display panel (PDP), and an organic light emitting diode (OLED) display; a touch panel; an electromagnetic shielding film; Antistatic film; heat reflective film; flat heating element; and photoelectric converter.

Transparent electrodes are often formed of indium tin oxide (ITO). However, if a transparent electrode formed of ITO is used for a flexible device, the transparent electrode can be easily broken in the case where stress is applied to the transparent electrodes due to, for example, strain or bending. In addition, since the indium component of ITO is relatively expensive and its mineral content is being depleted, alternative materials must be found.

Therefore, a technique of forming a transparent electrode using a conductive polymer has been attracting attention. Since conductive polymers can be used in a variety of different fields, such as fuel cells, displays, actuators, antistatic conductive coatings, and electromagnetically shielded conductive coatings, extensive research has been conducted on conductive polymers. In particular, a number of academic and industry studies have been conducted on conductive polymer patterning techniques for forming thin film transistors or wiring electrodes in flexible displays in view of next generation displays.

A high speed solution for printing on flexible supports using an ink jet printer has recently been developed as a conductive polymer patterning technique. Figure 1 illustrates a conductive polymer patterning technique using the related art of an ink jet printer. According to the related art conductive polymer patterning technique shown in Fig. 1, the droplets are uniformly sprayed onto the entire area of a pattern. An advantage of this solution using an ink jet printer is that the desired pattern can be quickly formed without waste and the use of an optical mask. However, the solution by this related art can be easily regarded as reducing the visual quality of the display or the touch sensor due to the difference in transmittance between the conductive polymer pattern region and the remaining region.

To overcome this limitation, the thickness of the conductive polymer pattern can be reduced to reduce the difference in light transmittance. However, in this case, the conductivity of the conductive polymer pattern also decreases in proportion to the thickness of the conductive polymer pattern.

Many aspects of the present invention provide a transparent conductive polymer electrode that is relatively inexpensive, easy to manufacture, meets the requirements for electrical conductivity, and is difficult to visually perceive; a display device including the transparent conductive polymer electrode; and a transparent conductive polymer electrode method.

According to an aspect of the present invention, there is provided a transparent conductive polymer electrode comprising a plurality of electrode lines formed by droplets of a conductive polymer, and each electrode line containing a plurality of conductive polymer droplet adhesion densities And a second region, wherein: the first region has a b/a ratio in a range of 0.2 to 0.8, wherein "a" is a distance from the center to the edge of the electrode line in at least one of a width and a length direction thereof, And "b" is the center-to-edge distance of the at least one direction of the first region; the second region is the remaining region of the electrode line, and the conductive polymer droplet adhesion density of the second region is lower than the The first district.

According to other aspects of the invention, a display device comprising the transparent conductive polymer electrode is provided.

According to another aspect of the present invention, there is provided a method of manufacturing a transparent conductive polymer electrode, the method comprising forming a conductive pattern as an electrode line by an inkjet printing method, the electrode wire containing a different conductive polymer droplet adhesion First and second zones of density, wherein: the first zone has a a ratio of b/a in the range of 0.8, wherein "a" is the distance from the center to the edge in at least one of the width and length directions of the electrode line, and "b" is the at least one direction of the first region The distance from the center to the edge; the second region is the remaining region of the electrode line, and the conductive polymer droplet adhesion density of the second region is lower than the first region.

According to these aspects of the invention, the transparent conductive polymer electrode is inexpensive, easy to manufacture, meets the requirements in terms of electrical conductivity, and is difficult to visually recognize, and can provide a display device including the transparent conductive polymer electrode.

Further, according to the method of manufacturing the transparent conductive polymer electrode by the inkjet printing method, the adhesion density of the conductive polymer droplets can be lowered from the first region to the second region of the electrode line (electrode pattern).

A/B/C/D‧‧‧

1 is a view for explaining a conductive polymer patterning method using an inkjet printing method in the related art; and FIG. 2 is a view for explaining a method of forming a conductive polymer electrode according to an embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 4 is a view for explaining a method of forming a conductive polymer electrode according to another embodiment of the present invention; Fig. 5 is for explaining a method of forming a conductive polymer electrode according to another embodiment of the present invention; To explain the formation of conductivity according to another embodiment of the present invention Figure 6 is a diagram illustrating a method of a conductive polymer electrode according to an embodiment of the present invention; and Figure 7 is a view illustrating a conductive polymer electrode according to another embodiment of the present invention; 8 is a view illustrating a conductive polymer electrode according to another embodiment of the present invention; and FIG. 9 is a view illustrating a touch sensor including a transparent conductive polymer electrode according to an embodiment of the present invention. A plurality of electrode lines formed of droplets of a conductive polymer; FIG. 10 is a view illustrating an electrode line pattern of the conductive polymer electrode in Embodiment 1; and FIG. 11 is a diagram illustrating Embodiment 2 FIG. 12 is a view illustrating a pattern of electrode lines of the conductive polymer electrode in Example 3; and FIG. 13 is a diagram illustrating conductivity in Comparative Example 1. A diagram of the electrode line pattern of the polymer electrode.

Hereinafter, specific examples of the present invention will be described in detail with reference to the accompanying drawings. The drawings herein are provided to assist in explaining exemplary embodiments of the invention, and the invention is not limited to the drawings and specific examples. In these figures, the size and length of the components may be enlarged, reduced, or omitted for clarity or conciseness.

The inventors of the present invention have conducted many studies on the development of transparent conductive polymer electrodes having a specific degree of conductivity and being difficult to visually perceive, and thus have proposed transparent conductive polymer electrodes as described in the specific examples of the present invention.

In one aspect, the present invention provides a transparent conductive polymer electrode comprising a plurality of electrode lines formed by droplets of a conductive polymer, wherein an adhesion density of a conductive polymer droplet ejected to form each electrode line is from the electrode The first zone to the second zone of the line are lowered. The first region has a b/a ratio in the range of 0.2 to 0.8, wherein "a" is the center-to-edge distance of the electrode line in at least one of its width and length directions, and "b" is the first The distance from the center to the edge of the at least one direction of the zone. The second zone is the remaining zone of the electrode line. The adhesion density of the conductive polymer droplets is calculated as the number of conductive polymer droplets attached per unit area.

That is, according to a specific example of the present invention, the transparent conductive polymer electrode includes a plurality of electrode lines formed by droplets of a conductive polymer, and the adhesion density of the conductive polymer droplets in each electrode line is from the The first to second regions of the electrode line are lowered.

2 to 8 illustrating a specific example of the present invention, the transparent conductive polymer electrode includes a first region and a second region, and the adhesion density of the conductive polymer droplets from the first region to the first The second zone is lowered, so that the thickness distribution of the electrode wires can be adjusted.

Typically, the thickness of each electrode line of the transparent conductive polymer electrode is proportional to the number of conductive polymer droplets per unit area. Therefore, the thickness of the electrode lines can be adjusted in proportion to the volume of the conductive polymer droplets ejected per square millimeter (mm ² ) of the substrate. For example, if the thickness of the transparent conductive polymer electrode formed by ejecting 100 drops of uniform droplets per square millimeter (mm ² ) is about 54 nm, 50 drops of uniform droplets can be sprayed per square millimeter (mm ² ). A transparent conductive polymer electrode having a thickness of about 27 nm is formed.

In a specific embodiment of the present invention, as described above, the first region of the electrode line has a b/a ratio in the range of 0.2 to 0.8, wherein "a" is the distance from the center to the edge of the electrode line, and "b" is the The center to edge distance of the first zone. The second zone is the remaining zone of the electrode line. The adhesion density of the conductive polymer droplets is calculated as the number of conductive polymer droplets attached per unit area.

As described above, in the specific example of the present invention, the adhesion density of the conductive polymer droplets is lowered from the first region to the second region edge of the electrode line of the transparent conductive polymer electrode. The adhesion density of the conductive polymer droplets in the outermost edge of the second zone may be from about 3% to 60%, or from about 5% to 30, of the adhesion density of the conductive polymer droplets in the first zone. %. In this case, the electrode wire cannot be seen.

In a specific embodiment of the invention, the height (thickness) of the first region of the transparent conductive polymer electrode can be adjusted depending on the ink composition. For example, if the electrode line of the transparent conductive polymer electrode is composed of about 1% by weight of a slightly bluish poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate) (PEDOT:PSS), And an ink of an additional polymeric material that is transparent in visible light, the height of the electrode line being increased depending on the concentration of the additional polymeric material. Even in this case, a desired visual effect can be obtained by appropriately changing the ratio of the thicknesses of the first region and the second region of the electrode line.

On the other hand, if the electrode line of the transparent conductive polymer electrode is formed of an ink which does not contain any additional transparent polymer material, the first region of the electrode line may have a height in the range of 50 nm to 300 nm or 100 nm to 200 nm. In this case, the conductivity of the first region may be high, and the blue line formed by PEDOT:PSS in the electrode line may not be seen, thereby providing good visual quality.

In the transparent conductive polymer electrode of the specific example of the present invention, the pitch of the electrode lines may be proportional to the nozzle diameter of the ink jet head, and may vary depending on the energy characteristics of the surface on which the ink droplets fall. For example, the distance between the electrode lines may be 5 μm to 200 μm, or 50 μm to 120 μm. In this case, the electrode line of the transparent conductive polymer electrode can be easily formed, and the thickness of the transparent conductive polymer electrode can be easily adjusted without the problem of ink droplets overlapping.

In a specific example of the present invention, the conductivity of the transparent conductive polymer electrode may be equal to or less than 500 Ω/cm or equal to or less than 150 Ω/cm. Since the lower resistance level is advantageous, the lower limit of the resistance of the transparent conductive polymer electrode can be 0 Ω/m. The conductivity of the transparent conductive polymer electrode can be calculated from the DC resistance value measured between the two longitudinal ends of the transparent conductive polymer electrode using a tester. If the transparent conductive polymer electrode has a resistance greater than 500 Ω/cm, it may be difficult to use the transparent conductive polymer electrode for the touch sensor due to the required resistance level between the two ends of the touch sensor. .

The transparent conductive polymer electrode may have a light transmittance in the range of 80% to 95%, 85% to 95%, or 90% to 95%. In this case, the penetration Bright conductive polymer electrodes provide good visibility.

In a specific embodiment of the invention, the transparent conductive polymer electrode (ie, the electrode line of the transparent conductive polymer electrode) may be formed of a conductive polymer selected from the group consisting of polyacetylene, polypyrrole, and polyaniline. , poly(p-phenylene extended ethyl) and poly(thiophene) poly(3,4-extended ethylenedioxythiophene). However, the invention is not limited thereto.

In particular, the conductive polymer may include PEDOT:PSS (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)) having the formula 1.

In a specific embodiment of the invention, a transparent conductive ink containing PEDOT:PSS can be used to form a transparent conductive polymer electrode. For example, Clevios ^TM P may be used or other commercially available Agfa Organcon ^TM of the product such as the Heraeus transparent conductive ink.

The transparent conductive ink may be diluted with water or a polar organic solvent to have a solid content of from 0.5% to 5%. In this case, all components of the transparent conductive ink other than the conductive polymer may be a solvent. If the solid content of the transparent conductive ink is within the above range, the transparent conductive polymer The electrode can be easily formed from the transparent conductive ink.

Other aspects of the invention provide a display device or energy generator comprising the transparent conductive polymer electrode. Examples of the display device include an electronic paper, an organic light emitting diode display, an LCD, a three-dimensional image filter, and a touch sensor device. Examples of energy generators include organic photovoltaic cells.

Next, a method of manufacturing a transparent conductive polymer electrode will be described according to a specific example of the present invention.

A further aspect of the present invention provides a method of manufacturing a transparent conductive polymer electrode, the method comprising forming a conductive pattern as an electrode line by an inkjet printing method, wherein the electrode line contains a layer having a different conductive polymer droplet adhesion density One and two districts. The first region has a b/a ratio in the range of 0.2 to 0.8, wherein "a" is the center-to-edge distance of the electrode line in at least one of its width and length directions, and "b" is the first The distance from the center to the edge of the at least one direction of the zone. The second zone is the remaining zone of the electrode line, and the conductive polymer droplet adhesion density of the second zone is lower than the first zone.

According to a specific example of the present invention, the electrode wire can be patterned by various methods such that the adhesion density of the conductive polymer droplets can be lowered from the first region to the second region of the electrode line. Specific examples of the examples are shown in Figures 3 to 5. An exemplary method of adjusting the adhesion density of conductive polymer droplets is described with reference to Figures 3 through 5. 3 to 5 are attached herein to assist in explaining exemplary embodiments of the present invention, and the present invention is not limited thereto.

First, referring to Figure 3, a method of making a transparent conductive polymer pattern is described in accordance with an embodiment of the present invention. For example, as shown in Figure 3, transparent transmission The conductive polymer pattern can be divided into two sub-areas by dividing the width of the electrode line into three regions (the first region in the intermediate region and the second region in the remaining region). That is, zone A and zone B), and droplets of conductive polymer are sprayed into the zones at different intervals. For example, the conductive polymer droplets may be sprayed to the first region at intervals of 30 μm x 30 μm (width × length), sprayed to the A region at intervals of 30 μm x 60 μm (width × length), and at 30 μm x 120 μm (width × Long) is sprayed to zone B. Due to the different spacing in different zones, the thickness of the electrode wire may be thicker at its central portion, and the thickness of the electrode wire may decrease as it approaches the lateral edge of the electrode wire. The terms "width" and "long" are the dimensions measured in the width and length directions of the electrode lines, respectively. Further, the term "interval" means the distance measured between the centers of the conductive polymer droplets. In Figure 3, the diameter of the conductive polymer droplets is equal to the spacing between the conductive polymer droplets. However, the invention is not limited thereto. For example, the spacing between the conductive polymer droplets can be less than the diameter of the conductive polymer droplets, and in this case, the two conductive polymer droplets can form a larger elliptical conductive polymerization. Drops of matter.

In the specific example shown in Figure 3, the spacing between the conductive polymer droplets in the length direction changes. In other embodiments, the spacing of the conductive polymer droplets in both the width and length directions may vary.

4 is a view for explaining a method of manufacturing a transparent conductive polymer pattern according to another embodiment of the present invention. For example, as shown in FIG. 4, the transparent conductive polymer pattern can be divided into a first region (central region) and a second region (the remaining region) by dividing the electrode line in the width direction of the electrode line, and each second The zone is divided into three sub-zones (i.e., zone A, zone B, and zone C), and conductive polymer droplets are sprayed into the zones in different ways. That is, a conductive polymer droplet is sprayed over the entire area of the first region and a portion of the regions A, B, and C.

Figure 5 is a view for explaining a method of manufacturing a transparent conductive polymer pattern according to another embodiment of the present invention. For example, as shown in FIG. 5, the transparent conductive polymer pattern can be divided into a first region (central region) and a second region (the remaining region) by dividing the electrode line in the width direction of the electrode line, and each second region It is divided into three sub-zones (i.e., zone A, zone B, and zone C), and different numbers of conductive polymer droplets are sprayed into the zones. For example, if the number of conductive polymer droplets in the first zone is 100%, the number of conductive polymer droplets in zone A, zone B, and zone C can be 70%, 40%, and 10%, respectively. . That is, in this case, in the direction toward both ends of the electrode line, the blank area where the conductive polymer droplets are not disposed is increased. That is, the thickness of the electrode wire can be made smaller in the directions.

In the specific example illustrated in Figures 3 to 5, each of the second zones is divided into two or three sub-zones. However, the invention is not limited thereto. For example, the second zones may or may not be divided into four or more sub-zones.

In the above method, the transparent conductive polymer electrode is formed using the same conductive polymer as in the description of the transparent conductive polymer electrode, and thus detailed description thereof will not be repeated.

In a method of making a transparent conductive polymer electrode, the electrode lines of the transparent conductive polymer electrode can be patterned into a variety of different cross-sectional shapes. For example, a trapezoidal or curved cross section as shown in FIG. 6 or FIG. 7 can be formed. this Alternatively, the electrode lines may have a non-linear boundary as shown in FIG. However, the invention is not limited thereto.

Example 1 (1) Forming electrode lines on a glass substrate

A glass substrate on which a metal wire having a width of about 10 μm was formed in a mesh shape at intervals of about 500 μm was prepared. The glass substrate has a thickness and a diagonal length of 0.5 mm and about 10 inches. A rectangular electrode pattern (electrode wire) each having a width of about 0.97 mm and a length of about 3 mm was printed on the glass substrate using an ink jet printer. The number of rectangular electrode patterns in the width direction of the glass substrate was 37, and the number of rectangular electrode patterns in the longitudinal direction of the glass substrate was 22. In this way, the electrode lines of the touch sensor are formed (please refer to FIG. 10).

Clevious PH-1000 grade PEDOT:PSS of Heraeus, Germany, is diluted with a solvent mixture prepared by mixing water and propylene glycol in a ratio of 7:3 to obtain a transparent conductive ink having a solid content of 5%, and the transparent conductive ink 0.05% by weight of a fluorosurfactant was added to the ink. A transparent conductive ink prepared in this manner was filled in the ink jet printer to form an electrode pattern as described above.

(2) patterned electrode line

As shown in FIG. 10, rectangular electrode patterns (electrode lines) each having a width of about 0.97 mm and a length of about 3 mm are divided into a first region (a central region of 300 μm width) and a second region (the remaining region) in the width direction thereof. ) and will Each second is divided into three zones (A zone, B zone and C zone). Then, droplets of the transparent conductive ink were sprayed in the entire area of each of the first regions at intervals of 30 μm x 30 μm (width × length).

Next, the droplets of the transparent conductive ink are partially ejected into each of the A zone, the B zone, and the C zone. In detail, the transparent conductive ink droplets were not ejected to the region of the 25 μm wide A region adjacent to the first region, but were ejected to the region of the remaining 120 μm wide A region at intervals of 30 μm x 30 μm (width × length). The transparent conductive ink droplets were not ejected to the region of the 50 μm wide B region adjacent to the A region, but were sprayed to the region of the remaining 60 μm wide B region at intervals of 30 μm x 30 μm (width × length). The transparent conductive ink droplets were not sprayed to the region of the 50 μm wide C region adjacent to the B region, but were sprayed at intervals of 30 μm x 30 μm (width × length) to the region of the remaining 30 μm wide C region. The electrode lines are formed in this way.

That is, in each of the electrode lines, there are three blank strips on which the transparent conductive ink is not ejected in each of the second regions on the left and right sides of the first region. Thereafter, the electrode wires (electrode patterns) were dried at 120 ° C for 20 minutes using a hot plate.

At this time, the ink jet printer is DMP2800 of Dimatix, USA, and the ink jet head of the ink jet printer has 16 nozzles, each of which can eject 10 picoliters (pl) of droplets.

Example 2

Electrode lines were formed in the same manner as in Example 1, but rectangular electrode patterns each having a width of about 0.97 mm and a length of about 3 mm (electrodes) The line) is divided into a first zone and a second zone in the width and length directions of the electrode wire. In detail, as shown in FIG. 11, each electrode line is further divided into a first zone (2.76-mm long central zone) and a second zone (D zone) in the longitudinal direction of the electrode wire.

A region of 0.91 mm wide and 60 μm long adjacent to the first region is left blank so that ink droplets are not ejected therein, and each D is covered with ink droplets at intervals of 30 μm x 30 μm (width × length). The rest of the area.

Therefore, in each of the electrode lines, there are three blank strips on which ink droplets are not ejected in the second region on the left and right sides of each of the first regions, and are located in each of the first regions. In the second zone on the upper and lower sides, there is a blank strip on which the transparent conductive ink is not sprayed. Thereafter, the electrode wires were dried at 120 ° C for 20 minutes using a hot plate.

Example 3

As shown in FIG. 12, the rectangular electrode pattern (electrode line) having a width of about 0.97 mm and a length of about 3 mm is divided into three portions in the width and length direction, and the rectangular electrode pattern is 300 μm wide and 2.4 mm long. The central area is set to the first area, and the remaining area is set to the second area.

The ink droplets were ejected in the first zone in the same manner as in Example 1, and the ink droplets were ejected in the second zone to form a lattice pattern. In detail, the ink droplets of the odd and even rows ejected at intervals of 60 μm in the second region are staggered to form a lattice pattern. Therefore, the electrode wire has an edge region to which the upper portion is applied with ink in the form of a lattice pattern. Thereafter, the electrode wires were dried at 120 ° C for 20 minutes using a hot plate.

Comparative example 1

The electrode lines were formed in the same manner as in Example 1, but as shown in Fig. 13, ink droplet ejection was sprayed at intervals of 30 μm x 30 μm (width × length) over the entire first and second regions of the electrode lines. In the area.

Comparative example 2

The electrode lines were formed in the same manner as in Example 1, except that ink droplet ejection was sprayed at intervals of 50 μm x 50 μm (width × length) in the entire regions of the first and second regions of the electrode lines.

The adhesion density of the ink droplets on the electrode line of Comparative Example 2 was 36% of the adhesion density of the ink droplets on the electrode line of Comparative Example 1.

Experimental example Pattern conductivity measurement

After drying the ink formed on the electrode pattern (electrode line), the conductivity of the electrode patterns was evaluated by measuring the DC resistance between the two longitudinal ends of the electrode patterns using a tester. Considering the required resistance level at both ends of the touch sensor, if the measured DC resistance level is lower than 500 Ω/cm, the conductivity of the electrode pattern is evaluated as good (O), and if the measured DC resistance level is higher than 500 Ω. /cm, the conductivity of the electrode pattern was evaluated as poor (X).

Visibility measurement

Because the visibility is assessed by the naked eye, it is difficult to use meter quantification. Evaluate visibility. Therefore, each of the glass substrates on which the electrode patterns (electrode lines) are formed is placed on a backlight unit capable of uniformly emitting light over a wide range, and the visibility of light passing through the electrode patterns is observed and evaluated into three levels: very Good, good and bad. In detail, if it is difficult to visually perceive the second region of the electrode pattern, the visibility of light passing through the electrode pattern is evaluated to be very good. Even if the electrode pattern is visually perceived by careful observation, the visibility of light passing through the electrode pattern is evaluated as good if the electrode pattern is not a serious visual obstacle under normal conditions. If the electrode pattern is clearly seen under normal conditions and it is not convenient to see through the electrode pattern, the visibility of light passing through the electrode pattern is evaluated as poor.

The measurement or evaluation results of conduction and visibility are shown in Table 1 below.

While the invention has been shown and described with respect to the embodiments of the embodiments of the present invention, it is apparent that modifications and changes may be made without departing from the spirit and scope of the appended claims.

Claims (11)

A transparent conductive polymer electrode comprising a plurality of electrode lines formed by droplets of a conductive polymer, and each electrode line comprises first and second regions having different conductive polymer droplet adhesion densities, wherein The first region has a b/a ratio in the range of 0.2 to 0.8, wherein "a" is the center-to-edge distance of the electrode line in at least one of its width and length directions, and "b" is the first The distance from the center to the edge of the at least one direction of the region, the second region being the remaining region of the electrode line, and the conductive polymer droplet adhesion density of the second region being lower than the first region. The transparent conductive polymer electrode of claim 1, wherein the conductive polymer droplet adhesion density of the second region is 3% to 60% of the first region. The transparent conductive polymer electrode of claim 1, wherein the transparent conductive polymer electrode has a conductivity of 500 Ω/cm or less. The transparent conductive polymer electrode of claim 1, wherein the transparent conductive polymer electrode has a light transmittance of 80% to 95%. The transparent conductive polymer electrode of claim 1, wherein the conductive polymer comprises PEDOT:PSS (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)). A display device comprising the transparent conductive polymer electrode according to any one of claims 1 to 5. The display device of claim 6, wherein the display device comprises a general display and a touch sensor device. A method of manufacturing a transparent conductive polymer electrode, the method comprising forming a conductive pattern as an electrode line by an inkjet printing method, the electrode line comprising first and second regions having different conductive polymer droplet adhesion densities Wherein the first region has a b/a ratio in the range of 0.2 to 0.8, wherein "a" is the distance from the center to the edge of the electrode line in at least one of its width and length directions, and "b" is the a distance from the center to the edge of the at least one direction of the first zone, the second zone being the remaining zone of the electrode line, and the adhesion density of the conductive polymer droplets in the second zone is lower than the first zone The adhesion density of the conductive polymer droplets. The method of claim 8, wherein the adhesion density of the conductive polymer droplets is adjusted by partially spraying the conductive polymer droplets onto the target points arranged at regular intervals, such that the target points are Some lines remain blank without being coated with such conductive polymer droplets. The method of claim 8, wherein the adhesion density of the conductive polymer droplets in the second zone is from 3% to 60% of the adhesion density of the conductive polymer droplets in the first zone. The method of claim 8, wherein the conductive polymer droplets comprise PEDOT:PSS (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)).