KR20080032473A - Fluorescent paste composition, manufacturing method thereof and plasma display panel using the same, manufacturing method thereof - Google Patents

Abstract

A phosphor paste composition is provided to improve the nominal contrast of a plasma display panel, and to realize an screen image with high clearness in a plasma display panel. A phosphor paste composition comprises: phosphor powder for realizing a color; quantum dot powder having a different color depending on the particle size; and a binder for imparting adhesion to the powder. A red phosphor paste composition comprises quantum dot powder having the largest particle size. A blue phosphor paste composition comprises quantum dot powder having the smallest particle size. A green phosphor paste composition comprises quantum dot powder having a particle size between the particle size in the red phosphor paste and the particle size in the blue phosphor paste.

Description

Phosphor paste composition, manufacturing method thereof and plasma display panel using same and manufacturing method thereof {FLUORESCENT PASTE COMPOSITION, MANUFACTURING METHOD THEREOF AND PLASMA DISPLAY PANEL USING THE SAME, MANUFACTURING METHOD THEREOF}

1 is a cross-sectional view illustrating a general plasma display panel.

Figure 2 is a schematic diagram showing a state in which the quantum dot powder is coated on the phosphor.

3 is a conceptual diagram illustrating the quantum dot powder of FIG. 2.

4 is a schematic block diagram showing a method of manufacturing a phosphor paste composition according to an embodiment of the present invention.

5 is a cross-sectional view illustrating a plasma display panel according to an exemplary embodiment of the present invention.

Figure 6 is a graph comparing the emission rate of the phosphor used in the present invention and the conventional phosphor.

7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

11, 13: 1st, 2nd board | substrate 12: partition walls

14 sustain electrode 15 address electrode

16: upper dielectric layer 17: lower dielectric layer

18: protective film 19: phosphor layer

The present invention relates to a phosphor paste composition, a method for manufacturing the same, and a plasma display panel using the same and a method for manufacturing the same.

In general, a plasma display panel is a display device in which ultraviolet light generated by gas discharge excites a phosphor to generate visible light from the phosphor.

The plasma display panel is composed of discharge cells arranged in a matrix. The discharge cells are arranged in parallel by an upper substrate 1 and a partition wall 2, which are display surfaces of an image, as shown in FIG. It consists of the board | substrate 3.

On the upper substrate 1, a pair of sustain electrodes 4 composed of a transparent electrode 4a and a bus electrode 4b, an upper dielectric layer 6, and a protective film 8 are sequentially formed, and on the lower substrate 3, The sustain electrode pair 4, the address electrode 5 for causing the discharge, and the lower dielectric layer 7 are sequentially formed.

Next, on the lower dielectric layer 7, a phosphor 9 for generating intrinsic color visible light is applied over the partition 2.

The phosphor 9 is excited by vacuum ultraviolet rays of short wavelengths generated during gas discharge to generate visible light of red, green and blue colors.

Thus, in the plasma display panel configured, the phosphor 9 is excited and transitioned by ultraviolet rays generated during plasma discharge to emit light, thereby playing a very important role of emitting visible light of red, green, or blue color.

In general, the phosphor 9 is prepared in the form of a paste. The phosphor paste is composed of a phosphor powder, a binder for imparting viscosity to the phosphor powder, and a solvent.

However, such a phosphor paste has a white surface color when printed and dried between the partitions 2 and then fired.

Therefore, the conventional plasma display panel has a high reflectance of external light due to the white phosphor, which causes a decrease in contrast characteristics.

In general, the plasma display panel refers to bright room contrast as an index for making a bright and clear plasma display panel.

The clear room contrast is becoming more important as it is used as an image quality evaluation item in the plasma display panel, but in order to improve the clear room contrast, a pigment according to the color of the phosphor paste is mixed to lower the reflectance of external light.

However, when the pigment is used in the phosphor paste, the reflectance decreases but white luminance also decreases, thereby causing a bright and clear screen.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a phosphor paste composition, a method for manufacturing the same, and a plasma display panel using the same and a method for manufacturing the same, which can improve the clear room contrast.

Another object of the present invention is to provide a phosphor paste composition capable of realizing a high definition screen, a method of manufacturing the same, and a plasma display panel using the same and a method of manufacturing the same.

Phosphor paste composition according to an embodiment of the present invention for achieving the above object has a different color depending on the size of the particles, the phosphor powder to implement the color, lowering the reflectance of the incident light and increasing the white brightness Quantum dot powder, and characterized in that it comprises a binder for imparting adhesion to the powder.

In addition, the phosphor paste composition according to another embodiment of the present invention is coated on the phosphor powder of any one of the first, second, and third phosphor powders, respectively, red, green, and blue, the first phosphor powder, red The first quantum dot powder, which is red organic or inorganic, having a high luminous rate in the wavelength band, and the second quantum dot, which is coated with the second phosphor powder, and the organic or inorganic green, which has a high luminous rate in the green wavelength band. Powder, a quantum dot powder of any one of the third quantum dot powder which is coated with the third phosphor powder and is an organic or inorganic substance which is blue to have a high emission rate in the blue wavelength band, and a binder which gives adhesion to the powders Characterized in that it comprises a.

In the method of manufacturing a phosphor paste composition according to an embodiment of the present invention, a first step of mixing the phosphor powder and a quantum dot powder (quantum dot) for lowering the reflectance of incident light and increasing white brightness, and the phosphor powder and the quantum And a second step of adding and mixing a binder to the mixture of the dot powders.

Plasma display panel according to an embodiment of the present invention for achieving the above object is formed a plurality of red, green, blue discharge cells including phosphors for emitting red, green, blue light respectively, each of the discharge cells Is characterized in that it comprises a quantum dot powder of organic or inorganic material having the same color as the wavelength band of the light emitted from the phosphor to have a high emission rate in the wavelength band of the light emitted from the phosphor.

In addition, the plasma display panel according to another embodiment of the present invention, the first and second substrates facing a predetermined interval, a plurality of electrodes formed on the surface facing the first substrate and the second substrate, the first substrate and A plurality of partition walls forming first, second, and third cells, which are discharge spaces between the second substrates, and quantums formed in the first cell and being organic or inorganic in red color to have a high emission rate in the red wavelength band; A first phosphor layer comprising dot powder, a second phosphor layer formed in the second cell, the second phosphor layer comprising quantum dot powder which is an organic material or an inorganic material having a high luminous rate in a green wavelength band, and the third cell It is characterized in that it comprises a third phosphor layer formed in the quantum dot powder is an organic or inorganic material that is blue to have a high emission rate in the blue wavelength range.

A method of manufacturing a plasma display panel according to an exemplary embodiment of the present invention for achieving the above object includes forming a first substrate having a first electrode, a second electrode, and first, second, and third cells, which are discharge spaces. Preparing a second substrate having a barrier rib, and printing a first phosphor paste including quantum dot powder, which is a red organic material or an inorganic material, to have a high light emission rate in a red wavelength band, in the first cell. Printing a second phosphor paste comprising a quantum dot powder, which is a green organic or inorganic material, to have a high light emission rate in a green wavelength band in a second cell, in the third cell, to have a high light emission rate in a blue wavelength band Printing a third phosphor paste comprising a quantum dot powder which is a blue organic or inorganic substance, and the first, second and third phosphor pastes Bath and a step of firing, thereby forming a first, second, and third fluorescent layer, and is characterized in that it comprises the step of laminating the first substrate and the second substrate.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings illustrating the configuration and operation of the embodiment of the present invention, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, By the technical spirit of the present invention described above and its core configuration and operation is not limited.

The concept of the present invention is that since the phosphor of the plasma display panel is white, the reflectance of the external light is high and the contrast of the bright room is lowered. Thus, by manufacturing the phosphor including the quantum dot powder which lowers the external light reflectance and increases the white brightness, It is possible to increase the clear room contrast of the plasma display panel.

Here, the first substrate is an upper substrate of a plasma display panel in which a sustain electrode pair consisting of a transparent electrode and a bus electrode, a first dielectric layer, and a passivation layer are sequentially formed, and the second substrate is an address electrode and a bottom plate for generating a discharge electrode pair and a discharge. The lower substrate of the plasma display panel in which the dielectric layers are sequentially formed, wherein the electrode and the dielectric provided in the first substrate are referred to as the first electrode and the first dielectric, and the electrode and the dielectric provided in the second substrate are similar to the second substrate. The electrode will be referred to as a second dielectric.

Figure 2 is a schematic diagram showing a state in which the quantum dot powder is coated on the phosphor.

As shown in FIG. 2, the phosphor 21 according to the present invention is coated with quantum dot powders 22, 23, and 24 on the surface thereof without dyes or pigments, and the quantum dot powders 22, 23, and 24. ) Is attached to the surface of the phosphor 21 to absorb external light (vacuum ultraviolet: VUV) to lower the reflectance and increase the white luminance.

The quantum dot powders 22, 23, and 24 emit light of different colors due to different energy (Eg) band gaps depending on the size of the particles. Accordingly, although blue (B, 22), green (G, 23), and red (R, 24) are all coated in FIG. 2, this is illustrated for better understanding, and the color of each phosphor 21 is illustrated. As such, it should be seen that the quantum dot powders 22, 23, and 24 corresponding to that color are commonly coated. For example, if the phosphor 21 is a blue phosphor, the surface of the phosphor 21 should be coated with blue quantum dot powder 22.

In the embodiment of the present invention will be described in detail with respect to the quantum dot powder (22, 23, 24) is coated on the surface of the phosphor 21 to lower the reflectance to the external light and increase the white brightness.

3 is a conceptual diagram illustrating the quantum dot powder of FIG. 2.

3A is a conceptual diagram illustrating the definition of a quantum dot powder, in which a semiconductor energy band has a valence band, a conduction band, and a band gap therebetween. In the case of quantum dot powder, the energy (Eg) of the prohibition band varies according to the particle size, and thus the color emitted. The smaller the particle size, the larger the energy (Eg) of the ban band, so that the quantum dot powder with a particle size of 10 nm is blue (B), the quantum dot powder with 20 nm is green (G), and the quantum dot powder with 30 nm is It is red (R). Since the quantum dot powder emits light using ultraviolet light (UV) as a source, the quantum dot powder may emit white light with the same fluorescent material upon discharge of the plasma display panel, thereby increasing white luminance.

The quantum dot powder is mainly cadmium selenide coated with ZnS (Zinc sulfide), mainly using group II-VI semiconductor nanocrystals or indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), and cadmium selenide (CdSe) are formed containing at least one.

Figure 3b is a graph showing the change in the optical properties of the ZnS, the absorption and emission spectrum of the ZnS particles. The absorption spectrum on the left is actually from the ultraviolet (UV) region, which is in the 470 nm region, and the emission spectrum on the right can achieve the desired color depending on the size of the ZnS particles. Therefore, as a result, the white luminance can be increased.

Therefore, the phosphor paste composition according to the embodiment of the present invention using the above-described quantum dot powders 22, 23, and 24 is a phosphor powder for implementing color, and a particle size for lowering reflectance of incident light and increasing white luminance. Quantum Dot Powder having a different color according to, and a binder for imparting adhesion to the powder.

The phosphor paste composition of red (R) includes quantum dot powder 24 having the largest particle size, and the phosphor paste composition of blue (R) includes quantum dot powder 22 having the smallest particle size. The green (G) phosphor paste composition includes a quantum dot powder 23 having a particle size smaller than that of the red (R) quantum dot powder and larger than the blue (B) quantum dot powder.

The quantum dot powder has a particle size of 1 to 30 nm and is a cadmium selenide coated with ZnS (Zinc sulfide), mainly using group II-VI semiconductor nanocrystals, or indium gallium arsenide (InGaAs) or indium. One formed of at least one of arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), and cadmium selenide (CdSe) may be used.

The composition ratio of the phosphor paste composition includes 50 to 99.99 wt% of phosphor powder, 0.01 to 35 wt% of quantum dot powder, and 0 to 15 wt% of binder.

In addition, the phosphor paste composition further comprises a solvent for assisting the mixing of the phosphor powder and the quantum dot powder, and a dispersant for assisting the printing of the phosphor powder and the quantum dot powder, wherein the composition ratio of the phosphor paste composition is 20 to 60 wt% phosphor powder, 0.01 to 5 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, and 0 to 5 wt% dispersant.

Phosphor paste composition according to another embodiment of the present invention using the above-described quantum dot powder (22, 23, 24) of the phosphor of any one of the first, second, third phosphor powder to implement red, green, blue, respectively Powder and the first quantum dot powder, which is coated with the first phosphor powder and is an organic or inorganic substance which is red to have a high luminous rate in the red wavelength band, and is coated on the second phosphor powder, and has a high luminous rate in the green wavelength band. A quantum dot powder of any one of a third quantum dot powder which is green to have a green color, and a third quantum dot powder which is coated on the third phosphor powder and which is an organic or inorganic substance which is blue to have a high luminous rate in a blue wavelength band, and It characterized in that it comprises a binder for imparting adhesion to the powders.

Here, the first quantum dot powder has a high emission rate in the wavelength range of 550 ~ 650nm, the second quantum dot powder has a high emission rate in the wavelength range of 500 ~ 600nm, the third quantum dot powder in the 400 ~ 500nm wavelength band It has a high light emission rate, and has a relatively low light emission rate in the remaining wavelength bands.

In this case, the first quantum dot powder is the quantum dot powder having the largest particle size, and the third quantum dot powder is the quantum dot powder having the smallest particle size. Accordingly, the second quantum dot powder has a smaller particle size than the first quantum dot powder and a larger size than the third quantum dot powder.

In detail, the first quantum dot powder has a particle size of 30 nm, the second quantum dot powder has a particle size of 20 nm, and the third quantum dot powder has a particle size of 10 nm.

4 is a schematic block diagram illustrating a method of manufacturing a phosphor paste composition according to an embodiment of the present invention, in which a phosphor powder and a quantum dot powder for lowering reflectance of incident light and increasing white luminance are mixed. A first step 41 and a second step 42 of adding and mixing a binder to the mixture of the phosphor powder and the quantum dot powder.

As shown in FIG. 4, first, 65-99.99 wt% of phosphor powder and 0.01-35 wt% of quantum dot powder are mixed in the first step 41, and then the phosphor powder in the second step 42. And adding and mixing at least one of a solvent for assisting the mixing of the quantum dot powder and a dispersant for assisting the printing of the quantum dot powder and the quantum dot powder, thereby preparing a phosphor paste composition according to an embodiment of the present invention. Can be.

Here, the composition ratio of the phosphor paste composition according to the embodiment of the present invention is 20 to 60 wt% phosphor powder, 0.01 to 5 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, 0 to 5 wt% It can be prepared by mixing a dispersant.

The solvent may be alcohol, glycol, propylene glycol ether, propylene glycol acetate, ketone, BCA, xylene, terpineol, texanol, water and the like. As the dispersant, Acryl-based dispersants having a large dispersing effect are mainly used, and the mixing ratio of the solvent and the dispersant varies depending on the type. These matters can be obtained through experiments.

A plasma display panel using the phosphor paste composition prepared as described above is as follows.

5 is a cross-sectional view showing a plasma display panel using the phosphor paste composition according to an embodiment of the present invention.

As shown in FIG. 5, first and second substrates 11 and 13 are prepared.

Here, the first substrate 11 is an upper substrate, and the second substrate 13 is a lower substrate.

Subsequently, a plurality of sustain electrodes 14 are formed on the first substrate 11, and an upper dielectric layer 16 is formed on the sustain electrodes 14.

A protective film 18 containing MgO is formed on the upper dielectric layer 16.

On the other hand, on the second substrate 13 facing the first substrate 11, a plurality of address electrodes 15 arranged orthogonally to the sustain electrodes 14 of the first substrate 11 are formed, and the address The lower dielectric layer 17 is formed on the electrode 15.

In addition, a plurality of partitions 12 are formed on the lower dielectric layer 17 to form first, second, and third cells, which are formed at a predetermined height, and are discharge spaces 51.

The plurality of red, green, and blue discharge cells 51 including the phosphors 19 emitting the red, green, and blue lights, respectively, have a high luminous rate in the wavelength band of the light emitted from the phosphor 19. It includes quantum dot powder (R, G, B), which is an organic or inorganic substance having the same color as the wavelength of light generated in (19).

Here, the red discharge cell 51a includes the quantum dot powder R having the largest particle size, and the blue discharge cell 51c includes the quantum dot powder B having the smallest particle size. do. Accordingly, the green (G) discharge cell includes a quantum dot powder having a particle size smaller than that of a red quantum dot powder and larger than a blue quantum dot powder.

In this case, each of the quantum dot powder is a cadmium selenide coated with ZnS (Zinc sulfide), II-VI group semiconductor nanocrystals, indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide At least one of (AlGaAs), indium phosphide (InP), and cadmium selenide (CdSe) may be formed.

The particle size of the quantum dot powder is the largest particle size of the quantum dot powder having a color of the red wavelength band, the particle size of the quantum dot powder having a color of the blue wavelength band is the smallest. Accordingly, the size of the particles of the quantum dot powder having the color of the green wavelength band is larger than that of the particles of the quantum dot powder having the color of the blue wavelength band, and the size of the particles of the quantum dot powder having the color of the red wavelength band. Rather than have a small relationship.

The specific particle size of the quantum dot powder having a color of the red wavelength band is 30nm, the size of the particle of the green wavelength band of the quantum dot powder has a particle size of 20nm, the color of the blue wavelength band The banded quantum dot powder has a particle size of 10 nm.

In this case, the composition ratio of the phosphor layer 19 includes 80 to 99.9 wt% of the phosphor powder and 0.01 to 20 wt% of the quantum dot powder.

Looking at the plasma display panel according to the present invention described above in detail as described below.

In the plasma display panel according to the embodiment of the present invention, a plurality of first and second substrates 11 and 13 facing each other and a plurality of surfaces formed on the surfaces of the first and second substrates 11 and 13 facing each other are provided. A plurality of first, second, and third cells 51a, 51b, and 51c which are discharge spaces between the electrodes 15 and 16 and the first and second substrates 11 and 13. The first phosphor layer 19a formed in the barrier ribs 12 and the quantum dot powder R formed in the first cell 51a and being an organic or inorganic material that is red in order to have a high emission rate in the red wavelength band. And a second phosphor layer 19b formed in the second cell 52b and including quantum dot powder (G), which is a green organic material or an inorganic material having a high emission rate in a green wavelength band, and the third It is formed in the cell 51c and contains the quantum dot powder (B) which is an organic substance or an inorganic substance which is blue to have high emission rate in the blue wavelength band. And a third phosphor layer 19c.

Here, the phosphor layers 19a, 19b, and 19c have a reflectance with respect to external light of 50 to 60% or less, and as described above, ZnS (Zinc sulfide) is coated with cadmium selenide, group II-VI semiconductor nano A crystal may be included or formed by including at least one of indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), and cadmium selenide (CdSe). Can be.

Figure 6 is a graph comparing the emission rate of the phosphor used in the present invention and the conventional phosphor.

As shown in Figs. 6A to 6C, each phosphor used in the present invention exhibits a high light emission rate in the light emitting wavelength band, and the light emission rate is relatively low in the remaining wavelength band.

That is, since the red phosphor containing the red pigment shows high reflectance in the red wavelength band and the remaining wavelength band shows low reflectance, not only the contrast of the bright room can be increased, but also the color purity and the color coordinates are improved.

This is because the quantum dot powder itself plays a role of self-luminescence.

In addition to the red phosphor, the green phosphor including the green quantum dots and the blue phosphor including the blue quantum dots can have the same effect as the red phosphor.

Looking at the manufacturing method of the above-described plasma display panel in detail as described below.

FIG. 7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel according to an exemplary embodiment of the present invention, wherein a first substrate having a first electrode, a first electrode, a second electrode, and a third cell are disposed between a second electrode and a discharge space A method of preparing a second substrate having a partition wall to form a 71, and a first phosphor paste including a quantum dot powder, which is a red organic material or an inorganic material having a high luminous rate in a red wavelength band, in the first cell. And a second phosphor paste comprising quantum dot powder, which is an organic material or an inorganic material, which is green to have a high light emission rate in the green wavelength band, and the third cell, blue color in the second cell to have a high light emission rate in the blue wavelength band. A step 72 of printing a third phosphor paste comprising a quantum dot powder, which is an organic or inorganic strip, and drying and firing the first, second and third phosphor pastes. Forming a first, second, and third phosphor layer (73); and bonding the first and second substrates (74).

As shown in FIG. 7, first, a first phosphor paste including quantum dot powder, which is a red organic material or an inorganic material, is printed in a first cell to have a high emission rate in a red wavelength band.

Here, the printing of the first phosphor paste may use screen printing, dispensing, an inkjet method, or the like.

In addition, the quantum dot powder has a high luminescence in the wavelength range of about 550 ~ 650nm, the remaining wavelength range has a relatively low reflectance, specifically, the particle size is 30nm.

Here, the first phosphor paste has a composition ratio of 20 to 60 wt% phosphor powder, 0.01 to 5 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, and 0 to 5 wt% dispersant.

Subsequently, a second phosphor paste containing a quantum dot powder, which is a green or organic material, is green so as to have a high emission rate in the green wavelength band in the second cell.

Here, the quantum dot powder has a high emission rate in the wavelength band of about 500 ~ 600nm, the remaining wavelength band has a relatively low reflectance, specifically, the particle size is 20nm.

In addition, the second phosphor paste has a composition ratio of 20 to 60 wt% phosphor powder, 0.01 to 10 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, and 0 to 5 wt% dispersant.

Next, a third phosphor paste containing quantum dot powder, which is a blue organic or inorganic substance, is printed in the third cell so as to have a high emission rate in the blue wavelength band.

Here, the quantum dot powder has a high light emission rate in the wavelength band of about 400 to 500nm, the remaining wavelength band has a relatively low reflectance, specifically, the particle size is 10nm.

The transferred quantum dot powder mainly uses cadmium selenide coated with ZnS (Zinc sulfide), a group II-VI semiconductor nanocrystal, as a quantum dot, or indium gallium arsenide (InGaAs), indium arsenide (InAs), and aluminum gallium acetate. It is also possible to use one formed of at least one of amide (AlGaAs), indium phosphide (InP), and cadmium selenide (CdSe).

Further, the third phosphor paste has a composition ratio of 20 to 60 wt% phosphor powder, 0.01 to 10 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, and 0 to 5 wt% dispersant.

Then, the first, second and third phosphor pastes are dried and baked to form the first, second and third phosphor layers.

Here, the firing temperature of the phosphor paste is adjusted to about 400 to 600 ° C.

In addition, it is preferable that the first, second and third phosphor layers consist of 65 to 99.99 wt% of phosphor powder and 0.01 to 35 wt% of quantum dots.

Then, the first substrate 11 and the second substrate 13 are bonded together to complete the plasma display panel.

As described above, the phosphor paste composition according to an embodiment of the present invention, a method of manufacturing the same, and a plasma display panel using the same and a method of manufacturing the same are used to form a phosphor using quantum dot powder, which is organic or inorganic, having a color according to the particle size. Since it is manufactured, the reflectance of external light can be reduced and a clear room contrast can be improved.

In addition, the phosphor paste composition according to the present invention, a method for manufacturing the same, and a plasma display panel using the same and a method for manufacturing the same may implement a high-definition screen by improving the emission rate.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (33)

Phosphor powders embodying color; Quantum Dot Powder having a different color depending on the size of the particles; And A binder for imparting adhesion to the powder; phosphor paste composition comprising a. The method of claim 1, wherein the red (R) phosphor paste composition, A phosphor paste composition comprising a quantum dot powder having the largest particle size. The method of claim 1, wherein the blue (R) phosphor paste composition, A phosphor paste composition comprising quantum dot powder having the smallest particle size. The method of claim 1, wherein the green (R) phosphor paste composition, A phosphor paste composition comprising a quantum dot powder having a particle size smaller than that of a red (R) quantum dot powder and larger than a blue (B) quantum dot powder. The method of claim 1, wherein the quantum dot powder, A phosphor paste composition comprising cadmium selenide coated with zinc sulfide (ZnS), which is a group II-VI semiconductor nanocrystal. The method of claim 1, wherein the quantum dot powder, Phosphor paste, characterized in that formed by at least one of indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), cadmium selenide (CdSe) Composition. The method of claim 1, wherein the phosphor paste composition, A phosphor paste composition comprising 50 to 99.99 wt% of phosphor powder, 0.01 to 35 wt% of quantum dot powder, and 0 to 15 wt% of binder. The method of claim 1, wherein the phosphor paste composition, A phosphor paste composition further comprising a solvent for assisting the mixing of the phosphor powder and the quantum dot powder, and a dispersant for assisting the printing of the phosphor powder and the quantum dot powder. The method of claim 8, wherein the phosphor paste composition, A phosphor paste composition comprising 20 to 60 wt% phosphor powder, 0.01 to 5 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, and 0 to 5 wt% dispersant. A phosphor powder of any one of the first, second, and third phosphor powders respectively embodying red, green, and blue; The first quantum dot powder, which is coated with the first phosphor powder and is an organic or inorganic substance that is red to have a high luminous rate in the red wavelength band, is coated on the second phosphor powder, and green is used to have a high luminous rate in the green wavelength band. A band is a quantum dot powder of any one of a second quantum dot powder of organic or inorganic material, a third quantum dot powder of organic or inorganic material which is coated on the third phosphor powder, and has a high luminous rate in the blue wavelength band; And Phosphor paste composition comprising a binder for imparting adhesion to the powder. The method of claim 10, wherein the first quantum dot powder has a high light emission rate in the wavelength range of 550 to 650 nm, the second quantum dot powder has a high light emission rate in the wavelength range of 500 to 600 nm, and the third quantum dot powder is 400. A phosphor paste composition having a high light emission rate in a wavelength range of ˜500 nm, and a remaining light emission rate having a relatively low light emission rate. The method of claim 10, wherein the first quantum dot powder, A phosphor paste composition, characterized in that the particle size is the largest quantum dot powder. The method of claim 10, wherein the third quantum dot powder, A phosphor paste composition, characterized in that the quantum dot powder having the smallest particle size. The method of claim 10, wherein the second quantum dot powder, The particle paste composition, characterized in that the particle size is smaller than the first quantum dot powder and larger than the third quantum dot powder. A first step of mixing the phosphor powder and a quantum dot powder which lowers reflectance of incident light and increases white luminance; And And a second step of adding a binder to the mixture of the phosphor powder and the quantum dot powder and mixing the binder. The method of claim 15, wherein the first step, A method for producing a phosphor paste composition, comprising mixing 65 to 99.99 wt% of phosphor powder and 0.01 to 35 wt% of quantum dot powder. The method of claim 15, wherein the second step, And at least one of a solvent for assisting the mixing of the phosphor powder and the quantum dot powder and a dispersant for assisting the printing of the phosphor powder and the quantum dot powder. The method of claim 15, wherein the phosphor paste composition, 20 to 60 wt% of phosphor powder, 0.01 to 5 wt% of quantum dot powder, 0 to 15 wt% of binder, 30 to 80 wt% of solvent, and 0 to 5 wt% of dispersant. . A plurality of red, green, and blue discharge cells are formed, including phosphors emitting red, green, and blue light, respectively; Each of the discharge cells includes a quantum dot powder, which is organic or inorganic, having a color of the same wavelength band as that of the light emitted from the phosphor so as to have a high emission rate in the wavelength band of the light emitted from the phosphor. panel. The method of claim 19, wherein the red discharge cell, A plasma display panel comprising a quantum dot powder having the largest particle size. The method of claim 19, wherein the blue discharge cell, A plasma display panel comprising quantum dot powder having the smallest particle size. 20. The method of claim 19, wherein the green (G) discharge cell, A plasma display panel comprising a quantum dot powder having a particle size smaller than that of a red (R) quantum dot powder and larger than a blue (B) quantum dot powder. 20. The method of claim 19, wherein each quantum dot powder, A cadmium selenide coated with zinc sulfide (ZnS), which is a group II-VI semiconductor nanocrystal. 20. The method of claim 19, wherein each quantum dot powder, Indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), plasma selenium (CdSe) characterized in that formed by including at least one Foil panel. The method of claim 19, wherein the phosphor layer, A plasma display panel comprising 80 to 99.99 wt% of phosphor powder and 0.01 to 20 wt% of quantum dot powder. First and second substrates facing each other; A plurality of electrodes formed on an opposite surface of the first substrate and the second substrate; A plurality of partitions forming first, second, and third cells that are discharge spaces between the first substrate and the second substrate; A first phosphor layer formed in the first cell and including a quantum dot powder, which is an organic material or an inorganic material that is red in order to have a high emission rate in a red wavelength band; A second phosphor layer formed in the second cell and including quantum dot powder, which is an organic material or an inorganic material, which is green to have a high emission rate in a green wavelength band; And And a third phosphor layer formed in the third cell and comprising a quantum dot powder, which is a blue organic or inorganic material having a high luminous rate in a blue wavelength band. The method of claim 26, wherein the phosphor layer, A plasma display panel having a reflectance with respect to external light of 50 to 60% or less. The method of claim 26, wherein the phosphor layer, A cadmium selenide coated with zinc sulfide (ZnS), the plasma display panel comprising a group II-VI semiconductor nanocrystals. The method of claim 26, wherein the phosphor layer, Indium gallium arsenide (InGaAs), indium arsenide (InAs), aluminum gallium arsenide (AlGaAs), indium phosphide (InP), plasma selenium (CdSe) characterized in that formed by including at least one Foil panel. Preparing a second substrate having a first substrate having a first electrode and partition walls forming first, second, and third cells serving as a second electrode and a discharge space; Printing a first phosphor paste including a quantum dot powder, which is a red organic material or an inorganic material, to have a high emission rate in a red wavelength band in the first cell; Printing a second phosphor paste in the second cell, the second phosphor paste comprising a quantum dot powder, which is a green organic material or an inorganic material, to have a high emission rate in a green wavelength band; Printing a third phosphor paste including quantum dot powder, which is a blue organic material or an inorganic material, to have a high emission rate in a blue wavelength band in the third cell; Drying and firing the first, second, and third phosphor pastes to form first, second, and third phosphor layers; And And bonding the first substrate and the second substrate to each other. The method of claim 30, wherein the printing of the first, second, third phosphor paste, A method of manufacturing a plasma display panel comprising at least one method selected from among screen printing, dispensing, and inkjet printing. The calcination temperature of the first, second and third phosphor pastes according to claim 30, It is 400-600 degreeC, The manufacturing method of the plasma display panel characterized by the above-mentioned. The method of claim 30, wherein the first, second, third phosphor paste, 20 to 60 wt% phosphor powder, 0.01 to 5 wt% quantum dot powder, 0 to 15 wt% binder, 30 to 80 wt% solvent, 0 to 5 wt% dispersant. .

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