KR100590114B1 - Green phosphor composition for plasma display panel and plasma display panel comprising the same - Google Patents

Abstract

The present invention relates to a green phosphor composition for a plasma display panel and a plasma display panel including the same, wherein the green phosphor composition has a long afterglow time and Zn _2-x Mn _x SiO ₄ (0.09 ≦ _x <0.12) and a short afterglow time. Zn _2-x Mn _x SiO ₄ (0.12 ≦ _x ≦ 0.5).

In the plasma display panel of the present invention, Zn _2-x Mn _x SiO ₄ (0.09≤x <0.12) and Zn _2-x Mn _x SiO ₄ (0.12≤x≤0.5) having different afterglow times may be controlled by controlling Mn content. By including the green phosphor composition or the phosphor layer containing the excellent color purity, brightness, lifetime and afterglow characteristics.

Plasma display panel, green phosphor, color purity, luminance, lifetime, afterglow

Description

Green phosphor composition for a plasma display panel and a plasma display panel including the same {GREEN PHOSPHOR COMPOSITION FOR PLASMA DISPLAY PANEL AND PLASMA DISPLAY PANEL COMPRISING THE SAME}

1 is an exploded perspective view showing an example of a plasma display panel of the present invention.

[Industrial use]

The present invention relates to a green phosphor composition for a plasma display panel (PDP) and a plasma display panel including the same, and more particularly, to color purity, luminance, and the like of a zinc silicate-based (Zn ₂ SiO ₄ : Mn) green phosphor. The present invention relates to a green phosphor composition for a plasma display panel having an improved afterglow and lifespan characteristics by complementing its lifespan and afterglow characteristics, and a plasma display panel including the same.

[Private Technology]

The plasma display panel is a display device using a plasma phenomenon, and discharge occurs when at least one potential difference is applied between two spatially separated contacts in a gas atmosphere in a non-vacuum state, which is called a gas discharge phenomenon.

A plasma display element is a flat panel display element which applied such gas discharge phenomenon to image display. A plasma display panel generally used at present is a reflective AC drive plasma display panel, and in the case of a bottom plate structure, a phosphor layer is formed on a partition wall.

In order for the plasma display panel to exhibit a uniform and stable discharge, the surface potential of the phosphor is high, and high temperature gaseous anions must collide with the phosphor layer at high speed. The higher the surface potential of the phosphor, the greater the potential difference between the phosphor and the anion, thereby realizing a plasma discharge exhibiting uniform and stable light emission characteristics. These phosphors are manufactured by mixing solid powder raw materials and firing them at a high temperature. The surface potential of the phosphors may vary depending on the composition and raw material properties of the phosphors thus prepared.

In particular, the zinc silicate-based (Zn ₂ SiO ₄ : Mn) green phosphor, which is most widely used as a green phosphor for plasma display panels, varies in color purity, brightness, lifetime, and afterglow depending on the concentration of Mn. If the afterglow time is shortened by adjusting the Mn concentration of the phosphor, it is disadvantageous in color purity, luminance and lifetime, and if the afterglow time is long, afterglow is visually observed on the panel.

The Zn ₂ SiO ₄ : Mn green phosphor can be prepared by mixing solid raw materials of ZnO, SiO ₂ , MnCO ₃ , whereby a product with an intermediate or non-uniform composition ratio is formed, unlike surface phosphors such as red and blue phosphors. Has a negative charge. This affects the potential of the surface of the phosphor layer in the panel, so that the wall charges are accumulated during the reset discharge of a typical plasma display driving. At this time, the cations, which are wall charges accumulated on the surface, are absorbed and offset from the surface of the green phosphor. This results in raising the address discharge voltage added for discharge in the next address discharge period. That is, since the green phosphor has a lower surface potential than the red and blue phosphors, a high discharge voltage is required. Therefore, studies are being conducted to increase the surface potential of the green phosphor to have a surface potential similar to that of the red and blue phosphors.

In order to solve this problem, Korean Patent Publication No. 2001-62387 describes a green phosphor in which Zn ₂ SiO ₄ : Mn and YBO ₃ : Tb are mixed. However, when the YBO ₃ : Tb phosphor is mixed in this way, the afterglow time is increased, and thus the afterglow time of Zn ₂ SiO ₄ : Mn is used. Thus, the mixed phosphor of Zn ₂ SiO ₄ : Mn and YBO ₃ : Tb having reduced afterglow time has worse luminance, lifetime and color coordinate characteristics than when Zn ₂ SiO ₄ : Mn is used alone.

In addition, Korean Patent Laid-Open Publication No. 2000-60401 describes the mixing of Zn ₂ SiO ₄ with a material having a positive potential of magnesium oxide and zinc oxide. However, the phosphor produced by this method can also improve the discharge stability by increasing the charging amount, but there is a problem that the color purity is lowered.

The present invention is to solve the above problems, the object of the present invention is to adjust the Mn content Zn _2-x Mn _x SiO ₄ (0.09≤x <0.12) long afterglow time and Zn _2-x short afterglow time By providing Mn _x SiO ₄ (0.12 ≦ _x ≦ 0.5), there is provided a green phosphor composition for a plasma display panel in which green light emission quality such as color purity, brightness, lifespan, and afterglow characteristics are improved.

Another object of the present invention is to provide a plasma display panel with improved green light emission quality such as color purity, luminance, lifespan, and afterglow characteristics.

In order to achieve the above object, the present invention controls the Mn content to the long decay time _{Zn 2-x Mn x SiO 4} (0.09≤x <0.12) and a shorter decay time _{Zn 2-x Mn x SiO 4} (0.12≤ Provided is a green phosphor composition for a plasma display panel comprising x ≦ 0.5).

The present invention also provides a plasma display panel including a green phosphor layer formed by applying the green phosphor composition to a discharge cell.

Hereinafter, the present invention will be described in more detail.

Green phosphor composition of the present _{invention, Zn 2-x Mn x SiO} 4 represented by (0.09≤x <0.12) the first phosphor, and _{Zn 2-x Mn x SiO 4} (0.12≤x≤0.5) indicated by the second Phosphors.

According to a first preferred embodiment of the invention, the x value in the first phosphor is in the range of 0.09 ≦ x <0.10 and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. A green phosphor composition for a display panel is provided.

According to a second more preferred embodiment of the present invention, the x value in the first phosphor is in the range of 0.10 ≦ x <0.11, and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. A green phosphor composition for a display panel is provided.

According to a more preferred third embodiment of the present invention, the x value in the first phosphor is in the range of 0.11 ≦ x <0.12, and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. A green phosphor composition for a display panel is provided.

The weight ratio of the first phosphor and the second phosphor included in the green phosphor composition of the present invention is preferably 20:80 to 80:20, and more preferably 40:60 to 60:40. If the mixing ratio of any one of the first phosphor and the second phosphor is less than 20, the characteristics of the phosphor do not appear in the PDP panel, so the mixing ratio of any one of the phosphors should be at least 20. In addition, it is possible to minimize the deterioration of panel characteristics by using less second phosphor having a larger x value than the first phosphor having a small x value.

In addition, the particle size of the first phosphor is 1.6 to 2.5㎛ and the particle size of the second phosphor is 1.5 to 2.3㎛, provided that the particle diameter of the first phosphor is larger than the particle diameter of the second phosphor. More preferably, the particle size of the first phosphor is 2.0 to 2.5 μm and the particle size of the second phosphor is 1.5 to 2.0 μm.

It is preferable that the particle size of the first phosphor having a small x value is larger than that of the second phosphor having a large x value. Because they contribute a lot.

The afterglow time of the first phosphor is 10 to 16ms, and the afterglow time of the second phosphor is 6 to 9ms. Preferably the afterglow time of the first phosphor is 11 to 14ms and the afterglow time of the second phosphor is 6 to 8ms, more preferably the afterglow time of the first phosphor is 11 to 13ms and the afterglow time of the second phosphor is 6 to 7 ms. If the afterglow time of the phosphor is out of this range, the mixing ratio and the particle size of the phosphor should be changed, in which case the characteristics of either phosphor will not appear well. Therefore, if the mixing ratio and the particle size ratio is adjusted, it is preferable to adjust the afterglow ratio as described above.

According to a fourth preferred embodiment of the present invention, the x value in the first phosphor is in the range of 0.09 ≦ x <0.10, and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5, A green phosphor composition for a plasma display panel having a particle diameter of 2.3 to 2.5 μm and a particle diameter of the second phosphor is 1.5 to 1.7 μm is provided.

The weight ratio of the first phosphor and the second phosphor is preferably 50:50 to 60:40, the afterglow time of the first phosphor is 14 to 16ms, and the afterglow time of the second phosphor is preferably 6 to 8ms.

According to a fifth preferred embodiment of the present invention, the x value in the first phosphor is in the range of 0.10 ≦ x <0.11, and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5, A green phosphor composition for a plasma display panel having a particle diameter of the first phosphor is 2.1 to 2.3 μm and a particle diameter of the second phosphor is 1.5 to 1.7 μm.

The weight ratio of the first phosphor and the second phosphor is preferably 50:50 to 75:25, the afterglow time of the first phosphor is 12 to 14ms, and the afterglow time of the second phosphor is preferably 6 to 8ms.

According to a sixth more preferred embodiment of the present invention, the x value in the first phosphor is in the range of 0.11≤x <0.12, the x value in the second phosphor is in the range of 0.13≤x≤0.5, A green phosphor composition for a plasma display panel having a particle diameter of 2.3 to 2.5 μm and a particle diameter of the second phosphor is 1.5 to 1.7 μm is provided.

The weight ratio of the first phosphor to the second phosphor is preferably 50:50 to 75:25, the afterglow time of the first phosphor is 10 to 12ms, and the afterglow time of the second phosphor is preferably 6 to 8ms.

According to a more preferred seventh embodiment of the present invention, the x value in the first phosphor is in the range of 0.10 ≦ x <0.11, and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5, The particle size of the first phosphor is 2.1 to 2.3㎛, the particle size of the second phosphor is 1.5 to 1.7㎛, the weight ratio of the first phosphor and the second phosphor is 75:25 green phosphor composition for plasma display panel provided do.

At this time, the afterglow time of the first phosphor is 12 to 14ms and the afterglow time of the second phosphor is preferably 6 to 8ms.

Zn _2-x Mn _x SiO ₄ (x is 0.1 to 0.5), which is a green phosphor for a plasma display panel of the present invention, varies in color purity, luminance, lifetime, and afterglow depending on the concentration of Mn as a light emitting material. Therefore, by controlling the Mn content and mixing phosphors having different color purity, brightness, lifetime, and afterglow, superior characteristics may be obtained when Zn _2-x Mn _x SiO ₄ (x is 0.1 to 0.5) is used alone. .

The present invention mainly uses the first phosphor of Zn _2-x Mn _x SiO ₄ (0.09≤x <0.12), which has good luminance, color purity and long life, and has a small particle diameter and a short afterglow time for shortening the afterglow time. A second phosphor of _2-x Mn _x SiO ₄ (0.12 ≦ _x ≦ 0.5) was added thereto. The second phosphor of Zn _2-x Mn _x SiO ₄ (0.12 ≦ _x ≦ 0.5) having a smaller particle diameter is distributed more on the surface of the fluorescent layer of the panel thus formed. Since the afterglow time is mainly dependent on the surface characteristics of the fluorescent layer, the panel afterglow time is biased toward the second phosphor having a short afterglow time. Thus, the desired short afterglow time can be obtained with minimal effect on other properties. Since this mixing uses the same composition Zn _2-x Mn _x SiO ₄ (x is 0.1 to 0.5), it also has the advantage that there is no deterioration in characteristics due to the mixing.

The green phosphor composition of the present invention may further include a binder resin and a solvent.

Examples of the binder resin and the solvent are as described below, but are not limited thereto.

As the binder resin, an organic binder composed of a polymer having a-(CH ₂ -CH ₂ -CH ₂ ) n- chain and an organic solvent for dissolving the polymer is generally used, and preferably a cellulose resin or an acrylic resin. Or mixtures thereof may be used. As the cellulose-based resin, for example, methyl cellulose, ethyl cellulose, propyl cellulose, hydroxy methyl cellulose, hydroxy ethyl cellulose, hydroxy propyl cellulose, hydroxy ethyl propyl cellulose, nitro cellulose or a mixture thereof may be used. have. As said acrylic resin, For example, poly methyl methacrylate, poly isopropyl methacrylate, poly isobutyl methacrylate, or methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, Hexyl methacrylate, 2-ethyl hexyl methacrylate, benzyl methacrylate, dimethyl amino ethyl methacrylate, hydroxy ethyl methacrylate, hydroxy propyl methacrylate, hydroxy butyl methacrylate, phenoxy 2- Hydroxy propyl methacrylate, glycidyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethyl hexyl acrylate, benzyl acrylate, dimethyl amino ethyl acrylate , With hydroxy Acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, phenoxy copolymer, or a mixture of acrylic monomers such as 2-hydroxypropyl acrylate, glycidyl acrylate can be used. In some cases, the composition may comprise a small amount of inorganic binder. Preferably, the content of the binder resin may be 2 to 8% by weight based on the phosphor paste.

Alcohol, ether, ester, or a mixture thereof may be used as the solvent, more preferably butyl cellosolve (BC), butyl carbitol acetate (BCA), terpineol (terpineol) or mixtures thereof and the like can be used, most preferably a mixed solvent of butyl carbitol acetate and terpineol. If the content of the solvent is too high or too low, the flow characteristics of the composition is not appropriate, the process of forming a green phosphor layer may not be easy. In consideration of this point, the content of the solvent may be 25 to 75 wt% based on the phosphor paste.

In addition, the green phosphor composition of the present invention may further include other additives to improve the flow characteristics, process characteristics and the like. As the additive, for example, various additives such as a photosensitizer, a dispersant, a silicone-based antifoaming agent, a leveling agent, a plasticizer, an antioxidant, and the like may be used alone or in combination, all of which are all used in the art. Commercially available to those skilled in the art.

The green fluorescent substance composition of this invention is apply | coated to the discharge cell of a display panel in paste form. The phosphor paste is prepared by dispersing the green phosphor of the present invention in a vehicle in which a binder resin is dissolved in a solvent.

The plasma display panel of the present invention includes a green phosphor layer formed by applying one of the green phosphor compositions to a discharge cell.

More specifically, the plasma display panel of the present invention comprises: a) a first substrate and a second substrate disposed to face each other; b) a plurality of discharge sustaining electrodes disposed on the address electrodes provided on the first substrate and the second substrate, wherein the X electrodes and the Y electrodes are paired; c) a partition wall disposed in a space between the first substrate and the second substrate and installed on the first substrate to partition the plurality of discharge cells; And d) each of the red, green and blue phosphor layers formed on the bottom surface and the side wall of the discharge cell partitioned by the partition, wherein the green phosphor layer comprises any one of the green phosphor compositions of the present invention.

1 is an exploded perspective view showing an example of a plasma display panel of the present invention. However, the plasma display panel of the present invention is not limited to the structure of FIG. 1. Referring to the drawings, in the conventional plasma display panel, address electrodes 3 are formed in one direction (Y direction in the drawing) on the first substrate 1, and the first substrate covers the address electrodes 3. The dielectric layer 5 is formed in front of (1). A partition wall 7 is formed between the address electrodes 3 on the dielectric layer 5, and phosphor layers 9 of red (R), green (G), and blue (B) colors are formed between the partition walls 7. ) Is located. In this case, the green phosphor layer 9 includes any one of the green phosphor compositions of the present invention.

In addition, a pair of transparent electrodes 13a and bus electrodes 13b are disposed on one surface of the second substrate 11 opposite to the first substrate 1 in a direction orthogonal to the address electrode 3 (the X direction in the drawing). Discharge sustaining electrodes 13 may be formed, and the transparent dielectric layer 15 and the passivation layer 17 may be disposed on the entire second substrate 11 while covering the discharge sustaining electrodes 13. Any one of the paired pairs of discharge sustaining electrodes 13 is called an X electrode and the other is called a Y electrode. As a result, the intersection of the address electrode 3 and the discharge sustaining electrode 13 constitutes a discharge cell.

With this configuration, the address discharge is applied by applying the address voltage Va between the address electrode 3 and any one of the discharge sustaining electrodes 13, and again between the pair of discharge sustaining electrodes (X electrode and Y electrode). When the discharge sustain voltage Vs is applied to the vacuum, vacuum ultraviolet rays generated during the sustain discharge excite the phosphor layer 9 to emit visible light through the transparent front substrate 11.

Hereinafter, preferred embodiments of the present invention are described. However, the following examples are only preferred embodiments of the present invention, and the present invention is not limited to the following examples.

EXAMPLE

Production Example

In order to change the characteristics of the ZSM-based phosphor, a powder having a changed x value in the formula Zn _2-x Mn _x SiO ₄ was prepared. The test results for the lifetime in the plasma display panel means the panel luminance retention after 1000hr.

No. x Phosphor powder Plasma display panel CIE x CIE y Luminance life span Afterglow time (1/10) Particle Size (FSSS) Afterglow time (1/10) life span One x <0.09 0.219 0.713 121% 88% 21 ms 2.4㎛ 24.8 ms 95% 2 x <0.09 0.219 0.713 121% 88% 21 ms 1.9 μm 22.4 ms 94% 3 0.09≤x <0.10 0.225 0.709 114% 83% 16 ms 2.5 μm 17.1 ms 91% 4 0.09≤x <0.10 0.225 0.709 114% 83% 16 ms 1.8㎛ 16.2 ms 90% 5 0.10≤x <0.11 0.232 0.704 108% 80% 13 ms 2.2 μm 13.1 ms 87% 6 0.10≤x <0.11 0.232 0.704 108% 80% 13 ms 1.6 μm 12.7 ms 86% 7 0.11≤x <0.12 0.238 0.700 104% 76% 11 ms 2.3㎛ 10.9 ms 83% 8 0.11≤x <0.12 0.238 0.700 104% 76% 11 ms 1.7 μm 10.2 ms 83% 9 0.12≤x <0.13 0.244 0.698 100% 73% 9 ms 2.3㎛ 8.8 ms 78% 10 0.12≤x <0.13 0.244 0.698 100% 73% 9 ms 1.7 μm 8.5 ms 78% 11 0.13≤x≤0.5 0.251 0.694 93% 68% 6 ms 2.0 μm 5.7 ms 73% 12 0.13≤x≤0.5 0.251 0.694 93% 68% 6 ms 1.5 μm 5.5 ms 72%

Among the phosphors described above, a panel was prepared by mixing a phosphor having a small x value and a large particle size (first phosphor) and a phosphor having a large x value and a small particle size (second phosphor) for color purity, luminance and lifetime.

Example 1

6 parts by weight of ethyl cellulose as a binder was mixed with 100 parts by weight of the mixed solvent of butylcarbitol acetate and terpineol in a weight ratio of 3: 7, and the phosphor powder of # 3 in Table 1 (0.09 ≦ x <0.10, particle diameter of 2.5 μm) And 40 parts by weight of the phosphor powder of # 12 (0.13 ≦ x ≦ 0.5, particle diameter of 1.5 μm) were mixed at a weight ratio of 50:50 to prepare a green phosphor paste.

The prepared phosphor paste was applied to the inside of the discharge cell of the first substrate on which the partition wall was formed, and the first substrate on which the phosphor paste was applied was dried and fired to prepare a green phosphor layer.

In the same manner, phosphor layers of (Y, Gd) BO ₃ : Eu and CaMgSi ₂ O ₆ : Eu were prepared in red and blue discharge cells, respectively.

The plasma display panel was manufactured by assembling, sealing, evacuating, injecting, and aging the panel using the first substrate on which the phosphor layer was formed.

Comparative Example 1

A plasma display panel was manufactured in the same manner as in Example 1, except that a green phosphor layer having a thickness of 20 μm was formed of Zn ₂ SiO ₄ : Mn, which is a green phosphor.

Examples 2 to 7 and Comparative Example 2

A plasma display panel was manufactured in the same manner as in Example 1, except that the green phosphor was mixed with the composition shown in Table 2 below.

First Phosphor Powder (Content) 2nd Phosphor Powder (Content) Example 1 # 3 (50%) # 12 (50%) Example 2 # 5 (75%) # 12 (25%) Example 3 # 5 (50%) # 12 (50%) Example 4 # 5 (25%) # 12 (75%) Example 5 # 7 (75%) # 12 (25%) Example 6 # 7 (50%) # 12 (50%) Example 7 # 7 (50%) # 11 (50%) Comparative Example 1 Zn ₂ SiO ₄ : Mn (100%) _ Comparative Example 2 Zn ₂ SiO ₄ : Mn (50%) YBO ₃ : Tb (50%)

After lighting only the green phosphor layers of the plasma display panels of Examples 1 to 7 and Comparative Examples 1 and 2, the luminance and color coordinates (CIE x, CIE y) was measured. In addition, the lifespan characteristics were evaluated by measuring the panel luminance retention after 1000hr, and the afterglow characteristics were evaluated by measuring the time taken for the light at maximum emission to decrease to 1/10 of the maximum size. It can be said that it is excellent when the life is more than 80%, and the afterglow time is excellent when the afterglow is less than 10ms that is not observed with the naked eye.

The color coordinates, luminance, lifetime, and afterglow time measurement results are shown in Table 3 below.

CIE x CIE y Luminance life span Afterglow time (1/10) Example 1 0.235 0.702 105% 86% 9.3 Example 2 0.239 0.712 112% 86% 9.8 Example 3 0.240 0.704 107% 85% 8.4 Example 4 0.244 0.699 102% 80% 7.1 Example 5 0.241 0.698 103% 82% 9.6 Example 6 0.245 0.697 101% 80% 7.9 Example 7 0.246 0.696 100% 82% 8.3 Comparative Example 1 0.248 0.696 100% 77% 9.2 Comparative Example 2 0.281 0.656 102% 73% 12.1

As shown in Table 3, in Examples 1 to 7, it can be seen that the color purity, brightness, lifespan and afterglow characteristics much better than Comparative Examples 1 and 2.

The plasma display panel of the present invention, adjust the content of Mn to Zn is a long decay time _{2-x Mn x SiO 4 (} 0.09≤x <0.12) and the afterglow time is short _{Zn 2-x Mn x SiO 4} (0.12≤x≤ By including the green phosphor composition or the phosphor layer comprising 0.5) excellent color purity, brightness, life and afterglow characteristics.

Claims (20)

For a plasma display panel comprising a first phosphor represented by Zn _2-x Mn _x SiO ₄ (0.09 ≦ _x <0.12) and a second phosphor represented by Zn _2-x Mn _x SiO ₄ (0.12 ≦ _x ≦ 0.5) Green phosphor composition. The green phosphor composition of claim 1, wherein the x value in the first phosphor is in the range of 0.09 ≦ x <0.10 and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. . The green phosphor composition of claim 1, wherein the x value in the first phosphor is in the range of 0.10 ≦ x <0.11 and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. . The green phosphor composition of claim 1, wherein the x value in the first phosphor is in the range of 0.11 ≦ x <0.12 and the x value in the second phosphor is in the range of 0.13 ≦ x ≦ 0.5. . The green phosphor composition of claim 1, wherein a weight ratio of the first phosphor to the second phosphor is 20:80 to 80:20. The green phosphor of claim 1, wherein the first phosphor has a particle size of 1.6 to 2.5 μm, and the second phosphor has a particle size of 1.5 to 2.3 μm, provided that the first phosphor has a larger particle size than the second phosphor. Composition. The green phosphor composition of claim 1, wherein the afterglow time of the first phosphor is 10 to 16ms and the afterglow time of the second phosphor is 6 to 9ms. The method of claim 1, wherein the x value in the first phosphor is in the range of 0.09≤x <0.10, the x value in the second phosphor is in the range of 0.13≤x≤0.5, The particle size of the first phosphor is 2.3 to 2.5㎛, the particle size of the second phosphor is 1.5 to 1.7㎛ green phosphor composition for a plasma display panel. The green phosphor composition of claim 8, wherein a weight ratio of the first phosphor to the second phosphor is 50:50 to 60:40. The green phosphor composition of claim 8, wherein the afterglow time of the first phosphor is 14 to 16ms and the afterglow time of the second phosphor is 6 to 8ms. The method of claim 1, wherein the x value in the first phosphor is in the range of 0.10≤x <0.11, the x value in the second phosphor is in the range of 0.13≤x≤0.5, The particle size of the first phosphor is 2.1 to 2.3㎛, the particle size of the second phosphor is 1.5 to 1.7㎛ green phosphor composition for a plasma display panel. The green phosphor composition of claim 11, wherein a weight ratio of the first phosphor to the second phosphor is 50:50 to 75:25. 12. The green phosphor composition of claim 11, wherein the afterglow time of the first phosphor is 12 to 14 ms and the afterglow time of the second phosphor is 6 to 8 ms. The method of claim 1, wherein the x value in the first phosphor is in the range of 0.11≤x <0.12, the x value in the second phosphor is in the range of 0.13≤x≤0.5, The particle size of the first phosphor is 2.3 to 2.5㎛, the particle size of the second phosphor is 1.5 to 1.7㎛ green phosphor composition for a plasma display panel. 15. The green phosphor composition of claim 14, wherein a weight ratio of the first phosphor to the second phosphor is 50:50 to 75:25. 15. The green phosphor composition of claim 14, wherein the afterglow time of the first phosphor is 10 to 12ms and the afterglow time of the second phosphor is 6 to 8ms. The method of claim 1, wherein the x value in the first phosphor is in the range of 0.10≤x <0.11, the x value in the second phosphor is in the range of 0.13≤x≤0.5, The particle size of the first phosphor is 2.1 to 2.3㎛, the particle size of the second phosphor is 1.5 to 1.7㎛, The weight ratio of the first phosphor and the second phosphor is 75:25 green phosphor composition for a plasma display panel. 18. The green phosphor composition of claim 17, wherein the afterglow time of the first phosphor is 12 to 14 ms and the afterglow time of the second phosphor is 6 to 8 ms. The green phosphor composition for a plasma display panel according to claim 1, further comprising a binder resin and a solvent. A plasma display panel comprising a green phosphor layer formed by applying the green phosphor composition for plasma display panel according to claim 1.

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