WO2003054110A1 - Phosphor and method for production thereof and plasma display device - Google Patents
Phosphor and method for production thereof and plasma display device Download PDFInfo
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- WO2003054110A1 WO2003054110A1 PCT/JP2002/013361 JP0213361W WO03054110A1 WO 2003054110 A1 WO2003054110 A1 WO 2003054110A1 JP 0213361 W JP0213361 W JP 0213361W WO 03054110 A1 WO03054110 A1 WO 03054110A1
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- phosphor
- oxide
- green
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- plasma display
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/08—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials
- C09K11/59—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing silicon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/08—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials
- C09K11/59—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing silicon
- C09K11/592—Chalcogenides
- C09K11/595—Chalcogenides with zinc or cadmium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/08—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/54—Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
- H01J1/62—Luminescent screens; Selection of materials for luminescent coatings on vessels
- H01J1/63—Luminescent screens; Selection of materials for luminescent coatings on vessels characterised by the luminescent material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/42—Fluorescent layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J2211/20—Constructional details
- H01J2211/34—Vessels, containers or parts thereof, e.g. substrates
- H01J2211/42—Fluorescent layers
Definitions
- the present invention relates to a color television receiver for displaying characters or images, a plasma display panel using gas discharge light emission used for a display or the like.
- PDP plasma display device
- a display device using a plasma display panel (hereinafter referred to as a PDP) has attracted attention as a large, thin, and lightweight color display device. Have been.
- PDPs perform full-color display by additively mixing the so-called three primary colors (red, green, and blue).
- the PDP is provided with a phosphor layer that emits each of the three primary colors red (R), green (G), and blue (B).
- the phosphor constituting the phosphor layer is provided.
- the particles are excited by ultraviolet light generated in the discharge cells of the PDP, and generate visible light of each color.
- the reason for crushing and classifying the phosphor particles is that a screen printing method is generally used, in which a phosphor layer is formed on a PDP, using phosphor particles of each color as a paste.
- a smaller and uniform particle size makes it easier to obtain a cleaner coated surface.
- the smaller the particle size of the phosphor the more uniform and the shape is closer to a sphere, the cleaner the coating surface, the higher the packing density of the phosphor particles in the phosphor layer, and the larger the emission surface area of the particles.
- the instability of the PDP is also improved, and it is theoretically thought that the brightness of the PDP can be increased.
- the conventional Z n 2 S I_ ⁇ 4: M n phosphors has many defects near the surface, when the phosphor layer is formed using a method of coating a phosphor Inki from the nozzle, There was also a problem that the organic binder reacted with the phosphor and caused nozzle clogging.
- the present invention has been made in view of the above problems, and by suppressing defects (mainly oxygen defects) in a green phosphor, adsorption of a hydrocarbon-based gas or water on the surface of the green phosphor is suppressed, and the phosphor has It is intended to improve luminance degradation, chromaticity change, and discharge characteristics. Disclosure of the invention
- the present invention includes a PDP in which a plurality of discharge cells of one or more colors are arranged, a phosphor layer of a color corresponding to each discharge cell is provided, and the phosphor layer emits light when excited by ultraviolet rays.
- a plasma display apparatus, fluorescent body layers, Z n 2 S I_ ⁇ 4 is excited by ultraviolet rays to emit visible light: having a green phosphor comprising a crystal structure of Mn, the green phosphor 1 parts is a plasma display device obtained by substituting the monovalent oxide, the monovalent oxide, acid lithium (L i 2 ⁇ ), sodium oxide (N a 2 0), oxidizing power potassium (K 2 ⁇ ), cesium oxide (C s 2 0), rubidium oxide (R b 2 ⁇ ), copper oxide (C u z O), is set to any one or more of the silver oxide (Ag 2 0).
- FIG. 1 is a plan view showing a PDP according to an embodiment of the present invention, from which a front glass substrate is removed.
- FIG. 2 is a perspective view showing the structure of the image display area of the PDP.
- FIG. 3 is a block diagram showing a plasma display device according to one embodiment of the present invention.
- FIG. 4 is a sectional view showing the structure of a PDP image display area according to the present invention.
- FIG. 5 is a schematic configuration diagram of an ink application device used when forming a phosphor layer in the present invention.
- Phosphors used in PDPs and the like are produced by a solid-phase reaction method, an aqueous solution reaction method, or the like, but defects tend to occur as the particle diameter decreases. In particular, it is known that in the solid-phase reaction, many defects are generated by crushing the phosphor after firing. Also, the wavelength generated by the discharge when driving the panel
- ultraviolet light of 147 nm causes defects in phosphors (for example, IEICE Technical Report, EID 990—2004, January 27, 2007). ).
- M n is 1 the phosphor itself, in addition to the above defects by adding an excess of S i 0 2 with respect to Z n 0 1 0 0 ° C ⁇ 1 Since it is fired at 300, it is configured to be particularly susceptible to oxygen defects (Phosphor Handbook, pp. 220, 1962, Ohmsha Co., Ltd.).
- the present inventors have found that the essence of the luminance degradation of the green phosphor does not only occur due to the presence of a defect, but that the hydrocarbon gas selectively adsorbs to the defect (mainly an oxygen defect).
- the phosphor reacts with these gases to cause luminance degradation and color shift.
- hydrocarbon-based gas and carbonation gas to oxygen vacancies near Zn— ⁇ and Si—O in the green phosphor.
- Z n 2 S i 0 4 green phosphor having a crystal structure of the Mn (Z 2 S i 0 4 to 1 valent oxide M 2 ⁇ (where M is, L i, N a, K , R b, C s, C u, any one or more of the Ag) was added, green By replacing a part of the phosphor with a monovalent oxide, oxygen vacancies were reduced, and as a result, luminance degradation of the green phosphor and address discharge mistakes were reduced (discharge characteristics were improved).
- the method for producing the phosphor body includes a conventional solid-phase reaction method in which a raw material of oxide or carbonate is sintered using a flux, hydrolysis of an organic metal salt or nitrate in an aqueous solution,
- the precursor of the phosphor is prepared using the coprecipitation method of adding and precipitating, followed by a liquid phase method of heat treatment, or by spraying an aqueous solution containing the raw material of the phosphor into a heated furnace.
- a method of manufacturing a phosphor such as a liquid spray method is conceivable. 6
- a method of producing a green phosphor by a solid-phase reaction method will be described.
- Z n 0, S i 0 2, Mn C 0 3, M 2 0 were however M is L i, N a, K, R b, C s, C u, any one or more of the Ag First, carbon oxides and oxides such as the above are first used in the composition of the phosphor base material [( ⁇ 2 S i 0 4 ], Z n ⁇ , S i ⁇ 2 , and M n C ⁇ 3 are blended, and then [( ⁇ ⁇ ,., ⁇ ,) 2 S i 0 4 ] after mixing the M 2 0 0.
- the phosphor contains elements (Zn, Si, Mn, Li, K, Na, Rb, Cs, Cu, Ag)
- an organic metal salt for example, alkoxydacetylacetone
- nitrate for example, alkoxydacetylacetone
- hydrolyze it to form a coprecipitate (hydrate) and crystallize it in an autoclave.
- the powder obtained by firing in air or spraying in a high-temperature furnace is once crushed, and then fired again in air at 110 ° C to 130 ° C for 2 hours to emit fluorescent light. Body.
- (Z n ⁇ MnJ 2 S i 0 4 amounts to replace the monovalent oxide M 2 0
- 0. 0 0 1w t% ⁇ 0 . 5w t% is desirable.
- Substitution amount was 0.0 0 If it is less than 1 wt%, there is no effect of preventing luminance degradation and address error, and if it is more than 0.51:%, it becomes an impurity and the luminance of the phosphor decreases.
- a green phosphor that is resistant to carbonation gas is obtained.
- the particle size of the green phosphor particles is as small as 0.05 to 3 m, the particle size distribution is good, and if the shape of the phosphor particles forming the phosphor layer is spherical, the packing density is further increased. And the emission area of the phosphor particles that substantially contributes to emission is increased. Therefore, it is possible to obtain a plasma display device having excellent brightness characteristics by improving the brightness of the PDP and suppressing the brightness deterioration and the color shift. '
- the average particle size of the phosphor particles is preferably in the range of 0.1 lm to 2.Om, and the particle size distribution is such that the maximum particle size is 4 times or less of the average value and the minimum value is 1 Z4 or more of the average value. Is preferred.
- the region where the ultraviolet rays reach the phosphor particles is as shallow as several hundred nm from the particle surface, and almost only emits light on the surface.If the particle size of such phosphor particles becomes 2.0 xm or less, light emission occurs. The surface area of the contributing particles increases, and the luminous efficiency of the phosphor layer is kept high. If the thickness is 3.0 xm or more, the thickness of the phosphor is required to be 20 m or more, and a sufficient discharge space cannot be secured. On the other hand, if the value is not more than 0, defects easily occur, and the luminance is not improved.
- the thickness of the phosphor layer is within the range of 8 to 25 times the average particle size of the phosphor particles, a sufficient discharge space can be secured while maintaining high luminous efficiency of the phosphor layer. Therefore, the brightness of the PDP can be increased. In particular, when the average particle size of the phosphor is 3 / m or less, the effect is large.
- the concrete phosphor particles used for a green phosphor layer of PDP (Z ⁇ ,., ⁇ ⁇ 2 S i ⁇ 4 was used as a base, which in the monovalent oxide M 2 0 (provided that M can be a compound obtained by substituting Li, Na, K, Rb, Cs, Cu, and Ag) by 0.001 wt% to 0.5 wt%. It is preferable that the value of X in the phosphor is 0.01 ⁇ X ⁇ 0.2 because of excellent luminance and luminance deterioration.
- the value of X in the compound of the red phosphor is preferably 0.55 ⁇ X ⁇ 0.20, which is excellent in luminance and luminance deterioration, and is preferable.
- method for producing a PD P according to the invention on a substrate of one of the panel, (Z ni _ x Mn x ) 2 S i 0 4 green phosphor phosphor particles children were partially substituted with a monovalent oxide , And red and blue phosphor particles and vine
- An arranging step of arranging a paste comprising: a sintering step of eliminating the binder contained in the paste arranged on the panel; and a panel in which the phosphor particles are arranged on the substrate by the sintering step.
- FIG. 1 is a schematic plan view of the PDP with a front glass substrate removed
- FIG. 2 is a partial cross-sectional perspective view of an image display area of the PDP. Note that in FIG. 1, the number of display electrode groups, display scan electrode groups, Some parts are omitted from the figure for easy understanding. The structure of the PDP will be described with reference to both figures.
- the PDP 100 has a front glass substrate 101 (not shown), a rear glass substrate 102, N display electrodes 103, and N display scans.
- the electrode 104 (the number is indicated when the N-th line is indicated), the M address electrodes 107 (the number is indicated when the M-th line is indicated), and the hermetic seal layer 12 1 indicated by oblique lines It has a three-electrode matrix consisting of electrodes 103, 104, and 107, and a cell is formed at the intersection of the display scan electrode 104 and the address electrode 107. I have.
- the front glass substrate 101 and the rear glass substrate 102 form a discharge space 122 and a display area 123.
- this PDP 100 has a display electrode 103, a display scan electrode 104, a dielectric glass layer 105, and MgO protection on one main surface of the front glass substrate 101.
- a front panel on which a layer 106 is disposed, and an address electrode 107, a dielectric glass layer 108, a partition wall 109, and a phosphor layer 110R on one main surface of a rear glass substrate 102 , 110 G, 110 B are attached to the back panel, and discharge gas is sealed in the discharge space '122 formed between the front panel and the back panel.
- This is connected to the PDP driving device 150 shown in FIG. 3 to constitute a plasma display device.
- a display driver circuit 153, a display scan driver circuit 154, and an address driver circuit 155 are connected to each electrode of the PDP 100, and the controller 1
- a voltage is applied to the display scan electrode 104 and the address electrode 107 to perform an address discharge therebetween, and then the display electrode 103 and the display scan are performed.
- Apply a pulse voltage between electrodes 104 And a sustain discharge is performed. Due to the sustain discharge, ultraviolet rays are generated in the cells, and the phosphor layers excited by the ultraviolet rays emit light, thereby lighting the cells. An image is displayed by a combination of lighting and non-lighting of each color cell. Is done.
- N display electrodes 103 and display scan electrodes 104 are alternately and parallelly arranged on the front glass substrate 101.
- an Mg protection layer 106 is formed on the surface of the dielectric glass layer 105.
- the display electrode 103 and the display scan electrode 104 are electrodes made of silver, and are formed by applying a silver paste for an electrode by screen printing and then firing.
- the dielectric glass layer 105 is formed by applying a paste containing a lead-based glass material by screen printing and then baking it at a predetermined temperature for a predetermined time, for example, at 560 ° C. for 20 minutes. (About 20 im).
- the paste containing a glass material of the lead-based for example, P b O (7 0w t% ), ⁇ 2 0 3 (1 5 wt%), S i 0 2 (1 0 wt%), and A 1 2 0
- organic pinda 10% ethyl alcohol dissolved in pinole all night
- the organic binder is obtained by dissolving a resin in an organic solvent.
- an acryl resin as a resin and butyl carbitol as an organic solvent can be used.
- a dispersant such as glyceryl trioleate may be mixed with such an organic binder.
- the protective layer 106 is made of magnesium oxide (Mg ⁇ ), and its layer is determined by, for example, sputtering or CVD (chemical vapor deposition). It is formed to have a thickness (about o. 5 im).
- the back panel is formed by first screen printing silver paste for an electrode on the back glass substrate 102, and then firing the silver paste to form a state in which M address electrodes 107 are arranged.
- a base containing a lead-based glass material is applied thereon by a screen printing method to form a dielectric glass layer 108, and a paste containing the same lead-based glass material is also applied at a predetermined pitch by a screen printing method.
- baking is performed to form partition walls 109. By the partition walls 109, the discharge space 122 is divided into one cell (unit light emitting region) in the line direction.
- FIG. 4 is a cross-sectional view of the PDP 100.
- the gap dimension W of the partition wall 109 is set to a fixed value, for example, about 130 m to 240 m for an HD-TV of 32 inches to 50 inches.
- red (R), blue (B) and (Z ⁇ , ⁇ ⁇ ,) Z n in 2 S i 0 4, S i , Mn A paste-like phosphor ink composed of green (G) phosphor particles in which the ions are replaced with monovalent element ions and an organic binder is applied, and this is applied at a temperature of 400 to 590 ° C.
- the phosphor layers 110 R, 110 G, and 110 B formed by binding the respective phosphor particles are formed.
- the thickness L of the phosphor layers 11 OR, 110 G, and 110 B in the stacking direction on the paddle electrode 107 is about 8 to 25 times the average particle size of the phosphor particles of each color. It is desirable to do. That is, in order to secure the luminance (luminous efficiency) when the phosphor layer is irradiated with a certain amount of ultraviolet light, the phosphor layers 110 R, 110 G and 110 B are formed in the discharge space 122 It is desirable that the phosphor particles have a thickness of at least 8 layers, and preferably about 20 layers, in order to absorb the ultraviolet rays generated in the layer without transmitting them.
- the phosphor layer 110R, 110G, 1 This is because the luminous efficiency of 10 B is almost saturated, and if the thickness exceeds about 20 layers, the size of the discharge space 122 cannot be sufficiently secured. Further, if the particle size is sufficiently small and spherical, such as phosphor particles obtained by a hydrothermal synthesis method, even if the number of layers is the same as compared to the case where non-spherical particles are used, As the degree of filling of the phosphor layer increases and the total surface area of the phosphor particles increases, the surface area of the phosphor particles contributing to actual light emission in the phosphor layer increases, and the luminous efficiency further increases. A method for synthesizing the phosphor layers 110R, 110G, and 110B, and a method for producing green phosphor particles in which monovalent ions used for the green phosphor layer are substituted will be described later.
- the front panel and the rear panel manufactured in this way are overlapped so that the electrodes of the front panel and the address electrodes of the rear panel are orthogonal to each other, and a sealing glass is interposed at the periphery of the panel, and this is applied, for example. It is sealed by firing at about 450 ° C. for 10 to 20 minutes to form an airtight seal layer 121. Then, once the discharge space 1 2 2 in a high vacuum, for example, 1. IX 1 0 - After evacuating the 4 P a, a discharge gas, for example, 116- 6 system, the N e-X e based inert gas PDP 100 is produced by sealing at a predetermined pressure.
- FIG. 5 is a schematic configuration diagram of an ink coating device 200 used when forming the phosphor layers 110 R, 110 G, and 110 B.
- the ink application device 200 includes a server 210, a pressure pump 220, a header 230, and a phosphor supplied from a server 210 that stores phosphor ink.
- the ink is supplied under pressure to the header 230 by a pressure pump 220.
- the header 230 is provided with an ink chamber 230a and a nozzle 240.
- the phosphor ink supplied to the ink chamber 230a under pressure is continuously supplied from the nozzle 240.
- the diameter D of the nozzle 240 is 30 m or more to prevent clogging of the nozzle, and the distance W between the partition walls 109 (about 130 ⁇ m) to prevent the nozzle 240 from protruding from the partition wall during coating. m ⁇ 200 m), and is usually set to 30 xm to 130 m.
- the header 230 is configured to be linearly driven by a header scanning mechanism (not shown), and scans the header 230 and continuously discharges the phosphor ink 250 from the nozzle 240. As a result, the grooves between the partitions 109 on the rear glass substrate 102 are uniformly coated with the phosphors.
- the viscosity of the phosphor used is kept in the range of 150 to 3000 centipoise (CP) at 25 ° C.
- the server 210 is provided with a stirrer (not shown), and the stirring prevents precipitation of particles in the phosphor ink.
- the header 230 is integrally formed including the portion of the ink chamber 230a and the nozzle 240, and is manufactured by subjecting a metal material to machine processing and electric discharge machining.
- the method for forming the phosphor layer is not limited to the above method, but includes various methods such as a photolithography method, a screen printing method, and a method of disposing a film in which phosphor particles are mixed.
- the phosphor ink that can be used is a mixture of phosphor particles of each color, a binder, and a solvent, and is prepared so as to have a CP of 1500 to 300,000 as required.
- a surfactant, silica, and a dispersant (0.1 lwl: ⁇ 5wt%) may be added.
- Ethyl cellulose mono-acrylic resin is used as a binder to be mixed with the phosphor (mixture of 0.1 to 10 wt% of the ink), and ⁇ -terpineol and butyl carbitol are used as solvents. Can be. Note that polymers such as ⁇ and PVA are used as binders, and Organic solvents such as glycol and methyl ether can also be used.
- a compound represented by E u x is used . These are compounds in which a part of the Y element constituting the base material is replaced by Eu.
- the substitution amount X of the Eu element with respect to the Y element is preferably in the range of 0.05 ⁇ X ⁇ 0.20. If the replacement amount is larger than this, the luminance increases but the luminance deteriorates remarkably, so that it cannot be used practically. On the other hand, if the substitution amount is less than this, the composition ratio of Eu, which is the emission center, decreases, and the luminance decreases, so that it cannot be used as a phosphor.
- a monovalent oxide M 20 (where M is at least one of Li, Na, K, Rb, Cs, Cu, and Ag) is 0.000. 1w t% ⁇ 0. 5 to wt% substituted (Z ⁇ ,., ⁇ , ) 2 S i 0 compound represented by 4 is found using.
- the (Z ⁇ , ⁇ ⁇ ,) is 2 S i 0 4, a compound which is partially substituted with Mn of Z n elements constituting the host material.
- the substitution amount X of the Mn element with respect to the Zn element is preferably in the range of 0.01 ⁇ X ⁇ 0.20.
- the blue phosphor, B x Mg A 1 1 ( ) 0 17: E u x or B a ⁇ x, - y S r y Mg A 1 10 O 17: a compound represented by E u x is used.
- the substitution amount X of the Eu element with respect to the Ba element is 0.03 ⁇ X ⁇ 0.20, 0.1 ⁇ Y ⁇ 0 for the former blue phosphor for the same reason as described above. It is preferably within the range of 5.
- the phosphor particles those produced by a solid-phase reaction method, an aqueous solution method, a spray firing method, or a hydrothermal synthesis method are used.
- the mixed solution preparing step as a raw material, nitrate Bariumu B a (N_ ⁇ 3) 2, magnesium nitrate Mg (N0 3) 2, aluminum nitrate A 1 (N0 3) 3, europium nitrate E u (N0 3) 2 are mixed so that the molar ratio becomes 11: X: 1: 10: X (0.03 ⁇ X ⁇ 0.25), and this is dissolved in an aqueous medium to prepare a mixed solution.
- This aqueous medium is preferably ion-exchanged water or pure water in that it does not contain impurities, but can be used even if these contain a non-aqueous solvent (methanol, ethanol, etc.).
- the hydrated mixture is placed in a container made of a corrosion-resistant and heat-resistant material such as gold or platinum, and is heated in a high-pressure container using a device that can be heated while applying pressure, such as an autoclave.
- Hydrothermal synthesis is performed at a temperature (100 ° C (: up to 300 ° C) and a predetermined pressure (0.2MPa to 10MPa) for 12 to 20 hours.
- this powder is calcined in a reducing atmosphere, for example, in an atmosphere containing 5% of hydrogen and 95% of nitrogen at a predetermined temperature for a predetermined time, for example, at 135 ° C. for 2 hours, and then classified.
- desired blue phosphor by B ⁇ ⁇ ⁇ g a 1 10 O 17:. it is possible to obtain the E u x.
- Phosphor particles obtained by performing hydrothermal synthesis have a spherical shape and an average particle size of 0.05 to 2.0 m compared to those produced by a conventional solid-phase reaction. It can be formed as small as about m.
- the term “spherical” as used herein is defined so that the ratio of the axis diameter of most fluorescent particles (short axis diameter / long axis diameter) is, for example, 0.9 or more and 1.0 or less. However, not all of the phosphor particles need be in this range.
- the hydration mixture may be sprayed from a nozzle into a high-temperature furnace without using a gold or platinum container to synthesize the phosphor.
- a blue phosphor can be produced.
- the raw materials used will be described.
- barium hydroxide Ba (OH) 2 , sodium hydroxide Sr (OH) 2 , magnesium hydroxide Mg (OH) 2 , aluminum hydroxide A 1 (OH) 2 , europium hydroxide Eu ( OH) 2 is weighed out to the required molar ratio, and these are mixed with A 1 F 3 as a flux, at a predetermined temperature (130 ° C.
- the average particle size of the phosphor particles obtained by this method is about 0.1 to 3.0 m.
- this is calcined in a reducing atmosphere, for example, in an atmosphere of 5% hydrogen and 95% nitrogen at a predetermined temperature (100 ° C. to 160 ° C.) for 2 hours, and then is passed through an air classifier. Therefore, classification is performed to produce a phosphor powder.
- a reducing atmosphere for example, in an atmosphere of 5% hydrogen and 95% nitrogen at a predetermined temperature (100 ° C. to 160 ° C.) for 2 hours, and then is passed through an air classifier. Therefore, classification is performed to produce a phosphor powder.
- Oxides, nitrates, and hydroxides were mainly used as raw materials for the phosphor, but organometallic compounds containing elements such as Ba, Sr, Mg, A1, and Eu, such as metal alkoxides, were used. Phosphors can also be produced using acetylaceton or the like.
- Te mixture preparation step smell which is a raw material, nitrate Bariumu B a (N0 3) 2, aluminum nitrate A 1 (N 0 3) 2 , manganese nitrate Mn (N0 3 ) 2 is mixed so that the molar ratio is 1 _X: 1 2: X (0.01 ⁇ X ⁇ 0.10), and this is dissolved in ion-exchange water to prepare a mixed solution. .
- a hydration solution of a monovalent oxide M 20 (M is Li, Na, K, Rb, Cs, Cu, Ag) was prepared, and the amount of the addition was relative to the phosphor.
- aqueous solutions are mixed with each other so as to be 0.001 wt% to 0.5 wt%.
- a hydrate is formed by dropping a basic aqueous solution, for example, an aqueous ammonia solution, into the mixed solution.
- the hydrate and ion-exchanged water are put into a capsule made of a corrosion-resistant and heat-resistant material such as platinum or gold, and are then placed in a high-pressure vessel using, for example, an autoclave.
- Temperature, predetermined pressure for example, temperature of 100 ° (: up to 300 ° C, pressure of 0.2 MPa to 10 MPa, for a predetermined time, for example, water heat for 2 hours to 20 hours Perform synthesis.
- the phosphor obtained by this hydrothermal synthesis step has a particle size of about 0.1 lm to 2.0 m and a spherical shape. Next, this powder is annealed in air at 800 ° ((130 ° C.), and then classified to obtain a green phosphor.
- a basic aqueous solution for example, an aqueous ammonia solution is added to the aqueous solution to form a hydrate.
- the hydrate and ion-exchanged water are placed in a container made of a material having corrosion resistance and heat resistance, such as platinum or gold, and the temperature is set at 100 ° C. in a high-pressure container using, for example, an autoclave. ° C to 300 ° (: The hydrothermal synthesis is performed for 3 to 12 hours under the conditions of pressure of 0.2 MPa to 10 MPa. Then, the obtained compound is dried to obtain desired Y 2 _ x 0 3:.
- the phosphor obtained has a particle size of about 0.1 to 2.0 and a spherical shape. Is suitable for forming a phosphor layer having excellent emission characteristics.
- the red and blue phosphor layers of the PDP described above are phosphors that have been used in the past, and the phosphor layer for green is ( ⁇ ⁇ x Mn x ) 2 Using replaced by phosphor particles in S i 0 4 an oxide having a monovalent element.
- the conventional green phosphor has a greater deterioration of hydrocarbon-based gas and water in each process than the green phosphor of the present invention, and thus tends to have a lower luminance when emitting green light.
- the green phosphor according to the present invention when the green phosphor according to the present invention is used, the luminance of the green cell is increased, and the deterioration during the panel manufacturing process is small, so that the color shift and the address discharge error do not occur.
- the brightness at the time of white display can be increased, and the use of the green phosphor according to the present invention prevents clogging even when the phosphor ink is applied to the inside of the partition wall using a thin nozzle. No phosphor can be applied.
- Each manufactured plasma display device has a size of 42 inches (HD-TV specification with a rib pitch of 150 m), the thickness of the dielectric glass layer is 20 m, and the thickness of the MgO protective layer is 0. 5 zm, and the distance between the display electrode and the display scan electrode was 0.08 mm.
- the discharge gas sealed in the discharge space is a gas in which neon is mainly mixed with xenon gas at 5%, and is sealed at a predetermined discharge gas pressure.
- Table 1 shows the synthesis conditions. l> 0 H- 1
- Sample No. 11 is a comparative example
- the substitution amount and type of monovalent oxide with respect to 2 S i ⁇ 4 are changed as shown in Table 1.
- the phosphor ink used to form the phosphor layer was prepared by using each phosphor particle shown in Table 1 and mixing a phosphor, a resin, a solvent, and a dispersant.
- the diameter of the nozzle used for coating at this time was 100 / zm, and the average particle size of the phosphor particles used in the phosphor layer was 0.1 to 3.0 / m, and the maximum particle size was 0.1 to 3.0 / m. Particle sizes of less than 8 m are used for each sample.
- the sample 11 is a sample using conventional phosphor particles in which monovalent oxide is not specifically substituted for the green phosphor particles.
- the luminance change (deterioration) rate of the green phosphor before and after the panel laminating step (sealing step: 450 ° C., 20 minutes) in the panel manufacturing process was measured.
- the rate of change in luminance degradation during white display and green display when the panel is lit is measured by applying a sustaining pulse with a voltage of 200 V and a frequency of 50 kHz to the plasma display device for 200 hours.
- the panel luminance before and after the application was continuously measured, and the luminance change rate ( ⁇ [the luminance after the application—the luminance before the application] the luminance before the Z application> X100) was determined from the panel luminance.
- Table 2 shows the results of these experiments 1 to 4 for the green luminance and the rate of change in luminance deterioration, and the results of nozzle clogging.
- Sample No. 11 is a comparative example
- the present invention is a plasma display device provided with a phosphor layer of a color corresponding to each discharge cell, wherein the phosphor layer is excited by ultraviolet rays to emit visible light.
- Luminescent Zn 2 Si 0 4 A plasma display device that has a green phosphor having a crystal structure of Mn, and a part of the green phosphor is replaced with a monovalent oxide. the objects, lithium oxide (L i 2 0), sodium oxide (N a 2 0), potassium oxide (K 2 ⁇ ) oxide Ceci ⁇ beam (C s 2 ⁇ ), rubidium oxide (R b 2 0), copper oxide (C u 2 0), is set to any one or more of the silver oxide (Ag 2 0).
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Luminescent Compositions (AREA)
- Gas-Filled Discharge Tubes (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020037010106A KR100550721B1 (ko) | 2001-12-21 | 2002-12-20 | 형광체, 그의 제조방법 및 플라즈마 디스플레이 장치 |
| EP02786170A EP1457544A4 (en) | 2001-12-21 | 2002-12-20 | "FLUORATE, METHOD FOR THE PRODUCTION THEREOF AND PLASMA DISPLAY DEVICE" |
| US10/478,857 US7147802B2 (en) | 2001-12-21 | 2002-12-20 | Phosphor and method for production thereof and plasma display device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001389143A JP4092911B2 (ja) | 2001-12-21 | 2001-12-21 | プラズマディスプレイ装置の製造方法 |
| JP2001-389143 | 2001-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003054110A1 true WO2003054110A1 (en) | 2003-07-03 |
Family
ID=19188233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2002/013361 Ceased WO2003054110A1 (en) | 2001-12-21 | 2002-12-20 | Phosphor and method for production thereof and plasma display device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7147802B2 (ja) |
| EP (1) | EP1457544A4 (ja) |
| JP (1) | JP4092911B2 (ja) |
| KR (1) | KR100550721B1 (ja) |
| CN (1) | CN1263823C (ja) |
| WO (1) | WO2003054110A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1580785A4 (en) * | 2003-09-26 | 2009-09-16 | Panasonic Corp | PLASMA DISPLAY AND METHOD FOR PRODUCING THE PHOSPHORUS USED IN THE DISPLAY |
| CN110628423A (zh) * | 2019-10-09 | 2019-12-31 | 厦门大学 | 一种氧硫化物弹性应力发光材料及其制备方法 |
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| CN103773363A (zh) * | 2013-12-17 | 2014-05-07 | 中国计量学院 | 一种锰激活硅酸锌绿色荧光粉及其制备方法 |
| CN108428802B (zh) * | 2018-03-27 | 2020-11-03 | 京东方科技集团股份有限公司 | 一种显示面板及其封装方法、oled装置 |
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- 2001-12-21 JP JP2001389143A patent/JP4092911B2/ja not_active Expired - Fee Related
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- 2002-12-20 WO PCT/JP2002/013361 patent/WO2003054110A1/ja not_active Ceased
- 2002-12-20 US US10/478,857 patent/US7147802B2/en not_active Expired - Fee Related
- 2002-12-20 KR KR1020037010106A patent/KR100550721B1/ko not_active Expired - Fee Related
- 2002-12-20 EP EP02786170A patent/EP1457544A4/en not_active Withdrawn
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1580785A4 (en) * | 2003-09-26 | 2009-09-16 | Panasonic Corp | PLASMA DISPLAY AND METHOD FOR PRODUCING THE PHOSPHORUS USED IN THE DISPLAY |
| CN110628423A (zh) * | 2019-10-09 | 2019-12-31 | 厦门大学 | 一种氧硫化物弹性应力发光材料及其制备方法 |
| CN110628423B (zh) * | 2019-10-09 | 2020-11-20 | 厦门大学 | 一种氧硫化物弹性应力发光材料及其制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1457544A8 (en) | 2004-11-10 |
| KR100550721B1 (ko) | 2006-02-08 |
| CN1263823C (zh) | 2006-07-12 |
| JP2003183649A (ja) | 2003-07-03 |
| KR20030074763A (ko) | 2003-09-19 |
| EP1457544A4 (en) | 2008-04-02 |
| EP1457544A1 (en) | 2004-09-15 |
| US7147802B2 (en) | 2006-12-12 |
| US20040150338A1 (en) | 2004-08-05 |
| CN1498256A (zh) | 2004-05-19 |
| JP4092911B2 (ja) | 2008-05-28 |
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