CN103788951A - Phosphor used for PDP and preparation method - Google Patents
Phosphor used for PDP and preparation method Download PDFInfo
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- CN103788951A CN103788951A CN201110459510.1A CN201110459510A CN103788951A CN 103788951 A CN103788951 A CN 103788951A CN 201110459510 A CN201110459510 A CN 201110459510A CN 103788951 A CN103788951 A CN 103788951A
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- pdp
- fluorescent material
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- rare earth
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Abstract
The invention discloses a phosphor used for PDP and a preparation method. A chemical formula of the phosphor is RPO4: Gdx, wherein, x is less than or equal to 0.20 and greater than or equal to 0.005, and R is rare earth metal. The invention relates to a phosphor used for PDP, which is based on Gd<3+>-doped RPO4, Gd<3+> ion can realize the two-photon emission at 313nm and 595nm, physicochemical property of phosphate is stable, and phosphate is capable of resisting bombardment of vacuum ultraviolet photon, and has strong absorption in a range of 140-190nm, accordingly, the phosphor used for PDP has strong absorption in the range of 140-190nm, and simultaneously, the emitted visible light can be used for plasma flat display.
Description
Technical field
The present invention relates to field of gas discharge, in particular to a kind of fluorescent material for PDP and preparation method thereof.
Background technology
Plasma flat-plate technique of display (Plasma Display Panel) is a kind of under driving circuit control, utilize the ultraviolet ray (mainly in 147 nanometers and 172 nanometers) of xenon (Xe) base rare gas, mixed gas plasma discharge generation to excite the luminous a kind of flat panel display of three primary colors fluorescent powder, visual angle is wide owing to having for PDP, the life-span is long, refresh rate is fast, light efficiency and many good characteristics become the at present important giant-screen such as brightness is high, easily make giant-screen, working range is wide, ultra-thin display mode it
In recent years, it is more and more higher that the requirement of energy-conserving and environment-protective shows that for plasma flat-plate the power consumption of (PDP) device requires, and therefore reduces the power consumption of device in the urgent need to improving the light efficiency of PDP.As everyone knows, PDP utilizes fluorescent material that a vacuum ultraviolet photon is converted into a light photon, energy efficiency is very low, wherein more than 65% energy is with hot form consumption, therefore will fundamentally improve the light efficiency of PDP, the energy efficiency that improves fluorescent material is a kind of efficient manner, that is to say and passes through quantum-cutting, fluorescent material absorbs a vacuum ultraviolet photon transmitting two or above optical photon, and this mode will greatly improve the light efficiency of PDP.
Quantum-cutting fluorescent material application is at present the most successfully Gd
3+-Eu
3+doped fluoride system, the Phonon frequency of fluorochemical is little, can realize higher quantum yield, but fluoride system is not high in 140～190nm scope assimilated efficiency, and fluorochemical is unstable, be not easy preparation, thereby cause device unstable, therefore, in the urgent need to can effectively absorbing 140～190nm scope vacuum-ultraviolet light, the quantum-cutting fluorescent material of the stable performance of transmitting visible ray.
Summary of the invention
The present invention aims to provide a kind of fluorescent material for PDP and preparation method thereof, to solve in prior art the low or technical problem quietly not of fluorescent material light efficiency for PDP.
To achieve these goals, according to an aspect of the present invention, provide a kind of fluorescent material for PDP.The chemical formula of this fluorescent material is RPO
4: Gd
x, wherein, 0.005≤x≤0.20, R is rare earth metal.
Further, rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more.
A kind of preparation method of the above-mentioned fluorescent material for PDP is provided according to another aspect of the present invention.This preparation method comprises the following steps: 1) according to chemical formula RPO
4: Gd
xin the mol ratio of each element take R
2o
3, Gd
2o
3, and phosphoric acid salt, wherein, 0.005≤x≤0.20, R is rare earth metal; 2) the above-mentioned each feed composition taking is mixed, in 1100-1500 ℃ of pre-burning 1～5 hour, products therefrom made fluorescent material through grinding, washing, filtration, baking step.
Further, rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more.
Further, phosphoric acid salt is ammonium phosphate salt.
Further, phosphoric acid salt is Secondary ammonium phosphate.
Further, each feed composition remix after pre-grinding is even
Fluorescent material for PDP of the present invention, based on Gd
3+the RPO of doping
4, due to Gd
3+ion is realized the two-photon transmitting at 313nm and 595nm place, phosphoric acid salt physico-chemical property is stable, the bombardment of ability vacuum ultraviolet photon, and there is stronger absorption in 140～190nm scope, therefore, make this fluorescent material for PDP both have strong absorption at 140～190nm, the visible ray of transmitting can be applied to plasma flat demonstration simultaneously.
Accompanying drawing explanation
Figure of description is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows and monitors emission wavelength according to the fluorescent material for PDP of embodiment of the present invention emmission spectrum under the monitoring emission wavelength excitation spectrum that is 313nm, 172nm optical excitation with the commercial blue powder of PDP is 445nm excitation spectrum comparison diagram; And
Fig. 2 shows under 172nm optical excitation, according to the fluorescent material for PDP of the embodiment of the present invention and commodity (Y, Gd) BO
3: Eu
3+the emmission spectrum contrast figure of red illuminating material.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The typical embodiment of one according to the present invention, this chemical formula that is used for the fluorescent material of PDP is RPO
4: Gd
x, wherein, 0.005≤x≤0.20, R is rare earth metal.This is used for the fluorescent material of PDP, based on Gd
3+the RPO of doping
4, due to Gd
3+ion is realized the two-photon transmitting at 313nm and 595nm place, phosphoric acid salt physico-chemical property is stable, the bombardment of ability vacuum ultraviolet photon, and there is stronger absorption in 140～190nm scope, therefore, make this fluorescent material for PDP both have strong absorption at 140～190nm, the visible ray of transmitting can be applied to plasma flat demonstration simultaneously.
Preferably, rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more, these several elements have can effectively regulate parent lattice size, sensitized luminescence does not affect the photochromic advantage of light-emitting phosphor simultaneously.
According to another aspect of the present invention, a kind of typical embodiment according to the present invention, the preparation method of the above-mentioned fluorescent material for PDP comprises the following steps: 1) according to chemical formula RPO
4: Gd
xin the mol ratio of each element take R
2o
3, Gd
2o
3, and phosphoric acid salt, wherein, 0.005≤x≤0.20, R is rare earth metal; 2) the above-mentioned each feed composition taking is mixed, in 1100-1500 ℃ of pre-burning 1～5 hour, products therefrom made fluorescent material through grinding, washing, filtration, baking step.This fluorescent material synthesis step is simple, easy handling, and synthesis material is nontoxic, environmental protection.
Preferably, rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more.
Preferably, phosphoric acid salt is ammonium phosphate salt, because ammonium ion can be discharged with the form of gas in the process of sintering, can in fluorescent material, not introduce other impurity element.Preferably, phosphoric acid salt is Secondary ammonium phosphate, and Secondary ammonium phosphate decomposition temperature is low, and pyrolytic decomposition is introduced high reaction activity phosphate anion, makes solid state reaction more abundant.
A kind of typical embodiment according to the present invention, each feed composition remix after pre-grinding is even, is convenient to sintering abundant.
Further illustrate beneficial effect of the present invention below in conjunction with embodiment.
RPO
4:Gd
x 0.005≤x≤0.20
Take Scium trioxide (Sc
2o
3) 0.00475mol, gadolinium sesquioxide (Gd
2o
3) 0.00025mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1350 ℃ of sintering 3 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Take yttrium oxide (Y
2o
3) 0.004875mol, gadolinium sesquioxide (Gd
2o
3) 0.000125mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1500 ℃ of sintering 1 hour, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Take gadolinium sesquioxide (Gd
2o
3) 0.005mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1100 ℃ of sintering 5 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Embodiment 4
Take lanthanum trioxide (La
2o
3) 0.004mol, gadolinium sesquioxide (Gd
2o
3) 0.001mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1200 ℃ of sintering 4 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Embodiment 5
Take lutecium oxide (Lu
2o
3) 0.00475mol, gadolinium sesquioxide (Gd
2o
3) 0.00025mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1500 ℃ of sintering 3 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Take Scium trioxide (Sc
2o
3) 0.004975mol, gadolinium sesquioxide (Gd
2o
3) 0.000025mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1100 ℃ of sintering 3 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Embodiment 7
Take yttrium oxide (Y
2o
3) 0.0045mol, gadolinium sesquioxide (Gd
2o
3) 0.0005mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1400 ℃ of sintering 5 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Embodiment 8
Take gadolinium sesquioxide (Gd
2o
3) 0.004mol, gadolinium sesquioxide (Gd
2o
3) 0.001mol, Secondary ammonium phosphate ((NH
4)
2hPO
4) 0.01mol, after fully grinding in agate mortar and mixing, 1100 ℃ of sintering 4 hours, are chilled to room temperature, and sample is taken out and ground, and with deionized water wash, filter, and dry, and finally obtain product.
Emmission spectrum test
As shown in Figure 1, to monitor emission wavelength with the commercial blue powder of PDP be 445nm excitation spectrum comparison diagram to the fluorescent material for PDP of the embodiment of the present invention 1 emmission spectrum under the monitoring emission wavelength excitation spectrum that is 313nm, 172nm optical excitation; Fig. 2 is under 172nm optical excitation, the fluorescent material for PDP of the embodiment of the present invention 1 and commodity (Y, Gd) BO
3: Eu
3+the emmission spectrum contrast figure of red illuminating material.
The presentation of results of Fig. 1 and Fig. 2, the fluorescent material for PDP of the present invention has the following advantages:
1. the present invention has stronger absorption for the fluorescent material 172nm place of PDP, and under 172nm optical excitation, there is stronger two-photon transmitting, show that the vacuum-ultraviolet light that this fluorescent material can be produced by the xenon base rare gas plasma discharge in the PDP device of main application at present efficiently excites, and meets the requirement of PDP application.
2. as a comparison, under identical test condition, emmission spectrum under 172nm optical excitation shows, fluorescent material of the present invention can be launched two photons, wherein the photo emissions intensity of 313nm has reached three times of commercial PDP blue powder, and the red photons intensity that is positioned at 595nm place has reached 40% of commercial PDP rouge and powder.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. for a fluorescent material of PDP, it is characterized in that, the chemical formula of described fluorescent material is RPO
4: Gd
x, wherein, 0.005≤x≤0.20, R is rare earth metal.
2. fluorescent material according to claim 1, is characterized in that, described rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more.
3. a preparation method for the fluorescent material for PDP described in claim 1 or 2, is characterized in that, comprises the following steps:
1) according to chemical formula RPO
4: Gd
xin the mol ratio of each element take R
2o
3, Gd
2o
3, and phosphoric acid salt, wherein, 0.005≤x≤0.20, R is rare earth metal;
2) the above-mentioned each feed composition taking is mixed, in 1100-1500 ℃ of pre-burning 1～5 hour, products therefrom made described fluorescent material through grinding, washing, filtration, baking step.
4. preparation method according to claim 3, is characterized in that, described rare earth metal R is selected from La
3+, Sc
3+, Gd
3+, Lu
3+in one or more.
5. preparation method according to claim 3, is characterized in that, described phosphoric acid salt is ammonium phosphate salt.
6. preparation method according to claim 3, is characterized in that, described phosphoric acid salt is Secondary ammonium phosphate.
7. preparation method according to claim 3, is characterized in that, described each feed composition remix after pre-grinding is even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110459510.1A CN103788951A (en) | 2011-12-31 | 2011-12-31 | Phosphor used for PDP and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110459510.1A CN103788951A (en) | 2011-12-31 | 2011-12-31 | Phosphor used for PDP and preparation method |
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|---|---|
| CN103788951A true CN103788951A (en) | 2014-05-14 |
Family
ID=50665017
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|---|---|---|---|
| CN201110459510.1A Pending CN103788951A (en) | 2011-12-31 | 2011-12-31 | Phosphor used for PDP and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560042A (en) * | 2015-01-13 | 2015-04-29 | 复旦大学 | Trivalent stibium (Sb) and trivalent gadolinium (Gd) co-activated rear earth phosphate narrow-band ultraviolet b (UV-B) emitting fluorescent powder |
| CN105087005A (en) * | 2015-09-06 | 2015-11-25 | 洛阳理工学院 | Gadolinium ion doped yttrium-barium phosphate fluorescent powder and preparation method thereof |
-
2011
- 2011-12-31 CN CN201110459510.1A patent/CN103788951A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| OLIVIER TERRA ET.AL.: "《Preparation and characterization of lanthanum-gadolinium monazites as ceramics for radioactive waste storage》", 《NEW J. CHEM.》 * |
| R.C.ROPP: "《Phosphors Based on Rare Earth Phosphates Fast Decay Phosphors》", 《J.ELECTROCHEM.SOC.:SOLID STATE SCIENCE》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560042A (en) * | 2015-01-13 | 2015-04-29 | 复旦大学 | Trivalent stibium (Sb) and trivalent gadolinium (Gd) co-activated rear earth phosphate narrow-band ultraviolet b (UV-B) emitting fluorescent powder |
| CN104560042B (en) * | 2015-01-13 | 2017-02-22 | 复旦大学 | Trivalent stibium (Sb) and trivalent gadolinium (Gd) co-activated rear earth phosphate narrow-band ultraviolet b (UV-B) emitting fluorescent powder |
| CN105087005A (en) * | 2015-09-06 | 2015-11-25 | 洛阳理工学院 | Gadolinium ion doped yttrium-barium phosphate fluorescent powder and preparation method thereof |
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Application publication date: 20140514 |