CN102492422A - Green emitting phosphor for white-light LEDs and preparation method thereof - Google Patents
Green emitting phosphor for white-light LEDs and preparation method thereof Download PDFInfo
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- CN102492422A CN102492422A CN2011104117913A CN201110411791A CN102492422A CN 102492422 A CN102492422 A CN 102492422A CN 2011104117913 A CN2011104117913 A CN 2011104117913A CN 201110411791 A CN201110411791 A CN 201110411791A CN 102492422 A CN102492422 A CN 102492422A
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Abstract
The invention discloses a green emitting phosphor for white-light LEDs and a preparation method thereof, which belong to the field of phosphor materials. The technical scheme aims to prepare alkaline-earth metal phosphorus silicate mixed with Eu2+, the chemical formula is Ca7-7xEu7xSi2P2016, wherein the x in the formula is the mixing quantity of the Eu2+ and is larger than or equal to 0.0001 and smaller than or equal to 1.0. By means of solid-phase sintering and sol gelling, the green emitting phosphor for the white-light LEDs is formed after being sintered for 5 to 15 hours at the temperature ranging from 1000 DEG C to 1500 DEG C in reduction atmosphere and then cooled. The phosphor can emit green light with the center wave length of 508mm under the excitation of ultraviolet light and near-ultraviolet light of 380nm and can serve as near-ultraviolet light excited phosphor for white-light LEDs. The green emitting phosphor for the white-light LEDs has the advantages of high light emitting quality, wide excitation wavelength, simplicity in preparation method and no pollution and the like.
Description
Technical field
the present invention relates to a kind of green fluorescence luminescent material, particularly a kind of under near ultraviolet excitation the fluorescent material of transmitting green fluorescence, it can be applicable to belong to the fluorescent material technical field in ultraviolet-near ultraviolet type white light LEDs.
Background technology
under the situation that global energy crisis, environmental requirement improve constantly, adopt long, energy-conservation, safety of life-span, environmental protection, rich color, microminiaturized semiconductor LED throw light on by universally acknowledged be a kind of main path of energy-conserving and environment-protective.White light LEDs is as a kind of novel solid-state illumination technology, and it is described as the lighting source of new generation of mercury vapour excited fluorescent lamp that 21 century must replace incandescent light and the easy contaminate environment of high energy consumption, more and more receives people's attention in energy-conservation green illumination field.
are since first white light LEDs in 1996 comes out; Development rapidly; Luminous efficiency improves constantly, and is expected to replace traditional lighting sources such as incandescent light, luminescent lamp and high voltage mercury lamp, is called the green illumination light source of tool development prospect of 21st century.At present, the technology of preparing of white light LEDs mainly contains three kinds: the one, and the combination of red, green, blue three-color LED, this method can arbitrarily be adjusted color, but power supply is complicated, and cost is higher; It two is blue-ray LED and YAG (Y
3
Al
5
O
12
): Ce
3+
The yellow fluorescent powder combination, this method relative cost is lower, and efficient is higher; But owing to lack red composition, colour rendering index is relatively poor, simultaneously; Because the absorption peak of the light-converting material of blue-light LED chip requires to be positioned at wavelength 420～470nm, the fluorescent material that can satisfy this requirement is considerably less, and absorption intensity neither be very big; Seek this type fluorescent material suitable difficulty is arranged; So the wavelength of led chip is along with the development of ME, more and more move toward the shortwave direction, make " near ultraviolet (360～410nm) type white light LEDs (NUV-LED) " become the most active system of present research; The 3rd is the combination of ultraviolet or near ultraviolet LED and three primary colors fluorescent powder; This method color developing is best; But at present the fluorescent material luminous efficiency is lower, and therefore, development of new efficiently, redness, green and the blue colour fluorescent powder of Heat stability is good be the key that improves the white light LEDs luminous mass.
At present, one type of maximum NUV-LED of research is orthosilicate system M with green emitting phosphor
2
SiO
4
: Eu
2+
(M=Ca, Sr Ba), wherein, mainly are to fluorescent material Ba
2
SiO
4
: Eu
2+
Carried out a series of research work; The result shows: this fluorescent material emission peak under near ultraviolet excitation is positioned at 505 nm wideband spectrum; And its excitation spectrum is very wide; Fine with near-ultraviolet light chip coupling just in time, the chromaticity coordinates of the green light LED that obtains with the NUV-LED chips incorporate is x=0.1904, y=0.4751; Experiment confirm Sr
2+
Replace the Ba in the matrix
2+
The time, along with the change of Ba/Sr ratio, its emission peak red shift is to 569nm, and ability is more effective by near ultraviolet excitation; At BaSrSiO
4
: Eu
2+
System is with NH
4
Cl is as solubility promoter or through mixing Y altogether
3+
, Ce
3+
, Ho
3+
Plasma, its luminous intensity also increases significantly, and in addition, through changing synthesis condition such as temperature etc., also can improve fluorescent material M
2
SiO
4
: Eu
2+
Luminous intensity.
<b >Silicophosphate, Sr</b><sub ><b >5</b></sub><b >(PO</b><sub ><b >4</b></sub><b >)</b><sub ><b >2</b></sub><b >(SiO</b><sub ><b >4</b></sub><b >): Eu</b><sup ><b >2+</b></sup><b >Can be excited effectively by near-ultraviolet light 345nm, launch the green glow that peak value is 500nm, but along with the rising of temperature, emmission spectrum there is slight blue shift phenomenon.Chinese invention patent " a kind of earth alkali metal silicophosphate fluorescent material and method of manufacture and application " (CN101597493A) in, a kind of earth alkali metal silicophosphate fluorescent material is provided, chemical constitution is M</b><sub ><b >3-x-y</b></sub><b >(PO</b><sub ><b >4</b></sub><b >)</b><sub ><b >2</b></sub><b >SiO</b><sub ><b >4</b></sub><b >: Eu</b><sub ><b >x</b></sub><b >R</b><sub ><b >y</b></sub><b >, 0.001≤x≤0.1,0.001≤y≤0.2 wherein; Through in raw material, adding solubility promoter or after co-precipitation is handled, adding solubility promoter again, emission wavelength has been synthesized in the following reaction of high temperature can be according to the fluorescent material of adjusting, excitation wave length and width, good chemical stability; Chinese invention patent " a kind of earth alkali metal silicophosphate white light emitting phosphor and method of manufacture thereof " (CN101284990A) in, it consists of Ba the fluorescent material that is provided</b><sub ><b >a</b></sub><b >Sr</b><sub ><b >b</b></sub><b >Ca</b><sub ><b >c</b></sub><b >(PO</b><sub ><b >4</b></sub><b >)</b><sub ><b >x</b></sub><b >(SiO</b><sub ><b >4</b></sub><b >)</b><sub ><b >y</b></sub><b >: Eu</b><sub ><b >d</b></sub><b >, Mn</b><sub ><b >e</b></sub><b >, 3.9≤a< wherein; 9,0≤b≤3,0.1<C≤1,0.01<D≤0.1,0.01<E≤0.1,1<X≤4,0.1≤y≤2; Change along with forming, the excitation wavelength range of this fluorescent material is ultraviolet and purple light, excites emission white light down at 365nm; Chinese invention patent CN101029231A discloses a kind of bivalent-europium-excited base-metal silicate phosphate fluorescent powder and preparation method thereof, and chemical constitution is M</b><sub ><b >7-a-b</b></sub><b >M '</b><sub ><b >a</b></sub><b >(PO</b><sub ><b >4</b></sub><b >)</b><sub ><b >x</b></sub><b >(SiO</b><sub ><b >4</b></sub><b >)</b><sub ><b >y</b></sub><b >: Eu</b><sub ><b >b</b></sub><b >Wherein, M, M ' are respectively a kind of among earth alkali metal Ca, Sr or the Ba, 0≤a<7,0<B≤0.15,0<X≤2, y=3.5-1.5x; Chinese invention patent CN101531901A " a kind of ultraviolet purple light excited red and blue transmitted phosphosilicate fluorescent powder ", chemical constitution is Sr</b><sub ><b >6-x-a</b></sub><b >M</b><sub ><b >x</b></sub><b >Mg</b><sub ><b >1-b</b></sub><b >(PO</b><sub ><b >4</b></sub><b >)</b><sub ><b >y</b></sub><b >(SiO</b><sub ><b >4</b></sub><b >)</b><sub ><b >3.5-0.75y</b></sub><b >: Eu</b><sub ><b >a</b></sub><b >Mn</b><sub ><b >b</b></sub><b >, wherein M be among earth alkali metal Ca or the Ba any, 0<A≤0.1,0<B≤0.2,0≤x≤3.96,0.5≤y≤3.</b>
Bibliographical information in the fluorescent material technical field, is seen by the divalent europium activated phosphorus Calucium Silicate powder green fluorescence powder of near ultraviolet excitation in sum at present in
.
Summary of the invention
the objective of the invention is to overcome the deficiency that prior art exists, and provide a kind of percent crystallinity high, and luminous mass is good, and is with low cost, and simple, the free of contamination white light LEDs of preparation technology is with green fluorescence luminescent material and preparation method thereof.
For reaching above purpose, the technical scheme that the present invention adopts provides a kind of green phosphor for white light LED, and it is a kind of divalent europium Eu
2+
Adulterated earth alkali metal silicophosphate, chemical formula are Ca
7-7x
Eu
7x
Si
2
P
2
O
16
In the formula, x is divalent europium Eu
2+
The doping volumetric molar concentration, 0.0001≤x≤1.0.
A kind of preparation method of green phosphor for white light LED comprises the steps:
1, to contain calcium ion Ca
2+
Compound, contain anion silicon Si
4+
, phosphonium ion P
5+
Compound with contain europium ion Eu
3+
Rare earth compound be raw material, press chemical formula Ca
7-7x
Eu
7x
Si
2
P
2
O
16
, the molar ratio of each element takes by weighing raw material in 0.0001≤x≤1.0, after grinding and mixing, and calcining under air atmosphere, calcining temperature is 200～900 ℃, calcination time is 2～8 hours;
Behind
2, the naturally cooling; Thorough mixing grinds evenly again, in reducing atmosphere, carries out sintering once more, and sintering temperature is 1000～1500 ℃; Sintering time is 1～15 hour, obtains the phosphorus Calucium Silicate powder green luminescent material of the rare earth doped europium ion of powder shaped.
The described calcium ion Ca that contains
2+
Compound be a kind of in quicklime, calcium hydroxide, nitrocalcite, lime carbonate, the calcium sulfate, or their arbitrary combination.
The described anion silicon Si that contains
4+
Compound be a kind of in silicon-dioxide, the tetraethyl silicate, or their combination.
The described negatively charged ion phosphorus P that contains
5+
Compound be a kind of in Vanadium Pentoxide in FLAKES, primary ammonium phosphate, ammonium hydrogen phosphate, the ammonium phosphate, or their arbitrary combination.
described rare earth compound that contains europium ion is a kind of in europium sesquioxide, oxalic acid europium, the europium nitrate, or their arbitrary combination.
A kind of in three kinds of atmosphere below the described reducing atmosphere or their combination:
(1) hydrogen atmosphere, or the volume ratio of hydrogen and nitrogen is the mixed-gas atmosphere of 1:0.2～0.85;
(2) CO gas atmosphere;
The gas atmosphere that
(3) carbon granules or various gac burn and produced in air.
Compared with prior art, the advantage of technical scheme of the present invention is:
The substrate material that
1, technical scheme of the present invention provide is easy to realize bivalent rare earth ionic reduction, and the bivalent rare earth ion can stable existence in this matrix, is difficult for deliquescence, and need not to coat and handle.
2, fluorescent material Ca of the present invention
7-7x
Eu
7x
Si
2
P
2
O
16
Has excitation area than broad; Excite main peak at 380nm, this is quite identical with the NUV-LED excitation area of using at present (360-410nm), excites at near-ultraviolet light 380-390nm and launches the green glow that main peak is 508nm down; Therefore, be applicable near ultraviolet type white light LEDs (NUV-LED) chip.
3, with commercial green emitting phosphor ZnS:Cu
+
, Al
3+
Compare, the preparation process of substrate material of the present invention is simple, the product easily collecting, and no waste water and gas discharging, environmental friendliness especially is fit to serialization production.
The fluor that
4, the present invention obtain is in ultraviolet or the near ultraviolet excitated very strong green light of emission down, and it can be satisfied with the application of near ultraviolet white light LEDs preferably.Simultaneously, the invention provides the preparation method of this fluorescent material, its step is simple, easy handling.
Description of drawings
Fig. 1 is by the X-ray powder diffraction collection of illustrative plates of the material sample of the present invention's technology preparation and the comparison of standard card PDF#11-0676;
Fig. 2 is to the ultraviolet that obtains by technological material sample monitoring emission light 508 nm that prepare of the present invention and the exciting light spectrogram of near ultraviolet region;
Fig. 3 is the material sample doping different concns divalent europium Eu under near-ultraviolet ray 380 nm excite by the preparation of the present invention's technology
2+
Luminescent spectrum.
Embodiment
further describe the present invention below in conjunction with accompanying drawing and embodiment.
Present embodiment provides Ca
6.93
Eu
0.07
Si
2
P
2
O
16
And preparation method thereof.
Take by weighing nitrocalcite Ca (NO
3
)
2
4H
2
The O:5.455 gram, europium sesquioxide Eu
2
O
3
: 0.041 gram, primary ammonium phosphate NH
4
H
2
(PO
4
): 0.767 gram, silicon-dioxide SiO
2
: 0.40 gram, after in agate mortar, grinding and mixing, select air atmosphere to calcine for the first time, optimum calcinating temperature is 550～700 ℃, calcination time 5～7 hours is cooled to room temperature then, takes out sample.The thorough mixing grinding is even once more for the incinerating raw material for the first time; Among reducing atmospheres such as nitrogen (interpolation gac), CO gas, hydrogen or nitrogen and hydrogen mixture, carry out sintering once more; 1100～1250 ℃ of optimal sintering temperatures; Calcination time 8～10 hours is chilled to room temperature then, takes out sample.Promptly obtain the rare earth doped europium ion Eu of powder shaped
2+
Phosphorus Calucium Silicate powder green luminescent material.
Referring to accompanying drawing 1, it is that the XRD test result shows that prepared material is phosphorus Calucium Silicate powder (Ca by the X-ray powder diffraction collection of illustrative plates of the material sample of present embodiment technical scheme preparation and the comparison of standard card PDF#11-0676
7
Si
2
P
2
O
16
) monophase materials.
are referring to accompanying drawing 2; Can find out the exciting light spectrogram of near ultraviolet region from what material sample monitoring emission light 508 nm by the preparation of the present invention's technology were obtained; Green luminous main near ultraviolet (NUV) zone between 355～400 nm, source that excites of this material can be mated the near ultraviolet LED chip well.
The emmission spectrum of material sample of present embodiment technical scheme preparation is pressed referring to curve a in the accompanying drawing 3 in
.
Embodiment 2
Present embodiment provides Ca
6.79
Eu
0.21
Si
2
P
2
O
16
And preparation method thereof.
Take by weighing nitrocalcite Ca (NO
3
)
2
4H
2
The O:5.344 gram, europium sesquioxide Eu
2
O
3
: 0.123 gram, primary ammonium phosphate NH
4
H
2
(PO
4
): 0.767 gram, silicon-dioxide SiO
2
: 0.40 gram, after in agate mortar, grinding and mixing, select air atmosphere to calcine for the first time, optimum calcinating temperature is 600～750 ℃, calcination time 5～6 hours is cooled to room temperature then, takes out sample.The thorough mixing grinding is even once more for the incinerating raw material for the first time; Among reducing atmospheres such as nitrogen (interpolation gac), CO gas, hydrogen or nitrogen and hydrogen mixture, carry out sintering once more; 1200～1300 ℃ of optimal sintering temperatures; Calcination time 9～10 hours is chilled to room temperature then, takes out sample.Promptly obtain the rare earth doped europium ion Eu of powder shaped
2+
Phosphorus Calucium Silicate powder green luminescent material.Its main structure properties, excitation spectrum and luminescent spectrum are similar with embodiment 1; The emmission spectrum of material sample of pressing present embodiment technical scheme preparation is referring to curve b in the accompanying drawing 3.
Embodiment 3
Present embodiment provides Ca
6.65
Eu
0.35
Si
2
P
2
O
16
And preparation method thereof.
Take by weighing nitrocalcite Ca (NO
3
)
2
4H
2
The O:5.234 gram, primary ammonium phosphate NH
4
H
2
(PO
4
): 0.767 gram is dissolved in deionized water; Europium sesquioxide Eu
2
O
3
: 0.2053 gram, be dissolved in rare nitric acid, add Hydrocerol A and carry out complexing; Tetraethoxy Si (OC
2
H
5
)
4
: 1.39 grams are dissolved in ethanol; They are mixed, stir, dry, and sintering under air atmosphere, optimal sintering temperature are 700～800 ℃, and sintering time is 6～7 hours; Behind the naturally cooling; After sample ground in agate mortar and mix; In reducing atmospheres such as nitrogen (interpolation gac), CO gas, hydrogen or nitrogen and hydrogen mixture, carry out double sintering, optimal sintering temperature is 1100～1250 ℃, and sintering time is 9～11 hours; Promptly obtain the phosphorus Calucium Silicate powder green luminescent material of powder shaped doping with rare-earth ions europium.Its main structure properties, excitation spectrum and luminescent spectrum are similar with embodiment 1; The emmission spectrum of material sample of pressing present embodiment technical scheme preparation is referring to curve c in the accompanying drawing 3.
Embodiment 4
Present embodiment provides Ca
6.51
Eu
0.49
Si
2
P
2
O
16
And preparation method thereof.
Take by weighing nitrocalcite Ca (NO
3
)
2
4H
2
The O:5.124 gram, primary ammonium phosphate NH
4
H
2
(PO
4
): 0.767 gram is dissolved in deionized water; Europium sesquioxide Eu
2
O
3
: 0.287 gram, be dissolved in rare nitric acid, add Hydrocerol A and carry out complexing; Tetraethoxy Si (OC
2
H
5
)
4
: 1.39 grams are dissolved in ethanol; They are mixed, stir, dry, and sintering under air atmosphere, optimal sintering temperature are 700～850 ℃, and sintering time is 7～8 hours; Behind the naturally cooling; After sample ground in agate mortar and mix; In reducing atmospheres such as nitrogen (interpolation gac), CO gas, hydrogen or nitrogen and hydrogen mixture, carry out double sintering, sintering temperature is 1200～1300 ℃, and sintering time is 10～12 hours; Promptly obtain the phosphorus Calucium Silicate powder green luminescent material of powder shaped doping with rare-earth ions europium.Its main structure properties, excitation spectrum and luminescent spectrum are similar with embodiment 1; The emmission spectrum of material sample of pressing present embodiment technical scheme preparation is referring to curve d in the accompanying drawing 3.
Referring to accompanying drawing 3, it is the different concns divalent europium Eu of the embodiment of the invention 1,2,3 and 4 preparations
2+
At Ca
7-7x
Eu
7x
Si
2
P
2
O
16
Excite the luminescent spectrum figure that obtains with near-ultraviolet light 380nm in the fluorescent material.Can see by Fig. 3, the different specimen materials that various embodiments of the present invention provide, their main center emission wavelengths are applicable to that for the green emitting wave band of about 508nm near-ultraviolet light is the white light LEDs of excitation light source.Among Fig. 3, curve a, b, c and d are respectively by the spectral radiation curves of the material sample of embodiment 1,2,3 and the preparation of 4 technical schemes, can be found out by Fig. 3, along with divalent europium Eu
2+
The increase of concentration, the luminous intensity of fluorescent material strengthens gradually, and when x=0.05, it is the strongest that luminous intensity reaches, and continues to increase divalent europium Eu
2+
Concentration, luminous intensity weakens, this is the result of concentration quenching.
Claims (7)
1. green phosphor for white light LED, it is characterized in that: it is a kind of divalent europium Eu
2+Adulterated earth alkali metal silicophosphate, chemical formula are Ca
7-7xEu
7xSi
2P
2O
16In the formula, x is divalent europium Eu
2+The doping volumetric molar concentration, 0.0001≤x≤1.0.
2. the preparation method of a green phosphor for white light LED as claimed in claim 1 is characterized in that comprising the steps:
(1) to contain calcium ion Ca
2+Compound, contain anion silicon Si
4+, phosphonium ion P
5+Compound with contain europium ion Eu
3+Rare earth compound be raw material, press chemical formula Ca
7-7xEu
7xSi
2P
2O
16, the molar ratio of each element takes by weighing raw material in 0.0001≤x≤1.0, after grinding and mixing, and calcining under air atmosphere, calcining temperature is 200～900 ℃, calcination time is 2～8 hours;
(2) behind the naturally cooling, thorough mixing grinds evenly again, in reducing atmosphere, carries out sintering once more, and sintering temperature is 1000～1500 ℃, and sintering time is 1～15 hour, obtains the phosphorus Calucium Silicate powder green luminescent material of the rare earth doped europium ion of powder shaped.
3. the preparation method of a kind of green phosphor for white light LED according to claim 2 is characterized in that: the described calcium ion Ca that contains
2+Compound be a kind of in quicklime, calcium hydroxide, nitrocalcite, lime carbonate, the calcium sulfate, or their arbitrary combination.
4. the preparation method of a kind of green phosphor for white light LED according to claim 2 is characterized in that: the described anion silicon Si that contains
4+Compound be a kind of in silicon-dioxide, the tetraethyl silicate, or their combination.
5. the preparation method of a kind of green phosphor for white light LED according to claim 2 is characterized in that: the described negatively charged ion phosphorus P that contains
5+Compound be a kind of in Vanadium Pentoxide in FLAKES, primary ammonium phosphate, ammonium hydrogen phosphate, the ammonium phosphate, or their arbitrary combination.
6. the preparation method of a kind of green phosphor for white light LED according to claim 2, it is characterized in that: the described rare earth compound that contains europium ion is a kind of in europium sesquioxide, oxalic acid europium, the europium nitrate, or their arbitrary combination.
7. the preparation method of a kind of green phosphor for white light LED according to claim 2 is characterized in that: a kind of in three kinds of atmosphere below the described reducing atmosphere or their combination:
(1) hydrogen atmosphere, or the volume ratio of hydrogen and nitrogen is the mixed-gas atmosphere of 1:0.2～0.85;
(2) CO gas atmosphere;
(3) carbon granules or the various gac gas atmosphere that in air, burns and produced.
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|---|---|---|---|
| CN2011104117913A CN102492422A (en) | 2011-12-12 | 2011-12-12 | Green emitting phosphor for white-light LEDs and preparation method thereof |
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|---|---|---|---|
| CN2011104117913A CN102492422A (en) | 2011-12-12 | 2011-12-12 | Green emitting phosphor for white-light LEDs and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059849A (en) * | 2013-01-23 | 2013-04-24 | 苏州大学 | Silicophosphate green fluorescent powder activated by Eu<2+> and preparation method as well as application thereof |
| CN107142106A (en) * | 2017-05-16 | 2017-09-08 | 中国计量大学 | A kind of blue fluorescent powder for white-light LED and preparation method thereof |
| CN108048085A (en) * | 2017-12-12 | 2018-05-18 | 杭州电子科技大学 | A kind of phosphosilicate green emitting phosphor and preparation method thereof |
| CN108130080A (en) * | 2018-02-07 | 2018-06-08 | 淮阴师范学院 | Ce3+The Ca of activation7(PO4)2(SiO4)2Fluorescent powder and preparation method thereof |
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|---|---|---|---|---|
| US20060145123A1 (en) * | 2004-08-04 | 2006-07-06 | Intematix Corporation | Silicate-based green phosphors |
| CN101029231A (en) * | 2007-01-11 | 2007-09-05 | 复旦大学 | Bivalent-europium-excited base-metal silicate phosphate fluorescent powder and its production |
| CN101284990A (en) * | 2008-06-05 | 2008-10-15 | 复旦大学 | White luminous emission fluorescent powder of alkali metal phosphosilicate and preparation method thereof |
| CN101531901A (en) * | 2009-04-16 | 2009-09-16 | 复旦大学 | Ultraviolet purple light excited red and blue transmitted phosphosilicate fluorescent powder |
-
2011
- 2011-12-12 CN CN2011104117913A patent/CN102492422A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060145123A1 (en) * | 2004-08-04 | 2006-07-06 | Intematix Corporation | Silicate-based green phosphors |
| CN101029231A (en) * | 2007-01-11 | 2007-09-05 | 复旦大学 | Bivalent-europium-excited base-metal silicate phosphate fluorescent powder and its production |
| CN101284990A (en) * | 2008-06-05 | 2008-10-15 | 复旦大学 | White luminous emission fluorescent powder of alkali metal phosphosilicate and preparation method thereof |
| CN101531901A (en) * | 2009-04-16 | 2009-09-16 | 复旦大学 | Ultraviolet purple light excited red and blue transmitted phosphosilicate fluorescent powder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103059849A (en) * | 2013-01-23 | 2013-04-24 | 苏州大学 | Silicophosphate green fluorescent powder activated by Eu<2+> and preparation method as well as application thereof |
| CN107142106A (en) * | 2017-05-16 | 2017-09-08 | 中国计量大学 | A kind of blue fluorescent powder for white-light LED and preparation method thereof |
| CN108048085A (en) * | 2017-12-12 | 2018-05-18 | 杭州电子科技大学 | A kind of phosphosilicate green emitting phosphor and preparation method thereof |
| CN108048085B (en) * | 2017-12-12 | 2021-02-02 | 杭州电子科技大学 | Phosphosilicate green fluorescent powder and preparation method thereof |
| CN108130080A (en) * | 2018-02-07 | 2018-06-08 | 淮阴师范学院 | Ce3+The Ca of activation7(PO4)2(SiO4)2Fluorescent powder and preparation method thereof |
| CN108130080B (en) * | 2018-02-07 | 2020-11-13 | 淮阴师范学院 | Ce3+Activated Ca7(PO4)2(SiO4)2Fluorescent powder and preparation method thereof |
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Application publication date: 20120613 |