CN102277165A - Fluorescent powder based on ultraviolet light or blue light excitation, preparation method thereof and application thereof - Google Patents
Fluorescent powder based on ultraviolet light or blue light excitation, preparation method thereof and application thereof Download PDFInfo
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- CN102277165A CN102277165A CN2011101578848A CN201110157884A CN102277165A CN 102277165 A CN102277165 A CN 102277165A CN 2011101578848 A CN2011101578848 A CN 2011101578848A CN 201110157884 A CN201110157884 A CN 201110157884A CN 102277165 A CN102277165 A CN 102277165A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 title abstract description 13
- 230000005284 excitation Effects 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 83
- 239000000126 substance Substances 0.000 claims abstract description 17
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910052706 scandium Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052725 zinc Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 229910052765 Lutetium Inorganic materials 0.000 abstract description 2
- 230000009103 reabsorption Effects 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 description 10
- 238000000227 grinding Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 7
- 239000010431 corundum Substances 0.000 description 7
- 238000009877 rendering Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000000695 excitation spectrum Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 240000003936 Plumbago auriculata Species 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 1
- 230000003407 synthetizing effect Effects 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
一种基于紫外光或蓝光激发的荧光粉及其制备方法和应用，涉及发光技术领域中的荧光材料。解决现有技术中荧光粉混合的方法制作白光LED，而使不同荧光粉之间再吸收，发光效率低的问题。材料化学式为：(M3-xMnx)(R2-yCey)(Si，Ge)3O12，其中M代表Mg、Ca、Sr、Ba或Zn中的至少一种；R代表Sc、Y、La、Gd或Lu中的至少一种；x、y为摩尔分数，所述x的取值范围为0.01≤x≤1，y的取值范围为0.0001≤y≤0.5。将上述材料研磨混合均匀后置入坩埚，在还原气氛条件下放入高温炉中，获得荧光粉。本发明提供荧光粉可作为单一荧光粉制作白光LED，该荧光粉发光强度高、化学稳定性好。
A fluorescent powder excited by ultraviolet light or blue light and its preparation method and application relate to fluorescent materials in the field of luminescent technology. The invention solves the problem of reabsorption between different phosphor powders and low luminous efficiency in producing white light LEDs in the prior art by mixing phosphor powders. The chemical formula of the material is: (M 3-x Mn x )(R 2-y Ce y )(Si, Ge) 3 O 12 , where M represents at least one of Mg, Ca, Sr, Ba or Zn; R represents Sc , Y, La, Gd or Lu; x and y are mole fractions, the value range of x is 0.01≤x≤1, and the value range of y is 0.0001≤y≤0.5. The above-mentioned materials are ground and mixed uniformly, put into a crucible, and put into a high-temperature furnace under reducing atmosphere conditions to obtain phosphor. The invention provides a fluorescent powder which can be used as a single fluorescent powder to make a white light LED. The fluorescent powder has high luminous intensity and good chemical stability.
Description
Technical field
The present invention relates to a kind of fluorescent material in the luminescence technology field, relate in particular to a kind of based on UV-light or blue-light excited fluorescent material and its production and application.
Background technology
Plurality of advantages such as that white light LEDs (Light Emitting Diode) has is nontoxic, energy-efficient, the life-span is long, all solid state, operating voltage is low, shock resistance and security are good can be widely used in illumination and demonstration field.It replaces traditional incandescent light and luminescent lamp and has profound significance as lighting source of new generation.
Realize that the general and simple method of white light LEDs is that apply can be by the blue-light excited and fluorescent material emission gold-tinted on blue-light LED chip.At present, the yellow fluorescent powder that is widely used on the commercialization white light LEDs mainly is the YAG yttrium aluminum garnet, and its chemical formula is Y
3Al
5O
12: Ce
3+, (referring to United States Patent (USP) 5,998,925 and European patent 862,794).Yet, owing to lack the ruddiness composition in its emmission spectrum, thus cause the colour rendering index of synthetic white light LEDs on the low side, colour temperature is higher.In order to obtain high-color rendering, hang down the warm white LED of colour temperature, people propose to make white light LEDs by green and red fluorescence powder blended method.This fluorescent material blended method exists between the different fluorescent material and absorbs, thereby causes whole lighting efficiency lower.The emmission spectrum of the white light LEDs of Zhi Zuoing changes along with the variation of drive current simultaneously.Therefore, the single white emitting fluorescent powder of panchromatic emission becomes a kind of new research tendency.
2007, people such as Japanology personnel Shimomura reported a kind of Ce
3+Activated has the green scandium silicate fluorescent powder Ca of garnet structure
3Sc
2Si
3O
12: Ce
3+(CSS:Ce
3+), this fluorescent material can be launched the green glow of peak value at 505nm down the blue-light excited of 450nm, because this green emitting phosphor shows and compares YAG:Ce
3+Higher luminous efficiency causes people's extensive concern with better thermostability.Yet this green emitting phosphor must mix could synthesize white light with red fluorescence powder.This mixes the problem of bringing with regard to existing above-mentioned fluorescent material.
Summary of the invention
The objective of the invention is in order to solve fluorescent material blended method making white light LEDs in the prior art, absorb again between the different fluorescent material and make, the problem that luminous efficiency is low, what provide is a kind of based on UV-light or blue-light excited fluorescent material and its production and application.
To achieve these goals, the technical scheme taked of the present invention is as follows:
A kind ofly it is characterized in that having following chemical formula: (M based on UV-light or blue-light excited fluorescent material
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein M represents at least a among Mg, Ca, Sr, Ba or the Zn; R represents at least a among Sc, Y, La, Gd or the Lu; X, y are molar fraction, and the span of described x is 0.01≤x≤1, and the span of y is 0.0001≤y≤0.5.
The span of described x is 0.05≤x≤0.5, and the span of y is 0.01≤y≤0.2.
A kind of preparation method based on UV-light or blue-light excited fluorescent material, this method is realized by following steps:
(1) be (M with chemical formula
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12The oxide compound of middle element, fluorochemical, muriate or corresponding salt are raw material, take by weighing in molar ratio, and fully ground and mixed is even, obtains blend sample; Described M represents at least a among Mg, Ca, Sr, Ba or the Zn; R represents at least a among Sc, Y, La, Gd or the Lu; X, y are molar fraction, and the span of described x is 0.01≤x≤1, and the span of y is 0.0001≤y≤0.5;
(2) blend sample that step (1) is obtained is inserted in the crucible, under the reducing atmosphere condition, puts into the high temperature kiln roasting, obtains sintered compact; The maturing temperature of described blend sample is 1200-1400 ℃, and roasting time is 4 hours;
(3) promptly obtain described fluorescent material after the sintered compact that step (2) is obtained grinds.
Described reducing atmosphere is carbon monoxide or hydrogen.
Described High Temperature Furnaces Heating Apparatus is retort furnace or tube furnace.
Above-mentioned a kind of based on UV-light or the blue-light excited application of fluorescent material in the preparation white light LEDs, be to be that 0.4: 1 mixed is even according to mass ratio with described fluorescent material and Resins, epoxy, be coated on the blue light InGaN chip package curing and make white light LEDs.
Beneficial effect of the present invention: provided by the inventionly a kind ofly can be used as single-component phosphor based on UV-light or blue-light excited fluorescent material and be used to make white light LEDs, and this light-emitting phosphor intensity height, excitation wave length and width, emission wavelength ranges is wide, chemical stability good, can effectively be excited by UV-light or blue light, its emmission spectrum can be regulated by M and the component of R or the ratio of dopant ion Mn and Ce in the change substrate material;
The method of synthetizing phosphor powder of the present invention is simple, pollution-free, easy handling.
Description of drawings
Fig. 1 is the excitation spectrum (λ of fluorescent material in the embodiment of the invention 2
Em=575nm) synoptic diagram;
Fig. 2 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention 2
Ex=450nm) synoptic diagram;
Fig. 3 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention 7
Ex=450nm) synoptic diagram;
Fig. 4 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention 9
Ex=450nm) synoptic diagram;
Fig. 5 be in the embodiment of the invention 7 fluorescent material and blue chip in conjunction with the white light LEDs spectrogram of making;
Fig. 6 be in the embodiment of the invention 9 fluorescent material and blue chip in conjunction with the white light LEDs spectrogram of making.
Embodiment
With specific embodiment the present invention is done in further detail in conjunction with the accompanying drawings and describes:
Embodiment 1
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Sr in the described chemical formula, R=Sc, x=0.1, y=0.0001, the preparation molecular formula is (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.9999Ce
0.0001) (Si
2.7Ge
0.3) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.4molSrCO
3, 0.1molMnCO
3, 0.99995molSc
2O
3, 0.0001molCeO
2, 2.7molSiO
2, 0.3molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1400 ℃ of roastings 4 hours, promptly get (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.9999Ce
0.0001) (Si
2.7Ge
0.3) O
12Fluorescent material.
Embodiment 2
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Sr in the described chemical formula, R=Sc, x=0.1, y=0.1, the preparation molecular formula is (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.9Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.4molSrCO
3, 0.1molMnCO
3, 0.95molSc
2O
3, 0.1molCeO
2, 2.7molSiO
2, 0.3molGeO
2, after mixed grinding is even, place plumbago crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1400 ℃ of roastings 4 hours, promptly get (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.9Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.Fig. 1 is the excitation spectrum (λ of fluorescent material in the embodiment of the invention
Em=575nm) synoptic diagram; Fig. 2 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention
Ex=450nm) synoptic diagram.
Embodiment 3
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Sr in the described chemical formula, R=Sc, x=0.1, y=0.5, the preparation molecular formula is (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.5Ce
0.5) (Si
2.7Ge
0.3) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.4molSrCO
3, 0.1molMnCO
3, 0.75molSc
2O
3, 0.5molCeO
2, 2.7molSiO
2, 0.3molGeO
2, after mixed grinding is even, place platinum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1400 ℃ of roastings 4 hours, promptly get (Ca
2.5Sr
0.4Mn
0.1) (Sc
1.5Ce
0.5) (Si
2.7Ge
0.3) O
12Fluorescent material.
Embodiment 4
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca in the described chemical formula, R=Sc and Y, x=0.01, y=0.1, the preparation molecular formula is (Ca
2.99Mn
0.01) (Sc
1.5Y
0.4Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.
Take by weighing 2.99molCaCO in molar ratio
3, 0.01molMnCO
3, 0.75molSc
2O
3, 0.2molY
2O
3, 0.1molCeO
2, 2.7molSiO
2, 0.3molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1400 ℃ of roastings 4 hours, promptly get (Ca
2.99Mn
0.01) (Sc
1.5Y
0.4Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.
Embodiment 5
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca in the described chemical formula, R=Sc and Y, x=1, y=0.1, the preparation molecular formula is (Ca
2Mn) (Sc
1.5Y
0.4Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.
Take by weighing 2molCaCO in molar ratio
3, 1molMnCO
3, 0.75molSc
2O
3, 0.2molY
2O
3, 0.1molCeO
2, 2.7molSiO
2, 0.3molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1200 ℃ of roastings 4 hours, promptly get (Ca
2Mn) (Sc
1.5Y
0.4Ce
0.1) (Si
2.7Ge
0.3) O
12Fluorescent material.
Embodiment 6
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca, Mg and Ba in the described chemical formula, R=Sc, x=0.2, y=0.1, the preparation molecular formula is (Ca
2.4Mg
0.2Ba
0.2Mn
0.2) (Sc
1.9Ce
0.1) (Si
2.5Ge
0.5) O
12Fluorescent material.
Take by weighing 2.4molCaCO in molar ratio
3, 0.2molMgO, 0.2molBaCO
3, 0.2molMnCO
3, 0.95molSc
2O
3, 0.1molCeO
2, 2.5molSiO
2, 0.5molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1350 ℃ of roastings 4 hours, promptly get (Ca
2.4Mg
0.2Ba
0.2Mn
0.2) (Sc
1.9Ce
0.1) Si
3O
12Fluorescent material.
Embodiment 7
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Zn in the described chemical formula, R=Sc and La, x=0.2, y=0.1, the preparation molecular formula is (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5La
0.4Ce
0.1) (Si
2.5Ge
0.5) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.3molZnO, 0.2molMnCO
3, 0.75molSc
2O
3, 0.2molLa
2O
3, 0.1molCeO
2, 2.5molSiO
2, 0.5molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1350 ℃ of roastings 4 hours, promptly get (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5La
0.4Ce
0.1) Si
3O
12Fluorescent material.Fig. 3 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention 7
Ex=450nm) synoptic diagram.
Embodiment 8
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Zn in the described chemical formula, R=Sc and Gd, x=0.2, y=0.1, the preparation molecular formula is (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5Gd
0.4Ce
0.1) (Si
2.5Ge
0.5) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.3molZnO, 0.2molMnCO
3, 0.75molSc
2O
3, 0.2molGd
2O
3, 0.1molCeO
2, 2.5molSiO
2, 0.5molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1350 ℃ of roastings 4 hours, promptly get (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5Gd
0.4Ce
0.1) Si
3O
12Fluorescent material.
Embodiment 9
A kind of based on UV-light or blue-light excited fluorescent material, the materials chemistry formula is: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein work as M=Ca and Zn in the described chemical formula, R=Sc, Y and Lu, x=0.2, y=0.1, the preparation molecular formula is (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5Y
0.2Lu
0.2Ce
0.1) (Si
2.5Ge
0.5) O
12Fluorescent material.
Take by weighing 2.5molCaCO in molar ratio
3, 0.3molZnO, 0.2molMnCO
3, 0.75molSc
2O
3, 0.1molY
2O
3, 0.1molLu
2O
3, 0.1molCeO
2, 2.5molSiO
2, 0.5molGeO
2, after mixed grinding is even, place the high-purity corundum crucible, under the hydrogen reducing atmosphere condition, put into the high-temperature tubular kiln roasting, 1350 ℃ of roastings 4 hours, promptly get (Ca
2.5Zn
0.3Mn
0.2) (Sc
1.5Y
0.2Lu
0.2Ce
0.1) Si
3O
12Fluorescent material.Fig. 4 is the emmission spectrum (λ of fluorescent material in the embodiment of the invention 9
Ex=450nm) synoptic diagram.
As can be seen from the above embodiments, a kind of can effectively being excited by UV-light or blue light based on UV-light or blue-light excited fluorescent material of the present invention's proposition, the emmission spectrum of fluorescent material can be regulated by M and the component of R or the ratio of dopant ion Mn and Ce in the change substrate material.Fig. 5 be in the embodiment of the invention 7 fluorescent material and blue chip in conjunction with the white light LEDs spectrogram of making, its colour rendering index Ra=75, colour temperature CCT=5400K, chromaticity coordinates (x, y)=(0.33,0.41); Fig. 6 be in the embodiment of the invention 9 fluorescent material and blue chip in conjunction with the white light LEDs spectrogram of making, its colour rendering index Ra=83, colour temperature CCT=4200K, chromaticity coordinates (x, y)=(0.35,0.42).
A kind of synthetic method based on UV-light or blue-light excited fluorescent material provided by the invention is traditional high-temperature solid phase reaction method.This method is simple.Yet the synthetic method of this fluorescent material is not limited thereto.Chemical processes such as hydrothermal method, sol-gel, combustion method, microwave method also can be synthesized this fluorescent material.
Claims (6)
1. one kind based on UV-light or blue-light excited fluorescent material, it is characterized in that having following chemical formula: (M
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12, wherein M represents at least a among Mg, Ca, Sr, Ba or the Zn; R represents at least a among Sc, Y, La, Gd or the Lu; X, y are molar fraction, and the span of described x is 0.01≤x≤1, and the span of y is 0.0001≤y≤0.5.
2. as claimed in claim 1ly a kind ofly it is characterized in that based on UV-light or blue-light excited fluorescent material the span of described x is 0.05≤x≤0.5, the span of y is 0.01≤y≤0.2.
3. based on the described a kind of preparation method of claim 1, it is characterized in that this method is realized by following steps based on UV-light or blue-light excited fluorescent material:
(1) be (M with chemical formula
3-xMn
x) (R
2-yCe
y) (Si, Ge)
3O
12The oxide compound of middle element, fluorochemical, muriate or corresponding salt are raw material, take by weighing in molar ratio, and fully ground and mixed is even, obtains blend sample; Described M represents at least a among Mg, Ca, Sr, Ba or the Zn; R represents at least a among Sc, Y, La, Gd or the Lu; X, y are molar fraction, and the span of described x is 0.01≤x≤1, and the span of y is 0.0001≤y≤0.5;
(2) blend sample that step (1) is obtained is inserted in the crucible, under the reducing atmosphere condition, puts into the high temperature kiln roasting, obtains sintered compact; The maturing temperature of described blend sample is 1200-1400 ℃, and roasting time is 4 hours;
(3) promptly obtain described fluorescent material after the sintered compact that step (2) is obtained grinds.
4. a kind of preparation method based on UV-light or blue-light excited fluorescent material according to claim 3 is characterized in that the described reducing atmosphere of step (2) is carbon monoxide or hydrogen.
5. a kind of preparation method based on UV-light or blue-light excited fluorescent material according to claim 3 is characterized in that the described High Temperature Furnaces Heating Apparatus of step (2) is retort furnace or tube furnace.
6. claim 1 is described a kind of based on UV-light or the blue-light excited application of fluorescent material in the preparation white light LEDs, it is characterized in that, is that 0.4: 1 mixed is even with described fluorescent material and Resins, epoxy according to mass ratio, be coated on the blue light InGaN chip package curing and make white light LEDs.
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| CN102994086A (en) * | 2012-12-12 | 2013-03-27 | 中国科学院长春光学精密机械与物理研究所 | Red phosphor suitable for ultraviolet light excitation, and preparation method thereof |
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| CN108559491B (en) * | 2018-05-16 | 2019-05-28 | 广东旭宇光电有限公司 | Full spectrum fluorescent powder, Quan Guangpu diode and full spectrum plant lamp |
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