CN104087299B - A kind of blue light activated aluminate-based red fluorescent material and preparation method and application - Google Patents
A kind of blue light activated aluminate-based red fluorescent material and preparation method and application Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 59
- 150000004645 aluminates Chemical class 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 4
- 125000001967 indiganyl group Chemical group [H][In]([H])[*] 0.000 claims abstract 2
- 241001062009 Indigofera Species 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000000470 constituent Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 24
- 229910052593 corundum Inorganic materials 0.000 description 24
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 description 24
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 24
- 229910000018 strontium carbonate Inorganic materials 0.000 description 24
- 229910001845 yogo sapphire Inorganic materials 0.000 description 24
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 18
- 239000000843 powder Substances 0.000 description 14
- 238000000295 emission spectrum Methods 0.000 description 10
- 238000001228 spectrum Methods 0.000 description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 description 9
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002284 excitation--emission spectrum Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- QYZBCWXZSYTIOY-UHFFFAOYSA-N Mercuric oxide Chemical compound [O-2].[Hg+2] QYZBCWXZSYTIOY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006862 quantum yield reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- -1 rare earth ion Chemical class 0.000 description 1
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Abstract
Open a kind of blue light activated aluminate-based red fluorescent material of the present invention and preparation method and application, described fluorescent material M1 1‑xM2 2AlO5: xEu, presses the metering of atomic molar number, 0.005≤x≤1.0, M in formula1For at least one in La or Gd of trivalent, M2For at least one in Sr or Ca, Eu is bivalence；This fluorescent material effectively can be excited by the light in 400 500nm wave-length coverages, and sends the HONGGUANG of 525 750nm wavelength；The preparation method of this fluorescent material is: weigh in proportion after corresponding raw material mixes in N according to molecular formula composition respectively2And H2In roasting under mixed atmosphere, i.e. obtain blue light activated aluminate-based red fluorescent material；This material can be applicable in blue light activated white light LEDs；The fluorescent material of the present invention has that chemical stability is good, launch the feature such as coverage width, preparation method is simple, low cost, without harmful constituent, be easily achieved commercial production.
Description
Technical field
The invention belongs to luminescent material technical field, especially relate to a kind of blue light activated aluminate-base red fluorescence material
Material and preparation method and application.
Background technology
White light LEDs has that volume is little, caloric value is low, power consumption is little, life-span length, response speed are fast, environment friendly and pollution-free, can put down
The advantages such as face encapsulation, are referred to as the forth generation light source after electric filament lamp, fluorescent lamp.
The implementation of white light LEDs mainly has three kinds of approach: (1) multi-colored led combined method, by sending out, red, green, blue is trichroism
LED combination produces white light, and this method can arbitrarily adjust color, but power supply is complicated, relatively costly；(2) UV LED chip is utilized to excite
Red, green, blue emitting phosphor synthesis white light, this method color rendering properties is optimal, but the most inefficient；(3) blue-light LED chip and can be blue
The YAG:Ce that light effectively excites3+Yellow fluorescent powder combination realizes white light, and this method is of relatively low cost, and efficiency is higher.Use at present
Blue light for InGaN chip coating YAG:Ce3+The white light LEDs that yellow fluorescent powder is formed, mature preparation process, product is stable,
Enter special lighting field.But, the maximum deficiency of this compound mode is that color rendering index is on the low side, it is difficult to meet room lighting
With require the occasion of high color rendering index (CRI), main cause is YAG:Ce3+In spectrum, red spectral band is launched more weak.Accordingly, it would be desirable to " blue
Light LED chip+yellow fluorescent powder " on the basis of, add the red fluorescence powder that can be excited by blue chip with in supplementary spectrum
Red color components.
The kind of the red fluorescence powder being stimulated by blue light currently studied and be applied is actually rare, mainly has
Alkaline earth sulfide system and Nitride systems, but sulfide Hydrargyri Oxydum Rubrum unstable chemcial property, easy deliquescence, and nitride is glimmering
The synthesis of light powder typically requires the harsh conditions such as high temperature, high pressure, and the requirement to the equipment of production is the highest, is unfavorable for industrialized production.
Therefore, this will ask for help while existing red fluorescence powder performance is improved, also to constantly look for new
Substrate, develop the red fluorescent powder for white radiation LED of new component.2009, Im et al. is reported first in patent documentation 1
Ce3+The LaSr of doping2AlO5Novel aluminate yellow fluorescent powder LaSr2AlO5:Ce3+Under 450nm blue light excites, can launch
Going out the broadband spectral that peak value is 556nm, this fluorescent material has the most chemically and thermally stability, and higher light conversion efficiency
With light color stability, but to temperature with drive the change of electric current insensitive, and LaSr2AlO5For tetrahedral structure, space group is
, in lattice, there is a La in I4/mcm3+The Sr different with two2+Crystal case, be a kind of be applicable to rare earth ion doped steady
Fixed matrix material, but by this materials application in white light LEDs field, have not yet to see report so far.
Summary of the invention
For above-mentioned technical Analysis and the problem of existence, it is provided that method is simple, the light activated aluminate of indigo plant of stable performance
Base red fluorescent material and preparation method thereof and application thereof, the present invention is achieved in that
A kind of blue light activated aluminate-based red fluorescent material, has following molecular formula M1 1-xM2 2AlO5: xEu, in formula
Measure by atomic molar number, 0.005≤x≤1.0；
M1For La or Gd at least one, M2For at least one in Sr or Ca；M1For trivalent, M2For bivalence, Eu is
Bivalence.
Preferably, in the present invention, the light activated aluminate-based red fluorescent material of described indigo plant has following molecular formula: La1- xSr2AlO5: xEu, presses the metering of atomic molar number, 0.005≤x≤1.0 in formula.
Preferably, in the present invention, there is following molecular formula: La1-x-yGdySr2AlO5: xEu, in formula based on atomic molar number
Amount, 0.005≤x≤1.0,0 ＜ y≤0.2.
Preferably, in the present invention, the light activated aluminate-based red fluorescent material of described indigo plant, there is following molecular formula:
La0.5-yGdySr2AlO5: 0.5Eu formula is pressed the metering of atomic molar number, 0 ＜ y≤0.2.
Preferably, in the present invention, the light activated aluminate-based red fluorescent material of described indigo plant, there is following molecular formula:
La1-xSr2-zCazAlO5: xEu, presses the metering of atomic molar number, 0.005≤x≤1.0,0 ＜ z≤1.5 in formula.
In the present invention, it is preferred that the light activated aluminate-based red fluorescent material of described indigo plant has a following molecular formula:
La0.5Sr2-zCazAlO5: 0.5Eu, 0 ＜ z≤1.5.
In the present invention, the preparation method of the light activated aluminate-based red fluorescent material of described indigo plant, specifically comprise the following steps that point
Do not form according to the molecular formula of blue light activated aluminate-based red fluorescent material and weigh each element oxide in proportion, mix 2-
At a temperature of 60 DEG C, it is dried 6-10h after 4h, proceeds to after being placed in crucible in high temperature process furnances, evacuation, at N2And H2Mixed atmosphere
Under in 1400 DEG C-1500 DEG C roasting 4h, i.e. obtain the light activated aluminate-based red fluorescent material of described indigo plant.
In the present invention, the application in blue light excited white light LED of the described indigo plant light activated aluminate-based red fluorescent material.
The red fluorescence powder that the present invention proposes is based on LaSr2AlO5The compound of a kind of square structure, A position is by A position
Being to be collectively formed by La3+ and Sr2+, B position is by Al3+Composition, rare earth doped Eu2+There is provided the active ion launching HONGGUANG, by adopting
Use Gd3+Replace the La of A position3+With employing Ca2+Replace the Sr of A position2+Realize the red emission of fluorescent material carry out luminescent properties optimization and
Spectrum regulates and controls, and in the present invention, the valence state of the Eu ion mixing lattice can be reduced to bivalence by trivalent entity, it is achieved HONGGUANG goes out
Penetrate, optimize luminescent properties.
The invention has the beneficial effects as follows:
(1) red fluorescence material that the present invention relates to is that wide range is launched, and by codope Gd3+, Ca2+Can be effective
Ground improves the luminous intensity of fluorescent material, and emission peak can be regulated at 610-620nm.
(2) red fluorescence material that the present invention relates to is oxide series, and physicochemical properties are highly stable.
(3) synthetic method of the red fluorescence material that the present invention relates to is simple, it is not necessary to special consersion unit, industrialization
Convenient for production.
Accompanying drawing explanation
Fig. 1 is the excitation-emission spectrum of the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 1.
Fig. 2 be the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 1 under 445 nanometers excite
Emission spectrum.
Fig. 3 is that the light activated aluminate-based red fluorescent material luminous intensity of the indigo plant prepared by embodiment 1 is closed with Eu content
The schematic diagram of system.
Fig. 4 is the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 1 with yellow fluorescent material in indigo plant
The spectrum that light LED chip records under irradiating.
Fig. 5 be the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 2 under 445 nanometers excite
Emission spectrum.
Fig. 6 be under light activated aluminate-based red fluorescent material 445 nanometer of the indigo plant prepared by embodiment 3 excites send out
Penetrate spectrum.
Detailed description of the invention
Embodiment 1: blue light activated aluminate-based red fluorescent material La1-xSr2AlO5: the preparation of xEu
With M1For La, M2As a example by Sr, preparation preparation M1 1-xM2 2AlO5: xEu, La chosen by raw material2O3, SrCO3, Al2O3With
Eu2O3,By molecular formula La1-xSr2AlO5: xEu(x=0.005,0.02,0.05,0.1,0.35,0.5,0.75,1.0；)
Weigh raw material respectively:
3.2418 grams of La during x=0.0052O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 0.0176 gram of Eu2O3;
3.1929 grams of La during x=0.022O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 0.0704 gram of Eu2O3;
3.0952 grams of La during x=0.052O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 0.1760 gram of Eu2O3;
2.9323 grams of La during x=0.12O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 0.3519 gram of Eu2O3;
2.1178 grams of La during x=0.352O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 1.2317 grams of Eu2O3;
1.6290 grams of La during x=0.52O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 1.7596 grams of Eu2O3;
0.9145 gram of La during x=0.752O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 2.6395 grams of Eu2O3;
0 gram of La during x=1.02O3, 5.9052 grams of SrCO3, 1.0196 grams of Al2O3, 3.5192 grams of Eu2O3;
Respectively by load weighted raw material with planetary ball mill mixing 4h after, at a temperature of 60 DEG C be dried 10h, be completely dried
After raw material is contained in crucible, proceed in high temperature process furnances, after evacuation, be passed through N2And H2Volume ratio is the mixed atmosphere of 1:1, with
1400 DEG C of roastings 4 hours, i.e. obtain the light activated aluminate-based red fluorescent material of described indigo plant.
Fig. 1 is the excitation-emission spectrum of the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 1, as
Shown in figure, being monitored at 610nm, sample has corresponding excitation peak, wherein 445nm at 445nm, 460nm and 480nm
The excitation spectrum at place is the strongest, and the corresponding emission spectrum using 445nm to carry out exciting obtained 610nm is the strongest.
Fig. 2 is the light activated aluminate-based red fluorescent material of the indigo plant prepared by embodiment 1 sending out under 445 nanometers excite
Penetrating spectrum, emission spectrum is the broadband HONGGUANG of 525nm-750nm, and peak value is at 610nm.
Fig. 3 is the light activated aluminate-based red fluorescent material luminous intensity of the indigo plant prepared by embodiment 1 and Eu content pass
It is schematic diagram, as seen from the figure, along with the increase of Eu ion concentration, luminous intensity first increases and then decreases, the luminous intensity when x=0.5
Reach maximum.
Fig. 4 is by the indigo plant light activated aluminate-based red fluorescent material La of embodiment 1 gained0.5Sr2AlO5: 0.5Eu and
LaSr2AlO5:Ce3+Yellow fluorescent powder 2:1 in mass ratio uniformly mixes the integrating sphere being placed on fluorescent material quantum yield tester
In, using 460nm blue-light LED chip as light source be radiated on powder body under the spectrum that records, its chromaticity coordinates be (0.3797,
0.3718), correlated color temperature is 3959K, spectrum is carried out Gauss curve fitting it can be seen that spectrum is made up of three parts: peak value is
Blue-light LED chip spectrum+the peak value of 460nm is the LaSr of 525nm2AlO5:Ce3+Broadband emission spectrum+the peak value of yellow fluorescent powder
La for 610nm0.5Sr2AlO5: the broadband emission spectrum of 0.5Eu red fluorescence powder.
Embodiment 2: blue light activated aluminate-based red fluorescent material La0.5-yGdySr2AlO5: 0.5Eu, preparation
With M1For La and Gd, M2For Sr, as a example by x=0.5, prepare M1 1-xM2 2AlO5: xEu,
La chosen by raw material2O3, SrCO3, Al2O3, Eu2O3And Gd2O3, by molecular formula La0.5-yGdySr2AlO5: 0.5Eu, (y=
0,0.05,0.10,0.15,0.20；) weigh raw material respectively:
0.8145 gram of La during y=02O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0 gram of Gd2O3;
0.7331 gram of La during y=0.052O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.0906
Gram Gd2O3;
0.6516 gram of La during y=0.102O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.1812
Gram Gd2O3;
0.5702 gram of La during y=0.152O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.2719
Gram Gd2O3;
0.4887 gram of La during y=0.202O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.3625
Gram Gd2O3;
Load weighted raw material is mixed 2 hours, at a temperature of 60 DEG C, is dried 6h, after being completely dried, raw material is contained in crucible
In, proceed in high temperature process furnances, after evacuation, be passed through N2And H2Volume ratio is the mixed atmosphere of 1:1, and 1500 DEG C of roastings 4 hours,
I.e. obtain the light activated aluminate-based red fluorescent material of described indigo plant.
Fig. 5 is the emission spectrum under 445 nanometers excite of the fluorescent material prepared by embodiment 2, and emission spectrum is
The broadband HONGGUANG of 525nm-750nm, peak value is at 610nm, along with Gd3+The increase of ion doping content, after luminous intensity first increases
Reducing, when y=0.10, luminous intensity reaches maximum.
Embodiment 3: blue light activated aluminate-based red fluorescent material La0.5Sr2-zCazAlO5: the preparation of 0.5Eu
With M1For La, M2For Sr and Ca, as a example by x=0.5, prepare M1 1-xM2 2AlO5: xEu,
La chosen by raw material2O3, SrCO3, Al2O3, Eu2O3And CaCO3, by molecular formula La0.5Sr2-zCazAlO5: 0.5Eu, (z=
0,0.1,0.2,0.3,0.4,0.6.1.0,1.5) raw material is weighed respectively:
0.8145 gram of La during z=02O3, 2.9526 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0 gram of CaCO3;
0.8145 gram of La during z=0.12O3, 2.8049 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.1001 gram
CaCO3;
0.8145 gram of La during z=0.22O3, 2.6573 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.2002 gram
CaCO3;
0.8145 gram of La during z=0.32O3, 2.5097 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.3003 gram
CaCO3;
0.8145 gram of La during z=0.42O3, 2.3621 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.4004 gram
CaCO3;
0.8145 gram of La during z=0.62O3, 2.0668 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 0.6005 gram
CaCO3;
0.8145 gram of La during z=1.02O3, 1.4763 grams of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 1.0001 grams
CaCO3;
0.8145 gram of La during z=1.52O3, 0.7381 gram of SrCO3, 0.5098 gram of Al2O3, 0.8798 gram of Eu2O3, 1.5014 grams
CaCO3;
Load weighted raw material is mixed 2 hours, at a temperature of 60 DEG C, is dried 6h, after being completely dried, raw material is contained in crucible
In, proceed in high temperature process furnances, after evacuation, be passed through N2And H2Volume ratio is the mixed atmosphere of 1:1, and 1400 DEG C of roastings 4 hours,
I.e. obtain the light activated aluminate-based red fluorescent material of described indigo plant.
Fig. 6 is the emission spectrum under 445 nanometers excite of the fluorescent material prepared by embodiment 3, and emission spectrum is
The broadband HONGGUANG of 525nm-750nm, peak value is adjustable in the range of 610nm-620nm, along with Ca2+The increase of ion doping content,
Luminous intensity first increases and then decreases, when z=0.6, luminous intensity reaches maximum.
Embodiment described above only have expressed embodiments of the present invention, and it describes more concrete and detailed, but can not
Therefore the restriction to the scope of the claims of the present invention it is interpreted as.It should be pointed out that, to those skilled in the art, do not taking off
On the premise of present inventive concept, it is also possible to make some improvement, these improvement broadly fall into protection scope of the present invention.
Claims (8)
1. the light activated aluminate-based red fluorescent material of indigo plant, has following molecular formula M1 1-xM2 2AlO5: xEu, by former in formula
Sub-molal quantity measures, 0.005≤x≤1.0；
In formula, M1For at least one in La or Gd of trivalent, M2For at least one in Sr or Ca of bivalence, Eu is bivalence.
The most blue light activated aluminate-based red fluorescent material, has following molecular formula: La1- xSr2AlO5: xEu, presses the metering of atomic molar number, 0.005≤x≤1.0 in formula.
The most blue light activated aluminate-based red fluorescent material, has following molecular formula: La1-x- yGdySr2AlO5: xEu, presses the metering of atomic molar number, 0.005≤x ＜ 1.0,0 ＜ y≤0.2 in formula.
The most blue light activated aluminate-based red fluorescent material, has following molecular formula: La0.5- yGdySr2AlO5: 0.5Eu formula is pressed the metering of atomic molar number, 0 ＜ y≤0.2.
The most blue light activated aluminate-based red fluorescent material, has following molecular formula: La1-xSr2- zCazAlO5: xEu, presses the metering of atomic molar number, 0.005≤x≤1.0,0 ＜ z≤1.5 in formula.
The most blue light activated aluminate-based red fluorescent material, has following molecular formula: La0.5Sr2- zCazAlO5: 0.5Eu, 0 ＜ z≤1.5.
7. a preparation method for blue light activated aluminate-based red fluorescent material as described in one of claim 1-6, it is special
Levy and be, specifically comprise the following steps that and form in proportion according to the molecular formula of blue light activated aluminate-based red fluorescent material respectively
Weigh each element oxide, at a temperature of 60 DEG C, be dried 6-10h after mixing 2-4h, after being placed in crucible, proceed to high temperature process furnances
In, evacuation, at N2And H2In 1400 DEG C-1500 DEG C roasting 4h under mixed atmosphere, i.e. obtain the light activated aluminate-base of described indigo plant
Red fluorescence material；Described N2And H2N in mixed atmosphere2And H2Volume ratio be 1:1.
8. as described in one of claim 1-6 blue light activated aluminate-based red fluorescent material in blue light excited white light LED
Application.
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| US8163203B2 (en) * | 2008-02-27 | 2012-04-24 | The Regents Of The University Of California | Yellow emitting phosphors based on Ce3+-doped aluminate and via solid solution for solid-state lighting applications |
| CN102191062B (en) * | 2010-03-12 | 2014-03-19 | 长春师范学院 | Red fluorescent powder for white light-emitting diode (LED) and preparation method thereof |
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2014
- 2014-06-19 CN CN201410277751.8A patent/CN104087299B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888221A (en) * | 2012-10-29 | 2013-01-23 | 江苏博睿光电有限公司 | Fluorescent powder for LED and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| LaSr2AlO5, a Versatile Host Compound for Ce3+-Based Yellow Phosphors: Structural Tuning of Optical Properties and Use in Solid-State White Lighting;Won Bin Im等;《Chem.Mater.》;20090531;第21卷(第13期);第2957–2966页 * |
| Photoluminescence Properties of Eu-Doped LaSr2AlO5;C.E.Rodríguez-García等;《Science of Advanced Materials》;20121031;第4卷;第563-567页 * |
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