CN117701279A - Blue fluorescent material for ultraviolet excitation type sunlight LED, and preparation method and application thereof - Google Patents
Blue fluorescent material for ultraviolet excitation type sunlight LED, and preparation method and application thereof Download PDFInfo
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- 230000005284 excitation Effects 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 51
- 238000001228 spectrum Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 8
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 20
- 238000005245 sintering Methods 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
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- 238000000034 method Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052765 Lutetium Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
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- 229910004298 SiO 2 Inorganic materials 0.000 description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001354 calcination Methods 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 238000011068 loading method Methods 0.000 description 6
- 239000004570 mortar (masonry) Substances 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
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- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
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- -1 rare earth ion Chemical class 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
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- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 description 1
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- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 1
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Abstract
The invention relates to a blue fluorescent material for a purple light excited sunlight LED and a preparation method thereof. The chemical expression of the fluorescent material is Li 2 Ba 8 Lu 2(1‑x) Si 6 O 24 :xCe 3+ Wherein x is more than or equal to 0.01 and less than or equal to 0.2. Compared with the prior art, the blue fluorescent material for the ultraviolet excitation type sunlight LED is novel ultraviolet excitation cerium doped oxide-based blue fluorescent powder, and the obtained fluorescent powder can emit blue light with the center wavelength of 440nm under 400nm ultraviolet excitation, so that ultraviolet excitation blue light emission is realized. The fluorescent powder is oxide-based fluorescent powder, has the outstanding advantages of stable physical and chemical properties, simple and convenient preparation, low cost, wide application prospect and the like, has the emission wavelength of 420-600 nm, has the quantum efficiency of 51 percent and is matched with ultraviolet excitationThe chip is suitable for applications such as ultraviolet excitation white light LEDs, ultraviolet excitation solar LEDs, ultraviolet excitation full spectrum LEDs and the like.
Description
Technical Field
The invention belongs to the technical field of fluorescent material preparation, and particularly relates to a blue fluorescent material for a purple light excitation type sunlight LED, and a preparation method and application thereof.
Background
White Light Emitting Diodes (LEDs) have been attracting attention in recent years as a next generation solid state lighting technology because of their energy saving, environmental protection, long life, high safety, and the like. The phosphor-converted white light LED (pc-WLED) is composed of single or multiple phosphors and chips, has the characteristics of adjustable spectrum and high Color Rendering Index (CRI), and is widely applied to the fields of display and illumination. Up to now there are many ways to achieve WLED illumination. From blue InGaN chip and yellow fluorescent powder Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ) Has been commercialized. Nevertheless, due to YAG: ce 3+ The fluorescent powder lacks green and red components, and has lower CRI value<80 High correlated color temperature>4500K) The application range of the blue light on the WLED is limited, and unconverted blue light is harmful to human health and is called blue light hazard. In recent years, high-quality full-spectrum WLED simulating solar spectrum is proposed to meet the requirements of sunlight-like healthy illumination. Currently, there are many commercially available red-green phosphors having high quantum efficiency, excellent chemical stability, and excellent thermal stability. However, the main obstacle to this approach is the lack of efficient blue phosphors, which further requires a small Stokes shift and can effectively convert the violet LED emission to blue light. Commercial blue fluorescent powder BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ) Although having higher quantum efficiency and excellent thermal stability, the material has relatively weak absorption in the purple light region and is not easy to be excited by 400nm lightAnd (5) hair growing. Furthermore, BAM: eu 2+ The high synthesis temperature of (2) necessarily increases the cost. The combination of violet chips and multicolor phosphors (blue/green/red) has become an alternative to high quality pc-WLED.
In the fluorescent powder material, the experimental conditions of the nitride fluorescent powder are very high, special reaction atmosphere is needed, the sintering temperature is very high, the price of the used raw materials is relatively high, the raw materials are difficult to synthesize under the general experimental conditions, and the preparation cost is high due to the reasons, so that the application of the nitride fluorescent powder in the daily lighting field is limited. The sulfide and fluoride fluorescent powder is unstable in chemical property, poor in thermal stability and easy to deliquesce, and in the preparation process, hydrogen sulfide, sulfur dioxide and other gases with great harm to the environment are easy to generate, so that the application of the sulfide and fluoride fluorescent powder in LEDs is limited.
Disclosure of Invention
The invention aims to provide a blue fluorescent material for a purple light excited sunlight-like LED, and a preparation method and application thereof, so as to meet urgent requirements of current white light LED, sunlight-like LED, full spectrum LED and healthy illumination LED light sources.
The aim of the invention can be achieved by the following technical scheme:
the invention firstly provides a novel blue fluorescent material for a purple light excitation type sunlight LED, and the chemical expression of the fluorescent material is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ Wherein x is more than or equal to 0.01 and less than or equal to 0.2. Wherein Li is 2 Ba 8 Lu 2(1-x) Si 6 O 24 As matrix material, ce 3+ Represents the partial substitution of Lu ions for the doping of the matrix material into ions Ce, x represents the molar content of the doping ions Ce.
In one embodiment of the present invention, preferably, x=0.01, 0.11, 0.05, 0.09, 0.1, 0.12.
In one embodiment of the invention, the blue fluorescent material for the ultraviolet excitation type solar light LED is a powdery material.
The blue fluorescent material for the ultraviolet excitation type sunlight LED can emit blue light with the spectral range covering 420-600 nm and the central wavelength being 440nm under the excitation of 400nm ultraviolet light.
The invention further provides a preparation method of the blue fluorescent material for the ultraviolet excitation type solar LED, which comprises the following steps:
(1) Weighing cerium source compound, lithium source compound, barium source compound, lutetium source compound and silicon source compound raw material powder according to a metering ratio, grinding to uniformly mix the raw material powder, and grinding to uniformly mix the raw material powder to obtain a mixture;
(2) And (3) sintering the mixture obtained in the step (1) at a high temperature, and cooling to obtain the blue fluorescent material for the ultraviolet excitation type solar LED.
In one embodiment of the present invention, in the step (1), the cerium source compound is a Ce-containing oxide, the lithium source compound is a Li-containing carbonate, the barium source compound is a Ba-containing carbonate, the lutetium source compound is a Lu-containing oxide, and the silicon source compound is a Si-containing oxide.
In one embodiment of the present invention, in the step (1), the raw material powder is ground for 5 to 120 minutes.
In one embodiment of the present invention, in step (2), the conditions of the high temperature sintering are: vacuumizing, maintaining the reducing atmosphere, and sintering at 500-1500 deg.c for 0.5-12 hr.
In one embodiment of the present invention, in step (2), the reducing atmosphere is selected from the group consisting of CO, H at high temperature sintering 2 And N 2 Or, CO, H 2 And N 2 Is a mixed gas of (a) and (b).
In one embodiment of the present invention, in step (2), the reducing atmosphere is selected from the group consisting of 5% by volume of H at high temperature sintering 2 With a volume fraction of 95% N 2 Is a mixed gas of (a) and (b).
In one embodiment of the present invention, in the step (2), the sintering temperature is more preferably 1200 to 1300 ℃ during the high-temperature sintering.
In one embodiment of the present invention, in the step (2), the sintering time is more preferably 4 to 5 hours at the time of high-temperature sintering.
In one embodiment of the present invention, in step (2), the system pressure is maintained at 0MPa during high temperature sintering.
In one embodiment of the present invention, in step (2), the method of high temperature sintering is: placing the mixture obtained in the step (1) into a crucible, placing a crucible boat into a vacuum tube furnace, vacuumizing, maintaining a reducing atmosphere, and sintering at 500-1500 ℃ for 0.5-12 hours to obtain the blue fluorescent material for the ultraviolet excitation type sunlight LED.
In one embodiment of the present invention, in step (2), the crucible at the time of high temperature sintering is selected as an alumina crucible.
In one embodiment of the invention, in step (2), cooling refers to cooling to room temperature.
The blue fluorescent material for the ultraviolet excitation type solar LED, which is obtained by the preparation method, is a powdery material.
The invention further provides application of the blue fluorescent material for the ultraviolet excitation type solar LED, and the blue fluorescent material for the ultraviolet excitation type solar LED is used for preparing an LED chip.
The invention further provides an LED chip, which comprises the blue fluorescent material for the ultraviolet excitation type sunlight LED. The LED chip can be applied to ultraviolet excitation white light LEDs, ultraviolet excitation solar light LEDs and ultraviolet excitation full-spectrum LEDs.
The blue fluorescent powder for the ultraviolet excitation type sunlight LED can meet the urgent requirements of the existing ultraviolet excitation type sunlight LED, ultraviolet excitation type sunlight LED and ultraviolet excitation full-spectrum LED.
The oxide fluorescent powder has the obvious advantages of excellent optical performance, high mechanical degree, stable performance, simple preparation condition, low cost and the like, so the oxide is a good fluorescent powder matrix material.
Ce in rare earth ion 3+ And Eu 2+ The 5d electron external layer orbitals of (2) are greatly affected by the surrounding crystal field environment, so Ce 3 + And Eu 2+ The d-f transitions of (c) exhibit different color emissions in different host materials. In contrast, according to the Laplaud's rule (4 f electricThe electrons are shielded by 5s and 5 p), rare earth ions Ln 3+ 4f-4f transition (e.g. Eu 3+ And Tb 3+ ) Is forbidden, which results in Ln 3+ Typically exhibiting sharp excitation peaks and narrow band emissions. And Ce (Ce) 3+ And Eu 2+ Excitation and emission processes between 4f and 5d energy levels are both astronomical and spin-allowed, so that the luminescence intensity is higher, and is a very typical dopant ion.
The invention provides a novel unreported blue fluorescent material for a purple light excitation type sunlight LED, which is novel purple light excitation cerium doped oxide-based blue fluorescent powder, and the obtained fluorescent powder can emit blue light with the center wavelength of 440nm under 400nm of purple light excitation to realize the blue light excitation emission.
The fluorescent powder is oxide-based fluorescent powder, has the outstanding advantages of stable physical and chemical properties, simple and convenient preparation, low cost, wide application prospect and the like, has the emission wavelength of 420-600 nm, has the quantum efficiency of 51 percent, is matched with a purple light excitation chip, and is suitable for applications such as purple light excitation white light LEDs, purple light excitation solar LEDs, purple light excitation full-spectrum LEDs and the like.
Compared with the prior art, the blue fluorescent material for the ultraviolet excitation type sunlight LED and the preparation method and application thereof are innovative in that:
(1) The fluorescent powder can emit blue light with the spectrum range covering 420-600 nm and the center wavelength being 440nm under the excitation of 400nm purple light, the quantum efficiency can reach 51%, and the quantum efficiency is not reported.
(2) Compared with the prior art, the fluorescent powder is Ce 3+ The doped oxide-based blue light emitting fluorescent powder has the advantage of stable physical and chemical properties, can be prepared by adopting a conventional solid phase reaction method, has the characteristics of simple preparation process and contribution to industrial production, and is a good candidate material which can be widely applied.
(3) The fluorescent powder can be well matched with the existing ultraviolet chip, meets the commercial market demand, and is suitable for ultraviolet excitation white light LEDs, ultraviolet excitation solar light LEDs, ultraviolet excitation full spectrum LEDs and the like.
Drawings
FIG. 1 is a photo-excitation-emission spectrum of blue phosphor for a sunlight-based LED excited by ultraviolet light prepared in examples 1 to 3 of the present invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Example 1:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0306:0.6548:0.1642:0.1495:0.0007).
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the alumina crucible in a reducing atmosphere mixed by hydrogen and nitrogen for calcining at 1300 ℃ for 4 hours, and then cooling to room temperature to obtain a target product.
3. The spectral properties of the phosphor of this system were tested using a fluorescence spectrometer (HITACHI F-7000), as shown in FIG. 1. The result shows that the fluorescent powder of the system has wider excitation band, covers ultraviolet and purple light areas, has a peak value near 400nm and a higher spectrum peak value, and can be effectively excited by ultraviolet and purple light chips and well matched with the purple light chips. Under the excitation of a 400nm purple light source, the fluorescent powder emits bright blue light, and the emission spectrum is composed of a wider emission band (420-600 nm), and the peak value is positioned at 440nm.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.01.
Example 2:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0307:0.6560:0.1562:0.1498:0.0071).
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the mixture in a reducing atmosphere mixed with hydrogen and nitrogen for calcining at 1200 ℃ for 5 hours, and then cooling to room temperature to obtain a target product.
3. The spectral properties of the phosphor of this system were tested using a fluorescence spectrometer (HITACHI F-7000), as shown in FIG. 1. The result shows that the fluorescent powder of the system has wider excitation band, covers ultraviolet and purple light areas, has a peak value near 400nm and a higher spectrum peak value, and can be effectively excited by ultraviolet and purple light chips and well matched with the purple light chips. Under the excitation of a 400nm purple light source, the fluorescent powder emits bright blue light, and the emission spectrum is composed of a wider emission band (420-600 nm), and the peak value is positioned at 440nm.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.11.
Example 3:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0306:0.6551:0.1610:0.1496:0.0035).
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the alumina crucible in a reducing atmosphere mixed with hydrogen and nitrogen for calcining at 1250 ℃ for 5 hours, and then cooling to room temperature to obtain a target product.
3. The spectral properties of the phosphor of this system were tested using a fluorescence spectrometer (HITACHI F-7000), as shown in FIG. 1. The result shows that the fluorescent powder of the system has wider excitation band, covers ultraviolet and purple light areas, has a peak value near 400nm and a higher spectrum peak value, and can be effectively excited by ultraviolet and purple light chips and well matched with the purple light chips. Under the excitation of a 400nm purple light source, the fluorescent powder emits bright blue light, and the emission spectrum is composed of a wider emission band (420-600 nm), and the peak value is positioned at 440nm.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.05.
The compositions of the raw materials and the process parameters of the blue fluorescent powder for the ultraviolet excitation type solar LED in the different examples 1-3 are shown in the table 1.
TABLE 1 preparation process parameters for examples 1-3
Example 4:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0306:0.6554:0.1577:0.1496:0.0064).
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the alumina crucible in a reducing atmosphere mixed by hydrogen and nitrogen for calcining at 1150 ℃ for 4 hours, and then cooling to room temperature to obtain a target product. The photoluminescent properties of the luminescent material are similar to those in example 1.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.09.
Example 5:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0306:0.6555:0.1569:0.1496:0.0071).
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the alumina crucible in a reducing atmosphere mixed with hydrogen and nitrogen for calcination at 1450 ℃ for 5 hours, and then cooling to room temperature to obtain a target product. The photoluminescent properties of the luminescent material are similar to those in example 1.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.1.
Example 6:
the embodiment provides a preparation method of blue fluorescent powder for a purple light excitation type sunlight LED, which comprises the following steps:
1. weighing one part of Li according to stoichiometric ratio 2 CO 3 、BaCO 3 、Lu 2 O 3 、SiO 2 、CeO 2 (the mass ratio of each raw material is Li) 2 CO 3 :BaCO 3 :Lu 2 O 3 :SiO 2 :CeO 2 =0.0306:0.6556:0.1553:0.1497:0.0085) 1g of raw powder.
2. Grinding the raw material mixture in an agate mortar for 30 to 60 minutes, loading the mixture into an alumina crucible after the materials are uniformly mixed, placing the mixture in a reducing atmosphere mixed with hydrogen and nitrogen for calcining at 1200 ℃ for 6 hours, and then cooling to room temperature to obtain a target product. The photoluminescent properties of the luminescent material are similar to those in example 1.
The general formula of the Ce single-doped blue light emitting fluorescent powder excited by the purple light obtained in the embodiment is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ X is 0.12.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. A blue fluorescent material for a purple light excitation type sunlight LED is characterized in that the chemical expression of the fluorescent material is Li 2 Ba 8 Lu 2(1-x) Si 6 O 24 :xCe 3+ Wherein x is more than or equal to 0.01 and less than or equal to 0.2.
2. The blue fluorescent material for a violet light excitation type solar LED according to claim 1, wherein x=0.01, 0.11, 0.05, 0.09, 0.1, 0.12.
3. The blue fluorescent material for a violet light excitation type solar LED according to claim 1, wherein the blue fluorescent material for a violet light excitation type solar LED is a powdery material.
4. The blue fluorescent material for the ultraviolet excitation type solar LED according to claim 1, wherein the blue fluorescent material for the ultraviolet excitation type solar LED can emit blue light with a spectrum range of 420-600 nm and a center wavelength of 440nm under the excitation of 400nm ultraviolet light.
5. The method for preparing the blue fluorescent material for the ultraviolet excitation type solar LED according to any one of claims 1 to 4, comprising the steps of:
(1) Weighing cerium source compound, lithium source compound, barium source compound, lutetium source compound and silicon source compound raw material powder according to a metering ratio, grinding to uniformly mix the raw material powder, and grinding to uniformly mix the raw material powder to obtain a mixture;
(2) And (3) sintering the mixture obtained in the step (1) at a high temperature, and cooling to obtain the blue fluorescent material for the ultraviolet excitation type solar LED.
6. The method of producing a blue fluorescent material for a violet light excited solar LED according to claim 5, wherein in the step (1), the cerium source compound is a Ce-containing oxide, the lithium source compound is a Li-containing carbonate, the barium source compound is a Ba-containing carbonate, the lutetium source compound is a Lu-containing oxide, and the silicon source compound is a Si-containing oxide.
7. The method for preparing a blue fluorescent material for a violet light excited solar LED as defined in claim 5, wherein in the step (2), the conditions of high temperature sintering are as follows: vacuumizing, maintaining the reducing atmosphere, and sintering at 500-1500 deg.c for 0.5-12 hr.
8. The method for preparing a blue fluorescent material for a violet light excited solar LED according to claim 5, wherein in the step (1), the grinding time of the raw material powder is 5-120 min;
in the step (2), the reducing atmosphere is selected from CO and H during high-temperature sintering 2 And N 2 Or, CO, H 2 And N 2 Is a mixed gas of (a) and (b).
9. The use of the blue fluorescent material for the ultraviolet excitation type solar light LED according to any one of claims 1 to 4, wherein the blue fluorescent material for the ultraviolet excitation type solar light LED is used for preparing an LED chip.
10. An LED chip comprising the blue fluorescent material for a violet-excited solar LED according to any one of claims 1 to 4.
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