CN109536169A - A kind of white light LEDs single matrix silicate white fluorescent powder and preparation method thereof - Google Patents
A kind of white light LEDs single matrix silicate white fluorescent powder and preparation method thereof Download PDFInfo
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- CN109536169A CN109536169A CN201811503326.0A CN201811503326A CN109536169A CN 109536169 A CN109536169 A CN 109536169A CN 201811503326 A CN201811503326 A CN 201811503326A CN 109536169 A CN109536169 A CN 109536169A
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- 239000000843 powder Substances 0.000 title claims abstract description 64
- 239000011159 matrix material Substances 0.000 title claims abstract description 17
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 9
- 230000005284 excitation Effects 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 24
- 238000000227 grinding Methods 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 7
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 235000019441 ethanol Nutrition 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910003443 lutetium oxide Inorganic materials 0.000 claims description 7
- 239000011656 manganese carbonate Substances 0.000 claims description 7
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 238000000695 excitation spectrum Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 238000000295 emission spectrum Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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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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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
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- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a kind of white light LEDs single matrix silicate white fluorescent powder and preparation method thereof, the chemical general formula of the white emitting fluorescent powder is Ca3‑x‑y‑zLu2Si3O12:xCe3+,yTb3+,zMn2+, wherein 0 < x≤0.005,0≤y≤0.3,0≤z≤0.2；Stoichiometrically weigh each raw material, ground and mixed is dry be placed on the sintering of tube furnace high temperature to get.Fluorescent powder sample produced by the present invention launches white light under the excitation of ultraviolet light, and luminous intensity is high, excellent heat stability；It is preparation method safety provided by the invention, simple production process, at low cost, it is environmental-friendly, it is suitble to industrialization large-scale production.
Description
Technical field
The invention belongs to phosphor fields, are related to a kind of white emitting fluorescent powder, in particular to a kind of white light LEDs are used
Single matrix silicate white fluorescent powder and preparation method thereof.
Background technique
White light emitting diode (Light Emitting Diode, abbreviation LED) have low energy consumption, the pollution-free, long-life,
The advantages that small in size, response is fastly, designability is strong, has received widespread attention.By the development of last decade, white light LEDs are answered
With being expanded in social all conglomeraties and industry from lighting area, such as in TV, mobile phone, automotive lighting, high precision instrument
Equal fields, have established the good developing state of white light LEDs.It so far, include two using the mainstream scheme that LED obtains white light
Kind: one is coat yellow fluorescent powder (Y on blue-ray LED surface3Al5O12:Ce3+) mode；Another kind is by ultraviolet LED core
Piece obtains white light in conjunction with red, green, blue three primary colors fluorescent powder.The former is the currently commercially realization white light LEDs generallyd use
Mode, still, due to Y3Al5O12:Ce3+Fluorescent powder lacks the red emission of long-wave band, the white light LEDs for causing such mode to prepare
Light source colour rendering index is relatively low, and colour temperature is higher, it is difficult to meet the requirement of high performance device.Relative to the former, the latter has RGB
Three kinds of earth complex luminescent components can be realized colour temperature and photochromic adjustable, have great application prospect.
But the prior art is mostly to adjust out white light by the proportion for changing the fluorescent powder of three kinds of colors of red, green, blue,
There are feux rouges or green lights to the re-absorption phenomenon of blue light, and exists for the red fluorescence powder of UV LED chip activation and shine
The defects of low efficiency, poor chemical stability and thermal stability.Panchromatic single-substrate white fluorescent powder can overcome mixed to a certain extent
The deficiency for closing fluorophor, improves luminous efficiency and colour rendering index；Packaging technology can also be simplified simultaneously.Therefore exploitation is suitble to ultraviolet
Excitation efficient single-substrate white fluorescent powder by be White-light LED illumination of new generation research hotspot, have wide Economic Application
Value.
Summary of the invention
The object of the present invention is to provide a kind of white light LEDs single matrix silicate white fluorescent powder, good luminous performances.
It is a further object of the present invention to provide the above-mentioned white light LEDs preparation method of single matrix silicate white fluorescent powder,
Simple process, safety non-pollution.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of single matrix silicate white of white light LEDs
Fluorescent powder, chemical general formula are as follows: Ca3-x-y-zLu2Si3O12:xCe3+,yTb3+,zMn2+, wherein 0 < x≤0.005,0≤y≤
0.3,0≤z≤0.2.
Above-mentioned fluorescent powder launches white light under the ultraviolet excitation of 340nm.
The present invention also provides the above-mentioned white light LEDs preparation methods of single matrix silicate white fluorescent powder, including following step
It is rapid:
(1) according to Ca3-x-y-zLu2Si3O12:xCe3+,yTb3+,zMn2+The stoichiometric ratio of middle each element accurately weighs raw material
CaCO3、Lu2O3、SiO2、CeO2、Tb4O7、MnCO3, wherein 0 < x≤0.005,0≤y≤0.3,0≤z≤0.2；It will be load weighted
Raw material is placed in mortar, and a small amount of ethyl alcohol grinding 10-30min is added, dry after grinding uniformly, obtains raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcined, calcination temperature be 1300-1500 DEG C, keep the temperature 2-4h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, it is white to obtain single matrix silicate after grinding
Emitting phosphor.
Preferably, condition dry described in step (1) are as follows: vacuum drying, temperature are 60-80 DEG C, time 1-3h.
Preferably, the heating rate in step (2) when calcining is 300-600 DEG C/h.
Preferably, crucible described in step (2) selects high purity aluminium oxide crucible.
The present invention provides a kind of Ce3+、Tb3+、Mn2+The single Ca of codope3Lu2Si3O12Matrix white fluorescent powder, in purple
Outer light excites the lower fluorescent powder that can issue white light, has the advantages that luminous intensity is big, luminous efficiency is high, thermal stability is good.This
Invention has the characteristics that simple production process, safe, at low cost, environmental-friendly, can obtain luminescent properties preferably, it is mutually with high purity
Fluorescent powder.
Detailed description of the invention
Fig. 1 is the X ray diffracting spectrum of fluorescent powder prepared by the embodiment of the present invention 1,2,3.
Fig. 2 is the excitation spectrum of fluorescent powder prepared by the embodiment of the present invention 1,2,3.
Fig. 3 is the emission spectrum of fluorescent powder prepared by the embodiment of the present invention 1,2,3.
Fig. 4 is the chromaticity coordinates figure of fluorescent powder prepared by the embodiment of the present invention 1,2,3.
The stereoscan photograph for the fluorescent powder that in Fig. 5 present invention prepared by embodiment 1.
The stereoscan photograph for the fluorescent powder that in Fig. 6 present invention prepared by embodiment 2.
The stereoscan photograph for the fluorescent powder that in Fig. 7 present invention prepared by embodiment 3.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Material powder used in following embodiment is commercially available commercial powder.
Embodiment 1:
(1) target product Ca is set2.595Lu2Si3O12:0.005Ce3+,0.2Tb3+,0.2Mn2+Quality be 2.5g, press
The ratio between amount of substance according to Ca:Lu:Si:Ce:Tb:Mn is that the ratio of 2.595:2:3:0.005:0.2:0.2 weighs raw materials of Ca CO3
(99%), Lu2O3(99.99%), SiO2(99%), CeO2(99.99%), Tb4O7(99.99%) and MnCO3(99%), will
Load weighted raw material is placed in mortar, and a small amount of ethyl alcohol grinding 30min is added, is placed in vacuum together with mortar after grinding uniformly
In drying box, the dry 2h at 80 DEG C is dried, uniformly mixed raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcine 3h at 1450 DEG C, heating rate is 600 DEG C/h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, obtains fluorescent powder finished product after grinding.
Embodiment 2
(1) target product Ca is set2.695Lu2Si3O12:0.005Ce3+,0.2Tb3+,0.1Mn2+Quality be 2.5g, press
The ratio between amount of substance according to Ca:Lu:Si:Ce:Tb:Mn is that the ratio of 2.695:2:3:0.005:0.2:0.1 weighs raw materials of Ca CO3
(99%), Lu2O3(99.99%), SiO2(99%), CeO2(99.99%), Tb4O7(99.99%) and MnCO3(99%), will
Load weighted raw material is placed in mortar, and a small amount of ethyl alcohol grinding 30min is added, is placed in vacuum together with mortar after grinding uniformly
In drying box, the dry 2h at 80 DEG C is dried, uniformly mixed raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcine 3h at 1450 DEG C, heating rate is 600 DEG C/h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, obtains fluorescent powder finished product after grinding.
Embodiment 3
(1) target product Ca is set2.495Lu2Si3O12:0.005Ce3+,0.3Tb3+,0.2Mn2+Quality be 2.5g, press
The ratio between amount of substance according to Ca:Lu:Si:Ce:Tb:Mn is that the ratio of 2.495:2:3:0.005:0.3:0.2 weighs raw materials of Ca CO3
(99%), Lu2O3(99.99%), SiO2(99%), CeO2(99.99%), Tb4O7(99.99%) and MnCO3(99%), will
Load weighted raw material is placed in mortar, and a small amount of ethyl alcohol grinding 30min is added, is placed in vacuum together with mortar after grinding uniformly
In drying box, the dry 2h at 80 DEG C is dried, uniformly mixed raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcine 3h at 1450 DEG C, heating rate is 600 DEG C/h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, obtains fluorescent powder finished product after grinding.
Fig. 1 be the embodiment of the present invention 1,2,3 prepare fluorescent powder sample XRD spectrum, by with JCPDS#87-0453
Standard card comparison, can be good at matching, and illustrate that the sample of synthesis is Ca3Lu2Si3O12Crystal phase structure, a small amount of Ce3+, Tb3+、
Mn2+Doping do not generate miscellaneous phase.
Fig. 2 is the excitation spectrum of fluorescent powder prepared by the embodiment of the present invention 1,2,3.The excitation spectrum of the fluorescent powder of preparation is equal
It is wide range wavestrip of the wave-length coverage in 300~400nm, illustrates that ultraviolet light can be efficiently absorbed, can be applied to ultraviolet leds
The white light LED part of chip excitation.
Fig. 3 is emission spectrum of the fluorescent powder of the preparation of the embodiment of the present invention 1,2,3 under 340nm ultraviolet excitation.By scheming
It is found that the launch wavelength coverage area of the fluorescent powder of synthesis is 350~700nm, emission spectrum includes red, green, blue wave band, can
Realize white light.
Fig. 4 is the chromaticity coordinates figure of fluorescent powder prepared by the embodiment of the present invention 1,2,3.As can be seen from Figure, prepared by embodiment 1
The chromaticity coordinates of fluorescent powder is (0.3054,0.3484), and the chromaticity coordinates of fluorescent powder prepared by embodiment 2 is (0.3484,0.3531),
The chromaticity coordinates for the fluorescent powder that embodiment 3 synthesizes is (0.3941,0.3932), is respectively positioned on white light field, realizes white light emission.
Fig. 5 to Fig. 7 is respectively the stereoscan photograph of fluorescent powder prepared by the embodiment of the present invention 1,2,3.It can be seen by figure
Out, the fluorescent powder of preparation has preferable dispersibility, and crystallinity is high.
Embodiment 5
(1) target product Ca is set2.595Lu2Si3O12:0.005Ce3+,0.2Tb3+,0.2Mn2+Quality be 2.5g, according to
The ratio between amount of substance of Ca:Lu:Si:Ce:Tb:Mn is that the ratio of 2.595:2:3:0.005:0.2:0.2 weighs raw materials of Ca CO3
(99%), Lu2O3(99.99%), SiO2(99%), CeO2(99.99%), Tb4O7(99.99%) and MnCO3(99%), will
Load weighted raw material is placed in mortar, and a small amount of ethyl alcohol grinding 30min is added, is placed in vacuum together with mortar after grinding uniformly
In drying box, the dry 1h at 80 DEG C is dried, uniformly mixed raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcine 4h at 1300 DEG C, heating rate is 500 DEG C/h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, obtains fluorescent powder finished product after grinding.
The XRD spectrum of fluorescent powder sample manufactured in the present embodiment, excitation spectrum, the transmitting under 340nm ultraviolet excitation
Spectrum, chromaticity coordinates are similar with embodiment 1.
Embodiment 6
(1) target product Ca is set2.595Lu2Si3O12:0.005Ce3+,0.2Tb3+,0.2Mn2+Quality be 2.5g, press
The ratio between amount of substance according to Ca:Lu:Si:Ce:Tb:Mn is that the ratio of 2.595:2:3:0.005:0.2:0.2 weighs raw materials of Ca CO3
(99%), Lu2O3(99.99%), SiO2(99%), CeO2(99.99%), Tb4O7(99.99%) and MnCO3(99%), will
Load weighted raw material is placed in mortar, and a small amount of ethyl alcohol grinding 30min is added, is placed in vacuum together with mortar after grinding uniformly
In drying box, the dry 3h at 60 DEG C is dried, uniformly mixed raw mixture；
(2) raw mixture for obtaining step (1) is packed into high purity aluminium oxide crucible, is subsequently placed in tube furnace,
5%H2/ 95%N2Weakly reducing atmosphere under calcine 2h at 1500 DEG C, heating rate is 300 DEG C/h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, obtains fluorescent powder finished product after grinding.
The XRD spectrum of fluorescent powder sample manufactured in the present embodiment, excitation spectrum, the transmitting under 340nm ultraviolet excitation
Spectrum, chromaticity coordinates are similar with embodiment 1.
Claims (6)
1. a kind of single matrix silicate white fluorescent powder of white light LEDs, which is characterized in that its chemical general formula are as follows: Ca3-x-y- zLu2Si3O12:xCe3+,yTb3+,zMn2+, wherein 0 < x≤0.005,0≤y≤0.3,0≤z≤0.2.
2. the single matrix silicate white fluorescent powder of white light LEDs according to claim 1, which is characterized in that the fluorescent powder
Under the ultraviolet excitation of 340nm, launch white light.
3. a kind of white light LEDs of any of claims 1 or 2 preparation method of single matrix silicate white fluorescent powder, feature
It is, comprising the following steps:
(1) according to Ca3-x-y-zLu2Si3O12:xCe3+,yTb3+,zMn2+The stoichiometric ratio of middle each element accurately weighs raw material
CaCO3、Lu2O3、SiO2、CeO2、Tb4O7、MnCO3, wherein 0 < x≤0.005,0≤y≤0.3,0≤z≤0.2；It will be load weighted
Raw material is placed in mortar, and a small amount of ethyl alcohol grinding 10-30min is added, dry after grinding uniformly, obtains raw mixture；
(2) raw mixture for obtaining step (1) is packed into crucible, is subsequently placed in tube furnace, in 5%H2/ 95%N2It is weak
It is calcined under reducing atmosphere, calcination temperature is 1300-1500 DEG C, keeps the temperature 2-4h；
(3) fluorescent powder that step (2) synthesis is taken out after cooled to room temperature, it is glimmering to obtain single matrix silicate white after grinding
Light powder.
4. the white light LEDs according to claim 3 preparation method of single matrix silicate white fluorescent powder, feature exist
In dry condition described in step (1) are as follows: vacuum drying, temperature are 60-80 DEG C, time 1-3h.
5. the white light LEDs according to claim 3 preparation method of single matrix silicate white fluorescent powder, feature exist
In the heating rate in step (2) when calcining is 300-600 DEG C/h.
6. the white light LEDs according to claim 3 preparation method of single matrix silicate white fluorescent powder, feature exist
In crucible described in step (2) selects high purity aluminium oxide crucible.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112391166A (en) * | 2020-11-20 | 2021-02-23 | 南京林业大学 | Ce3+-Mn2+Co-activated efficient near-infrared fluorescent powder and preparation method and application thereof |
| CN115820255A (en) * | 2022-12-21 | 2023-03-21 | 云南大学 | Single-matrix warm white fluorescent powder and preparation method thereof |
-
2018
- 2018-12-10 CN CN201811503326.0A patent/CN109536169A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| F. PICCINELLI: "Crystal structure and optical spectroscopy of Ca3Ln2Si3O12 (Ln = Gd andLu) doped with Eu3+", 《OPTICAL MATERIALS》 * |
| SAYD ALI KHAN: "Preparation and Luminescence Properties of Rare earth Doped Silicate Phosphors for White Light Emitting Diodes", 《中国博士学位论文全文数据库》 * |
| 刘杰: "白光发光二极管用单一基质白光荧光粉", 《化学进展》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112391166A (en) * | 2020-11-20 | 2021-02-23 | 南京林业大学 | Ce3+-Mn2+Co-activated efficient near-infrared fluorescent powder and preparation method and application thereof |
| CN115820255A (en) * | 2022-12-21 | 2023-03-21 | 云南大学 | Single-matrix warm white fluorescent powder and preparation method thereof |
| CN115820255B (en) * | 2022-12-21 | 2023-09-26 | 云南大学 | Single-matrix warm white fluorescent powder and preparation method thereof |
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Application publication date: 20190329 |