CN107286935A - A kind of tungsten molybdate red phosphor of multi-element doping - Google Patents
A kind of tungsten molybdate red phosphor of multi-element doping Download PDFInfo
- Publication number
- CN107286935A CN107286935A CN201710467315.0A CN201710467315A CN107286935A CN 107286935 A CN107286935 A CN 107286935A CN 201710467315 A CN201710467315 A CN 201710467315A CN 107286935 A CN107286935 A CN 107286935A
- Authority
- CN
- China
- Prior art keywords
- ball milling
- moo
- tungsten molybdate
- ball
- fluorescent material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
Abstract
Patent of the present invention is related to tungsten molybdate red phosphor of a kind of multi-element doping and preparation method thereof, belongs to luminescent material technical field.Phosphor molecule formula is ALn1‑a‑b(WO4)2‑x(MoO4)x:aEu3+,bRE3+, A is Li in formula, Na, at least one of K；Ln is Y, Gd, La, at least one of Lu；RE is Bi, Sm, at least one of Tb, wherein 0<x<2；0<a<0.2；0<b<0.05.Mentality of designing is：With Eu3+For the centre of luminescence, using alkali metal Rare-Earth Tungsten molybdate solid solution as matrix, Bi is added3+Deng for sensitizer, efficient red emission is realized by the introducing and interionic reciprocation of defect in matrix structure.Preparation method is：Various oxide raw materials are weighed by the stoichiometric proportion of molecular formula each element, after addition fluxing agent is mixed through ball milling, is placed in resistance furnace and calcines, product is ground to obtain required fluorescent material.The tungsten molybdate red phosphor can effectively absorb black light and efficient transmission goes out the fluorescence of red.
Description
Technical field
The invention belongs to luminescent material technical field, and in particular to a kind of silicate red fluorescence of the tungsten of multi-element doping
Powder.
Background technology
As a kind of new solid light source, white light LEDs have fast reaction speed, small volume, long lifespan, heating
The advantages of low, energy-saving and environmental protection, be described as forth generation green illumination light source, be widely used in indoor and outdoor lighting, billboard,
Stop-light, mobile phone, backlight of liquid crystal display etc..At present, the main stream approach for realizing white light LEDs is by blue light InGaN
Chip and yellow fluorescent powder are combined into white light LEDs.Though such white light LEDs luminous efficiency exceedes fluorescent lamp, due to blue light core
Piece causes it to there is high color temperature because the luminous intensity that lighting angle problem is present is uneven and yellow fluorescent powder lacks red emission
(>5000K), strong dazzle, low colour rendering index (Ra<Etc. 80) defect, have impact on LED popularization and application.To solve the above problems, near
Nian Lai, people begin attempt to excite red, green, blue three primary colors fluorescent powder using ultraviolet-near ultraviolet (350~410nm) chip, or
With blue-light LED chip plus green and red fluorescence powder, high-color rendering, the white light LEDs of low colour temperature are obtained.
At present, can be less by near ultraviolet excitated high-performance fluorescent material, especially red fluorescence powder, its luminous efficiency and
Intensity is below blue, green emitting phosphor, and there are problems that matrix is unstable, optical attenuation.The nearly purple reported both at home and abroad
Outer LED red fluorescence powders mainly have the systems, such as Y such as sulfide systems, vanadium phosphate system, nitrogen (oxygen) compound2O2S:Eu3 +、Sr2Si5N8:Eu2+、M1.95Eu0.05Si5-yAlyN8-xOx(M=Ca, Sr, Ba), Ca4(PO4)2O:Eu2+、Y4O(OH)9NO3:Eu3+
Deng.Wherein, sulfide-based fluorescent powder packaging usage ratio big (80%), effective excitation wavelength is small, stability is not enough, it is easy decompose,
The conditions such as high temperature, the high nitrogen pressure that the synthesis of nitride-based fluorescent material needs are harsher, and preparation technology is also more complicated, phosphoric acid
Salt and Nitrates fluorescent material then under near ultraviolet excitation emissive porwer and quantum efficiency than relatively low.Many patents before
There is the shortcomings of manufacturing cost is high, pollution is big, performance is unstable in the preparation of fluorescent material, and study the tungsten for finding scheelite-type structure
Hydrochlorate has excellent physics and chemical stability, and has strong wide band absorption in ultraviolet-black light area, it is considered to be reason
The luminous host thought.Therefore, it is necessary to which ultraviolet-used near ultraviolet LED tungsten hydrochlorate base red for researching and developing novel high-performance is glimmering
Light powder.
The preparation method of fluorescent material, mainly have at present high temperature solid-state method, chemical coprecipitation, sol-gal process, hydro-thermal method,
Microwave method, combustion method, spray pyrolysis etc., wherein high temperature solid-state method be at present it is main be also most ripe fluorescent material preparation side
Method.Ball milling high temperature solid-state method is easy to operate, cost is low, and the strong occlusion abrasive action of mechanical force is utilized on the premise of water is not introduced
The contact between solids can be improved, make to produce efficient mixing between salts reaction raw material, improve the efficiency of reaction.
The content of the invention
It is an object of the invention to overcome the shortcomings of existing white light LEDs art, there is provided a kind of tungsten of multi-element doping
Molybdate red phosphor and preparation method thereof.The tungsten molybdate red phosphor of multi-element doping of the present invention, composition
For ALn1-a-b(WO4)2-x(MoO4)x:aEu3+,bRE3+, A is Li in formula, Na, at least one of K；Ln is Y, Gd, La, in Lu extremely
Few one kind；RE is Bi, Sm, at least one of Tb, wherein 0<x<2；0<a<0.2；0<b<0.05.The present invention is consolidated using ball milling high temperature
Phase chemical reaction method prepares red fluorescence powder ALn1-a-b(WO4)2-x(MoO4)x:aEu3+,bRE3+, this method is reliable, stably, easily grasp
Make, and easily realize that chemical reaction metering target, yield be high, accessory substance it is few low even without, energy consumption, fluorescent powder grain is homogeneous.
Mentality of designing is：With Eu3+For the centre of luminescence, using alkali metal Rare-Earth Tungsten molybdate solid solution as matrix, Bi is added3+
Deng for sensitizer, efficient red emission is realized by the introducing and interionic reciprocation of defect in matrix structure.This hair
Bright technical scheme is comprised the following steps that：
(1) according to molecular formula ALn1-a-b(WO4)2-x(MoO4)x:aEu3+,bRE3+, A is stoichiometrically weighed respectively2CO3、
Ln2O3、WO3、MoO3、Eu2O3And RE2O3；
(2) reaction raw materials gross mass 0.05wt%~1.0wt% fluxing agent is weighed again；
(3) load weighted raw material and fluxing agent are moved into agate jar, adds agate abrading-ball, add appropriate ball milling
Agent, at room temperature 1~3h of ball milling；
(4) by the material after ball milling together with washing lotion suction filtration, after drying, to be calcined in resistance furnace, calcining heat is 900 DEG C~
1300 DEG C, calcination time is 2~6h, and target product is produced after grinding of coming out of the stove.
In the present invention, fluxing agent described in step (1) is H3BO3、SrF2、BaF2In one or more.
In the present invention, ratio of grinding media to material is 2 in step (3)：1, the ball milling agent is absolute ethyl alcohol.
Compared with prior art, the invention has the advantages that：
1st, the present invention improves luminescent properties by introducing a variety of matrix replacement ions and sensitizer, the fluorescent material prepared
The black light in the range of 360~420nm can be effectively absorbed, can be used as current near ultraviolet red fluorescent powder for white LED.
2nd, the fluorescent powder grain for preparing of the present invention is homogeneous, and crystallinity and paintability are good, with the good characteristics of luminescence and
Stability.
3rd, the present invention is ground using the strong occlusion of mechanical force and made using calcine technology of high temperature solid-state method of advance ball milling
With, the contact between solids can be improved, the efficiency of reaction is improved, compared with traditional high temperature solid-state method, calcining heat is low, when
Between it is short, production efficiency is high.
Brief description of the drawings
Fig. 1 is a kind of technique stream of the preparation method of the tungsten molybdate red phosphor for multi-element doping that the present invention is provided
Cheng Tu；
Fig. 2 is LiGd of the present invention0.88(WO4)(MoO4):0.08Eu3+,0.02Tb3+,0.02Bi3+The X of red fluorescence powder is penetrated
Line diffraction spectrogram；
Fig. 3 is LiGd of the present invention0.88(WO4)(MoO4):0.08Eu3+,0.02Tb3+,0.02Bi3+Red fluorescence powder is excited
With launching light spectrogram.
Embodiment
Embodiment 1
According to molecular formula LiY0.985(WO4)1.8(MoO4)0.2:0.01Eu3+,0.005Tb3+Li is weighed respectively2CO3(A.R.)
0.05mol、Y2O3(A.R.)0.04925mol、WO3(A.R.)0.18mol、MoO3(A.R.)0.02mol、Eu2O3(A.R.)
0.0005mol and Tb2O3(A.R.) 0.00025mol, then above medicine gross mass 1.0wt% H is weighed respectively3BO3；It will weigh
Ball grinder is added after good raw material mixing, by ratio of grinding media to material 2：1 adds abrading-ball, then adds appropriate absolute ethyl alcohol at room temperature
Ball milling 1h, by the material after ball milling together with washing lotion suction filtration, washing after drying, is calcined, calcining heat is 1000 in resistance furnace
DEG C, calcination time is 4h, and target product is produced after grinding of coming out of the stove.
Embodiment 2
According to molecular formula NaGd0.97(WO4)1.6(MoO4)0.4:0.02Eu3+,0.01Bi3+Na is weighed respectively2CO3(A.R.)
0.05mol、Gd2O3(A.R.)0.0485mol、WO3(A.R.)0.16mol、MoO3(A.R.)0.04mol、Eu2O3(A.R.)
0.001mol and Bi2O3(A.R.) 0.0005mol, then above medicine gross mass 1.0wt% BaF is weighed respectively2；It will weigh
Raw material mixing after add ball grinder, by ratio of grinding media to material 2：1 adds abrading-ball, then adds appropriate absolute ethyl alcohol ball at room temperature
3h is ground, by the material after ball milling together with washing lotion suction filtration, washing after drying, is calcined in resistance furnace, and calcining heat is 1200 DEG C,
Calcination time is 2h, and target product is produced after grinding of coming out of the stove.
Embodiment 3
According to molecular formula KLa0.95(WO4)1.4(MoO4)0.6:0.04Eu3+,0.01Sm3+K is weighed respectively2CO3(A.R.)
0.05mol、La2O3(A.R.)0.0475mol、WO3(A.R.)0.14mol、MoO3(A.R.)0.06mol、Eu2O3(A.R.)
0.002mol and Sm2O3(A.R.) 0.0005mol, then above medicine gross mass 1.0wt% SrF is weighed respectively2；It will weigh
Raw material mixing after add ball grinder, by ratio of grinding media to material 2：1 adds abrading-ball, then adds appropriate absolute ethyl alcohol ball at room temperature
2h is ground, by the material after ball milling together with washing lotion suction filtration, washing after drying, is calcined in resistance furnace, and calcining heat is 1300 DEG C,
Calcination time is 2h, and target product is produced after grinding of coming out of the stove.
Embodiment 4
According to molecular formula KY0.92(WO4)1.2(MoO4)0.8:0.06Eu3+,0.015Tb3+,0.01Bi3+K is weighed respectively2CO3
(A.R.)0.05mol、Y2O3(A.R.)0.046mol、WO3(A.R.)0.12mol、MoO3(A.R.)0.08mol、Eu2O3(A.R.)
0.003mol、Tb2O3(A.R.) 0.00075mol and Bi2O3(A.R.) 0.0005mol, then above medicine gross mass is weighed respectively
1.5wt% H3BO3With 0.5wt% BaF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds mill
Ball, then adds appropriate absolute ethyl alcohol ball milling 3h at room temperature, by the material after ball milling together with washing lotion suction filtration, washs, and does
After dry, calcined in resistance furnace, calcining heat is 900 DEG C, and calcination time is 6h, target product is produced after grinding of coming out of the stove.
Embodiment 5
According to molecular formula LiGd0.88(WO4)(MoO4):0.08Eu3+,0.02Tb3+,0.02Bi3+Li is weighed respectively2CO3
(A.R.)0.05mol、Gd2O3(A.R.)0.044mol、WO3(A.R.)0.1mol、MoO3(A.R.)0.1mol、Eu2O3(A.R.)
0.004mol、Tb2O3(A.R.) 0.001mol and Bi2O3(A.R.) 0.001mol, then above medicine gross mass is weighed respectively
0.5wt% H3BO3With 0.5wt% BaF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds mill
Ball, then adds appropriate absolute ethyl alcohol ball milling 2h at room temperature, by the material after ball milling together with washing lotion suction filtration, washs, and does
After dry, calcined in resistance furnace, calcining heat is 900 DEG C, and calcination time is 5h, target product is produced after grinding of coming out of the stove.
Embodiment 6
According to molecular formula NaLa0.90(WO4)(MoO4):0.08Eu3+,0.01Tb3+,0.01Sm3+Na is weighed respectively2CO3
(A.R.)0.05mol、La2O3(A.R.)0.045mol、WO3(A.R.)0.1mol、MoO3(A.R.)0.1mol、Eu2O3(A.R.)
0.004mol、Tb2O3(A.R.) 0.0005mol and Sm2O3(A.R.) 0.0005mol, then above medicine gross mass is weighed respectively
1.0wt% H3BO3With 1.0wt% BaF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds mill
Ball, then adds appropriate absolute ethyl alcohol ball milling 2h at room temperature, by the material after ball milling together with washing lotion suction filtration, washs, and does
After dry, calcined in resistance furnace, calcining heat is 900 DEG C, and calcination time is 4h, target product is produced after grinding of coming out of the stove.
Embodiment 7
According to molecular formula LiLu0.89(WO4)0.8(MoO4)1.2:0.08Eu3+,0.02Sm3+,0.01Bi3+Li is weighed respectively2CO3
(A.R.)0.05mol、Lu2O3(A.R.)0.0445mol、WO3(A.R.)0.08mol、MoO3(A.R.)0.12mol、Eu2O3
(A.R.)0.004mol、Sm2O3(A.R.) 0.001mol and Bi2O3(A.R.) 0.0005mol, then to weigh above medicine respectively total
Quality 0.5wt% BaF2With 0.5wt% SrF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds
Enter abrading-ball, then add appropriate absolute ethyl alcohol ball milling 2h at room temperature, by the material after ball milling together with washing lotion suction filtration, wash
Wash, after drying, calcined in resistance furnace, calcining heat is 1100 DEG C, and calcination time is 2h, target production is produced after grinding of coming out of the stove
Thing.
Embodiment 8
According to molecular formula KGd0.875(WO4)0.6(MoO4)1.4:0.1Eu3+,0.02Tb3+,0.005Bi3+K is weighed respectively2CO3
(A.R.)0.05mol、Gd2O3(A.R.)0.04375mol、WO3(A.R.)0.06mol、MoO3(A.R.)0.14mol、Eu2O3
(A.R.)0.005mol、Tb2O3(A.R.) 0.005mol and Bi2O3(A.R.) 0.00025mol, then to weigh above medicine respectively total
Quality 0.8wt% H3BO3With 0.2wt% SrF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds
Enter abrading-ball, then add appropriate absolute ethyl alcohol ball milling 1h at room temperature, by the material after ball milling together with washing lotion suction filtration, wash
Wash, after drying, calcined in resistance furnace, calcining heat is 1000 DEG C, and calcination time is 3h, target production is produced after grinding of coming out of the stove
Thing.
Embodiment 9
According to molecular formula NaY0.87(WO4)0.4(MoO4)1.6:0.08Eu3+,0.03Tb3+,0.02Bi3+Na is weighed respectively2CO3
(A.R.)0.05mol、Y2O3(A.R.)0.0435mol、WO3(A.R.)0.04mol、MoO3(A.R.)0.16mol、Eu2O3
(A.R.)0.004mol、Tb2O3(A.R.) 0.0015mol and Bi2O3(A.R.) 0.001mol, then to weigh above medicine respectively total
Quality 1.0wt% H3BO3With 0.5wt% BaF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds
Enter abrading-ball, then add appropriate absolute ethyl alcohol ball milling 3h at room temperature, by the material after ball milling together with washing lotion suction filtration, wash
Wash, after drying, calcined in resistance furnace, calcining heat is 900 DEG C, and calcination time is 4h, target product is produced after grinding of coming out of the stove.
Embodiment 10
According to molecular formula LiGd0.85(WO4)0.2(MoO4)1.8:0.08Eu3+,0.05Tb3+,0.02Bi3+Li is weighed respectively2CO3
(A.R.)0.05mol、Gd2O3(A.R.)0.0425mol、WO3(A.R.)0.02mol、MoO3(A.R.)0.18mol、Eu2O3
(A.R.)0.004mol、Tb2O3(A.R.) 0.0025mol and Bi2O3(A.R.) 0.001mol, then to weigh above medicine respectively total
Quality 1.0wt% H3BO3With 2.0wt% BaF2；Ball grinder is added after load weighted raw material is mixed, by ratio of grinding media to material 2：1 adds
Enter abrading-ball, then add appropriate absolute ethyl alcohol ball milling 3h at room temperature, by the material after ball milling together with washing lotion suction filtration, wash
Wash, after drying, calcined in resistance furnace, calcining heat is 1000 DEG C, and calcination time is 2h, target production is produced after grinding of coming out of the stove
Thing.
Claims (4)
1. the tungsten molybdate red phosphor of a kind of multi-element doping, it is characterised in that the composition of fluorescent material is ALn1-a-b
(WO4)2-x(MoO4)x:aEu3+,bRE3+, A is Li in formula, Na, at least one of K；Ln is Y, Gd, La, at least one of Lu；RE
At least one of for Bi, Sm, Tb, wherein 0<x<2；0<a<0.2；0<b<0.05.
2. fluorescent material described in claim 1, it is characterised in that：It is with Eu3+For the centre of luminescence, with alkali metal Rare-Earth Tungsten molybdate
Solid solution is matrix, adds Bi3+Deng for sensitizer, introducing and interionic reciprocation by defect in matrix structure are realized
Efficient red emission.
3. the preparation method of fluorescent material described in claim 1, it is characterised in that this method is anti-using ball milling high temperature solid-state chemistry
Answer method to prepare the tungsten molybdate red phosphor of multi-element doping, comprise the following steps that：
(1) according to molecular formula ALn1-a-b(WO4)2-x(MoO4)x:aEu3+,bRE3+, A is stoichiometrically weighed respectively2CO3、
Ln2O3、WO3、MoO3、Eu2O3And RE2O3；
(2) reaction raw materials gross mass 0.05wt%~1.0wt% fluxing agent is weighed again, and fluxing agent is H3BO3、SrF2、BaF2In
One or more；
(3) load weighted raw material and fluxing agent are moved into agate jar, add agate abrading-ball, add appropriate ball milling agent,
1~3h of ball milling at room temperature；
(4) by the material after ball milling together with washing lotion suction filtration, after drying, calcined in resistance furnace, calcining heat is 900 DEG C~1300
DEG C, calcination time is 2~6h, and target product is produced after grinding of coming out of the stove.
4. the preparation method of fluorescent material described in claim 3, it is characterised in that in step (3), ratio of grinding media to material is 2：1st, with mass parts
Than meter, ball milling agent is absolute ethyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467315.0A CN107286935B (en) | 2017-06-20 | 2017-06-20 | Multi-element doped tungsten molybdate red fluorescent powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467315.0A CN107286935B (en) | 2017-06-20 | 2017-06-20 | Multi-element doped tungsten molybdate red fluorescent powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107286935A true CN107286935A (en) | 2017-10-24 |
| CN107286935B CN107286935B (en) | 2020-06-16 |
Family
ID=60097332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710467315.0A Active CN107286935B (en) | 2017-06-20 | 2017-06-20 | Multi-element doped tungsten molybdate red fluorescent powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107286935B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109111923A (en) * | 2018-10-09 | 2019-01-01 | 贵州师范大学 | One kind can be by ultraviolet light, black light or blue light activated red fluorescence powder and preparation method thereof |
| PL423558A1 (en) * | 2017-11-24 | 2019-06-03 | Zachodniopomorski Univ Technologiczny W Szczecinie | Phases of type of restricted solid solutions doped with rare-earth metal ions and d-electron bivalent metal and method for producing new phases of type of the restricted solid solutions doped with rare-earth metal ions and d-electron bivalent metal |
-
2017
- 2017-06-20 CN CN201710467315.0A patent/CN107286935B/en active Active
Non-Patent Citations (4)
| Title |
|---|
| D. THANGARAJU ET AL.: "Novel KGd1-(x+y)EuxBiy(W1-zMozO4)2 nanocrystalline red phosphors for tricolor white LEDs", 《JOURNAL OF LUMINESCENCE》 * |
| FUWANG MO ET AL.: "Potential red-emitting NaGd(MO4)2:R (M=W, Mo, R=Eu3+, Sm3+, Bi3+) phosphors for white light emitting diodes applications", 《CERAMICS INTERNATIONAL》 * |
| PENGHUI YANG ET AL.: "Ca2Al2SiO7:Bi3+, Eu3+, Tb3+: A potential single-phased tunable-color-emitting phosphor", 《JOURNAL OF LUMINESCENCE》 * |
| QIN DAN ET AL.: "Efficient energy transfer and tunable emission in NaLa(MoO4)(WO4):Tb3+/Eu3+ phosphors", 《CERAMICS INTERNATIONAL》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL423558A1 (en) * | 2017-11-24 | 2019-06-03 | Zachodniopomorski Univ Technologiczny W Szczecinie | Phases of type of restricted solid solutions doped with rare-earth metal ions and d-electron bivalent metal and method for producing new phases of type of the restricted solid solutions doped with rare-earth metal ions and d-electron bivalent metal |
| CN109111923A (en) * | 2018-10-09 | 2019-01-01 | 贵州师范大学 | One kind can be by ultraviolet light, black light or blue light activated red fluorescence powder and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107286935B (en) | 2020-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101962542B (en) | Niobate-based red fluorescent powder for white LED as well as preparation method and application thereof | |
| CN101624521B (en) | Vanadate garnet type fluorescent material as well as preparation method and application thereof | |
| CN101475802B (en) | Multiple antimonate luminescent materials for white light LED and preparation thereof | |
| CN101402857B (en) | Red luminous material for LED and producing process thereof | |
| CN102643644A (en) | Light emitting diode (LED) fluorescent powder with single matrix white light excited by near ultraviolet and preparation method thereof | |
| CN105331364A (en) | YAG:Mn red phosphor, preparation method and applications thereof | |
| CN102585831B (en) | Europium-ion-excited fluoromolybdate red fluorescent powder and preparation method and application thereof | |
| CN105349147A (en) | Ultraviolet-to-blue light excited phosphate-based red fluorescent powder and preparation method thereof | |
| CN103305216B (en) | Borate red fluorescent powder and preparation method and application thereof | |
| CN103031125A (en) | Niobate or tantalite fluorescent material for white LED (Light-Emitting Diode), and preparation method of niobate or tantalite fluorescent material | |
| CN102604633B (en) | A kind of four tungstate red fluorescent powders and preparation method thereof | |
| CN101054521A (en) | Red luminescence phosphor | |
| CN109181697A (en) | A kind of niobates fluorescent powder of strong red emission and preparation method thereof | |
| CN107286935A (en) | A kind of tungsten molybdate red phosphor of multi-element doping | |
| US8591768B2 (en) | Germanate luminescence material and its preparation | |
| CN103468251B (en) | A kind of LED silicate green fluorescent powder and preparation method thereof | |
| CN102838989B (en) | Ultraviolet excited borate-based white fluorescent powder and preparation method thereof | |
| CN102051172A (en) | Red fluorescent powder used for LED (light-emitting diode) and preparation method thereof | |
| CN101781555A (en) | Deep red phosphor powder suitable to be excited by blue LED, preparation method thereof, and electric light source made by same | |
| CN107163941A (en) | A kind of alkaline-earth metal tungsten molybdate red phosphor and preparation method thereof | |
| CN108276998B (en) | Trivalent samarium ion doped barium gadolinium titanate red fluorescent powder and preparation method thereof | |
| CN103740367B (en) | Single-matrix white fluorescent powder for warm white LED (Light Emitting Diode) and preparation method thereof | |
| CN102936495A (en) | Synthetic method of silicate orange red fluorescent powder for white light light-emitting diode (LED) | |
| CN102492422A (en) | Green emitting phosphor for white-light LEDs and preparation method thereof | |
| Yin et al. | Realization of high-quality white light emission in single-phased α-Sr2P2O7: Dy3+, Tm3+ phosphor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |