CN101067081A - Phosphor for white light LED with adjustable emitting peak and its prepn process - Google Patents

Phosphor for white light LED with adjustable emitting peak and its prepn process Download PDF

Info

Publication number
CN101067081A
CN101067081A CNA2007100090652A CN200710009065A CN101067081A CN 101067081 A CN101067081 A CN 101067081A CN A2007100090652 A CNA2007100090652 A CN A2007100090652A CN 200710009065 A CN200710009065 A CN 200710009065A CN 101067081 A CN101067081 A CN 101067081A
Authority
CN
China
Prior art keywords
white light
fluorescent material
emission peak
preparation
light leds
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
Application number
CNA2007100090652A
Other languages
Chinese (zh)
Other versions
CN101067081B (en
Inventor
熊兆贤
陈亚勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen University
Original Assignee
Xiamen University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xiamen University filed Critical Xiamen University
Priority to CN2007100090652A priority Critical patent/CN101067081B/en
Publication of CN101067081A publication Critical patent/CN101067081A/en
Application granted granted Critical
Publication of CN101067081B publication Critical patent/CN101067081B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Luminescent Compositions (AREA)

Abstract

The present invention is one kind of phosphor for white LED with adjustable emitting peak and its preparation process. The phosphor has stable chemical property and good light emitting performance, and may be excited effectively by UV ray, purple light or blue light to eliminate red light, with the other emitting peak in UV ray excitation being adjustable from red region to green region. The phosphor has the structural formula of A1-x(W1-yMoy)O4:Eux, where, A is at least one of Li, Na, K, Mg, Ca, Sr and Ba, x is 0-0.35, and y is 0-1. It is prepared with oxide or salt containing the A element, oxide or salt containing W and Mo, oxide or salt containing Eu2+ and fluxing agent H3BO3, and through mixing, heat treatment, cooling and post-treatment.

Description

A kind of white light LEDs adjustable fluorescent material of emission peak and preparation method thereof
Technical field
The present invention relates to a kind of fluorescent material, especially relate to a kind of can effectively being excited by ultraviolet, purple light or blue-ray LED and glow, and another emission peak that when burst of ultraviolel, occurs adjustable rare-earth luminescent material and preparation method thereof from ruddiness to the green glow.
Background technology
LED (Light Emitting Diode) is a kind of energy transformation device that converts electric energy to luminous energy, have that operating voltage is low, current consumption is low, stable performance, life-span length, shock resistance, advantage such as vibration resistance is strong, in light weight and luminescence response is fast, therefore (Xu Shu Rong is widely used in fields such as display device, general lighting lamp, pilot lamp and signal lamps, Su Mian was once. luminescence and luminescent material [M]. and Beijing: Chemical Industry Press, 2004).
At present, the realization of white light LEDs mainly contains two types: first type is with 3 kinds of LED combination results of red, green, blue white light; Second type is to mix with other luminescent material of LED de-excitation to form white light, can effectively be excited and the fluorescent material of the light that turns to be yellow by blue-ray LED, and blue light and yellow light mix form white light; Or coating can be by blue-light excited and fluorescent material transmitting green light and ruddiness on blue-light LED chip, and ruddiness, blue light and green glow mix and form white light; Or on purple light or ultraviolet LED chip, apply efficiently 3 kinds of fluorescent material of red, green, blue and realize white light LEDs.From present development trend, at aspects such as feasibility, practicality and commercializations, second type is better than first type, one of critical material that therefore synthetic fluorescent material with good luminous performance is the realization white light LEDs (Chinese patent 200310113506.5).
At present, the research and development of adopting gan (GaN) blue-ray LED (emission peak is 460nm) to cooperate YAG to produce the fluorescent material of white light has obtained bigger progress, though technology is quite ripe, the blue-ray LED luminous efficiency is low.The current effective efficiency of conversion of fluorescent material that can be applicable to white light LEDs is lower, can't satisfy the requirement of high performance device, especially the kind of red fluorescence powder seldom, efficient lower (Chinese patent 03149752.7).United States Patent (USP) has been reported several sulfide red fluorescent material, its fluorescence spectrum broad, but poor stability, in using, device produces the look drift, therefore, the white light LEDs of development of new becomes the focus (United States Patent, 2000, Patent No.:6252254) of domestic and international research with the fluorescent material of red-emitting.In recent years, the molybdate fluorescent material is in the ascendant as the research of white light LEDs aspect, but it is narrower that it excites with the halfwidth of emission peak, influence its application (Yunsheng Hu aspect white light LEDs, Weidong Zhuang, Hongqi Ye. " A novel red phosphorfor white light emitting diodes " [J] Journal of Alloys and Compounds 390 (2005): 226-229).
Summary of the invention
The object of the present invention is to provide a kind of chemical property stable, good luminous performance can effectively be excited by ultraviolet, purple light or blue-ray LED and glow, and when burst of ultraviolel another emission peak from ruddiness to the green glow adjustable white light LEDs with the adjustable fluorescent material of emission peak.
Another object of the present invention is to provide that a kind of method is simple, easy handling, low, the free of contamination a kind of white light LEDs of equipment cost be with the adjustable fluorescent material preparation method of emission peak.
A kind of white light LEDs of the present invention with the structural formula of the adjustable fluorescent material of emission peak is: A 1-x(W 1-yMo y) O 4: Eu x, wherein, A is Li, Na, K, Mg, Ca, Sr, at least a among the Ba; 0＜x≤0.35,0≤y≤1.
A kind of white light LEDs of the present invention is as follows with its step of preparation method of the adjustable fluorescent material of emission peak:
1) oxide compound or the salt to contain the A element contains oxide compound or the salt of W, Mo, contains Eu 2+Oxide compound or salt be raw material, and add fusing assistant H 3BO 3, mix mixture, the consumption of each raw material is pressed stoichiometric equation A 1-x(W 1-yMo y) O 4: Eu xThe mol ratio that (0＜x≤0.35,0≤y≤1) requires takes by weighing fusing assistant H 3BO 3Consumption be can get fluorescent material total mass 2%～5%;
2) mixture is heat-treated the thermal treatment postcooling under the air atmosphere in electric furnace;
3) thermal treatment, cooled product are carried out aftertreatment, the aftertreatment flow process comprises pulverizing, removal of impurities, oven dry, classification.
The oxide compound of raw material A element or salt contain oxide compound or the salt of W, Mo, contain Eu 2+Oxide compound or salt, preferably grind 〉=100 orders, grinding can be carried out in ethanol, acetone soln.
Thermal treatment temp is preferably 1000～1100 ℃, and heat treatment time is preferably 2～3h, after the thermal treatment in stove naturally cooling.
The removal of impurities process comprises at least a in pickling, alkali cleaning and the washing; Bake out temperature is 80～100 ℃; Classification process can adopt at least a in the methods such as settling process, method of sieving, hydraulic classification or air classification.
A kind of white light LEDs of the present invention has following outstanding characteristics with the adjustable fluorescent material of emission peak:
1, performance is highly stable, and through bubble, heat processing such as (below 400 ℃), the luminescent properties of fluorescent material does not change substantially;
2, effectively excited by ultraviolet, purple light or blue-ray LED and glowing, changing the x value and can realize that the luminous intensity that glows is adjustable.Change another emission peak that occurs when the y value can be implemented in burst of ultraviolel and can move to green glow (545nm), and the burst of ultraviolel wavelength region is wide, luminous intensity is high, good stability from ruddiness (597nm);
3, simple, the easy handling of preparation method, equipment cost are low, pollution-free.
4. have wide range of applications, for example: 1), be used, be coated on the blue-light LED chip, can realize novel white light LEDs with green emitting phosphor at the blue-light excited ruddiness that produces about 614nm down of 450～500nm wave band; 2) at the purple light excited ruddiness that produces about 614nm down of 360～420nm wave band, be used, be coated on the purple LED chip, can make novel white light LEDs with green emitting phosphor; 3) produce ruddiness and the adjustable light of 597～545nm wave band of about 614nm under the burst of ultraviolel of 250～320nm wave band, the fluorescent material of other type of remix produces the color LED of various colors.
Description of drawings
Fig. 1 is Ca 0.85WO 4: Eu 0.15Excitation spectrum.In Fig. 1, X-coordinate is excitation peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each excitation spectrum is respectively 260nm from left to right, 394nm, 464nm, λ Em=614nm.
Fig. 2 is Ca 0.85WO 4: Eu 0.15Emmission spectrum.In Fig. 2, X-coordinate is emission peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each emmission spectrum is distinguished 591nm, 614nm, dotted line λ from left to right Em=UV, solid line λ Em=464nm.
Fig. 3 is (Ca 0.5Mg 0.35) (W 0.8Mo 0.2) O 4: Eu 0.15Excitation spectrum.In Fig. 3, X-coordinate is excitation peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each excitation spectrum is respectively 264nm from left to right, 394nm, 464nm, λ Em=614nm.
Fig. 4 is (Ca 0.5Mg 0.35) (W 0.8Mo 0.2) O 4: Eu 0.15Emmission spectrum.In Fig. 4, X-coordinate is emission peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each emmission spectrum is distinguished 591nm, 597nm, 614nm, dotted line λ from left to right Em=UV, solid line λ Em=464nm.
Fig. 5 is (Ca 0.5Sr 0.35) (W 0.5Mo 0.5) O 4: Eu 0.15Excitation spectrum.In Fig. 5, X-coordinate is excitation peak wavelength Wavelength (am), and ordinate zou is luminous intensity Intensity (a.u.).Each excitation spectrum is respectively 293nm from left to right, 394nm, 464nm, λ Cm=614nm.
Fig. 6 is (Ca 0.5Sr 0.35) (W 0.5Mo 0.5) O 4: Eu 0.15Emmission spectrum.In Fig. 6, X-coordinate is emission peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each emmission spectrum is distinguished 598nm, 591nm, 614nm, dotted line λ from left to right Em=UV, solid line λ Em=464nm.
Fig. 7 is (Ca 0.5Ba 0.35) (W 0.2Mo 0.8) O 4: Eu 0.15Excitation spectrum.In Fig. 7, X-coordinate is excitation peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each excitation spectrum is respectively 272nm from left to right, 394nm, 614nm, λ Cm=614nm.
Fig. 8 is (Ca 0.5Ba 0.35) (W 0.2Mo 0.8) O 4: Eu 0.15Emmission spectrum.In Fig. 8, X-coordinate is emission peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each emmission spectrum is distinguished 545nm, 591nm, 614nm, dotted line λ from left to right Em=UV, solid line λ Em=464nm.
Fig. 9 is Ca 0.85MoO 4: Eu 0.15Excitation spectrum.In Fig. 9, X-coordinate is excitation peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each excitation spectrum is respectively 260nm from left to right, 394nm, 464nm, λ Cm=614nm.
Figure 10 is Ca 0.85MoO 4: Eu 0.15Emmission spectrum.In Figure 10, X-coordinate is emission peak wavelength Wavelength (nm), and ordinate zou is luminous intensity Intensity (a.u.).Each emmission spectrum is distinguished 591nm, 614nm, dotted line λ from left to right Em=UV, solid line λ Em=464nm.
Embodiment
Embodiment 1
Ca 0.85WO 4: Eu 0.15The preparation of fluorescent material, specific implementation process is as follows:
Mol ratio by above-mentioned stoichiometric equation takes by weighing CaCO 3(AR) 1.7015g, WO 3(AR) 4.6370g, Eu 2O 3(4N) 0.5282g, H 3BO 3(AR) 0.3433g.After fully grinding above-mentioned raw materials evenly, the alumina crucible of packing into, thermal treatment 3h in 1000 ℃ of air atmospheres.It is Ca that the thermal treatment product is promptly got chemical composition through pulverizing, washing removal of impurities, filtration, 90 ℃ of oven dry 0.85WO 4: Eu 0.15Red fluorescence powder.Its excitation spectrum is seen Fig. 1, and emmission spectrum is seen Fig. 2, and fluorescence data sees Table 1.By chart data as can be known, this fluorescent material can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light.
The stoichiometric equation of table 1 example 1～5 and fluorescence data thereof
Embodiment Stoichiometric equation Excitation peak wavelength/nm (EM=614nm) Emission peak wavelength/nm
(EX＝464nm) (EX＝UV)
1 Ca 0.85WO 4:Eu 0.15 464 394 260 614 614
2 (Ca 0.5Mg 0.35)(W 0.8Mo 0.2)O 4:E u 0.15 464 394 264 614 597
3 (Ca 0.5Sr 0.35)(W 0.5Mo 0.5)O 4: Eu 0.15 464 394 293 614 589
4 (Ca 0.5Ba 0.35)(W 0.2Mo 0.8)O 4: Eu 0.15 464 394 272 614 545
5 Ca 0.85MoO 4:Eu 0.15 464 394 260 614 614
Embodiment 2
(Ca 0.5Mg 0.35) (W 0.8Mo 0.2) O 4: Eu 0.15The preparation of fluorescent material, specific implementation process is as follows:
Mol ratio by above-mentioned stoichiometric equation takes by weighing CaCO 3(AR) 0.8508g, (MgCO 3) .Mg (OH) 2.5H 2O (AR) 0.6801g, (AR) WO 3(AR) 3.7096g, MoO 3(AR) 0.5758g, Eu 2O 3(4N) 0.5282g, H 3BO 3(AR) 0.3172g.After fully grinding above-mentioned raw materials evenly, the alumina crucible of packing into, thermal treatment 2.5h in 1050 ℃ of air atmospheres.It is Ca that the thermal treatment product is promptly got chemical composition through pulverizing, pickling impurity removal, filtration, 100 ℃ of oven dry 0.85(W 0.8Mo 0.2) O 4: Eu 0.15Red fluorescence powder.Its excitation spectrum is seen Fig. 3, and emmission spectrum is seen Fig. 4, and fluorescence data sees Table 1.By chart data as can be known, this fluorescent material can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light.
Embodiment 3
(Ca 0.5Sr 0.35) (W 0.5Mo 0.5) O 4: Eu 0.15The preparation of fluorescent material, specific implementation process is as follows:
Mol ratio by above-mentioned stoichiometric equation takes by weighing CaCO 3(AR) 0.8508g, SrCO 3(AR) 1.0333g, WO 3(AR) 2.3185g, MoO 3(AR) 1.4394g, Eu 2O 3(4N) 0.5282g, H 3BO 3(AR) 0.3085g.After fully grinding above-mentioned raw materials evenly, the alumina crucible of packing into, thermal treatment 2h in 1100 ℃ of air atmospheres.It is Ca that the thermal treatment product is promptly got chemical composition through pulverizing, alkali cleaning and washing removal of impurities, filtration, 80 ℃ of oven dry 0.85(W 0.5Mo 0.5) O 4: Eu 0.15Red fluorescence powder.Its excitation spectrum is seen Fig. 5, and emmission spectrum is seen Fig. 6, and fluorescence data sees Table 1.By chart data as can be known, this fluorescent material can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light.
Embodiment 4
(Ca 0.5Ba 0.35) (W 0.2Mo 0.8) O 4: Eu 0.15The preparation of fluorescent material, specific implementation process is as follows:
Mol ratio by above-mentioned stoichiometric equation takes by weighing CaCO 3(AR) 0.8508g, BaCO 3(AR) 1.3813g, WO 3(AR) 0.9274g, MoO 3(AR) 2.3030g, Eu 2O 3(4N) 0.5282g, H 3BO 3(AR) 0.2995g.After fully grinding above-mentioned raw materials evenly, the alumina crucible of packing into, thermal treatment 2.5h in 1050 ℃ of air atmospheres.It is Ca that the thermal treatment product is promptly got chemical composition through pulverizing, alkali cleaning removal of impurities, filtration, 85 ℃ of oven dry 0.85(W 0.2Mo 0.8) O 4: Eu 0.15Red fluorescence powder.Its excitation spectrum is seen Fig. 7, and emmission spectrum is seen Fig. 8, and fluorescence data sees Table 1.By chart data as can be known, this fluorescent material can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light.
Embodiment 5
Ca 0.85MoO 4: Eu 0.15The preparation of fluorescent material, specific implementation process is as follows:
Mol ratio by above-mentioned stoichiometric equation takes by weighing CaCO 3(AR) 1.7015g, MoO 3(AR) 2..8788g, Eu 2O 3(4N) 0.5282g, H 3BO 3(AR) 0.2554g.After fully grinding above-mentioned raw materials evenly, the alumina crucible of packing into, thermal treatment 3h in 1000 ℃ of air atmospheres.It is Ca that the thermal treatment product is promptly got chemical composition through pulverizing, washing and alkali cleaning removal of impurities, filtration, 95 ℃ of oven dry 0.85MoO 4: Eu 0.15Red fluorescence powder.Its excitation spectrum is seen Fig. 9, and emmission spectrum is seen Figure 10, and fluorescence data sees Table 1.By chart data as can be known, this fluorescent material can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light.
In sum, a kind of white light LEDs of the present invention has that chemical stability is good, luminous intensity is high, can effectively be excited by the ultraviolet in 250～480nm scope, purple light or blue light with the adjustable fluorescent material of emission peak, and regulates the W/Mo ratio and can realize the characteristics such as mobile of emission peak between ruddiness and green glow.The preparation method is simple, easy handling, equipment cost are low, pollution-free.

Claims (10)

1. a white light LEDs is characterized in that with the adjustable fluorescent material of emission peak its structural formula is: A 1-x(W 1-yMo y) O 4: Eu x, wherein, A is Li, Na, K, Mg, Ca, Sr, at least a among the Ba; 0＜x≤0.35,0≤y≤1.
2. a kind of white light LEDs as claimed in claim 1 preparation method of the adjustable fluorescent material of emission peak is characterized in that its step is as follows:
1) oxide compound or the salt to contain the A element contains oxide compound or the salt of W, Mo, contains Eu 2+Oxide compound or salt be raw material, and add fusing assistant H 3BO 3, mix mixture, the consumption of each raw material is pressed stoichiometric equation A 1-x(W 1-yMo y) O 4: Eu xThe mol ratio that (0＜x≤0.35,0≤y≤1) requires takes by weighing fusing assistant H 3BO 3Consumption be can get fluorescent material total mass 2%～5%;
2) mixture is heat-treated the thermal treatment postcooling under the air atmosphere in electric furnace;
3) thermal treatment, cooled product are carried out aftertreatment, the aftertreatment flow process comprises pulverizing, removal of impurities, oven dry, classification.
3. a kind of white light LEDs as claimed in claim 2 is characterized in that the oxide compound or the salt of described raw material A element with the preparation method of the adjustable fluorescent material of emission peak, contains oxide compound or the salt of W, Mo, contains Eu 2+Oxide compound or salt grind 〉=100 orders.
4. a kind of white light LEDs as claimed in claim 3 is with the preparation method of the adjustable fluorescent material of emission peak, it is characterized in that described grinding carries out in ethanol, acetone soln.
5. a kind of white light LEDs as claimed in claim 2 is characterized in that with the preparation method of the adjustable fluorescent material of emission peak described thermal treatment temp is 1000～1100 ℃.
6. a kind of white light LEDs as claimed in claim 2 is characterized in that with the preparation method of the adjustable fluorescent material of emission peak described heat treatment time is 2～3h.
7. a kind of white light LEDs as claimed in claim 2 is with the preparation method of the adjustable fluorescent material of emission peak, it is characterized in that after the described thermal treatment naturally cooling in stove.
8. a kind of white light LEDs as claimed in claim 2 is with the preparation method of the adjustable fluorescent material of emission peak, it is characterized in that described removal of impurities comprises at least a in pickling, alkali cleaning and the washing.
9. a kind of white light LEDs as claimed in claim 2 is characterized in that with the preparation method of the adjustable fluorescent material of emission peak described bake out temperature is 80～100 ℃.
10. a kind of white light LEDs as claimed in claim 2 is with the preparation method of the adjustable fluorescent material of emission peak, it is characterized in that described classification adopts at least a in settling process, method of sieving, hydraulic classification or the air classification method.
CN2007100090652A 2007-06-06 2007-06-06 Phosphor for white light LED with adjustable emitting peak and its prepn process Expired - Fee Related CN101067081B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007100090652A CN101067081B (en) 2007-06-06 2007-06-06 Phosphor for white light LED with adjustable emitting peak and its prepn process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2007100090652A CN101067081B (en) 2007-06-06 2007-06-06 Phosphor for white light LED with adjustable emitting peak and its prepn process

Publications (2)

Publication Number Publication Date
CN101067081A true CN101067081A (en) 2007-11-07
CN101067081B CN101067081B (en) 2012-11-28

Family

ID=38879782

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007100090652A Expired - Fee Related CN101067081B (en) 2007-06-06 2007-06-06 Phosphor for white light LED with adjustable emitting peak and its prepn process

Country Status (1)

Country Link
CN (1) CN101067081B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338194B (en) * 2008-05-15 2011-09-21 沈阳化工学院 Rare-earth red fluorescent material and method for preparing same
CN102367381A (en) * 2011-09-05 2012-03-07 四川师范大学 Lanthanide metal doped tungsten and molybdate phosphor composition
CN103087712A (en) * 2013-01-23 2013-05-08 重庆大学 Single matrix white phosphor and preparation method thereof
CN104610968A (en) * 2015-02-16 2015-05-13 福州大学 LED fluorescent powder and preparation method thereof
CN111607396A (en) * 2020-06-10 2020-09-01 蕉岭佰霖生物科技有限公司 Near ultraviolet broadband excited red fluorescent powder and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338194B (en) * 2008-05-15 2011-09-21 沈阳化工学院 Rare-earth red fluorescent material and method for preparing same
CN102367381A (en) * 2011-09-05 2012-03-07 四川师范大学 Lanthanide metal doped tungsten and molybdate phosphor composition
CN103087712A (en) * 2013-01-23 2013-05-08 重庆大学 Single matrix white phosphor and preparation method thereof
CN104610968A (en) * 2015-02-16 2015-05-13 福州大学 LED fluorescent powder and preparation method thereof
CN111607396A (en) * 2020-06-10 2020-09-01 蕉岭佰霖生物科技有限公司 Near ultraviolet broadband excited red fluorescent powder and preparation method thereof

Also Published As

Publication number Publication date
CN101067081B (en) 2012-11-28

Similar Documents

Publication Publication Date Title
Zhou et al. Improved luminescence and energy-transfer properties of Ca 14 Al 10 Zn 6 O 35: Ti 4+, Mn 4+ deep-red-emitting phosphors with high brightness for light-emitting diode (LED) plant-growth lighting
Guo et al. Efficient red phosphors Na5Ln (MoO4) 4: Eu3+ (Ln= La, Gd and Y) for white LEDs
EP2447338A1 (en) Borophosphate phosphor and light source
Yang et al. Luminescence investigations of Sr3SiO5: Eu2+ orange–yellow phosphor for UV-based white LED
CN1927996A (en) Fluorescent powder material, preparation method thereof and white light LED electric light source
CN101851508B (en) Europium activated silicate green fluorescent powder and application thereof in white light emitting diode
CN101029230A (en) Nitrogen oxide compound fluorescent material and illuminating or displaying light source therefrom
CN1908116A (en) Blue light-emitting phosphor and light-emitting device using the same
CN104804738B (en) Near ultraviolet excited white light LED fluorescent powder and preparation method thereof
CN101962542A (en) Niobate-based red fluorescent powder for white LED as well as preparation method and application thereof
CN102533266A (en) Europium-activated tungsten molybdate red fluorescent powder for white LED (Light Emitting Diode) and preparation method of europium-activated tungsten molybdate red fluorescent powder
KR101088996B1 (en) Silicon-containing phosphor for led, its preparation and the light emitting devices using the same
Tang et al. Photoluminescence characterization of a novel red-emitting phosphor In2 (MoO4) 3: Eu3+ for white light emitting diodes
Yeh et al. Luminescence properties of NaCaGaSi2O7: RE, Li+ (RE= Ce3+, Eu3+ or Tb3+) phosphors for UV excitable white light emitting diodes
CN101054520A (en) Red luminescence phosphor
CN101067081B (en) Phosphor for white light LED with adjustable emitting peak and its prepn process
CN102585831B (en) Europium-ion-excited fluoromolybdate red fluorescent powder and preparation method and application thereof
CN103525409A (en) A high-luminous-efficiency high-stability nitride luminescent material and a manufacture method thereof
CN103146381B (en) Aluminate red phosphor activated by manganese ion and preparation method thereof
CN101054521A (en) Red luminescence phosphor
CN1255506C (en) Boron-containing luminescent powder for LED, preparing method thereof and electric light source therefrom
CN104726097A (en) Novel yellow fluorescent powder and preparation method thereof
Zhaomei et al. Luminescent properties of red phosphors K2Ba (MoO4) 2: Eu3+ for white light emitting diodes
Bandi et al. Thermally stable blue-emitting NaSrPO4: Eu2+ phosphor for near UV white LEDs
CN102433119A (en) Tungsten molybdate red fluorescent powder for white light-emitting diode (LED) and preparation method of tungsten molybdate red fluorescent powder

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121128

Termination date: 20180606