CN102031115A - Fluorescent powder for white light and backlight LED and preparation method thereof - Google Patents
Fluorescent powder for white light and backlight LED and preparation method thereof Download PDFInfo
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- CN102031115A CN102031115A CN2010106021253A CN201010602125A CN102031115A CN 102031115 A CN102031115 A CN 102031115A CN 2010106021253 A CN2010106021253 A CN 2010106021253A CN 201010602125 A CN201010602125 A CN 201010602125A CN 102031115 A CN102031115 A CN 102031115A
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- fluorescent material
- white light
- backlight led
- led
- preparation
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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
Abstract
The invention discloses fluorescent powder for a white light and backlight light-emitting diode (LED). A structural formula of the fluorescent powder is (Y1-x-yCexRy)3(Al1-zBz)5O12-mXm, wherein R is one or more of rare-earth elements, namely La, Pr, Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Lu and Sc; B is one or more of B, Al, Ga, In, Si, Mg, Sr, Ca and Ba; X is one or more of oxygen family elements or halogens; and x+y is more than or equal to 0.0001 and less than or equal to 1, z is more than or equal to 0.001 and less than or equal to 1, and m is more than or equal to 0.001 and less than or equal to 12. The emission wavelength of the fluorescent powder is changed by a cosolvent method, and is continuously controllable between 515 and 585 nanometers.
Description
Technical field
The present invention relates to LED fluorescent material and preparation method thereof.Be specifically related to a kind of white light and backlight LED fluorescent material and preparation method thereof.
Background technology
Photodiode is the novel luminescent device of a class, and it has the luminous efficiency height, response fast, stable performance, the life-span is long, operating voltage is low, environmental protection and energy saving, plurality of advantages such as shock resistance, be acknowledged as the 4th generation light source.At general lighting, pilot lamp, display screen, the application of aspects such as road traffic launches on a large scale.
At present, the method for realization white light LEDs normally applies fluorescent material on blue-ray LED.Fluorescent material absorbs the thick gold-tinted of launching of blue light, forms white light with remaining blue light.Reported (YGd) such as United States Patent (USP) 5998925
3(Al, Ga)
5O
12, this luminescent material has the luminous efficiency height, and advantages such as stable chemical performance are widely used in present LED encapsulation field.But because gold-tinted lacks the spectrum of red composition, so the white light color developing after the encapsulation is lower, colour temperature is very high, can not satisfy the needs of normal lighting.Perhaps use to be excited by blue-ray LED and launch the fluorescent material of green glow and ruddiness, ruddiness, green glow and blue light form white light.United States Patent (USP) 6294800 has been reported at blue-ray LED and has been excited a kind of green emitting phosphor of energy transmitting green light: Ca down
8Mg (SiO
4)
4Cl
2: EuMn.Its emission main peak is in 540 nanometers, but its chemical stability is good inadequately, and luminous intensity can not meet the demands.So stable chemical performance, the green emitting phosphor that luminous efficiency is high is a problem demanding prompt solution.
Summary of the invention
The object of the present invention is to provide a kind of white light and backlight LED fluorescent material and preparation method thereof.Technical problem to be solved is described fluorescent material stable chemical performance, luminous efficiency height.
Another technical problem to be solved by this invention provides a kind of method of making this fluorescent material, and manufacture method is simple and easy, and easy handling is pollution-free, and cost is low.
Technical scheme of the present invention is as follows:
A kind of white light and backlight LED fluorescent material is characterized in that the structural formula of this fluorescent material is
(Y
1-x-yCe
xR
y)
3(Al
1-zB
z)
5O
12-mX
m，
Wherein, R is La in the rare earth element, Pr, and Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Lu, one or more among the Sc, as R when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
B is B, Al, and Ga, In, Si, Mg, Sr, Ca, one or more among the Ba, as B when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
X is one or more in oxygen family element or the halogen, and as X when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
0.0001≤x+y≤1，0.001≤z≤1，0.001≤m≤12。
Described white light and the backlight LED preparation method of fluorescent material, it is characterized in that: be placed in the crucible after by proportioning raw material and solubility promoter being mixed, react in reducing atmosphere or in the rare gas element, calcination temperature is between 1350-1700 ℃, calcination time is 2-10 hour, cooling, through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain white light and backlight LED fluorescent material that LED excites.
The raw material that is adopted is the oxide compound of corresponding metal in the structural formula or the salt that oxyhydroxide maybe can produce corresponding oxide.
Described solubility promoter is boric acid or borate, one or more in basic metal or the alkaline earth metal halide, or in the ammonium halide one or more.The amount of solubility promoter is the 0.01%--10% of raw material gross weight.Fluorescent material excites down at blue-ray LED, changes emission wavelength from 515 to 585 nanometers.
Prepared fluorescent material is coated on the LED, obtains white light, makes various devices.
Prepared fluorescent material is coated on the backlight LED, makes various devices.
Advantage of the present invention:
(1), adopt flux method to change the emission wavelength of fluorescent material, continuous controllable all from 515 nanometers to 585 nanometers.
(2), adopt flux method, reduced temperature of reaction, save energy.
(3), replace the method for Al, the present invention uses flux method, greatly reduces cost with adopting Gd etc.
Description of drawings
Fig. 1 is the emmission spectrum figure of embodiment one.
Fig. 2 is the scanning electronic microscope shape appearance figure of embodiment one.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples.
Embodiment one
By above-mentioned molecular formula, take by weighing 1.5 moles Y
2O
3, 0.4 mole Lu
2O
3, 0.1 mole CeO
2, 0.01 mole CaF
2, uniform mixing.Mixed raw material is placed in the crucible, reacts in nitrogen hydrogen mixeding gas, and calcination temperature is at 1350 degrees centigrade, and calcination time is 5 hours, cooling, and through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain described fluorescent material.Emmission spectrum figure such as Fig. 1 of prepared fluorescent material, scanning electronic microscope pattern such as Fig. 2.
Embodiment two
By above-mentioned molecular formula, take by weighing 1.0 moles Y
2O
3, 0.95 mole Lu
2O
3, 0.05 mole CeO
2, 0.01 mole SrF
2, uniform mixing.Mixed raw material is placed in the crucible, reacts in nitrogen hydrogen mixeding gas, and calcination temperature is at 1350 degrees centigrade, and calcination time is 5 hours, cooling, through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain a kind of blue-light excited white light and backlight LED fluorescent material.Obtain described fluorescent material.
Embodiment three
By above-mentioned molecular formula, take by weighing 0.5 mole Y
2O
3, 1.40 moles Lu
2O
3, 0.05 mole CeO
2, 0.01 mole BaF
2, uniform mixing.Mixed raw material is placed in the crucible, reacts in nitrogen hydrogen mixeding gas, and calcination temperature is at 1350 degrees centigrade, and calcination time is 5 hours, cooling, and through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain described fluorescent material.
Embodiment four
By above-mentioned molecular formula, take by weighing 2.90 moles Lu
2O
3, 0.1 mole CeO
2, 0.01 mole BaCl
2, uniform mixing.Mixed raw material is placed in the crucible, reacts in nitrogen hydrogen mixeding gas, and calcination temperature is at 1350 degrees centigrade, and calcination time is 5 hours, cooling, and through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain described fluorescent material.
Embodiment five
By above-mentioned molecular formula, take by weighing 2.60 moles Lu
2O
3, 0.1 mole CeO
2, 0.3 mole Gd
2O
3, 0.01 mole CaF
2, uniform mixing.Mixed raw material is placed in the crucible, reacts in nitrogen hydrogen mixeding gas, and calcination temperature is at 1350 degrees centigrade, and calcination time is 5 hours, cooling, and through broken, ball milling, washing, 200 eye mesh screens are crossed in oven dry, obtain described fluorescent material.
Claims (8)
1. white light and backlight LED fluorescent material is characterized in that the structural formula of this fluorescent material is
(Y
1-x-yCe
xR
y)
3(Al
1-zB
z)
5O
12-mX
m，
Wherein, R is La in the rare earth element, Pr, and Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Lu, one or more among the Sc, as R when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
B is B, Al, and Ga, In, Si, Mg, Sr, Ca, one or more among the Ba, as B when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
X is one or more in oxygen family element or the halogen, and as X when being two or more, each ion is replaced by of equal value, and its molfraction is constant;
0.0001≤x+y≤1，0.001≤z≤1，0.001≤m≤12。
2. white light as claimed in claim 1 and the backlight LED preparation method of fluorescent material is characterized in that:
Be placed in the crucible after by proportioning raw material and solubility promoter being mixed, in reducing atmosphere or in the rare gas element, react, calcination temperature is between 1350-1700 ℃, and calcination time is 2-10 hour, cooling, through broken, ball milling, washing, oven dry, cross 200 eye mesh screens, obtain white light and backlight LED fluorescent material that LED excites.
3. white light as claimed in claim 2 and the backlight LED preparation method of fluorescent material, it is characterized in that: the raw material that is adopted is the oxide compound of corresponding metal in the structural formula or the salt that oxyhydroxide maybe can produce corresponding oxide.
4. white light as claimed in claim 2 and backlight LED are with the preparation method of fluorescent material, and it is characterized in that: described solubility promoter is boric acid or borate, one or more in basic metal or the alkaline earth metal halide, or in the ammonium halide one or more.
5. white light as claimed in claim 4 and the backlight LED preparation method of fluorescent material, it is characterized in that: the amount of solubility promoter is the 0.01%--10% of raw material gross weight.
6. white light as claimed in claim 2 and the backlight LED preparation method of fluorescent material is characterized in that: fluorescent material excites down at blue-ray LED, changes emission wavelength from 515 to 585 nanometers.
7. according to claim 2 or 3 or 4 or 5 or 6 prepared fluorescent material, be coated on the LED, obtain white light, make various devices.
8. according to claim 2 or 3 or 4 or 5 or 6 prepared fluorescent material, be coated on the backlight LED, make various devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106021253A CN102031115A (en) | 2010-12-23 | 2010-12-23 | Fluorescent powder for white light and backlight LED and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106021253A CN102031115A (en) | 2010-12-23 | 2010-12-23 | Fluorescent powder for white light and backlight LED and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102031115A true CN102031115A (en) | 2011-04-27 |
Family
ID=43884584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880529A (en) * | 2009-05-08 | 2010-11-10 | 常耀辉 | Wavelength conversion fluorescent material for halogen co-activated gallium aluminate white LED |
-
2010
- 2010-12-23 CN CN2010106021253A patent/CN102031115A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880529A (en) * | 2009-05-08 | 2010-11-10 | 常耀辉 | Wavelength conversion fluorescent material for halogen co-activated gallium aluminate white LED |
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Application publication date: 20110427 |