CN106753346A - Nitrogen oxides fluorophor and its luminescent device - Google Patents
Nitrogen oxides fluorophor and its luminescent device Download PDFInfo
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Abstract
The present invention provides a kind of fluorophor, and comprising inorganic compound, the inorganic compound at least contains elements Si, Al, O, N and Eu, it is characterised in that the inorganic compound further containing the one or two kinds of in element B, C, and with Si5AlON7Identical crystal structure.Additionally, the present invention also provides a kind of luminescent device being made of above-mentioned fluorophor.The device can be applied in white light LED part, especially in wide colour gamut liquid crystal display LED backlight device；And with the good application effect such as luminous efficiency is high, colour gamut display gamut range is wide.
Description
Technical field
The invention belongs to field of light emitting materials, and in particular to a kind of nitrogen oxides fluorescence for white light LEDs
Body；More particularly to a kind of and Si5AlON7Crystal structure identical nitrogen oxides fluorophor and its luminescent device.
Background technology
White light LEDs have the advantages such as green, environmental protection, long-life, are obtained in illumination and display field
Extensive use.At present, white light LEDs be mainly with blue chip coordinate fluorescent material implementation based on, because
And the luminescent properties of fluorescent material are directly affected and decide illumination and the display performance of white light LED part.
In recent years, the new nitride of a class/nitrogen oxides luminescent material is developed, wherein, have
The fluorescent material that the Eu of Sialon structure is ion-activated receives much concern.For example, ion-activated with Eu
Si6-zAlzOzN8-z:XEu is (referred to as：β type sialon fluorescent powders, the ＜ x ＜ 0.5 of 0 ＜ z ＜ 4.2,0.0005) can be by
Light in ultraviolet light to the wide range of wavelengths region of blue light wavelength is excited.The wavelength of emission peak is
520-545nm, halfwidth is about 50nm or so.This β types sialon fluorescent powder has light efficiency high and narrow
Halfwidth, so as to cause it in LCD backlight source field, especially obtains in wide colour gamut field of liquid crystal display
Extensive use.For a long time, domestic and international researcher is carried out to structure and luminescent properties of this kind of fluorescent material etc.
Continue in-depth study.
Chinese patent application CN200680016345.X discloses a kind of β types Sialon ceramic phosphor, its by
Formula Si6-zAlzOzN8-zIt is shown that β types Sialon ceramics are for fertile material and solid solution Eu is used as the centre of luminescence
β types Sialon ceramics are constituted, and the composition z in the formula is 0.24~0.42, and Eu contents are 0.05 atom
%-0.25 atoms %.Fluorescent material disclosed in Chinese patent application CN200780021389.6 is β-sialon structures,
Activator is Eu ions, and the powder is by the particle diameter distribution that laser diffraction and scattering method is determined：In cumulative point
10% particle diameter (D10) it is 7-20 μm and 90% particle diameter (D90) it is 50-90 μm.Additionally, China is specially
Profit application CN201080003227.1, CN201180028320.2 and CN201180029917.9 etc. are also right
β-sialon:The aspects such as restriction, the preparation method of luminescent properties parameter of Eu fluorescent material are discussed in detail.However,
The light efficiency and halfwidth of above-mentioned β types sialon fluorescent powder still can not be satisfactory；The hair of the device made by simultaneously
Light efficiency and colour gamut display colour gamut can not meet applies needs.
The content of the invention
An object of the present invention is to provide a kind of nitrogen oxides that green glow can be sent in the case where blue light is excited
Fluorophor.The second object of the present invention is to provide the luminescent device containing the fluorophor.
To achieve these goals, inventor is to β-sialon:Eu nitrogen oxides has made intensive studies, as a result
It was found that, the hair of the solid solution capacity of Eu elements, the composition of β-sialon matrix and micro doped chemical to fluorophor
Light characteristic can be produced a very large impact.Therefore, after above-mentioned parameter control is in particular range, can be had
The nitrogen oxides fluorophor of specular removal and narrow halfwidth.
Therefore, according to the first aspect of the invention, there is provided a kind of fluorophor, comprising inorganic compound, institute
Inorganic compound is stated at least containing elements Si, Al, O, N and Eu, and the inorganic compound is further
Containing the one or two kinds of in element B, C, and with Si5AlON7Identical crystal structure.
Preferably, the composition of the inorganic compound is：Si6-zAlzOzN8-zBmCnNk:XEu, meets following
Condition：0.10≤z≤0.6,0.0001≤x≤0.1,0 ＜ k≤0.1,0≤m≤0.05,0≤n≤0.05, its
It is 0 when middle m is different with n；And with Si5AlON7Identical crystal structure.
Wherein, z preferably 0.10≤z≤0.50, most preferably further preferred 0.15≤z≤0.45,0.20≤z
≤0.40.X preferably 0.0003≤x≤0.08, more preferably further preferred 0.0005≤x≤0.05,0.001≤x
≤ 0.05, most preferably 0.001≤x≤0.02.
Preferably, 0 ＜ n≤0.02, more preferably 0 ＜ n≤0.015.
Preferably, 0 ＜ m≤0.02, more preferably 0 ＜ m≤0.015.
Preferably, the inorganic compound contains B and C, and 0 ＜ m≤0.015,0 ＜ n≤0.015 simultaneously.
Preferably, 0 ＜ k≤0.05, more preferably 0.004≤k≤0.04.
In a preferred implementation method, the composition of the inorganic compound is：
Si6-zAlzOzN8-zBmCnNk:XEu, meets following condition：0.20≤z≤0.40,0.001≤x≤0.02,0.004
≤ k≤0.04,0 ＜ n≤0.015,0 ＜ n≤0.015；And with Si5AlON7Identical crystal structure.
Preferably, the primary particle size of the inorganic compound meets following condition：30μm≤D50≤ 60 μm, and
Draw ratio is more than 2.
Preferably, the impurity content summation of Fe, Co, Ni is not more than 50ppm in the inorganic compound.
Preferably, the luminous chromaticity coordinates y of the fluorophor meets following condition：0.60≤y≤0.68, preferably
It is 0.62≤y≤0.67.
According to the second aspect of the invention, there is provided a kind of luminescent device, the luminescent device includes above-mentioned fluorescence
Body.
Brief description of the drawings
The XRD spectrum of the fluorophor of Fig. 1 embodiments 1.
The SEM figures of the fluorophor of Fig. 2 embodiments 1.
The excitation and emission spectra of the fluorophor of Fig. 3 embodiments 1.
Specific embodiment
The described purpose/of invention or scheme will be given in the form of preferred embodiment.To these implementation methods
Illustrate to be used to help the understanding of the present invention, and unrestricted other feasible implementation methods, these other feasible
Implementation method can be learnt by practice of the invention.Hereinafter, the representativeness that present invention will be described in detail with reference to the accompanying is real
Apply mode.
First, fluorophor of the invention is illustrated.
A kind of fluorophor, comprising inorganic compound, the inorganic compound at least containing elements Si, Al, O,
N and Eu, it is characterised in that the inorganic compound further contains one kind in element B, C or two
Kind, and with Si5AlON7Identical crystal structure.
In above-mentioned fluorophor, it includes inorganic compound, the inorganic compound at least containing elements Si, Al,
O, N and Eu, and further containing the one or two kinds of in element B and C, it is more importantly, above-mentioned
Inorganic compound has and Si5AlON7Identical crystal structure.Wherein, Si5AlON7Crystal structure and Si3N4
Crystal structure is identical, and PDF card numbers are：PDF#48-1615；With Si3N4Compare, Si5AlON7Simply exist
There are minor shifts (XRD tests are using Co targets) in the XRD angles of diffraction, and part diffraction peak intensity has summary
Microvariations, specific crystal structural data is as follows：
The Si of table 15AlON7X-ray diffraction result (Co targets)
In above-mentioned fluorophor, the composition of the inorganic compound is：Si6-zAlzOzN8-zBmCnNk:XEu,
Meet following condition：0.1≤z≤0.6,0.0001≤x≤0.1,0 ＜ k≤0.1,0≤m≤0.05,0≤n≤
0.05, it is 0 when wherein m is different with n；And with Si5AlON7Identical crystal structure.
In addition to containing tetra- kinds of elements of Si, Al, O, N, the inorganic compound also further contains unit
One or two kinds of element in plain B and C.The addition of a small amount of B element and/or C element is to fluorophor
Luminescent properties lifting has larger help.For example, the B element of low melting point is conducive to reinforcing to be calcined, do not improving
Sintering temperature can be reduced on the premise of luminescent material grains size and distribution, and causes that the luminescent material has height
Luminous efficiency and good temperature characterisitic.Additionally, the doping of B must be controlled in suitable scope.Cross
The B of amount can cause distortion of lattice, and the luminous efficiency to fluorophor is unfavorable on the contrary, therefore the doping of B is：0
≤m≤0.05.Additionally, C element can provide a kind of reducing atmosphere, be conducive to stabilized illumination center Eu2+'s
Valence state, prevents the Eu being reduced2+It is again converted into Eu3+, so as to damage its luminous efficiency.But when C contains
When amount exceedes certain numerical value, luminescent material can be polluted, not only influence body colour, light efficiency also declines to a great extent, therefore,
The doping of C is：0≤n≤0.05.
In nitrogen oxides fluorophor of the invention, Eu2+Element solid solution is in Si6-zAlzOzN8-zIt is ease with
Z values are in close relations, and the span of z values is：0.1≤z≤0.6.When z values are less than 0.1, due to Eu2+
The solid solution capacity of element is limited, causes the brightness of the fluorophor for obtaining relatively low.As z values are raised, in order to obtain this
Plant Si6-zAlzOzN8-z:XEu fluorophor, must just increase the SiO in raw material2And Al2O3But, above-mentioned chemical combination
Thing can form liquid phase when less than synthesis temperature, promote interparticle sintering, be unfavorable for the shape of target phase fluorophor
Into.When z values are more than 0.6, SiO2Amount and/or Al2O3Amount increases excessive, during synthesis, these
Material and the Eu as Eu raw material sources2O3Between can be formed stabilization compound so that hinder abundance Eu
It is solid-solution in fluorophor.Z preferably 0.10≤z≤0.50, further preferred 0.15≤z≤0.45, most preferably 0.15
≤z≤0.40。
For centre of luminescence Eu elements, found by many experiments, the x value spans of Eu elements
For：0.0001≤x≤0.1.When Eu content x values are less than 0.0001, the centre of luminescence in fluorophor is dissolved in
It is less, therefore luminosity is relatively low.When x values are more than 0.1, on the one hand, due to the restriction of z value range,
The amount that solid solution enters the Eu elements in fluorophor is certain, addition of excessive Eu elements, and part is caused on the contrary
Eu elements have neither part nor lot in reaction, do not enter into lattice, cause the waste of resource, and on the other hand, solid solution enters too much
Eu elements can be because of the too small generation concentration quenching effect of interionic distance, luminosity is on the contrary with the increase of Eu
And decline.X preferably 0.0003≤x≤0.08, further preferred 0.0005≤x≤0.05, most preferably 0.001≤
x≤0.05。
In one preferred embodiment, the inorganic compound only contains Elements C.Nitrogen in the present invention
In oxide phosphor, the upper limit of the content n of Elements C is 0.02.The presence of micro- C has beneficial to steady
Determine light-emitting phosphor center Eu2+Valence state, prevent from being converted into Eu3+And luminous efficiency is damaged, it is more obvious
Effect is can to form BCN compounds with element B and element N, is conducive to the lifting of luminous efficiency.But
Luminescent material can be polluted when its content n is more than 0.02, body colour is not only influenceed, light efficiency can also decline on the contrary.
More preferably：0 ＜ n≤0.005.
Another preferred embodiment in, the inorganic compound only contains element B.For example, low melting point
Element B be conducive to reinforcing be calcined, do not improve luminescent material grains size and distribution on the premise of can drop
Low sintering temperature, and cause that the luminescent material has luminous efficiency and good temperature characterisitic high.Additionally, first
The introducing of plain B is suitable, should match with the introduction volume of Elements C and element N, the element B of excess
Introducing can cause distortion of lattice, and the luminous efficiency to fluorophor is unfavorable on the contrary.Therefore the doping of element B is：
0 ＜ m≤0.02；Preferred scope is：0 ＜ m≤0.005.
Another preferred embodiment in, the inorganic compound simultaneously contain element B and C.Element B
With being collectively incorporated into for C, individually action effect can not only be played each, it is often more important that element B and C
Common addition can be with N2Formed BCN structural compounds, exist in this structural compounds B-C, B-N,
Chemical bonds, Er Feijian are all there occurs between three kinds of elements in C-N chemical bonds, i.e. BCN compounds mutually
Single compound, this simple compound is wide band gap semiconducter, can send the hair between 400-500nm
Penetrate peak.Additionally, what is more important BCN compounds have and BN identical crystal structures, and β-sialon:Eu
With Si3N4With identical crystal structure, along with BN and Si3N4Itself has identical crystal structure,
Therefore BCN compounds can carry out good solid solution with β-sialon.And, found through overtesting, BCN
After compound is mixed, Si is on the one hand enabled to6-zAlzOzN8-zCrystal structure is more consolidated, and can lift fluorescence
The stability of body；On the other hand, the emission peak between the 400-500nm for launching, can strengthen Eu2+Swash
Hair intensity, so as to lift the luminescent properties of fluorophor.In sum, the addition of BCN compounds is to fluorophor
The lifting of luminescent properties is very beneficial.But the element B and the amount of C for mixing will match each other, good to play
Good effect, but can not be too many, distortion of lattice can be caused too much, on the contrary to the luminous efficiency of fluorophor not
Profit.Preferred scope is：0 ＜ m≤0.01,0 ＜ n≤0.01.
Additionally, also containing a certain amount of O elements, B, N in BCN compounds in addition to B, C, N element
Content illustrates to have obtained the BCN compounds of rich B, N, O main sources therein apparently higher than C content
The oxygen not yet removed completely in surface adsorbed oxygen and structure.And with the rising of pyrolysis temperature, BCNization
B, N content in compound gradually increase, and C content is gradually reduced, and O content is further also with structure oxygen
Remove and be obviously reduced, be so conducive to the synthesis of high y value fluorophor.
Preferably, the 30 μm≤D of primary particle size of the inorganic compound50≤ 60 μm, and draw ratio is more than 2.
Primary particle size mentioned above, refers to by after high-temperature roasting, undressed fluorophor passes through laser particle size
The particle diameter of instrument test.If the particle diameter of the inorganic compound fluorophor is too small, is reflected and turned into by phosphor surface
Scatter light ratio will increase, i.e., by fluorophor absorb exciting light reduce, therefore its produce fluorescence intensity
Also can reduce, and then influence the performance of its luminescent device, and if the particle diameter of the inorganic compound fluorophor increased
If big, during the uses such as ligthing paraphernalia, luminescent device, there is dispersiveness variation, produce irregular colour
Problem, therefore preferably 30 μm≤D of primary particle size50≤60μm.If draw ratio is too small, crystal grain it is complete
Whole property is poor, can also influence the brightness of fluorophor, therefore preferably draw ratio is more than 2.
Preferably, the impurity content summation of Fe, Co, Ni is not more than 50ppm in the inorganic compound.
In order to obtain the fluorophor of display high brightness, comprising the impurity content in inorganic compound in the present invention
It is preferred that small as much as possible.Especially, fluorophor is suppressed because the impurity of a large amount of Fe, Co, Ni is seriously polluted
Luminous intensity, it is therefore preferred to by the control and control synthesis step of raw material impurity so that these are miscellaneous
The summation of prime element is less than 50ppm such that it is able to improve the luminous intensity of fluorophor.
Preferably, the condition of the luminous chromaticity coordinates y satisfactions of the fluorophor is：0.60≤y≤0.68.
In the fluorophor shown as white light LEDs, the chromaticity coordinates y values of green-emitting phosphor directly determine white light LEDs
The gamut range of display device, wants to obtain colour developing colour gamut (%NTSC) scope white light LED part higher,
The chromaticity coordinates of the green powder of nitrogen oxides is necessarily required to meet following condition：0.60≤y≤0.68.More preferably：0.62
≤y≤0.67。
Below, the preparation method for obtaining nitrogen oxides fluorophor of the invention is illustrated.
Raw material can be the raw material used in preparation method known in the art, such as silicon nitride (Si3N4)、
Aluminium nitride (AlN), silica (SiO2), aluminum oxide (Al2O3).Additionally, the raw material of centre of luminescence Eu
What is selected is metal, oxide, carbonate or the nitride of Eu；The raw material selection of B is simple substance B, BCl3
Or BN；The raw material of C is the C powder volatilized inside C powder, or burner hearth.
According to Si6-zAlzOzN8-z·BmCnNk:XEu (meets following condition：0.1≤z≤0.6,0.0001≤x
≤ 0.1,0 ＜ k≤0.1,0≤m≤0.05, wherein 0≤n≤0.05, m and n are chemistry 0) when different
Metering is put into BN crucibles than accurately weighing required raw material after being well mixed, and is added in high-temperature nitriding furnace
Heat is incubated 5-20h to 1850-2300 DEG C, and calcination atmosphere is N2Atmosphere, pressure is 0.5-2MPa.Heating temperature
Eu can not be made to be solid-solubilized in nitrogen oxides fluorophor when degree is less than 1850 DEG C.If heating-up temperature is higher than 2300 DEG C
When, in order to suppress the decomposition of raw material and nitrogen oxides fluorophor, it is necessary to provide nitrogen pressure very high.
The nitrogen oxides fluorophor that will synthesize is by crushing, post processing, the given size required for obtaining, i.e.,
Obtain nitrogen oxides fluorophor of the invention.
According to the second aspect of the invention, there is provided a kind of luminescent device, the luminescent device comprises at least above-mentioned
Described inorganic compound.The luminescent device, also including radiation source.Wherein radiation source can be any energy
Enough send radiation source of the peak wavelength positioned at the radiant light of below 480nm.Preferably, radiation source for it is ultraviolet,
Purple light or blue ray radiation source, in the case where they are excited, fluorophor of the invention can send efficient green glow.
Preferably, in above-mentioned luminescent device, except with formula be Si6-zAlzOzN8-z·BmCnNk:Group in xEu
Into with the green powder of the nitrogen oxides of structure outside, the fluorescence that other can also be added effectively to be excited by corresponding radiation source
Body, such as in " blue-ray LED+fluorophor of the invention " combination, it is green that addition can effectively be excited by blue light
Color fluorescent material or red fluorescence powder can form white light emitting device.Above-mentioned these white light emitting devices can be used in shining
Bright or display field, especially in wide colour gamut liquid crystal display white light LED part.
Can be used for other the luminous materials being used in mixed way with nitrogen oxides fluorophor of the present invention in above-mentioned luminescent device
Material includes, but are not limited to：β-sialon:Eu、Zn2SiO4:Mn、(La,Ca)3Si6N11:Ce、
(Y,Gd,Lu,Tb)3(Al,Ga)5O12:Ce、(Mg,Ca,Sr,Ba)2SiO4:Eu、(Ca,Sr)AlSiN3:Eu、
(Ca,Sr)2Si5N8:Eu、K2(Si,Ge,Ti)F6:Mn、K3AlF6:Mn etc..
Nitrogen oxides provided by the present invention is further illustrated below in conjunction with specific embodiment 1-21 and comparative example 1
Situations such as chromaticity coordinates of green-emitting phosphor, relative intensity and halfwidth.Meanwhile, 22-25 enters one in conjunction with the embodiments
The beneficial effect of step explanation luminescent device provided by the present invention.
As shown in table 2, what comparative example was selected is the chemical formula of nitrogen oxides green-emitting phosphor in embodiment 1-21：
Si5.6Al0.4Si0.4N7.6:0.005Eu is (in Si6-zAlzOzN8-z:Z=0.4, x=0.005 in xEu structural formulas)
Comparative example 1：According to Si5.6Al0.4Si0.4N7.6:0.002Eu is (in Si6-zAlzOzN8-z:In xEu structural formulas
Z=0.4, x=0.002) stoichiometric proportion, accurately weigh Si3N4、AlN、SiO2、Al2O3And Eu2O3, mix
Close in uniform rear loading BN crucibles, in a nitrogen atmosphere, 10h, firing pressure are calcined at a high temperature of 2000 DEG C
It is 2MPa, after furnace cooling, is washed by crushing, through watery hydrochloric acid and deionized water, at 100-120 DEG C
Drying, that is, obtain the nitrogen oxides fluorophor in comparative example 1.
Embodiment 1：Compared with the preparation method of comparative example, BCl is simply added in the feed3With C powder, obtain
The XRD of the fluorophor of embodiment 1 for obtaining as shown in Figure 1, as shown in Figure 2, be shown in SEM by excitation and emission spectra
Shown in Fig. 3.
Embodiment 2-21：The preparation method of nitrogen oxides fluorophor is with comparative example 1 in embodiment 2-21, simply
The raw material of B and C, the raw material of addition is added to be respectively in the feed：BCl3With C powder.
Method of testing：Using spectrophotometer to nitrogen oxides green-emitting phosphor in comparative example and embodiment 1-21
The test of relative luminance, peak wavelength and halfwidth is carried out, wherein setting excitation wavelength as 460nm, and is defined
The relative luminance of comparative example luminescent material is 100, and test result is shown in Table 2.
The measurement of the x-ray diffractogram of powder spectrum of Cok α lines：X is carried out with Co targets (λ=1.78892nm)
X ray diffraction.
The each element ratio and luminescent properties result of the embodiment 1-21 of table 2
The embodiment 1-21 results enumerated from table 2 are not difficult to find out that advanced luminescent material of the present invention has
Than comparative example 1, (chemical formula is：Si5.6Al0.4Si0.4N7.6:0.005Eu) luminescent material luminous intensity higher and
Narrower half-peak breadth, these are very beneficial for the lifting of luminous efficiency and colour developing colour gamut in liquid crystal display device.
Below with reference to embodiment 22-25, the inorganic compound prepared using the invention described above is further illustrated
It is used for beneficial effect during blue-light LED chip as green emitting phosphor.
Above-mentioned inorganic compound provided by the present invention can be used for blue-ray LED core as green emitting phosphor
Piece, in order to save word length, will below illustrate by taking comparative example and embodiment 1 as an example.
Embodiment 22
A kind of light-emitting device, using the nitrogen oxides green phosphor chemical combination in blue-light LED chip, comparative example
Thing and red fluorescent material K2SiF6:Mn, the weight ratio of both front and back fluorescent material is：It is green：Red=80：20,
Fluorescent material is dispersed in refractive index 1.41, in the silica gel of transmissivity 99%, by chip and light conversion film group
It is combined, liquid crystal backlight module is obtained after being welded circuit, sealed knot, its light efficiency is 98lm/W, display
Colour gamut is 89%NTSC.
Embodiment 23
A kind of light-emitting device, using the nitrogen oxides green phosphor chemical combination in blue-light LED chip, comparative example
Thing and red fluorescent material K2SiF6:Mn, the weight ratio of both front and back fluorescent material is：It is green：Red=75：25,
Fluorescent material is dispersed in refractive index 1.41, in the silica gel of transmissivity 99%, by chip and light conversion film group
It is combined, liquid crystal backlight module is obtained after being welded circuit, sealed knot, its light efficiency is 108lm/W, display
Colour gamut is 90%NTSC.
Embodiment 24
A kind of light-emitting device, using using the nitrogen oxides green nothing in blue-light LED chip, embodiment 1
Machine compound and red fluorescent material K2SiF6:Mn, the weight ratio of both front and back fluorescent material is：It is green：Red=75：
25, fluorescent material is dispersed in refractive index 1.41, in the silica gel of transmissivity 99%, chip and light are changed
Film is combined, and liquid crystal backlight module is obtained after being welded circuit, sealed knot, and its light efficiency is 105lm/W,
Display colour gamut is 95%NTSC.
Embodiment 25
A kind of light-emitting device, using using the nitrogen oxides green nothing in blue-light LED chip, embodiment 1
Machine compound and red fluorescent material K2SiF6:Mn, the weight ratio of both front and back fluorescent material is：It is green：Red=60：
40, fluorescent material is dispersed in refractive index 1.41, in the silica gel of transmissivity 99%, chip and light are changed
Film is combined, and liquid crystal backlight module is obtained after being welded circuit, sealed knot, and its light efficiency is 100lm/W,
Display colour gamut is 100%NTSC.
By comparing it can be found that compared with prior art, nitrogen oxides fluorophor of the invention has higher
Luminous intensity and narrower half-peak breadth.When in wide colour gamut liquid crystal display LED backlight device, no
Only luminous efficiency is high, and colour gamut display gamut range is wide.
The preferred embodiments of the present invention are these are only, is not intended to limit the invention, for this area
For technical staff, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention,
Any modification, equivalent substitution and improvements made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of fluorophor, comprising inorganic compound, the inorganic compound at least containing elements Si, Al, O,
N and Eu, it is characterised in that the inorganic compound further contains one kind in element B, C or two
Kind, and with Si5AlON7Identical crystal structure.
2. fluorophor according to claim 1, wherein, the composition of the inorganic compound is：
Si6-zAlzOzN8-zBmCnNk:XEu, meets following condition：0.1≤z≤0.6,0.0001≤x≤0.1,0 ＜ k
≤ 0.1,0≤m≤0.05 is 0 when 0≤n≤0.05, wherein m are different with n；And with Si5AlON7
Identical crystal structure.
3. fluorophor according to claim 2, wherein, z and x meets following condition：0.15≤z≤0.45,
0.0005 ＜ x≤0.05.
4. the fluorophor according to Claims 2 or 3, wherein, 0 ＜ n≤0.02.
5. the fluorophor according to Claims 2 or 3, wherein, 0 ＜ m≤0.02.
6. the fluorophor according to Claims 2 or 3, wherein, 0 ＜ m≤0.015,0 ＜ n≤0.015.
7. fluorophor according to claim 2, wherein, the condition that the chromaticity coordinates y of the fluorophor meets is：
0.60≤y≤0.68。
8. fluorophor according to claim 2, it is characterised in that 30 μm of the primary particle size of the inorganic compound
≤D50≤ 60 μm, and draw ratio is more than 2.
9. fluorophor according to claim 2, it is characterised in that Fe, Co, Ni in the inorganic compound
Impurity content summation be less than 50ppm.
10. a kind of luminescent device, it is characterised in that the luminescent device includes the fluorophor described in claim 1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387231A (en) * | 2018-04-17 | 2019-10-29 | 中国科学院上海硅酸盐研究所 | A kind of β-SiAlON:Eu, M fluorescent powder and preparation method thereof |
| CN113583664A (en) * | 2021-08-30 | 2021-11-02 | 陕西科技大学 | Beta-sialon (Si)5AlON7) Cyan luminescent phosphor and synthetic method and application thereof |
| WO2022209178A1 (en) * | 2021-03-31 | 2022-10-06 | デンカ株式会社 | EUROPIUM-ACTIVATED β–TYPE SIALON FLUORESCENT BODY, AND LIGHT-EMITTING DEVICE |
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