CN102295928A - Red phosphor based on near ultraviolet light excitation, preparation method and application thereof - Google Patents

Red phosphor based on near ultraviolet light excitation, preparation method and application thereof Download PDF

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CN102295928A
CN102295928A CN201110180708A CN201110180708A CN102295928A CN 102295928 A CN102295928 A CN 102295928A CN 201110180708 A CN201110180708 A CN 201110180708A CN 201110180708 A CN201110180708 A CN 201110180708A CN 102295928 A CN102295928 A CN 102295928A
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red fluorescence
fluorescence powder
gram
preparation
near ultraviolet
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CN102295928B (en
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张霞
张家骅
郝振东
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Changchun Institute of Optics Fine Mechanics and Physics of CAS
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Abstract

The invention relates to red phosphor based on near ultraviolet light excitation, a preparation method and an application thereof, and belongs to the technical field of luminescence. The red phosphor has the following chemical formula: B3-m-nAl2O5Cl2:Eu<2+>m,R3<+>n, wherein B is one or two selected from Sr or Ba, R is one selected from Dy, Nd, Tm, Yb, Ho or Er, m and n are the mole fractions, the m is more than or equal to 0.03 and less than or equal to 0.30, the n is more than or equal to 0.001 and less than or equal to 0.08. The effective excitation of the red phosphor provided by the present invention is in excitation spectra range of 300-420 nm. The emission spectrum is the broadband with a main peak at 600 nm. The red phosphor provided by the present invention has characteristics of low cost of the raw materials, no pollution, simple preparation method and easy operation.

Description

A kind of red fluorescence powder based near ultraviolet excitation and its production and application
Technical field
The invention belongs to the luminescence technology field, be specifically related to a kind of red fluorescence powder based near ultraviolet excitation and its production and application.
Background technology
White light LEDs is a kind of environmental protection, energy-conservation green illumination light source, compare with traditional incandescent light, luminescent lamp, that White-light LED illumination has is energy-efficient, the life-span long, do not have advantages such as (Hg, Pb) pollutes, operating voltage is low, not fragile, rely on these advantages, white light LEDs becomes the new lover of lighting field.
Realize that white light LEDs has several different methods, blue-light LED chip/fluorescent material wherein, purple LED chip/phosphor combination is the important channel of realizing white light LEDs, is the emphasis and the main flow of semiconductor lighting industrialization.At present, white light LEDs practical on the market is the rear-earth-doped YAG:Ce gold-tinted fluorescent material of blue light tube core excitation, because the blue light of LED is participated in the synthetic of white light directly, so the glow color of device changes with the coat-thickness and the driving voltage of fluorescent material, although the light conversion efficiency of YAG:Ce gold-tinted fluorescent material is very high, but 535nm is shorter because of emission wavelength, and the white light LEDs colour rendering index that obtains is on the low side.Therefore, adopt near ultraviolet (370-410nm) tube core and can be realized that white light LEDs becomes the focus of research and development by the combination of the red, green, blue three primary colors fluorescent powder of near ultraviolet excitation, because of human eye insensitive to near-ultraviolet light, this method realizes that the color of white light LEDs is only determined by three primary colors fluorescent powder, so color stable, reproduction power is strong, and the colour rendering index height is the direction of white light LEDs development.But the red fluorescence powder that can effectively be excited by 370～410nm wavelength seldom, and after particularly comprehensive its physical chemistry, luminous efficiency, the thermostability, the red fluorescence powder that can be used for the near ultraviolet white light LEDs just lacks more.
Some present white light LEDs red fluorescence materials are as Ca 4 (1-x)O (PO4) 2: xEu 2+(application number is 200610131687.8 Chinese patent); (A xM 1-x-y-zBi yEu z) MoO 4(application number is 200610131685.9 Chinese patent); Launching efficiency in 370～410nm shortwave is on the low side.The Sr of people such as Jong Su Kim development 3MgSi 2O 8: Eu 2+, Mn 2+Single-phase white-emitting phosphor (Appl.Phys.Lett. Applied Physics wall bulletin, 85 volume (17) phases, 3696 pages, 2004), the red composition luminous efficiency that constitutes white light is also relatively low.The Sr of development such as Japanese Xianqing Piao 2Si 5N 8: Eu (Appl.Phys.Lett. Applied Physics wall bulletin, 88 volumes, 161908 pages, 2006), this fluorescent material stable performance, luminous efficiency height, but preparation condition harshness, need high-temperature and high-pressure conditions synthetic, used metal nitride materials is difficult for depositing in air, and preparation is difficult, cost is high.
Summary of the invention
The purpose of this invention is to provide a kind of red fluorescence powder based near ultraviolet excitation and its production and application, this fluorescent material is under 300～420nm ultraviolet excitation, one broadband red emission is arranged at the 600nm place, can mate, be used to prepare white light LEDs with the near ultraviolet tube core.
The present invention is based on the red fluorescence powder of near ultraviolet excitation, its chemical formula is: B 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ n, wherein, B is one or both among Sr or the Ba; R is a kind of among Dy, Nd, Tm, Yb, Ho or the Er; M, n are molar fraction, the span of m, n: 0.03≤m≤0.30,0.001≤n≤0.08.
Rare earth ion Eu 2+The d electronic energy level structure be subjected to matrix and lattice site environmental influence very big, at fluorescent material B 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ nIn, when the composition of matrix or activator, molar fraction not simultaneously, the relative intensity of its excitation spectrum in 300～420nm can change.Simultaneously, emmission spectrum can be tuning in 580～600nm scope.Therefore, by adjusting substrate composition, activator concentration, just can regulate and control Eu 2+At B 3-m-nAl 2O 5Cl 2: Eu 2+ m, R nIn the case that occupies distribute and then regulation and control Eu 2+Different excite, emmission spectrum distributes.The present invention has provided the red fluorescence powder B based on ultraviolet excitation 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ nCompositing range, in this scope, fluorescent material of the present invention can be launched peak value under 300～420nm ultraviolet excitation be 600nm, halfwidth is the ruddiness of 127nm.Because its red emission band is very wide, so only can obtain the white light LEDs of high color rendering index (CRI) with this one-component fluorescent material and near ultraviolet chips incorporate.For example, choosing B is Sr and Ba, and R is Yb, m=0.13, and during n=0.02, the fluorescent material Sr of preparation 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02, the white light LEDs with 405nm near ultraviolet chip portfolio obtains at I=20mA, records under the V=3v condition, and its colour rendering index is 81.5, and luminous efficiency is 15.21m/w, colour temperature 2900K, chromaticity coordinates (x, y)=(0.3900,0.3003).
The white light LEDs that a kind of near ultraviolet tube core of the present invention excites is with fluorescent material B of the present invention 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ nBe raw material, select for use water white transparency Resins, epoxy to do medium, press fluorescent material: medium=(25～40): 100 quality is coated in baking-curing on the near ultraviolet GaN chip than furnishing slurry, solidifies with the Resins, epoxy embedding to form.
The preparation method of red fluorescence powder of the present invention comprises the steps:
A, according to the stoichiometric ratio of each material in the fluorescent material chemical formula, take by weighing the oxide compound that contains Eu, Al and R respectively, contain B oxide compound, carbonate, nitrate, halid one or more, as raw material, and in agate mortar abundant ground and mixed, obtain mixture of above material;
B, the compound that step a is obtained are put into corundum crucible, and pre-burning is 2～4 hours in 700 ℃～800 ℃ High Temperature Furnaces Heating Apparatuss, treat naturally cooling after remix grind;
C, the pre-imitation frosted glass after step b ground are put in the corundum crucible and add a cover, at CO or H 2Roast under the reducing atmosphere, roast temperature are 1200 ℃～1400 ℃, and the roast time is 3～5 hours, behind the naturally cooling, take out grinding and promptly get red fluorescence powder.
Because SrCl 2.6H 2The fusing point of O (873 ℃) is lower, and volatile when roast, it is big to cause the Cl loss, and makes fluorescent material produce non-B 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ nPhase, so SrCl in the described mixing raw material of step a 2.6H 2The proportional quantity of O causes Cl metering than reduce because of volatilization to compensate it for pressing the chemical formula metering than 110～120% of calculated amount in roast.
The invention has the beneficial effects as follows: this red fluorescence powder excitation spectrum excites in 300～420nm scope effectively, and emmission spectrum is the broadband of main peak at 600nm; Employed raw materials cost is low, pollution-free, and the preparation method is simple, easy handling.
Description of drawings
Fig. 1 is the emmission spectrum that the present invention is based on the red fluorescence powder of near ultraviolet excitation.
Fig. 2 is the excitation spectrum that the present invention is based on the red fluorescence powder of near ultraviolet excitation.
Fig. 3 the present invention is based on the red fluorescence powder of near ultraviolet excitation and the emission spectrogram of the white light LEDs that 405nm near ultraviolet GaN chip portfolio obtains.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
The present invention adopts the oxide compound of the pure Eu of containing of top grade, Al and R, and the pure or analytical pure of top grade contains the oxide compound, carbonate, nitrate, halogenide of B as raw material, the fluorescent material of preparation various embodiments of the present invention.
Embodiment 1
Preparation consists of Sr 2.969Al 2O 5Cl 2: Eu 2+ 0.03, Yb 3+ 0.001Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.3058 gram, SrCl 2.6H 2O 1.5997 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 20%), Al 2O 30.5098 gram, Eu 2O 30.0264 gram, Yb 2O 30.0010 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.969Al 2O 5Cl 2: Eu 2+ 0.03, Yb 3+ 0.001
Embodiment 2
Preparation consists of Sr 2.869Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.03, Yb 3+ 0.001Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.3058 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987 gram, Al 2O 30.5098 gram, Eu 2O 30.0264 gram, Yb 2O 30.0010 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.869Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.03, Yb 3+ 0.001
Embodiment 3
Preparation consists of Sr 2.85Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2918 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Yb 2O 30.0197 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.85Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02
Embodiment 4
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Dy 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Dy 2O 30.0187 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Dy 3+ 0.02
Embodiment 5
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Nd 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Nd 2O 30.0168 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Nd 3+ 0.02
Embodiment 6
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Tm 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Tm 2O 30.0193 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Tm 3+ 0.02
Embodiment 7
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Yb 2O 30.0197 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02
The above-mentioned red fluorescence powder Sr that makes 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.02Emmission spectrum, excitation spectrum with and the spectrogram of the white light LEDs that obtains with 405nm near ultraviolet GaN chips incorporate see Fig. 1, Fig. 2 and Fig. 3 respectively.Wherein, Fig. 1 is the emmission spectrum under 400nm excites, and this emmission spectrum shows that main peak is at 600nm, and halfwidth is 127nm; Fig. 2 is the excitation spectrum of monitoring 600nm, and this excitation spectrum shows, excites in the 300～420nm scope of ultraviolet region effectively; Fig. 3 is the emission spectrogram of white light LEDs.
Embodiment 8
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Ho 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Ho 2O 30.0189 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Ho 3+ 0.02
Embodiment 9
Preparation consists of Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Er 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.2179 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Er 2O 30.0191 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.75Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Er 3+ 0.02
Embodiment 10
Preparation consists of Sr 2.69Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.08Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.1737 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), BaCO 30.0987, Al 2O 30.5098 gram, Eu 2O 30.1144 gram, Yb 2O 30.0788 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.69Ba 0.10Al 2O 5Cl 2: Eu 2+ 0.13, Yb 3+ 0.08
Embodiment 11
Preparation consists of Sr 2.68Al 2O 5Cl 2: Eu 2+ 0.30, Yb 3+ 0.02Fluorescent material.
Take by weighing SrCO by stoichiometric ratio 31.1663 gram, SrCl 2.6H 2O 1.4664 gram (because SrCl 2.6H 2O fusing point lower (873 ℃) is volatile, by calculated amount excessive 10%), Al 2O 30.5098 gram, Eu 2O 30.2640, Yb 2O 30.0197 gram, mixed grinding in agate mortar is put into corundum crucible, place in the High Temperature Furnaces Heating Apparatus, and 700～800 ℃ of pre-burnings 2～4 hours, remix grinds behind the naturally cooling.Pre-imitation frosted glass after the grinding places corundum crucible to add a cover, at CO or H 2Under the reducing atmosphere, roast is 3～5 hours under 1200～1400 ℃ of temperature, grinds behind the naturally cooling, promptly obtains red fluorescence powder Sr 2.68Al 2O 5Cl 2: Eu 2+ 0.30, Yb 3+ 0.02

Claims (4)

1. the red fluorescence powder based near ultraviolet excitation is characterized in that, the chemical formula of this fluorescent material is: B 3-m-nAl 2O 5Cl 2: Eu 2+ m, R 3+ n, wherein, B is one or both among Sr or the Ba; R is a kind of among Dy, Nd, Tm, Yb, Ho or the Er; M, n are molar fraction, the span of m, n: 0.03≤m≤0.30,0.001≤n≤0.08.
2. based on the preparation method of the described red fluorescence powder of claim 1, it is characterized in that this method comprises the steps:
A, according to the stoichiometric ratio of each material in the fluorescent material chemical formula, take by weighing the oxide compound that contains Eu, Al and R respectively, contain B oxide compound, carbonate, nitrate, halid one or more, as raw material, and in agate mortar abundant ground and mixed, obtain mixture of above material;
B, the compound that step a is obtained are put into corundum crucible, and pre-burning is 2～4 hours in 700 ℃～800 ℃ High Temperature Furnaces Heating Apparatuss, treat naturally cooling after remix grind;
C, the pre-imitation frosted glass after step b ground are put in the corundum crucible and add a cover, at CO or H 2Roast under the reducing atmosphere, roast temperature are 1200 ℃～1400 ℃, and the roast time is 3～5 hours, behind the naturally cooling, take out grinding and promptly get red fluorescence powder.
3. the preparation method of red fluorescence powder as claimed in claim 2 is characterized in that, in the raw material of described step a, halogenide is SrCl 2.6H 2O takes by weighing SrCl 2.6H 2The proportional quantity of O is for pressing the chemical formula metering than 110%～120% of calculated amount.
4. the application of the described red fluorescence powder of claim 1 in the preparation white light LEDs, be that described red fluorescence powder and Resins, epoxy are (25～40) according to mass ratio: 100 furnishing slurries, be coated on the near ultraviolet GaN chip and carry out baking-curing, make white light LEDs with the Resins, epoxy embedding at last.
CN2011101807086A 2011-06-30 2011-06-30 Red phosphor based on near ultraviolet light excitation, preparation method and application thereof Active CN102295928B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108345143A (en) * 2017-01-25 2018-07-31 群创光电股份有限公司 Show equipment
CN108997014A (en) * 2018-09-28 2018-12-14 成都东骏激光股份有限公司 A kind of high color fluorescent ceramics and the preparation method and application thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YANQIN LI ET AL.: "Design, synthesis and characterization of an orange-yellow long persistent phosphor: Sr3Al2O5Cl2:Eu2+,Tm3+", 《OPTICS EXPRESS》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108345143A (en) * 2017-01-25 2018-07-31 群创光电股份有限公司 Show equipment
CN108997014A (en) * 2018-09-28 2018-12-14 成都东骏激光股份有限公司 A kind of high color fluorescent ceramics and the preparation method and application thereof

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