CN102041003A - Fluorescent materials and white light emitting component - Google Patents

Fluorescent materials and white light emitting component Download PDF

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Publication number
CN102041003A
CN102041003A CN2010105723297A CN201010572329A CN102041003A CN 102041003 A CN102041003 A CN 102041003A CN 2010105723297 A CN2010105723297 A CN 2010105723297A CN 201010572329 A CN201010572329 A CN 201010572329A CN 102041003 A CN102041003 A CN 102041003A
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China
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fluorescent material
light
white
light emitting
moiety
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CN2010105723297A
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Chinese (zh)
Inventor
邱创弘
李怀安
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CPT Video Wujiang Co Ltd
Chunghwa Picture Tubes Ltd
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CPT Video Wujiang Co Ltd
Chunghwa Picture Tubes Ltd
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Priority to CN2010105723297A priority Critical patent/CN102041003A/en
Publication of CN102041003A publication Critical patent/CN102041003A/en
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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

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Abstract

The invention relates to fluorescent materials and a white light emitting component. The white light emitting component comprises a light-emitting diode (LED) chip, a first fluorescent material and a second fluorescent material, wherein the LED chip is arranged on a substrate and is used for emitting exciting light; the first fluorescent material is arranged on the LED chip and one component of the first fluorescent material comprises an aluminium nitrogen oxide doped with at least one of europium (Eu) and magnesium (Mn); the second fluorescent material is arranged on the LED chip; and first emissive light emitted by the first fluorescent material after absorbing the exciting light emitted by the LED chip and second emissive light emitted by the second fluorescent material after absorbing the exciting light emitted by the LED chip are mixed into white light.

Description

Fluorescent material and white-light emitting assembly
Technical field
The invention relates to a kind of fluorescent material and luminescence component, and particularly relevant for a kind of fluorescent material and the white-light emitting assembly of using this fluorescent material.
Background technology
Therefore advantages such as that photodiode has is long such as the life-span, volume is little, high shock resistance, low thermogenesis and low power consumption have been widely used in telltale or light source in family expenses and the various device.In recent years, photodiode is towards multicolour and high brightness development, so its Application Areas has extended to large-scale outdoor signboard, traffic signal light and association area.In recent years, because the luminous efficiency of photodiode constantly promotes, make white light emitting diode assembly existing trend that replaces traditional fluorescent lamp and white heat bulb gradually on Application Areass such as the backlight of the lamp source of for example scanner, LCD screen or set lights.
Known common white light emitting diode assembly mainly comprises following several types:
One, uses ruddiness, blue light and green light LED chip simultaneously, to produce white light.Because this kind white light emitting diode assembly need use a plurality of single color LED chips simultaneously, so production cost is higher and driver circuit is also comparatively complicated.
Two, with the blue LED chip yellow fluorescent powder of arranging in pairs or groups, to produce white light.The cost of manufacture of this kind white light emitting diode assembly is cheap relatively.But, common yellow fluorescent powder is a yttrium aluminium garnet fluorescent powder at present, often has the not good problem of color rendering when it is applied to the white light emitting diode assembly.
Three, with light-emitting diode chip for backlight unit arrange in pairs or groups a red fluorescence powder and a yellow-green fluorescence powder, to produce white light.In delivered in ORSAM company patent WO02/11173 number, utilize sulphide fluorescent material as the yellow-green fluorescence powder.Thus, the white light emitting diode assembly can have good color rendering.Yet sulphide fluorescent material produces reaction with airborne aqueous vapor easily, thereby stability is not good, is unfavorable for the quality of white light emitting diode assembly.
Summary of the invention
The invention provides a kind of fluorescent material, can be with different demand adjustment radiation light wavelengths.
The invention provides a kind of white-light emitting assembly, have preferable color rendering and preferable quality.
The present invention proposes a kind of fluorescent material, and it has a moiety, and above-mentioned moiety comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn).
In an embodiment of the present invention, above-mentioned aluminum ox nitride comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.Wherein, M comprises an alkaline-earth metal.
In an embodiment of the present invention, the excitation wavelength of above-mentioned moiety absorption is by 250nm to 400nm.
In an embodiment of the present invention, the radiating light wavelength that sends of above-mentioned moiety is by 420nm to 560nm.
The present invention also proposes a kind of white-light emitting assembly, comprises a light-emitting diode chip for backlight unit, one first fluorescent material and one second fluorescent material.Light-emitting diode chip for backlight unit is disposed on the substrate, and in order to send an exciting light.First fluorescent material is disposed on the light-emitting diode chip for backlight unit, and a moiety of first fluorescent material comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn).Second fluorescent material is disposed on the light-emitting diode chip for backlight unit, and wherein first fluorescent material absorbs one first radiating light that sent behind the exciting light that luminous disome chip sent and second fluorescent material and absorbs one second radiating light that is sent behind the exciting light that luminous disome chip sent and be mixed into a white light.
In an embodiment of the present invention, above-mentioned aluminum ox nitride comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.Wherein, M comprises an alkaline-earth metal.
In an embodiment of the present invention, the above-mentioned light wavelength that excites is by 250nm to 400nm.
In an embodiment of the present invention, the above-mentioned first radiation light wavelength is by 420nm to 560nm.
In an embodiment of the present invention, the above-mentioned second radiation light wavelength is by 570nm to 680nm.
In an embodiment of the present invention, above-mentioned white-light emitting assembly also comprises a packing colloid, and it is disposed on the substrate, covers the light-emitting diode chip for backlight unit and first fluorescent material and second fluorescent material and all intersperses among in the packing colloid.
Based on above-mentioned, fluorescent material of the present invention is difficult for going bad because of the influence of temperature and moisture.That is to say that fluorescent material of the present invention has preferable stability and helps to improve the quality of white-light emitting assembly.In addition, the radiating light wavelength that fluorescent material of the present invention sent can provide the light of blue-green with different demands.Therefore, fluorescent material of the present invention is applied to help to improve in the white-light emitting assembly color rendering of white-light emitting assembly.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 is the schematic flow sheet of the making fluorescent material of one embodiment of the invention.
The moiety that Fig. 2 illustrates to fluorescent material is BaAl 11O 16N:Eu 2+The time, the relation of excitation wavelength and intensity.
The moiety that Fig. 3 illustrates to fluorescent material is BaAl 11O 16N:Eu 2+The time, the relation of radiating light wavelength and intensity and the moiety of fluorescent material are BaAl 11O 16N:Mn 2+The time, the relation of excitation wavelength and intensity.
Fig. 4 illustrates in one embodiment of the invention, the distributing position of the radiating light of fluorescent material in tristimulus coordinates.
Fig. 5 illustrates the synoptic diagram into the white-light emitting assembly of one embodiment of the invention.
Fig. 6 illustrates the white-light emitting assembly into another embodiment of the present invention.
Embodiment
One embodiment of the invention proposes a kind of fluorescent material, and its moiety comprises the aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn).Particularly, aluminum ox nitride comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.In one embodiment, M can be selected from an alkaline-earth metal.
In detail, Fig. 1 is the schematic flow sheet of the making fluorescent material of one embodiment of the invention.Please refer to Fig. 1, at first carry out step 110, weigh raw material.With present embodiment, prepare the required raw material of above-mentioned fluorescent material and include, but are not limited to alkaline earth metal carbonate, aluminum oxide and aluminium nitride.In addition, the employed raw material of present embodiment also optionally include europous chloride and manganese oxide at least one.That is to say europous chloride can only be arranged in europous chloride and the manganese oxide, only manganese oxide or have europous chloride and manganese oxide to be used for preparing the fluorescent material of present embodiment simultaneously arranged.The amount that above-mentioned various raw material weighed can be according to chemical formula (M 1-m-nEu mMn n) Al 11O 16The shared ratio (for example numerical value of m and n) of each element among the N and determining.
Then, carry out step 120 with above-mentioned raw material uniform mixing.Generally speaking, the mixed uniformly method of above-mentioned raw materials is comprised be placed in above-mentioned raw material in one container and its grinding.The time of grinding can be 30 minutes or increase or reduce with the situation of reality.
Subsequently, carry out the raw material of step 130 after with the sintering uniform mixing.In the present embodiment, the agglomerating temperature can be 1400 ℃-1600 ℃.But, in other embodiments, the visual Material Characteristics of agglomerating temperature and changing to some extent.In addition, the agglomerating time for example is 6 hours to 10 hours, and certainly, the sintering required time also can be considered Material Characteristics and adjust to some extent.Above-mentioned parameter only is the usefulness that illustrates, and is not in order to limit the present invention.
What deserves to be mentioned is that present embodiment is made in the method for fluorescent material, for example is to carry out sintering step under a reducing environment.Above-mentioned raw materials promptly obtains moiety and is (M behind oversintering 1-m-nEu mMn n) Al 11O 16The fluorescent material of N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.In addition, nitrogen and oxygen are with triple-linked mode bond together in the fluorescent material, so the fluorescent material of present embodiment can possess good stability.Further, do not contain sulphur etc. in the fluorescent material of present embodiment to temperature and the comparatively responsive element of humidity.Therefore, the fluorescent material of present embodiment has preferable stability, and it is not easy to go bad because of the variation of temperature or humidity.
In addition, to illustrate the moiety for fluorescent material be BaAl to Fig. 2 11O 16N:Eu 2+The time, the excitation wavelength that fluorescent material absorbed and the relation of intensity.Please refer to Fig. 2, curve 210-270 is that the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, the excitation wavelength that fluorescent material absorbed under different europium (Eu) content and the relation of intensity.By curve 210-270 as can be known, the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, the absorbable excitation wavelength of fluorescent material is for example by 250nm to 400nm.That is to say that the fluorescent material of present embodiment can be subjected to exciting of UV-light (for example wavelength is the UV-light of 343nm) and send exciting light.
Fig. 3 illustrates the relation into wavelength and intensity.Please refer to Fig. 3, curve 310 for example is that the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, the radiating light wavelength that fluorescent material sent and the relation of intensity.At this, the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, the radiating light wavelength of fluorescent material is for example by 420nm to 490nm.By the curve 310 of Fig. 3 and Fig. 2 as can be known, the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, fluorescent material can be that the exciting light of 250nm to 400nm converts the radiating light that wavelength is 420nm to 490nm to wavelength.
In addition, curve 320 for example is that the moiety of fluorescent material is BaAl 11O 16N:Mn 2+The time, the excitation wavelength that fluorescent material absorbed and the relation of intensity.The moiety of fluorescent material is BaAl 11O 16N:Mn 2+The time, the excitation wavelength that fluorescent material absorbed is for example by 350nm to 460nm.By curve 310 and curve 320 as can be known, the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time, the radiating light that fluorescent material sent can be BaAl by moiety 11O 16N:Mn 2+Fluorescent material absorb.Therefore, when fluorescent material was doped with europium (Eu) and manganese (Mn) simultaneously, fluorescent material can have the effect of energy transformation (energy transfer).That is to say that the radiating light that fluorescent material sent can excitation fluorescent material itself and further discharged more radiating light.Therefore, the fluorescent material of present embodiment has high luminous efficiency.
In one embodiment, moiety is BaAl 11O 16N:Mn 2+Fluorescent material be excited the back sent penetrate optical wavelength for example by 490nm to 560nm.Generally speaking, via the fluorescent material that aforementioned making method made comes out, its radiating light wavelength of emitting is for example by 420nm to 560nm.
Fig. 4 illustrates in one embodiment of the invention, the distributing position of the radiating light that fluorescent material is emitted in tristimulus coordinates.Please refer to Fig. 4, in the chromaticity coordinates 400, position 410-430 is respectively the radiating light color of the fluorescent material of different moietys.Position 410 is that the moiety of fluorescent material is BaAl 11O 16N:Mn 2+The time fluorescent material the radiating light color.430 of positions are that the moiety of fluorescent material is BaAl 11O 16N:Eu 2+The time fluorescent material the radiating light color.420 of positions are fluorescent material BaAl 11O 16N:Mn 2+, Eu 2+The time fluorescent material the radiating light color.As shown in Figure 4, position 410 is dropped in the blue light range in fact, and position 430 is dropped in the green range in fact.If when fluorescent material was doped with europium (Eu) and manganese (Mn) simultaneously, the exciting light color of fluorescent material can drop between blueness-green, that is position 420.Therefore, the fluorescent material of present embodiment can be adjusted the doping composition of fluorescent material with different demands, uses the radiating light color that provides different.
Fig. 5 illustrates the synoptic diagram into the white-light emitting assembly of one embodiment of the invention.Please refer to Fig. 5, white-light emitting assembly 500 comprises a substrate 510, a light-emitting diode chip for backlight unit 520, one first fluorescent material 530 and one second fluorescent material 540.Light-emitting diode chip for backlight unit 520 is disposed on the substrate 510, and in order to send an exciting light L.First fluorescent material 520 and second fluorescent material 530 all are disposed on the light-emitting diode chip for backlight unit 510, and a moiety of first fluorescent material 510 comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn).That is to say that first fluorescent material 530 can be via the prepared fluorescent material of the described manufacture method of the foregoing description.In brief, white-light emitting assembly 500 is luminescence components of a kind of pair of fluorescent material.
In the present embodiment, the aluminum ox nitride that forms first fluorescent material 530 comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.In addition, M can be selected from alkaline-earth metal on real-valued.The wavelength of exciting light L is for example by 250nm to 400nm.Send one first radiating light E1 behind the exciting light L that the luminous disome chip 510 of first fluorescent material, 530 absorptions is sent.By previous embodiment as can be known, the wavelength of the first radiating light E1 can be by 420nm to 560nm, and it for example is blue light, indigo plant-green glow or green glow.Simultaneously, send one second radiating light E2 behind the exciting light L that the luminous disome chip 510 of second fluorescent material, 540 absorptions is sent.The wavelength of the second radiating light E2 is for example by 570nm to 680nm, and it for example is a ruddiness.Therefore, the first radiating light E1 and the second radiating light E2 can be mixed into white light W.
By aforesaid Fig. 4 as can be known, the first radiating light E1 of first fluorescent material 530 can be green partially blue light or green glow.After mixing with the second radiating light E2 (ruddiness), the first radiating light E1 can obtain the preferable white light W of fullness of shade.Therefore, white-light emitting assembly 500 has good color rendering.In addition, nitrogen in first fluorescent material 530 and oxygen are with triple-linked form bond together.And the moiety of first fluorescent material 530 is sulfur-bearing not in fact, is difficult for going bad because of the change of temperature or humidity.So the good stability of first fluorescent material 530 helps to make white-light emitting assembly 500 to have good quality and long work-ing life.
Fig. 6 illustrates the white-light emitting assembly into another embodiment of the present invention.Please refer to Fig. 6, white-light emitting assembly 600 comprises a substrate 610, a light-emitting diode chip for backlight unit 620, a packing colloid 630, one first fluorescent material 640 and one second fluorescent material 650.Light-emitting diode chip for backlight unit 620 is disposed on the substrate 610.Packing colloid 630 is disposed on the substrate 610, covers light-emitting diode chip for backlight unit 620, and first fluorescent material 640 and second fluorescent material 650 all intersperse among in the packing colloid 630.In the present embodiment, first fluorescent material 640 and second fluorescent material 650 for example are respectively first fluorescent material 530 and second fluorescent material 540 of previous embodiment.
In other words, the moiety of first fluorescent material 640 comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn), and second fluorescent material 650 for example is a red fluorescent material.By the description of previous embodiment as can be known, first fluorescent material 640 has the preferable stability and the radiating light wave spread broad of first fluorescent material 640, so white hair optical assembly 600 has ideal quality and good color rendering.
In sum, fluorescent material of the present invention is made up of adulterated aluminum ox nitride, and it has satisfactory stability.Help to improve the quality of white-light emitting assembly when therefore, fluorescent material of the present invention is applied to the white-light emitting assembly.In addition, the radiating light that fluorescent material of the present invention can send is a blue-green light, and itself and red fluorescence material collocation can obtain the white light of high color saturation.Therefore, the white-light emitting assembly uses fluorescent material of the present invention can have good color rendering.
Though the present invention with embodiment openly as above; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking aforesaid the claim person of defining.

Claims (12)

1. a fluorescent material has a moiety, it is characterized in that, this moiety comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn).
2. fluorescent material as claimed in claim 1 is characterized in that this aluminum ox nitride comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.
3. fluorescent material as claimed in claim 2 is characterized in that M comprises an alkaline-earth metal.
4. fluorescent material as claimed in claim 1 is characterized in that, the excitation wavelength that this moiety absorbs is by 250nm to 400nm.
5. fluorescent material as claimed in claim 1 is characterized in that, the radiating light wavelength that this moiety is emitted is by 420nm to 560nm.
6. a white-light emitting assembly is characterized in that, comprising:
One light-emitting diode chip for backlight unit is disposed on the substrate, and in order to send an exciting light;
One first fluorescent material is disposed on this light-emitting diode chip for backlight unit, and a moiety of this first fluorescent material comprises an aluminum ox nitride that is doped with europium (Eu) and one of them person of manganese (Mn); And
One second fluorescent material, be disposed on this light-emitting diode chip for backlight unit, wherein this first fluorescent material absorbs one first radiating light that sends behind this exciting light that this luminous disome chip sent, this second fluorescent material absorbs one second radiating light that sends behind this exciting light that this luminous disome chip sent, and this first radiating light and this second radiating light are mixed into a white light.
7. white-light emitting assembly as claimed in claim 6 is characterized in that this aluminum ox nitride comprises (M 1-m-nEu mMn n) Al 11O 16N, wherein M is a metal, 0 ≦ m ≦ 0.2, and 0 ≦ n ≦ 0.25.
8. white-light emitting assembly as claimed in claim 7 is characterized in that M comprises an alkaline-earth metal.
9. white-light emitting assembly as claimed in claim 6 is characterized in that this excites light wavelength by 250nm to 400nm.
10. white-light emitting assembly as claimed in claim 6 is characterized in that, this first radiation light wavelength is by 420nm to 560nm.
11. white-light emitting assembly as claimed in claim 6 is characterized in that, this two radiation light wavelength is by 570nm to 680nm.
12. white-light emitting assembly as claimed in claim 6 is characterized in that, also comprises a packing colloid, is disposed on this substrate, covers this light-emitting diode chip for backlight unit and this first fluorescent material and this second fluorescent material and all intersperses among in this packing colloid.
CN2010105723297A 2010-12-03 2010-12-03 Fluorescent materials and white light emitting component Pending CN102041003A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108957922A (en) * 2017-05-17 2018-12-07 深圳市光峰光电技术有限公司 Excitating light strength control system and optical projection system

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CN101892052A (en) * 2009-05-18 2010-11-24 华映视讯（吴江）有限公司 Red light luminescent material, manufacturing method thereof and white light emitting device

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CN101892052A (en) * 2009-05-18 2010-11-24 华映视讯（吴江）有限公司 Red light luminescent material, manufacturing method thereof and white light emitting device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108957922A (en) * 2017-05-17 2018-12-07 深圳市光峰光电技术有限公司 Excitating light strength control system and optical projection system
CN108957922B (en) * 2017-05-17 2020-12-18 深圳光峰科技股份有限公司 Excitation light intensity control system and projection system

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Application publication date: 20110504