WO2007136105A1 - 白色蛍光体および白色発光素子乃至装置 - Google Patents
白色蛍光体および白色発光素子乃至装置 Download PDFInfo
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- WO2007136105A1 WO2007136105A1 PCT/JP2007/060564 JP2007060564W WO2007136105A1 WO 2007136105 A1 WO2007136105 A1 WO 2007136105A1 JP 2007060564 W JP2007060564 W JP 2007060564W WO 2007136105 A1 WO2007136105 A1 WO 2007136105A1
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 137
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- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
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- 230000000052 comparative effect Effects 0.000 description 26
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 25
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- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229910052693 Europium Inorganic materials 0.000 description 3
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 3
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- 239000000843 powder Substances 0.000 description 3
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- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 2
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 229910052765 Lutetium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 229910052727 yttrium Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
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- SFMJNHNUOVADRW-UHFFFAOYSA-N n-[5-[9-[4-(methanesulfonamido)phenyl]-2-oxobenzo[h][1,6]naphthyridin-1-yl]-2-methylphenyl]prop-2-enamide Chemical compound C1=C(NC(=O)C=C)C(C)=CC=C1N1C(=O)C=CC2=C1C1=CC(C=3C=CC(NS(C)(=O)=O)=CC=3)=CC=C1N=C2 SFMJNHNUOVADRW-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
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- 150000002910 rare earth metals Chemical group 0.000 description 1
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- 150000003568 thioethers Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/77342—Silicates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7729—Chalcogenides
- C09K11/773—Chalcogenides with zinc or cadmium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7729—Chalcogenides
- C09K11/7731—Chalcogenides with alkaline earth metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
-
- 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
Definitions
- the present invention is a white phosphor made of a single material, and emits white light by near-ultraviolet excitation.
- the present invention relates to a white phosphor capable of emitting light, and a white light emitting element or apparatus using the same.
- the current mainstream of light sources for illumination is fluorescent lamps and incandescent bulbs, but those using LEDs (light emitting diodes) as light sources consume less power and have longer lifespans than fluorescent lamps.
- LEDs light emitting diodes
- it has safety that does not heat even when touched, and does not contain harmful substances such as mercury, so it is excellent in terms of the environment.It is expected that it will become the mainstream of light sources for lighting in the near future. It has been.
- white light can be realized only by mixing light of various colors (wavelengths).
- the color of LED light depends on the difference (band gap) when a high-energy electron falls to a low-energy position. This band gap is unique to the semiconductor crystal used in the LED chip. It is monochromatic light such as red, green, and blue, and white light cannot be obtained from only one LED.
- a combination of an LED as a light emitter and a phosphor As a method for obtaining white light using an LED, a combination of an LED as a light emitter and a phosphor, the light emitted from the LED is absorbed by the phosphor, and the phosphor absorbs the light.
- a method has been proposed in which white light is obtained by changing the wavelength of the emitted light into light having a different wavelength and by diffusing and mixing the light emitted from the LED and the light emitted from the phosphor, or only by the light emitted from the phosphor. ing.
- a white light emitting device that generates pseudo white light is known (see Patent Document 1).
- the white light emitting device having such a configuration obtains pseudo white light composed of blue and yellow as color components. For this reason, it is said that it is inferior in color rendering, that is, an object color that looks the same as when illuminated by natural light, and is unsuitable for general lighting applications.
- Patent Document 2 discloses a light emitting device comprising a blue LED, a green phosphor composition, and a red phosphor composition.
- a blue LED blue light
- a green phosphor composition and a red phosphor composition, respectively
- light of long wavelengths green light and red light
- White light is obtained by diffusing mixed color of blue light from the LED and green light and red light from the phosphor composition.
- this light-emitting device uses a plurality of phosphors (compositions), it is difficult to adjust the color due to the interaction between the phosphors. In particular, since it is difficult to prepare a composition that adjusts the content of phosphors that emit light of each color and the mixing method, there is a problem that the quality of the product varies.
- Patent Document 1 Japanese Patent No. 3503139
- Patent Document 2 Japanese Unexamined Patent Publication No. 2005-20010
- Patent Document 3 JP 2005-226069, in particular [0017] Disclosure of the Invention
- the white light emitting device disclosed in Patent Document 3 uses Eu and Mn as light emission centers (light emission ions), and Mn receives energy emitted from Eu and emits white light, so the light emission mechanism is complicated. In addition, it was inefficient and had the problem of having afterglow. In addition, in this white light emitting device, it is necessary to control the valence of Mn to be divalent (Mn 2+ ), and it is extremely difficult to control the valence of Mn to be divalent. It was not easy to do. From this point of view, it is desired to develop a white phosphor made of a single material and having a light emission center made of one element other than Mn.
- the present invention is a white phosphor made of a single material, the emission center of which is an element other than Mn, and a white phosphor capable of emitting white light having excellent color rendering properties by near-ultraviolet excitation,
- the present invention also provides a white light emitting element or device using the same.
- the white phosphor of the present invention is a white phosphor made of a single material, it is not necessary to prepare a plurality of types of phosphors, and therefore it is easy to manufacture and stably produces products with no variations. can do.
- the white phosphor of the present invention can emit white light having excellent color rendering properties by excitation of light having a wavelength of 250 nm to 480 nm.
- a near ultraviolet LED for example, 400 nm
- it does not contain harmful substances such as mercury, se, and cadmium and is consumed.
- a white light-emitting element or device with low power, long life, safety, and excellent color rendering can be formed.
- the emission center (emission ion) is only Eu2 + , the emission mechanism is not complicated and efficient, and there is no afterglow compared to the white light emitting device of Patent Document 3 above.
- the valence control of Eu is easier than that of Mn, it has the advantage that phosphors can be easily synthesized, and also has the advantage that there is little color change with increasing temperature.
- the white phosphor of the present invention and the white light emitting device or apparatus using the same can be used for display devices such as special illumination, liquid crystal backlights, EL, FED, and CRT display devices in addition to general illumination. .
- it can emit white light with excellent color rendering properties, it is particularly suitable as general illumination requiring white light close to natural light (sunlight).
- the red phosphor of the present invention may be in any form of powder or molded body.
- the “light emitting element” in the “white light emitting element or apparatus” is intended to mean a light emitting device that emits a relatively small light and includes at least a phosphor and a light emitting source as an excitation source thereof.
- the “light-emitting device” is intended to mean a light-emitting device that emits a relatively large light and includes at least a phosphor and a light-emitting source as an excitation source thereof.
- FIG. 1 is a graph showing the emission color of the phosphor obtained in the example in CIE chromaticity coordinates.
- FIG. 2 is a graph showing the relationship between the PL intensity and wavelength (excitation wavelength: 400 nm) of the phosphor obtained in Example 1-13.
- FIG. 3 is a graph showing the relationship between the PL intensity and the wavelength (excitation wavelength 4 0 0 ⁇ m) of the phosphor obtained in Example 2-19.
- FIG. 4 is a graph showing the relationship between the PL intensity and the wavelength (excitation wavelength 4 0 0 ⁇ m) of the phosphor obtained in Example 3-1.
- FIG. 5 shows the PL intensity and wavelength of the phosphor obtained in Comparative Example 4 ("mixed powder” in the figure) and the phosphor obtained in Example 1-11 ("synthetic powder” in the figure). It is the graph which showed the relationship.
- FIG. 6 shows the phosphor obtained in Comparative Example 4 (“before pulverization” in the figure), a phosphor mixed with this paint for 30 minutes (“after powdering” in the figure), and
- FIG. 6 is a graph showing the relationship between PL intensity and wavelength for a heat-treated phosphor (“anneal after powdering” in the figure).
- FIG. 7 is an electron micrograph (magnified 300 times) at the time of light emission of the phosphor obtained in Example 1-1.
- FIG. 8 is an electron micrograph (300 ⁇ ) at the time of light emission of phosphor C obtained in Comparative Example 4.
- FIG. 9 is a graph showing the color change of the phosphor obtained in Example 2-1 8 as the temperature rises.
- FIG. 10 is a graph showing the color change of the phosphor obtained in Comparative Example 5 as the temperature rises.
- ⁇ to ⁇ ( ⁇ and ⁇ are arbitrary numbers) means “X or more and ⁇ or less” unless otherwise specified, “preferably greater than X,” or It also includes the meaning of “preferably smaller than ⁇ ”.
- the white phosphor according to the first embodiment of the present invention (hereinafter referred to as “the present phosphor 1”) is (sr O) x ⁇ (MgO) y . (S iO 2 ) z : Eu 2+ This is a white phosphor represented by the composition formula: At this time, it is important that the molar ratio “X / y” between S r and Mg is 4.5 ⁇ x / y ⁇ 27.5. 4.
- the molar ratio of S i and Mg "zZyJ is, 3 ⁇ ⁇ ⁇ 14. is it is important at 5. 3 ⁇ zZy ⁇ 14. If 5 white light provided with RGB, specifically, Can obtain white light 1. From the viewpoint of obtaining desirable white light, specifically white light 2, preferably 3 ⁇ z / y ⁇ 6, particularly preferably 3.3 ⁇ z / y ⁇ 5.5 Of these, 3.5 ⁇ z / y ⁇ 5 is particularly preferable.
- the phosphor 1 is preferably a phosphor containing a phase of S r 3 Mg S i 20 8 and a phase of S r 2 S i 0 4 .
- the white phosphor according to the second embodiment of the present invention (hereinafter referred to as “the present phosphor 2”) is a white phosphor represented by a composition formula of (S r (MgO) ⁇ ⁇ (S i 0 2 ) Eu 2+ The body.
- the molar ratio “x / y” between Sr and Mg is 4.5 ⁇ x / y ⁇ 27.5. 4. If 5 ⁇ x / y ⁇ 27.5, white light with RGB, specifically white light 1, can be obtained. Desirable white light, specifically white light 2 In view of this, preferably 5 xZy ⁇ 11, particularly preferably 5.5 ⁇ x / y ⁇ 9, especially 6 ⁇ X / y ⁇ 8.
- the molar ratio of S i to Mg “zZy” is 5 is important. If 3 ⁇ zZy ⁇ 14.5, white light with RGB, specifically white light 1, can be obtained. From the viewpoint of obtaining the desired white light, specifically white light 2, preferably 3 ⁇ z / y ⁇ 6, particularly preferably 3 3 ⁇ z / y ⁇ 5.5, especially 3.5 ⁇ z / y ⁇ 5 is preferred.
- alpha indicates the concentration of S is important that a 0 ⁇ ⁇ ⁇ 0. 3. If 0 ⁇ ⁇ ⁇ 0.3, white light, specifically white light 1, can be adjusted to give a red component within the range of 1. From the viewpoint of obtaining desirable white light, specifically white light 2, it is preferably 0 ⁇ 0.10, particularly preferably 0 ⁇ 0 1 ⁇ 0.08, and especially 0.0 1 ⁇ . Preferably ⁇ 0.06.
- the phosphor 2 is preferably a phosphor containing a phase of S r 3 Mg S i 2 0 8, a phase of S r 2 S i 0 4 and a phase of S r S.
- the white phosphor according to the third embodiment of the present invention (hereinafter referred to as “the present phosphor 3”) has (S r ⁇ !. ⁇ SJ ⁇ ⁇ (Mg !. fJ Z n personally0) y ⁇ (S i 0 2 ) z : a white phosphor represented by the composition formula of E u 2+ .
- the molar ratio “x / y” between S r and M gl _Z ⁇ ⁇ is 4.5 ⁇ x / y ⁇ 27.5. 4. If 5 ⁇ x / y ⁇ 27.5, you can get white light with RGB, specifically white light 1. From the viewpoint of obtaining desirable white light, specifically white light 2, preferably 5 ⁇ x / y ⁇ 11, particularly preferably 5.5 ⁇ x / y ⁇ 9, especially 6 ⁇ xZy ⁇ 8. It is important that the molar ratio “z / y” between S i and Mg to ⁇ ⁇ is 3 ⁇ z / y ⁇ 14.5. If 3 ⁇ zZy ⁇ 14.5, white light with RGB, white light 1 can be obtained.
- white light 2 preferably 3 ⁇ z / y ⁇ 6, particularly preferably 3.3 ⁇ z / y ⁇ 5.5, especially 3.5 ⁇ z / y ⁇ 5 is preferred.
- ⁇ which indicates the concentration of S, is 0 ⁇ 0.3. If 0 ⁇ ⁇ ; ⁇ 0 ⁇ 3, white light, specifically white light 1, can be adjusted to give a red component within the range of 1. From the viewpoint of obtaining a desirable white light, specifically white light 2, it is preferably 0 ⁇ 0.1, particularly preferably 0 ⁇ 0 1 ⁇ 0.08, and especially 0.0 1 ⁇ 0 06 is preferred.
- white light specifically white light 1
- white light 2 it is preferably 0/3/3, particularly preferably 0 / 3 ⁇ 0.45, and especially 0, j3 ⁇ 0.3. Is preferred.
- This phosphor 3 has a fluorescence containing a phase of S r 3 Mg S i 2 0 8, a phase of S r 2 S i 0 4, a phase of S r S and a phase of S r 2 Z n S i 2 0 7.
- the body is preferred.
- Whether or not the phosphor is represented by the composition formula of the phosphors 1 to 3 is determined by using an X-ray fluorescence analyzer (XRF) or an ICP emission spectrometer etc. by completely dissolving the phosphor with hydrofluoric acid or the like. This can be determined by measuring the amount of each element.
- XRF X-ray fluorescence analyzer
- ICP emission spectrometer etc. by completely dissolving the phosphor with hydrofluoric acid or the like. This can be determined by measuring the amount of each element.
- any of the above present phosphors 1-3 (collectively referred to as "the invention phosphor") is, S r a S b Mg 0 Z n d S i e O f: can be represented by the composition formula of E u 2+ .
- (c + d) / (a + c + d) is 0 ⁇ (c + d) / (a + c + d) ⁇ 0.2
- a + c + d force 1. 8 ⁇ a + c + d ⁇ 2.2.
- white light 2 preferably 1. 9 ⁇ a + c + d ⁇ 2.2, particularly preferably 1. 9 ⁇ a + c + d ⁇ 2.1.
- it is preferably 0. ⁇ b / (b + f) ⁇ 0.0.05, particularly preferably 0 ⁇ b / (b + f) ⁇ 0.04, in particular 0 ⁇ bZ (b + f) ⁇ 0.03.
- b + f force 3.0 ⁇ b + f ⁇ 4.4 From the viewpoint of obtaining the desired white light, specifically white light 2, preferably 3.5 ⁇ b + f ⁇ 4.2, especially 3.8 ⁇ b + f ⁇ 4.2, especially 3.9 ⁇ b + f ⁇ 4.1.
- XRF X-ray fluorescence analyzer
- the emission center (luminescent ion) of the phosphor of the present invention is divalent Eu 2+ , preferably only divalent Eu 2+ .
- the Eu 2+ concentration is important to be 0.1-5 mol 1% of the concentration of Sr in the mother crystal, and is particularly preferably 0.3-1 mol 1%.
- a part of Sr may be substituted with either one or both of Ca and Ba.
- C a and B a By replacing a part of Sr with one or both of C a and B a, it is possible to adjust the color in white light and to improve color rendering.
- the S r substitution amount of C a and B a can be substituted to 60 m o 1% or less with respect to S r, and desired white light can be obtained within this range.
- the phosphor of the present invention is excited by light having a wavelength of 250 nm to 480 nm and has a feature of emitting white light, specifically white light 1, preferably white light 2.
- the phosphor of the present invention is characterized by having emission peaks at least in the region of 460 nm soil 30 nm and 580 nm soil 30 nm by photoexcitation at a wavelength of 400 nm. Yes.
- the present invention phosphor, S r O material ,, MgO raw material, S material, Zn were respectively weighed according S I_ ⁇ 2 raw material, Eu 2+ raw material, as necessary, mixing the raw materials, a reducing atmosphere 1000 It can be obtained by baking at ⁇ 1400 ° C and classification as required.
- SrO raw material examples include Sr oxide, double oxide, carbonate, and the like.
- MgO raw material examples include Mg oxides, double oxides, carbonates, and the like.
- S i 0 2 raw material examples include silicon dioxide (S i 0 2 ) and compounds containing both S i and O. Also, colloidal silica dispersed in an aqueous solvent can be used.
- S raw material examples include SrS, S (sulfur), and H 2 S gas.
- Examples of the Zn raw material include Zn oxide, double oxide, carbonate, and the like. As described above, when replacing a part of Sr with either one or both of Ca and Ba, together with the SrO raw material, the Ca raw material and the Ba raw material are mixed and calcined. That's fine.
- examples of the Ca raw material and the Ba raw material include a double oxide and a carbonate in addition to an oxide of Ca or Ba.
- the Eu raw material can be cited EuF 3, Eu 2 ⁇ 3, EUC 1 Yu port Piumu compounds such as 3 (E u salt).
- rare earth elements such as Pr and Sm may be added to the raw material as a color adjusting agent.
- one or more elements selected from aluminum group elements such as Al and Ga may be added to the raw material as a sensitizer.
- one or more elements selected from rare earth elements such as Sc, Y, La, Gd, and Lu may be added to the raw material as a sensitizer. Good.
- Each of the above addition amounts is preferably 5 mol% or less. If the content of these elements exceeds 5 mol%, a large amount of heterogeneous phases may precipitate, and the luminance may be significantly reduced. Further, the alkali metal element, a monovalent cation metal A g +, etc., CI-, F-, halo Gen'ion of I-, etc. may be added to the raw material as charge compensators. The amount added is preferably about the same as the content of the aluminum group or the rare earth group in terms of charge compensation effect and brightness.
- Mixing of the raw materials may be performed either dry or wet.
- the mixing method is not particularly limited.
- zirconia balls may be used as media and mixed with a paint shaker or ball mill, and dried as necessary to obtain a raw material mixture. .
- the raw material is in a suspension state, and after mixing with a paint shaker or ball mill using zirconia balls as media, the media is separated with a sieve, and then dried under reduced pressure or vacuum.
- the dry raw material mixture may be obtained by removing water from the suspension by an appropriate drying method such as.
- the raw material mixture obtained as described above may be powdered, classified and dried. However, it is not always necessary to perform powdering, classification, and drying.
- Firing may be performed at 100 ° C. to 1400 ° C.
- the firing atmosphere at this time is a reducing atmosphere such as a nitrogen gas atmosphere containing a small amount of hydrogen gas or a carbon dioxide atmosphere containing carbon monoxide, particularly a weakly reducing atmosphere. It is preferable to make adjustments.
- a reducing atmosphere especially in a weakly reducing atmosphere, even if the Eu raw material contains trivalent Eu, the trivalent Eu is reduced to divalent Eu during the firing process. All can be converted to bivalent.
- the preliminary firing may be performed, for example, by firing the mixed powder in an atmosphere of air, oxygen, Ar, or hydrogen gas at 800 ° C. to 1 100 ° C. for 1 hour to 12 hours.
- the calcining temperature is less than 800 ° C, the decomposition of carbon dioxide gas is insufficient when using carbonates as raw materials, and when using halides, the flux effect cannot be obtained sufficiently.
- high temperatures exceeding 1100 ° C abnormal grain growth occurs, making it difficult to obtain uniform fine particles.
- the calcining time is less than 1 hour, reproducibility of the material properties is difficult to obtain.
- powder After calcining, powder may be mixed and fired so that the entire mixed powder becomes uniform.
- the phosphor of the present invention is composed of the Sr 3 Mg S i 20 8 phase, the S r 2 S i 0 4 phase, the S r S phase, and the S r 2 Z n S.
- the phosphor is composed of an i 20 7 phase, it is considered possible to produce a white phosphor by combining the following crystal phases or emission centers.
- IIa 2 Si S 4 , IIaGa 2 S 4 , IlaA 1 2 S 4 (Ilato x IIIb x ) S, (lib! -XIIIbx) S, IIa 2 ZnS 3 , M 2 0 2 S, etc. Can be mentioned.
- Examples of the luminescent center include Eu, Ce, Tb, Pr, Sm, Cu, Ag, and Au.
- the above Ila is one or a combination of two or more selected from the group consisting of Mg, Ca, Sr and Ba.
- Illb is one or a combination of two or more selected from the group consisting of Al, Ga and In.
- M is one or a combination of two or more selected from the group consisting of Sc, Y, La, Gd and Lu.
- the phosphor of the present invention can be used alone as a fluorescent ink for anti-counterfeit printing applications, etc., but forms a white light emitting element or device in combination with a phosphor capable of exciting the phosphor of the present invention.
- it can be used for special light sources, liquid crystal backlights, display devices such as EL, FED, and CRT display devices.
- display devices such as EL, FED, and CRT display devices.
- it emits white light with excellent color rendering, so it is particularly suitable for general lighting applications.
- a white light emitting element or device combining the phosphor of the present invention and a light emitter capable of exciting the phosphor
- This white phosphor can be arranged at a position where the received light can be received.
- a phosphor layer made of the phosphor of the present invention may be laminated on a light emitter layer made of a light emitter.
- the phosphor layer is prepared by adding the powdered phosphor of the present invention together with a binder to an appropriate solvent, thoroughly mixing and uniformly dispersing the resulting coating solution on the surface of the light emitting layer. Application and drying may be performed to form a coating film (phosphor layer).
- the phosphor layer of the present invention can be formed by kneading the phosphor of the present invention into a glass composition so that the phosphor of the present invention is dispersed in the glass layer.
- the phosphor of the present invention may be formed into a sheet shape, and this sheet may be laminated on the phosphor layer, or the phosphor of the present invention may be directly sputtered onto the phosphor layer to form a film. You can do it.
- Example 1 the phosphor of the present invention may be formed into a sheet shape, and this sheet may be laminated on the phosphor layer, or the phosphor of the present invention may be directly sputtered onto the phosphor layer to form a film. You can do it.
- a P L (photoluminescence) spectrum was measured using a spectrofluorometer (manufactured by Hitachi, F-4500).
- the luminance emission color (CIE chromaticity coordinate x y value) was measured using the following formula.
- the chromaticity coordinate values x and y are calculated using the following formula.
- ( ⁇ ), ⁇ ( ⁇ ), and ⁇ ( ⁇ ) are CIE spectral tristimulus values of 2 ° or 10 ° field of view. In this specification, spectral tristimulus values of 2 ° field of view are used. It was. References Phosphor Handbooks
- XRF X-ray fluorescence X-ray analysis
- SII X-ray fluorescence analyzer
- ICP emission analysis The total content of each element was measured using an analytical curve method using an ICP emission analyzer (RIG AKU, RIX 300 0) after being completely dissolved in hydrofluoric acid or the like.
- Example 1 1 2 240 40 140
- Example 1 1 3 230 30 130
- Example 1 1 5 210 10 110
- Example 1 1 6 250 50 150
- Eu concentration is 0.5 mol% relative to S r concentration.
- the obtained phosphor has the phase of S r 3 Mg S i 2 0 8 and S r 3 consists of a 2 S i 0 4 phases, as shown in Table 2, (S r O) x '(MgO) y ⁇ (S I_ ⁇ 2) z: Eu 2+, ⁇ beauty S r a Mg e S i e O f: was found to be a phosphor represented by the formula Eu 2+.
- Example 1 1 1 5.00 3.00 0 0 0.167 2.000 0 4.000 0.294 0.287
- Example 2 - (Example 2 - :! ⁇ 2-18, Comparative Example 2 1) and S r C0 3 as raw materials for host material, and MgO, and S I_ ⁇ 2, and S r S, are shown in Table 3
- the EuF 3 as the activator raw material was weighed so as to be 0.45 mo 1% with respect to the Sr, and this Eu F 3 together with the crystal base material ⁇ 3 mm
- the Zirconia pole was mixed for 90 minutes with a paint shaker. Next, the mixed powder and the media were separated with a 100 ⁇ m sieve, and fired at 1300 ° C. for 6 hours in a reducing gas atmosphere with nitrogen and hydrogen to obtain a phosphor.
- Example 2 11 200 12 108 4
- Eu concentration is 0.5 mol% relative to S r concentration.
- the obtained phosphor has the phase of S r 3 Mg S i 2 0 8 and S r 2 S i ⁇ 4 phase and S r S phase, as shown in Table 4, (S rC ⁇ — a S.) x '(Mg O) y ⁇ (S i 0 2 ) z : Eu 2 ⁇ Pi S r a S b Mg c S i e O f: was found to be a phosphor represented by the formula E u 2+.
- Example 2--1 5.50 3.25 0.10 0 0.148 2.077 0.019 4.077 0.406 0.324
- Example 2- -2 7.00 9.33 0.01 0 0.120 2.083 0.020 4.083 0.445 0.368
- Example 2-one 3 6.00 3J4 0.01 0 0.104 2.000 0.005 4.015 0.272 0.259
- Example 2--4 6.00 3.50 0.02 0 0.106 2.000 0.010 4.030 0.280 0.258
- Example 2--5 6.48 9.33 0.02 0 0.101 2.000 0.007 4.023 0.290 0.279
- Example 2--6 4.23 0.02 0 0.113 2.000 0.025 4.079 0.313 0.280
- Example 2- -7 6.00 3.25 0.043 0 0.120 2.000 0.036 4.126 0.330 0.280
- Example 2--1 5.50 3.25 0.10 0 0.148 2.077 0.019 4.077 0.406 0.324
- Example 2- -2 7.00 9.33 0.01 0 0.120 2.083 0.020 4.083 0.445
- the mixed powder and media were separated with a 100 m sieve, and baked at 1300 ° C for 6 hours in a reducing gas atmosphere with nitrogen and hydrogen to obtain a phosphor.
- the obtained phosphor has the phase of M 3 Mg S i 2 0 8 and M 2 S i 0 4 of the phase, consists of a phase of S r S, as shown in Table 6, (MO ⁇ SJ path (Mg O) y ⁇ (S I_ ⁇ 2) z: E u 2 ⁇ Pi M a S csl b oMg c S i e O f : Is it a phosphor represented by the formula of E u 2+?
- S r C_ ⁇ 3 as raw materials for host material, and Mg O, and S i 0 2, S r S and, a Z n O, as well as weighed as shown in Table 7, E as an activator raw material u F 3 is weighed so as to be 0.4 7 m o 1% with respect to S r, and this E u F 3 is used together with the crystal base material and ⁇ 3 mm zirconia balls as media. Mix for 90 minutes in a paint shaker. Next, the mixed powder and media are separated with a 100 ⁇ m sieve and reduced with nitrogen and hydrogen.
- Eu concentration is 0.5 mol% relative to S r concentration.
- the obtained phosphor has the phase of S r 3 Mg S i 2 0 8 and S r 3 2 S i 0 4 phase, S r S phase, and S r 2 Z n S i 2 0 7 phase, as shown in Table 8, (S r O ⁇ S
- Sr C0 3 as a crystal base material, MgO, and S i 0 2 are weighed to a molar ratio of 300: 100: 200, and Eu F 3 as an activator raw material is Weighed so that it would be 6 7 mo 1% with respect to Sr, and mixed this Eu F 3 together with the crystal base material with a paint shaker using ⁇ 3 mm Zirco-Ure balls as media. .
- the mixed powder and media are separated with a 100 / im sieve, calcined at 300 ° C for 6 hours in a reducing gas atmosphere with nitrogen and hydrogen, and Sr 3 Mg Si 2 0 8 : A phosphor A represented by the formula Eu 2+ was obtained.
- Sr C 0 3 as a crystal base material and S i 0 2 are weighed so as to have a molar ratio of 200: 100, and EuF 3 as an activator raw material is 0.45mo 1% was weighed, and this Eu F 3 was mixed with the crystal matrix raw material for 90 minutes with a paint shaker using ⁇ 3 mm zirconia balls as media. Next, the mixed powder and media are separated with a 100 ⁇ sieve and calcined in a reducing gas atmosphere with nitrogen and hydrogen at 1 300 ° C for 6 hours.
- S r 2 S i 0 4 Eu 2+ formula A phosphor B represented by Phosphor A was mixed with phosphor A to obtain phosphor C.
- the obtained phosphor C was mixed with a paint shaker for 30 minutes using a ⁇ 3 mm zirconia ball as a medium.
- the mixed powder and media were separated with a 100 ⁇ sieve and fired at 1300 ° C for 6 hours in a reducing gas atmosphere with nitrogen and hydrogen.
- Each of the phosphors obtained in the above examples emits light by photoexcitation at a wavelength of 250 nm to 480 nm, and at least wavelengths of 46 O ⁇ 30 nm and 580 nm ⁇ 30 nm by photoexcitation at a wavelength of 400 nm.
- the white phosphor of Comparative Example 4 has a light emission peak in the region of at least wavelengths of 460 nm ⁇ 30 nm and 580 nm ⁇ 30 nm by excitation at a wavelength of 400 nm, as in Examples 1-3.
- the white phosphor of Comparative Example 4 has a larger particle size than the white phosphor of Example 1 1-3 and is not uniformly dispersed, so color dispersion is poor. It was uniform.
- pulverization must be performed. The milling process not only complicates the process, but also the emission intensity decreased to less than half as shown in Fig. 6, the color balance was lost, and no white light emission was obtained. The luminescence intensity did not recover even after heat treatment (annealing).
- a temperature controller while controlling the temperature using a Peltier element, heat the measurement sample so that the temperature of the sample increases at a rate of 1 ° C / second, and at the same time, use the spectrofluorometer. Used to measure the PL spectrum and color change of the sample.
- Patent Document 3 phosphor Example 2 and traces (JP 200 5 226 069 JP) (B a L173 C a 0 .39iMg 0. 198 E u 0. 2 Mn 0. 04 S i 0 4) Got.
- the phosphor of Comparative Example 5 has a large color change with a rise in temperature, and in particular, the X value has increased, so it has shifted to red, whereas the phosphor of Example 2-18 has It was found that the color change with increasing temperature was remarkably small.
- the measurement result of Example 2-1-8 was shown. However, when the measurement was made in the same manner for Examples other than Example 2-1-8, the temperature increased in comparison with Comparative Example 5. It was found that the color change associated with was significantly small.
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Abstract
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US12/227,520 US7659658B2 (en) | 2006-05-19 | 2007-05-17 | White phosphor, and white light-emitting equipment or device |
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JP2008297505A (ja) * | 2007-06-04 | 2008-12-11 | Mitsui Mining & Smelting Co Ltd | 電子線励起用白色蛍光体および白色発光素子乃至装置 |
JP4708507B2 (ja) * | 2009-09-18 | 2011-06-22 | 三井金属鉱業株式会社 | 蛍光体 |
US8638527B2 (en) | 2009-10-16 | 2014-01-28 | Hitachi Global Storage Technologies Netherlands B.V. | Signaling method and apparatus for write assist of high coercivity media using integrated half coil |
US8411390B2 (en) | 2009-10-16 | 2013-04-02 | Hitachi Global Storage Technologies Netherlands B.V. | Integrated half coil structure for write assist of high coercivity media |
JP2013191385A (ja) * | 2012-03-13 | 2013-09-26 | Toshiba Lighting & Technology Corp | 照明装置 |
WO2014065292A1 (ja) * | 2012-10-23 | 2014-05-01 | 三井金属鉱業株式会社 | 蛍光体、led発光素子及び光源装置 |
JP6241812B2 (ja) * | 2013-11-01 | 2017-12-06 | 宇部興産株式会社 | 白色発光蛍光体及び白色発光装置 |
CN103840066B (zh) * | 2013-12-30 | 2016-08-17 | 广州市鸿利光电股份有限公司 | 一种通过调节荧光粉浓度制作led器件的方法 |
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2007
- 2007-04-24 JP JP2007113952A patent/JP4188404B2/ja not_active Expired - Fee Related
- 2007-05-17 US US12/227,520 patent/US7659658B2/en not_active Expired - Fee Related
- 2007-05-17 CN CN2007800166931A patent/CN101437922B/zh not_active Expired - Fee Related
- 2007-05-17 KR KR1020087020731A patent/KR101042583B1/ko active IP Right Grant
- 2007-05-17 DE DE112007001219.6T patent/DE112007001219B4/de not_active Expired - Fee Related
- 2007-05-17 WO PCT/JP2007/060564 patent/WO2007136105A1/ja active Application Filing
- 2007-05-18 TW TW096117704A patent/TW200804567A/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003142004A (ja) * | 2001-10-31 | 2003-05-16 | Hitachi Ltd | 発光装置及びこれを用いた表示装置 |
JP2003306674A (ja) * | 2002-04-15 | 2003-10-31 | Sumitomo Chem Co Ltd | 白色led用蛍光体とそれを用いた白色led |
JP2005226069A (ja) * | 2004-01-16 | 2005-08-25 | Mitsubishi Chemicals Corp | 蛍光体、及びそれを用いた発光装置、照明装置、ならびに画像表示装置 |
JP2006124644A (ja) * | 2004-09-28 | 2006-05-18 | Sumitomo Chemical Co Ltd | 蛍光体 |
Also Published As
Publication number | Publication date |
---|---|
US7659658B2 (en) | 2010-02-09 |
TWI372177B (ja) | 2012-09-11 |
DE112007001219B4 (de) | 2017-10-05 |
JP2007332352A (ja) | 2007-12-27 |
DE112007001219T5 (de) | 2009-03-12 |
US20090108732A1 (en) | 2009-04-30 |
TW200804567A (en) | 2008-01-16 |
KR20080090530A (ko) | 2008-10-08 |
KR101042583B1 (ko) | 2011-06-20 |
JP4188404B2 (ja) | 2008-11-26 |
CN101437922B (zh) | 2012-05-23 |
CN101437922A (zh) | 2009-05-20 |
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