WO2020203234A1 - 蛍光体、その製造方法および発光素子 - Google Patents
蛍光体、その製造方法および発光素子 Download PDFInfo
- Publication number
- WO2020203234A1 WO2020203234A1 PCT/JP2020/011567 JP2020011567W WO2020203234A1 WO 2020203234 A1 WO2020203234 A1 WO 2020203234A1 JP 2020011567 W JP2020011567 W JP 2020011567W WO 2020203234 A1 WO2020203234 A1 WO 2020203234A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phosphor
- range
- less
- light emitting
- wavelength
- Prior art date
Links
Images
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
-
- 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
- C09K11/77348—Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
-
- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/77927—Silicon Nitrides or Silicon Oxynitrides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/30—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6
-
- 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
- C09K11/64—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing aluminium
-
- 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
-
- 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
- C09K11/77347—Silicon Nitrides or Silicon Oxynitrides
-
- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/77928—Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/30—Three-dimensional structures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
Definitions
- the present disclosure relates to a phosphor that emits near-infrared light by irradiating with visible light or ultraviolet light, a method for producing the same, and a light emitting element using the phosphor.
- This white light emitting diode is configured by combining a blue light emitting diode (hereinafter referred to as an LED) and a phosphor that converts blue into yellow and red.
- an LED blue light emitting diode
- a phosphor that converts blue into yellow and red.
- the fluorescent material for this purpose for example, the fluorescent materials of Patent Documents 1 and 2 are known.
- a liquid crystal backlight application it is composed of a blue LED, a green phosphor having a sharp spectrum, and a red phosphor.
- a green phosphor for this purpose a phosphor containing europium (hereinafter referred to as Eu) in ⁇ -type sialon is known (see, for example, Patent Document 3).
- a blue phosphor that crystallizes the JEM phase LaAl (Si 6-z Al z ) N 10-z Oz ) as a parent crystal is known (Patent Document 4).
- Halogen lamps and xenon lamps are known as lamps other than incandescent lamps and fluorescent lamps. These lamps are characterized in that they emit near-infrared light components having a wavelength of 760 nm or more in addition to light in the visible region having a wavelength of 380 nm to 760 nm. Therefore, these lamps are used as light sources for industrial equipment such as spectroscopic analyzers using near-infrared light, and their replacement with LEDs has not progressed.
- the phosphor used is a material that emits a visible range of 380 nm to 760 nm, and a material that emits near infrared light has not been studied.
- a phosphor having divalent Eu as a luminescent ion is known to emit ultraviolet, blue, green, yellow, and red, but a material that emits near infrared rays of 760 nm or more has not been known.
- a phosphor that emits light having a wavelength of 760 nm or more when irradiated with ultraviolet light or visible light in order to add light emission in the near infrared region to the white LED. Further, it is possible to provide a phosphor conversion LED (a lighting device in which a phosphor and a monochromatic LED are combined) using the manufacturing method and a phosphor.
- M [1] element is Li
- M [2] element are Mg, Ca, Ba, Sr
- M [3] element is Al, Y, La, Gd
- Si element is Si
- nitrogen element oxygen element-containing nitride or oxynitride
- a specific composition It has been found that those having a region range, a specific solid solution state and a specific crystal phase are phosphors having peaks in the wavelength range of 760 nm to 850 nm.
- a method for producing such a phosphor a nitride or oxide of Eu element, a nitride or oxide of M [3] element, a nitride of Si element, and if necessary, M [1]
- a method for synthesizing a phosphor by mixing and heating a raw material selected from an elemental nitride or oxide, an elemental nitride or oxide, and an oxide of Si.
- a solid-state device that emits near-infrared components by combining such a phosphor with ultraviolet, blue, and visible light emitting diodes. The configuration is as described below.
- the phosphor is composed of at least an Eu element and an M [3] element (M [3] is at least one element selected from the group consisting of Al, Y, La and Gd). , Si element and nitrogen element, and if necessary, M [1] element (M [1] is Li element) and M [2] element (M [2] are Mg, Ca, Ba and It contains an inorganic substance containing at least one element selected from the group consisting of Sr) and at least one element selected from the group consisting of oxygen elements, and is 760 nm or more and 850 nm or less by irradiating an excitation source. It may have a maximum value of the emission peak at a wavelength in the range of.
- the inorganic substance M [1] a Eu b M [2] c M [3] d Si e O f N g ( however, a + b + c + d + e + f + g 1) is a composition represented by the parameters a, b, c, d, e, f , G 0 ⁇ a ⁇ 0.01 0.006 ⁇ b ⁇ 0.15 0 ⁇ c ⁇ 0.15 0.001 ⁇ d ⁇ 0.07 0.3 ⁇ e ⁇ 0.35 0 ⁇ f ⁇ 0.05 0.5 ⁇ g ⁇ 0.56 It may be represented by a numerical value of.
- the inorganic substance may have the same crystal structure as any one of Eu 2 Si 5 N 8 , Ca 2 Si 5 N 8 , Sr 2 Si 5 N 8 , and Ba 2 Si 5 N 8 .
- the M [2] element may be contained.
- the M [3] element may be La alone.
- the M [3] element contains at least La, and the La may be contained in the range of 0.19 atomic% or more and 7 atomic% or less.
- the Eu element may be contained in an amount of 0.6 atomic% or more.
- the inorganic substance may be Eu 2 Si 5 N 8 : La.
- the inorganic substance may be Sr 2 Si 5 N 8 : Eu, La.
- the inorganic substance may be Ba 2 Si 5 N 8 : Eu, La.
- the excitation source may be light having a wavelength in the range of 300 nm or more and 600 nm or less.
- the excitation source is light having a wavelength in the range of 300 nm or more and 600 nm or less, and the emission intensity at 630 nm when irradiated with the light is 1/2 or less of the maximum value wavelength in the range of 760 nm or more and 850 nm or less. May emit fluorescence with.
- the above-mentioned method for producing a phosphor is composed of a nitride or oxide of Eu element, a nitride or oxide of M [3] element, a nitride of Si element, and if necessary.
- a nitride or oxide of M [1] element, a nitride or oxide of M [2] element, and at least one raw material selected from the group consisting of an oxide of Si element are mixed and mixed at 1400 ° C. It may be fired at a temperature of 2200 ° C. or lower. In this way, the above problem may be solved.
- the excitation source emits light having a wavelength in the range of 300 nm or more and 600 nm or less, and the phosphor contains at least the above phosphor. May be good.
- the excitation source may be a light emitting diode (LED) or a laser diode (LD). Irradiation of the excitation source may further include one or more other phosphors that fluoresce with a maximum value (peak) at wavelengths in the range of 400 nm or more and less than 760 nm.
- Each of the above one or more other phosphors is from the group consisting of ⁇ -sialon: Ce, ⁇ -sialon: Eu, ⁇ -sialon: Eu, CaAlSiN 3 : Ce, and (Ca, Sr) AlSiN 3 : Eu. It may be selected. In the wavelength range of 520 nm or more and 850 nm or less, the minimum value of the emission intensity may have a spectral shape of 1/5 or more of the maximum value.
- the phosphor is composed of an Eu element and an M [3] element (M [3] is one or more elements selected from the group consisting of Al, Y, La and Gd).
- M [3] is one or more elements selected from the group consisting of Al, Y, La and Gd.
- the phosphor is at least one or more elements selected from the group consisting of Eu element and M [3] element (M [3] is Al, Y, La and Gd. ), Si element, and nitrogen element, and if necessary, M [1] element (M [1] is Li element) and M [2] element (M [2] are Mg, Ca, Ba. And a mixture of elements containing at least one element selected from the group consisting of Sr) and an inorganic substance containing at least one element selected from the group consisting of oxygen elements.
- the excitation source when the excitation source is irradiated, fluorescence having a maximum value of the emission peak can be emitted at a wavelength in the range of 760 nm or more and 850 nm or less. If the composition of the inorganic substance is out of this range, the fluorescence in the range of 760 nm or more and 850 nm or less may decrease.
- the excitation source ultraviolet rays, visible light, electron beams, X-rays and the like can be used, but light having a wavelength of 300 nm to 600 nm emitted by a solid-state illuminating element such as a light emitting diode (LED) or a laser diode (LD) is preferable. It may be.
- LED light emitting diode
- LD laser diode
- Such an excitation source is preferable because it has high excitation efficiency.
- M [1] and oxygen may or may not be contained in the inorganic substance.
- M [1] and oxygen may or may not be contained in the inorganic substance.
- a is a parameter indicating the content of the monovalent element M [1]. 0 ⁇ a ⁇ 0.01 It may be in the range of.
- the M [1] element has the effect of adjusting the electric value when substituting the divalent element Eu element or M [2] with the trivalent element M [3] so that the crystal is stabilized. Is. When the element of M [1] is not added, the charge when replacing Eu or M [2] with M [3] is adjusted by the loss of a part of Eu or M [2] or Si element. It is possible that M [1] is not included. If a exceeds 0.01, the stability of the crystal structure may be impaired and the emission intensity may decrease.
- b is a parameter indicating the content of the element of Eu, 0.006 ⁇ b ⁇ 0.15 It may be in the range of. Outside this range, light may not be emitted in the range of 760 nm or more and 850 nm or less. More preferably 0.006 ⁇ b ⁇ 0.13 It may be in the range of, and it seems that the emission intensity is higher.
- c is a parameter indicating the content of the divalent element M [2]. 0 ⁇ c ⁇ 0.15 It may be in the range of.
- the M [2] element is an arbitrary element, but if the value is outside this range, the stability may be impaired and the emission intensity may decrease. More preferably 0 ⁇ c ⁇ 0.12 It may be in the range of, and it seems that the emission intensity is higher.
- d is a parameter indicating the content of the trivalent element M [3]. 0.001 ⁇ d ⁇ 0.07 It may be in the range of. If it is less than 0.001, M [2] 2 Si 5 N 8 : Eu emits light in the range of 600 nm to 700 nm, which is the emission color of Eu, and may not emit light in the range of 760 nm or more and 850 nm. If it is larger than 0.07, the stability of the crystal structure may be impaired and the emission intensity may decrease. More preferably 0.0019 ⁇ d ⁇ 0.07 The light emitting component in the range of 760 nm or more and 850 nm seems to be high. More preferably It may be in the range of 0.0019 ⁇ d ⁇ 0.04.
- e is a parameter indicating the Si content, 0.3 ⁇ e ⁇ 0.35 It may be in the range of. If it is out of this range, the stability of the crystal structure is impaired and the emission intensity may decrease.
- g is a parameter indicating the nitrogen content, 0.5 ⁇ g ⁇ 0.56 It may be in the range of. If it is out of this range, the stability of the crystal structure is impaired and the emission intensity may decrease. More preferably 0.53 ⁇ g ⁇ 0.56 It may be in the range of, and it seems that the emission intensity is particularly high.
- the M [3] element is contained in the crystal in an amount corresponding to 0.1 ⁇ y ⁇ 0.5, the emission wavelength is lengthened, and the emission component in the range of 760 nm or more and 850 nm or less seems to increase.
- the M [2] element is an arbitrary element in the formula represented by (Eu, M [2]) 2 Si 5 N 8 .
- (Eu, M [2]) means that the Eu element and the M [2] element are located at an arbitrary composition including the case where the M [2] element is 0 at the same site of the crystal structure described later.
- a phosphor having the same crystal structure as any of Ba 2 Si 5 N 8 , Sr 2 Si 5 N 8 , Ca 2 Si 5 N 8 , and Eu 2 Si 5 N 8 whose inorganic substance has the same crystal structure is particularly 760 nm or more and 850 nm or less.
- the emission intensity in the range seems to be high.
- the same crystal structure means that the space groups, lattice constants, and atomic positions of the crystals shown in Tables 1 to 4 are exactly the same, and that different elements are dissolved to form a solid solution from the original atomic position. By changing the atomic position within the range of 5% or less, the space group and the lattice constant can be changed.
- the length of the chemical bond (distance between neighboring atoms) calculated from the lattice constant and atomic coordinates obtained by performing a Rietbelt analysis of the results of X-ray diffraction and neutron diffraction in the space groups shown in Tables 1 to 4 is , It can be said that the crystal structure is the same when the length of the chemical bond calculated from the lattice constants and atomic coordinates shown in Tables 1 to 4 is within ⁇ 5%. Simply, when the diffraction patterns are the same and the difference in lattice constant is within 5%, it can be said that the crystal structures are the same.
- the crystal structure parameters of Ba 2 Si 5 N 8 , Sr 2 Si 5 N 8 , Ca 2 Si 5 N 8 , and Eu 2 Si 5 N 8 are shown in Tables 1 to 4, respectively. Further, these crystal structure models are shown in FIGS. 1 to 4, respectively.
- the atom arranged at the center of the tetrahedron is Si
- the atom arranged at each vertex of the tetrahedron is N.
- Ba 2 Si 5 N 8 , Sr 2 Si 5 N 8 and Eu 2 Si 5 N 8 are all orthorhombic crystals having the space group Pmn2 1.
- the lattice constants a, b, and c each match within an error range of 5% or less. Since these inorganic compounds are isomorphic crystals, it is considered that they can be solid-solved at the total compounding ratio.
- a phosphor containing no M [2] element seems to have many luminescent components in the range of 800 nm or more and 850 nm or less, and is therefore preferable as a phosphor for near infrared applications.
- a phosphor in which the M [3] element is La alone seems to have many luminescent components in the range of 800 nm or more and 850 nm or less, and is therefore preferable as a phosphor for near infrared applications.
- the M [3] element contains at least La, and the content thereof may preferably satisfy the range of 0.19 atomic% or more and 7 atomic% or less. Thereby, the maximum value of the emission peak can be held in the wavelength range of 760 nm or more and 850 nm or less.
- the Eu element can preferably be contained in an amount of 0.6 atomic% or more.
- the upper limit is not particularly limited as long as the crystal structure is maintained, but may be 13 atomic% or less, more preferably 12.7 atomic% or less. If La and Eu are contained in the above ranges, it seems that there are many luminescent components in the range of 800 nm or more and 850 nm or less, which is particularly preferable as a phosphor for near infrared applications.
- the inorganic substance can contain La of 0.19 atomic% or more and 7 atomic% or less, and a phosphor containing Eu of 0.6 atomic% or more is particularly preferable as a phosphor for near infrared applications.
- a phosphor in which the inorganic substance is Eu 2 Si 5 N 8 : La seems to have many luminescent components in the range of 800 nm or more and 850 nm or less, and is therefore preferable as a phosphor for near infrared applications.
- the formula Eu 2 Si 5 N 8 : La represents a material in which a small amount of La is added (activated) to Eu 2 Si 5 N 8 crystals, and is a notation generally used for phosphors.
- a phosphor in which the inorganic substance is Sr 2 Si 5 N 8 : Eu, La seems to have many luminescent components in the range of 800 nm or more and 850 nm or less, and is therefore preferable as a phosphor for near infrared applications.
- the formula of Sr 2 Si 5 N 8 : Eu, La represents a material in which a small amount of Eu and La are added (activated) to Sr 2 Si 5 N 8 crystals, and is a notation generally used for phosphors. is there.
- a phosphor in which the inorganic substance is Ba 2 Si 5 N 8 : Eu, La seems to have many luminescent components in the range of 800 nm or more and 850 nm or less, and is therefore preferable as a phosphor for near infrared applications.
- the formula of Ba 2 Si 5 N 8 : Eu, La represents a material in which a small amount of Eu and La are added (activated) to a Ba 2 Si 5 N 8 crystal, and is a notation generally used for a phosphor. is there.
- the phosphor has a maximum value of the emission peak in the wavelength range of 760 nm or more and 850 nm or less, and is used for near infrared applications. It is preferable as a phosphor of. With the above-mentioned specific composition and crystal structure, the emission peak has a maximum value in the wavelength range of 760 nm or more and 850 nm or less.
- the phosphor preferably has an excitation source of light having a wavelength in the range of 300 nm or more and 600 nm or less, and in the embodiment of the present invention, when the phosphor is irradiated with light, it emits light of 630 nm. It has a spectral shape whose intensity is 1 ⁇ 2 or less of the maximum wavelength in the range of 760 nm or more and 850 nm or less.
- the phosphor has a large amount of light emitting components in the range of 800 nm or more and 850 nm or less, and is preferable as a phosphor for near infrared applications.
- the method for producing the phosphor is not particularly specified, but there are the following production methods as examples.
- the above-mentioned fluorescence is obtained by mixing an elemental nitride or oxide and a raw material selected at least one from the group consisting of an elemental oxide and firing at a temperature of 1400 ° C. or higher and 2200 ° C. or lower.
- the body can be manufactured.
- the reaction may not proceed sufficiently and the emission intensity may decrease. If the temperature is higher than 2200 ° C., Eu volatilizes, which may reduce the Eu content and reduce the emission intensity.
- the M [1] element, the M [2] element, and the M [3] element are as described above, the description thereof will be omitted.
- the use of the phosphor is not particularly specified, but as an example, there is a light emitting element combined with an excitation source.
- a light emitting device including an excitation source that emits light in the range of 300 nm or more and 600 nm or less, and at least the above-mentioned phosphor. Since such a light emitting element contains near infrared rays of 760 nm or more, it is suitable for a lamp that requires a near infrared component.
- the excitation source described above is preferably a light emitting diode (LED) or a laser diode (LD).
- LED light emitting diode
- LD laser diode
- light emission further comprising one or more other phosphors that emit fluorescence having a maximum value (peak) at a wavelength in the range of 400 nm or more and less than 760 nm by irradiation with an excitation source.
- the element contains light components from the visible region to the near infrared region, it is suitable as a light source for applications that require visible to near infrared light.
- Each of the one or more other phosphors preferably comprises ⁇ -sialon: Ce, ⁇ -sialon: Eu, ⁇ -sialon: Eu, CaAlSiN 3 : Ce, and (Ca, Sr) AlSiN 3 : Eu. Selected from the group.
- a light emitting element is preferable because it has high light emission intensity in the visible region and near infrared light.
- the light emitting element has a spectral shape in which the minimum value of the emission intensity is 1/5 or more of the maximum value at a wavelength in the range of 520 nm or more and 850 nm or less. It is preferable that the phosphor and one or more other phosphors described above are mixed. Thereby, in the embodiment of the present invention, the light emitting element can evenly include the light from the visible region to the near infrared region.
- the raw material powder used was silicon nitride powder (SN-E10 grade manufactured by Ube Kosan Co., Ltd.) having a specific surface area of 11.2 m 2 / g, an oxygen content of 1.29% by weight, and an ⁇ -type content of 95%, and a specific surface area of 3.
- Examples 1 to 37 Lithium nitride, europium nitride, magnesium nitride, calcium nitride, strontium nitride, barium nitride, aluminum nitride, lanthanum nitride, and silicon nitride powder were used as starting materials.
- Table 5 shows the atomic ratio of the design composition
- Table 6 shows the atomic% of the composition
- Table 7 shows the parameter notation of the composition.
- the mixture was mixed in a glove box having an oxygen content of 1 ppm or less using a silicon nitride mortar and pestle at the ratio shown in Table 8, and the mixed powder was placed in a boron nitride crucible.
- the crucible was set in a graphite resistance heating type electric furnace.
- the firing atmosphere is evacuated by a diffusion pump, heated from room temperature to 800 ° C. at a rate of 500 ° C. per hour, and nitrogen having a purity of 99.999% by volume is introduced at 800 ° C. to increase the pressure to 0.9 MPa.
- the temperature was raised to 1600 ° C. at 500 ° C. per hour, and the temperature was maintained at that temperature for 2 hours.
- the synthesized sample was pulverized into powder using a silicon nitride milk bowl and a milk stick, and powder X-ray diffraction measurement (XRD) was performed using Cu K ⁇ rays.
- XRD powder X-ray diffraction measurement
- all the detected crystal phases have the same crystal structure as any of the crystals of Eu 2 Si 5 N 8 , Ca 2 Si 5 N 8 , Sr 2 Si 5 N 8 , and Ba 2 Si 5 N 8 . It was a crystal with.
- the same crystal structure means that the diffraction pattern is the same and the lattice constant is the same or slightly changed by 2% or less.
- the excitation spectrum and emission spectrum of the synthesized powder were measured using an FP8600 type fluorescence spectrophotometer manufactured by JASCO Corporation. The maximum emission wavelength was obtained from the emission spectrum. The results are shown in Table 9.
- FIG. 5 is a diagram showing excitation and emission spectra of the powder of Example 3.
- FIG. 6 is a diagram showing excitation and emission spectra of the powder of Example 12.
- FIG. 7 is a diagram showing excitation and emission spectra of the powder of Example 16.
- FIG. 8 is a diagram showing excitation and emission spectra of the powder of Example 23.
- the peak whose intensity reaches 2 is the one that detects the direct light at the time of measurement and is not the light emission from the material, so it is not considered as the light emission peak.
- the powders of all the examples were phosphors that emit near-infrared light, specifically, having a maximum emission wavelength in the range of 760 nm to 850 nm, by irradiation with visible light or ultraviolet rays. Further, it was confirmed that the powders of all the examples had a spectral shape in which the emission intensity at 630 nm was 1/2 or less of the maximum value wavelength in the range of 760 nm or more and 850 nm or less.
- Comparative Examples 1 to 9 The powders of Comparative Examples 1 to 9 were synthesized by the same method as in Examples 1 to 37 with the design parameters shown in Tables 10 to 12.
- FIG. 9 is a diagram showing the excitation and emission spectra of the powder of Comparative Example 4.
- FIG. 10 is a diagram showing excitation and emission spectra of the powder of Comparative Example 8.
- the emission peak wavelength of the powder of Comparative Example 4, which is pure Eu 2 Si 5 N 8 was 696 nm.
- the emission peak wavelength of Comparative Example 8 which is Sr 2 Si 5 N 8 : Eu containing no La was 674 nm.
- Table 13 it was found that none of Comparative Examples 1 to 9 satisfying the above-mentioned composition (parameter) had a maximum value of the emission peak at a wavelength in the range of 760 nm or more and 850 nm or less.
- the emission peak wavelengths of the powders of Comparative Examples 4 to 9 having a La content of less than 0.19 atomic% were all less than 700 nm.
- the emission peak wavelengths of the powders of Comparative Examples 1 to 3 having an Eu content of 0.6 atomic% or less were also less than 700 nm.
- FIG. 11 is a schematic view showing a light emitting device in the embodiment of the present invention.
- FIG. 11 shows a chip-type infrared light emitting diode lamp (11) for mounting on a substrate as a light emitting device.
- Two lead wires (12, 13) are fixed to a white alumina ceramics substrate (19) having high visible light reflectance, one end of these wires is located approximately in the center of the substrate, and the other end is external. It is an electrode that is soldered when mounted on an electric board.
- One of the lead wires (12) has a blue light emitting diode element (14) having an emission peak wavelength of 450 nm mounted and fixed on one end thereof so as to be in the center of the substrate.
- the lower electrode of the blue light emitting diode element (14) and the lower lead wire are electrically connected by a conductive paste, and the upper electrode and the other lead wire (13) are electrically connected by a fine gold wire (15). Is connected.
- the first resin (16) and the phosphor produced in Example 1 are mounted in the vicinity of the light emitting diode element.
- the first resin in which the phosphor is dispersed is transparent and covers the entire blue light emitting diode element (14).
- a wall surface member (20) having a hole in the center is fixed on the ceramic substrate.
- the central portion of the wall surface member (20) is a hole for the resin (16) in which the blue light emitting diode element (14) and the phosphor (17) are dispersed, and the central portion is a slope. It has become. This slope is a reflecting surface for extracting light forward, and the curved shape of the slope is determined in consideration of the light reflecting direction.
- the surface constituting the reflecting surface is a surface having a white or metallic luster and a high visible light reflectance.
- the wall surface member (20) is made of a white silicone resin.
- the hole in the center of the wall surface member forms a recess as the final shape of the chip-type light emitting diode lamp, and the first resin (14) in which the blue light emitting diode element (14) and the phosphor (17) are dispersed is formed therein.
- a transparent second resin (18) is filled so as to seal all of 16).
- the same epoxy resin was used for the first resin (16) and the second resin (18). In this way, a light emitting device that emits near-infrared light was obtained.
- Example of light emitting device A chip-type white and near-infrared light emitting diode lamp (11) for mounting on a substrate was manufactured.
- Two lead wires (12, 13) are fixed to a white alumina ceramics substrate (19) having high visible light reflectance, one end of these wires is located approximately in the center of the substrate, and the other end is external. It is an electrode that is soldered when mounted on an electric board.
- One of the lead wires (12) has a blue light emitting diode element (14) having an emission peak wavelength of 450 nm mounted and fixed on one end thereof so as to be in the center of the substrate.
- the lower electrode of the blue light emitting diode element (14) and the lower lead wire are electrically connected by a conductive paste, and the upper electrode and the other lead wire (13) are electrically connected by a fine gold wire (15). Is connected.
- a mixture of a red phosphor to which Eu is added is mounted in the vicinity of the light emitting diode element.
- the first resin in which the phosphor is dispersed is transparent and covers the entire blue light emitting diode element (14). Further, a wall surface member (20) having a hole in the center is fixed on the ceramic substrate.
- the central portion of the wall surface member (20) is a hole for the resin (16) in which the blue light emitting diode element (14) and the phosphor (17) are dispersed, and the central portion is a slope. It has become.
- This slope is a reflecting surface for extracting light forward, and the curved shape of the slope is determined in consideration of the light reflecting direction. Further, at least the surface constituting the reflecting surface is a surface having a white or metallic luster and a high visible light reflectance.
- the wall surface member (20) is made of a white silicone resin. In this way, a light emitting device that emits visible to near-infrared light was obtained.
- the nitride phosphor has a longer emission wavelength than the conventional Eu-activated phosphor and emits near infrared rays of 760 nm or more.
- the near-infrared light component will be widely used in light sources that require it and contribute to the development of the industry.
Abstract
Description
前記無機物質が、
M[1]aEubM[2]cM[3]dSieOfNg(ただし、a+b+c+d+e+f+g=1)で表される組成であり、パラメータa、b、c、d、e、f、gが、
0 ≦ a ≦ 0.01
0.006 ≦ b ≦ 0.15
0 ≦ c ≦ 0.15
0.001 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
0 ≦ f ≦ 0.05
0.5 ≦ g ≦ 0.56
の数値で表されてもよい。
前記無機物質が、
M[1]aEubM[2]cM[3]dSieOfNg(ただし、a+b+c+d+e+f+g=1)で表される組成であり、パラメータa、b、c、d、e、f、gが、
a = 0
0.006 ≦ b ≦ 0.13
0 ≦ c ≦ 0.12
0.0019 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
f = 0
0.53 ≦ g ≦ 0.56
の数値で表されてもよい。
前記無機物質が、
(Eu,M[2])xM[3]ySi5N8、
ただし、x=2-1.5y、0.1 ≦ y ≦ 0.5、
で表されてもよい。
前記無機物質が、Eu2Si5N8、Ca2Si5N8、Sr2Si5N8、Ba2Si5N8のいずれかと同一の結晶構造を持ってもよい。
前記M[2]元素を含有してもよい。
前記M[3]元素がLa単独であってもよい。
前記M[3]元素は、少なくともLaを含有し、前記Laは、0.19原子%以上7原子%以下の範囲で含有されてもよい。
前記Eu元素は、0.6原子%以上含有されてもよい。
前記無機物質が、Eu2Si5N8:Laであってもよい。
前記無機物質が、Sr2Si5N8:Eu,Laであってもよい。
前記無機物質が、Ba2Si5N8:Eu,Laであってもよい。
前記励起源は、300nm以上600nm以下の範囲の波長の光であってもよい。
前記励起源が、300nm以上600nm以下の範囲の波長の光であり、前記光を照射した際の630nmの発光強度が、760nm以上850nm以下の範囲の最大値波長の1/2以下であるスペクトル形状を持つ蛍光を発してもよい。
本発明の実施例において、上記蛍光体の製造方法は、Eu元素の窒化物または酸化物と、M[3]元素の窒化物または酸化物と、Si元素の窒化物と、必要に応じて、M[1]元素の窒化物または酸化物と、M[2]元素の窒化物または酸化物と、Si元素の酸化物とからなる群から選択される少なくとも1つの原料とを混合し、1400℃以上2200℃以下の温度で焼成してもよい。このようにして、上記課題を解決してもよい。
本発明の実施例において、励起源と蛍光体とを備える発光素子について、前記励起源は、300nm以上600nm以下の範囲の波長の光を発し、前記蛍光体は、少なくとも上記蛍光体を含有してもよい。
前記励起源は、発光ダイオード(LED)またはレーザーダイオード(LD)であってもよい。
前記励起源の照射によって、400nm以上760nm未満の範囲の波長に最大値(ピーク)を有する蛍光を発する1以上の別の蛍光体をさらに含んでもよい。
前記1以上の別の蛍光体のそれぞれは、α-サイアロン:Ce、β-サイアロン:Eu、α-サイアロン:Eu、CaAlSiN3:Ce、および、(Ca,Sr)AlSiN3:Euからなる群から選択されてもよい。
520nm以上850nm以下の範囲の波長において、発光強度の最小値が最大値の1/5以上であるスペクトル形状を有してもよい。
0 ≦ a ≦ 0.01
0.006 ≦ b ≦ 0.15
0 ≦ c ≦ 0.15
0.001 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
0 ≦ f ≦ 0.05
0.5 ≦ g ≦ 0.56
の数値で表されるものは、特に760nm以上850nm以下の範囲の発光強度が高いようである。ここで、M[1]および酸素は無機物質中に含んでもよいし含まなくてもよい。
a = 0
0.006 ≦ b ≦ 0.13
0 ≦ c ≦ 0.12
0.0019 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
f = 0
0.53 ≦ g ≦ 0.56
の数値で表されるものは、特に760nm以上850nm以下の範囲の発光強度がいっそう高いようである。ここで、M[1]および酸素は無機物質中に含んでもよいし含まなくてもよい。
0 ≦ a ≦ 0.01
の範囲でもよい。M[1]元素は2価の元素であるEu元素あるいはM[2]を3価の元素であるM[3]で置換する際に電価を調整する効果があり、結晶が安定化するようである。M[1]の元素を添加しない場合は、EuあるいはM[2]をM[3]で置換する際の電荷は、EuまたはM[2]やSi元素の一部が欠損することにより調整されている可能性があり、M[1]を含まなくてもよい。aが0.01を超えると結晶構造の安定性が損なわれて発光強度が低下する恐れがある。
0.006 ≦ b ≦ 0.15
の範囲でもよい。この範囲外では760nm以上850nm以下の範囲で発光しない場合がある。より好ましくは、
0.006 ≦ b ≦ 0.13
の範囲でもよく、いっそう発光強度が高いようである。
0 ≦ c ≦ 0.15
の範囲でもよい。M[2]元素は任意元素であるが、この範囲外の値では安定性が損なわれて発光強度が低下する恐れがある。より好ましくは、
0 ≦ c ≦ 0.12
の範囲でもよく、いっそう発光強度が高いようである。
0.001 ≦ d ≦ 0.07
の範囲でもよい。0.001より小さいとM[2]2Si5N8:Euの発光色である600nmから700nmの発光となり易く、760nm以上850nmの範囲の発光とならない恐れがある。0.07より大きいと結晶構造の安定性が損なわれて発光強度が低下する恐れがある。より好ましくは、
0.0019 ≦ d ≦ 0.07
の範囲でもよく、760nm以上850nmの範囲の発光成分が高くなるようである。さらに好ましくは、
0.0019 ≦ d≦ 0.04の範囲でもよい。
0.3 ≦ e ≦ 0.35
の範囲でもよい。この範囲を外れると結晶構造の安定性が損なわれて発光強度が低下する恐れがある。
0 ≦ e ≦ 0.05
の範囲でもよい。酸素は必須の元素ではないが、一般に窒化物原料中に含まれることから材料に取り込まれることもある。この場合において酸素含有量は0.05以下でもよい。この範囲を外れると結晶構造の安定性が損なわれて発光強度が低下する恐れがある。f=0の材料は、特に発光強度が高いようである。
0.5 ≦ g ≦ 0.56
の範囲でもよい。この範囲を外れると結晶構造の安定性が損なわれて発光強度が低下する恐れがある。より好ましくは、
0.53 ≦ g ≦ 0.56
の範囲でもよく、特に発光強度が高いようである。
用いた原料粉末は、比表面積11.2m2/g、酸素含有量1.29重量%、α型含有量95%の窒化ケイ素粉末(宇部興産(株)製SN-E10グレード)、比表面積3.3m2/g、酸素含有量0.82重量%の窒化アルミニウム粉末((株)トクヤマ製のEグレード)、窒化リチウム(純度99%(株)マテリオン製)、窒化ランタン(純度99%(株)マテリオン製)、窒化ユーロピウム(純度99%(株)マテリオン製)、窒化ストロンチウム(純度99%(株)マテリオン製)、窒化バリウム(純度99%(株)マテリオン製)、窒化マグネシウム(純度99%(株)マテリオン製)、窒化カルシウム(純度99%(株)マテリオン製)である。
窒化リチウム、窒化ユーロピウム、窒化マグネシウム、窒化カルシウム、窒化ストロンチウム、窒化バリウム、窒化アルミニウム、窒化ランタン、窒化ケイ素粉末を出発原料として用いた。表5に設計組成の原子比、表6に組成の原子%、表7に組成のパラメータ表記を示す。設計組成に従い、表8に示す割合で、窒化ケイ素製の乳鉢と乳棒を用いて、酸素水分1ppm以下のグローブボックス中で混合し、混合粉末を窒化ホウ素製のるつぼに入れた。るつぼを黒鉛抵抗加熱方式の電気炉にセットした。焼成操作は、まず、拡散ポンプにより焼成雰囲気を真空とし、室温から800℃まで毎時500℃の速度で加熱し、800℃で純度が99.999体積%の窒素を導入して圧力を0.9MPaとし、毎時500℃で1600℃まで昇温し、その温度で2時間保持した。合成した試料を窒化ケイ素製の乳鉢と乳棒を用いて粉末に粉砕し、CuのKα線を用いた粉末X線回折測定(XRD)を行った。その結果、検出された結晶相は、すべて、Eu2Si5N8、Ca2Si5N8、Sr2Si5N8、Ba2Si5N8、のいずれかの結晶と同一の結晶構造を持つ結晶であった。同一の結晶構造とは、回折パターンが同じで格子定数が同一または2%以下のわずかに変化したものである。
図6は、実施例12の粉末の励起および発光スペクトルを示す図である。
図7は、実施例16の粉末の励起および発光スペクトルを示す図である。
図8は、実施例23の粉末の励起および発光スペクトルを示す図である。
表10~表12に示す設計パラメータで、実施例1~37と同様の方法で、比較例1~9の粉末を合成した。
図10は、比較例8の粉末の励起および発光スペクトルを示す図である。
次に、本発明の実施例において、蛍光体を用いて発光装置を製造した。
図11は、本発明の実施例において、発光装置を示す模式図である。
基板実装用チップ型の白色および近赤外発光ダイオードランプ(11)を製作した。可視光線反射率の高い白色のアルミナセラミックス基板(19)に2本のリードワイヤ(12、13)が固定されており、それらワイヤの片端は基板のほぼ中央部に位置し、他端はそれぞれ外部に出ていて電気基板への実装時ははんだづけされる電極となっている。リードワイヤのうち1本(12)は、その片端に、基板中央部となるように発光ピーク波長450nmの青発光ダイオード素子(14)が載置され固定されている。青色発光ダイオード素子(14)の下部電極と下方のリードワイヤとは導電性ペーストによって電気的に接続されており、上部電極ともう1本のリードワイヤ(13)とが金細線(15)によって電気的に接続されている。
12、13.リードワイヤ。
14.発光ダイオード素子。
15.ボンディングワイヤ。
16、18.樹脂。
17.蛍光体。
19.アルミナセラミックス基板。
20.側面部材。
Claims (20)
- 少なくとも、Eu元素と、M[3]元素(M[3]は、Al、Y、LaおよびGdからなる群から選択される少なくとも1種の元素)と、Si元素と、窒素元素を含み、必要に応じて、M[1]元素(M[1]はLi元素)と、M[2]元素(M[2]は、Mg、Ca、BaおよびSrからなる群から選択される少なくとも1種の元素)と、酸素元素とからなる群から選択される少なくとも1種の元素を含む無機物質を含有し、励起源を照射することにより760nm以上850nm以下の範囲の波長に発光ピークの極大値を有する、蛍光体。
- 前記無機物質が、
M[1]aEubM[2]cM[3]dSieOfNg(ただし、a+b+c+d+e+f+g=1)で表される組成であり、パラメータa、b、c、d、e、f、gが、
0 ≦ a ≦ 0.01
0.006 ≦ b ≦ 0.15
0 ≦ c ≦ 0.15
0.001 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
0 ≦ f ≦ 0.05
0.5 ≦ g ≦ 0.56
の数値で表される、請求項1に記載の蛍光体。 - 前記無機物質が、
M[1]aEubM[2]cM[3]dSieOfNg(ただし、a+b+c+d+e+f+g=1)で表される組成であり、パラメータa、b、c、d、e、f、gが、
a = 0
0.006 ≦ b ≦ 0.13
0 ≦ c ≦ 0.12
0.0019 ≦ d ≦ 0.07
0.3 ≦ e ≦ 0.35
f = 0
0.53 ≦ g ≦ 0.56
の数値で表される、請求項2に記載の蛍光体。 - 前記無機物質が、
(Eu,M[2])xM[3]ySi5N8、
ただし、x=2-1.5y、0.1 ≦ y ≦ 0.5、
で表される、請求項1~3のいずれかに記載の蛍光体。 - 前記無機物質が、Eu2Si5N8、Ca2Si5N8、Sr2Si5N8、Ba2Si5N8のいずれかと同一の結晶構造を持つ、請求項1~4のいずれかに記載の蛍光体。
- 前記M[2]元素を含有しない、請求項1~5のいずれかに記載の蛍光体。
- 前記M[3]元素がLa単独である、請求項1~6のいずれかに記載の蛍光体。
- 前記M[3]元素は、少なくともLaを含有し、
前記Laは、0.19原子%以上7原子%以下の範囲で含有される、請求項1~6のいずれかに記載の蛍光体。 - 前記Eu元素は、0.6原子%以上含有される、請求項1~8のいずれかに記載の蛍光体。
- 前記無機物質が、Eu2Si5N8:Laである、請求項1~9のいずれかに記載の蛍光体。
- 前記無機物質が、Sr2Si5N8:Eu,Laである、請求項1~5、7~9のいずれかに記載の蛍光体。
- 前記無機物質が、Ba2Si5N8:Eu,Laである、請求項1~5、7~9のいずれかに記載の蛍光体。
- 前記励起源は、300nm以上600nm以下の範囲の波長の光である、請求項1~12のいずれかに記載の蛍光体。
- 前記励起源が、300nm以上600nm以下の範囲の波長の光であり、前記光を照射した際の630nmの発光強度が、760nm以上850nm以下の範囲の最大値波長の1/2以下であるスペクトル形状を持つ蛍光を発する、請求項1~13のいずれかに記載の蛍光体。
- Eu元素の窒化物または酸化物と、M[3]元素の窒化物または酸化物と、Si元素の窒化物と、必要に応じて、M[1]元素の窒化物または酸化物と、M[2]元素の窒化物または酸化物と、Si元素の酸化物とからなる群から少なくとも1つ選択される原料とを混合し、1400℃以上2200℃以下の温度で焼成する、請求項1~14のいずれかに記載の蛍光体の製造方法。
- 励起源と蛍光体とを備える発光素子であって、
前記励起源は、300nm以上600nm以下の範囲の波長の光を発し、
前記蛍光体は、少なくとも請求項1に記載の蛍光体を含有する、発光素子。 - 前記励起源は、発光ダイオード(LED)またはレーザーダイオード(LD)である、請求項16に記載の発光素子。
- 前記励起源の照射によって、400nm以上760nm未満の範囲の波長に最大値(ピーク)を有する蛍光を発する1以上の別の蛍光体をさらに含む、請求項16または17に記載の発光素子。
- 前記1以上の別の蛍光体のそれぞれは、α-サイアロン:Ce、β-サイアロン:Eu、α-サイアロン:Eu、CaAlSiN3:Ce、および、(Ca,Sr)AlSiN3:Euからなる群から選択される、請求項18に記載の発光素子。
- 520nm以上850nm以下の範囲の波長において、発光強度の最小値が最大値の1/5以上であるスペクトル形状を有する、請求項18または19に記載の発光素子。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20783260.1A EP3950884B1 (en) | 2019-04-03 | 2020-03-16 | Phosphor, method for producing same and light emitting element |
US17/600,575 US11898080B2 (en) | 2019-04-03 | 2020-03-16 | Phosphor, method for producing same and light emitting element |
JP2021511385A JP7251839B2 (ja) | 2019-04-03 | 2020-03-16 | 蛍光体、その製造方法および発光素子 |
CN202080026537.9A CN113646404B (zh) | 2019-04-03 | 2020-03-16 | 荧光体、其制造方法及发光元件 |
KR1020217033120A KR20210141557A (ko) | 2019-04-03 | 2020-03-16 | 형광체, 그 제조 방법 및 발광 소자 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019071465 | 2019-04-03 | ||
JP2019-071465 | 2019-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020203234A1 true WO2020203234A1 (ja) | 2020-10-08 |
Family
ID=72668707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/011567 WO2020203234A1 (ja) | 2019-04-03 | 2020-03-16 | 蛍光体、その製造方法および発光素子 |
Country Status (7)
Country | Link |
---|---|
US (1) | US11898080B2 (ja) |
EP (1) | EP3950884B1 (ja) |
JP (1) | JP7251839B2 (ja) |
KR (1) | KR20210141557A (ja) |
CN (1) | CN113646404B (ja) |
TW (1) | TWI822983B (ja) |
WO (1) | WO2020203234A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230145138A (ko) | 2021-03-02 | 2023-10-17 | 덴카 주식회사 | 형광체 분말, 파장 변환체 및 발광 장치 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1104799A1 (en) | 1999-11-30 | 2001-06-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Red emitting luminescent material |
WO2005019376A1 (ja) | 2003-08-22 | 2005-03-03 | National Institute For Materials Science | 酸窒化物蛍光体と発光器具 |
JP3837588B2 (ja) | 2003-11-26 | 2006-10-25 | 独立行政法人物質・材料研究機構 | 蛍光体と蛍光体を用いた発光器具 |
JP3837551B2 (ja) | 2003-06-20 | 2006-10-25 | 独立行政法人物質・材料研究機構 | 酸窒化物蛍光体 |
JP3921545B2 (ja) | 2004-03-12 | 2007-05-30 | 独立行政法人物質・材料研究機構 | 蛍光体とその製造方法 |
WO2014068907A1 (ja) * | 2012-10-30 | 2014-05-08 | パナソニック株式会社 | 蛍光体、波長変換部材及び発光装置 |
CN108467733A (zh) * | 2018-04-08 | 2018-08-31 | 有研稀土新材料股份有限公司 | 一种近红外荧光粉、其制备方法及含该荧光粉的发光装置 |
CN108630794A (zh) * | 2017-03-22 | 2018-10-09 | 江苏博睿光电有限公司 | 一种白光发光装置 |
CN109135747A (zh) * | 2018-02-12 | 2019-01-04 | 有研稀土新材料股份有限公司 | 一种氮化物发光材料及包含其的发光装置 |
CN109370587A (zh) * | 2018-09-06 | 2019-02-22 | 旭宇光电(深圳)股份有限公司 | 氮化物近红外荧光材料、含有氮化物近红外荧光材料的发光装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG173925A1 (en) * | 2002-03-22 | 2011-09-29 | Nichia Corp | Nitride phosphor and production process thereof, and light emitting device |
KR100865624B1 (ko) * | 2004-04-27 | 2008-10-27 | 파나소닉 주식회사 | 형광체 조성물과 그 제조 방법, 및 그 형광체 조성물을이용한 발광 장치 |
WO2007088966A1 (ja) * | 2006-02-02 | 2007-08-09 | Mitsubishi Chemical Corporation | 複合酸窒化物蛍光体、それを用いた発光装置、画像表示装置、照明装置及び蛍光体含有組成物、並びに、複合酸窒化物 |
CN102899038A (zh) * | 2012-10-30 | 2013-01-30 | 江苏博睿光电有限公司 | 一种氮化物红色荧光粉及其制备方法 |
-
2020
- 2020-03-16 EP EP20783260.1A patent/EP3950884B1/en active Active
- 2020-03-16 KR KR1020217033120A patent/KR20210141557A/ko not_active Application Discontinuation
- 2020-03-16 CN CN202080026537.9A patent/CN113646404B/zh active Active
- 2020-03-16 WO PCT/JP2020/011567 patent/WO2020203234A1/ja unknown
- 2020-03-16 US US17/600,575 patent/US11898080B2/en active Active
- 2020-03-16 JP JP2021511385A patent/JP7251839B2/ja active Active
- 2020-03-27 TW TW109110558A patent/TWI822983B/zh active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1104799A1 (en) | 1999-11-30 | 2001-06-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Red emitting luminescent material |
JP3837551B2 (ja) | 2003-06-20 | 2006-10-25 | 独立行政法人物質・材料研究機構 | 酸窒化物蛍光体 |
WO2005019376A1 (ja) | 2003-08-22 | 2005-03-03 | National Institute For Materials Science | 酸窒化物蛍光体と発光器具 |
JP3837588B2 (ja) | 2003-11-26 | 2006-10-25 | 独立行政法人物質・材料研究機構 | 蛍光体と蛍光体を用いた発光器具 |
JP3921545B2 (ja) | 2004-03-12 | 2007-05-30 | 独立行政法人物質・材料研究機構 | 蛍光体とその製造方法 |
WO2014068907A1 (ja) * | 2012-10-30 | 2014-05-08 | パナソニック株式会社 | 蛍光体、波長変換部材及び発光装置 |
CN108630794A (zh) * | 2017-03-22 | 2018-10-09 | 江苏博睿光电有限公司 | 一种白光发光装置 |
CN109135747A (zh) * | 2018-02-12 | 2019-01-04 | 有研稀土新材料股份有限公司 | 一种氮化物发光材料及包含其的发光装置 |
CN108467733A (zh) * | 2018-04-08 | 2018-08-31 | 有研稀土新材料股份有限公司 | 一种近红外荧光粉、其制备方法及含该荧光粉的发光装置 |
CN109370587A (zh) * | 2018-09-06 | 2019-02-22 | 旭宇光电(深圳)股份有限公司 | 氮化物近红外荧光材料、含有氮化物近红外荧光材料的发光装置 |
Non-Patent Citations (3)
Title |
---|
KREVEL, VAN, J. W. H.: "Ph.D. thesis", 2000, TECHNISCHE UNIVERSITEIT EINDHOVEN, article "On new rare-earth doped M-Si-Al-O-N materials : luminescence properties and oxidation resistance" |
See also references of EP3950884A4 |
Y. Q. LIG. DE WITHH. T. HINTZEN: "Journal of Luminescence", vol. 116, 2006, ELSEVIER, article "Luminescence properties of Ce3+-activated alkaline earth silicon nitride M Si N (M=Ca, Sr, Ba) materials", pages: 107 - 116 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230145138A (ko) | 2021-03-02 | 2023-10-17 | 덴카 주식회사 | 형광체 분말, 파장 변환체 및 발광 장치 |
DE112022000806T5 (de) | 2021-03-02 | 2023-11-09 | Denka Company Limited | Leuchtstoffpulver, Wellenlängenumwandlungskörper und lichtemittierende Vorrichtung |
Also Published As
Publication number | Publication date |
---|---|
KR20210141557A (ko) | 2021-11-23 |
US20220177780A1 (en) | 2022-06-09 |
EP3950884A4 (en) | 2022-05-11 |
US11898080B2 (en) | 2024-02-13 |
JP7251839B2 (ja) | 2023-04-04 |
EP3950884A1 (en) | 2022-02-09 |
CN113646404B (zh) | 2024-03-22 |
JPWO2020203234A1 (ja) | 2020-10-08 |
TWI822983B (zh) | 2023-11-21 |
CN113646404A (zh) | 2021-11-12 |
TW202104548A (zh) | 2021-02-01 |
EP3950884B1 (en) | 2022-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5145534B2 (ja) | 蛍光体とその製造方法および照明器具 | |
JP5110518B2 (ja) | 蛍光体とその製造方法および照明器具 | |
JP5847908B2 (ja) | オキシ炭窒化物蛍光体およびこれを使用する発光素子 | |
KR101168178B1 (ko) | 형광체와 그 제조방법 및 발광기구 | |
JP5105347B2 (ja) | 蛍光体とその製造方法および発光器具 | |
JP2006213910A (ja) | 酸窒化物蛍光体及び発光装置 | |
WO2020261691A1 (ja) | 蛍光体、その製造方法および発光装置 | |
TW201422773A (zh) | 螢光體、發光元件及照明裝置 | |
WO2015080062A1 (ja) | 蛍光体、発光装置、画像表示装置、顔料および紫外線吸収剤 | |
WO2020203234A1 (ja) | 蛍光体、その製造方法および発光素子 | |
JP6950934B2 (ja) | 蛍光体、その製造方法、および、それを用いた発光素子 | |
JP4234161B2 (ja) | 発光素子及び照明器具 | |
KR20220013389A (ko) | α형 사이알론 형광체, 발광 부재 및 발광 장치 | |
WO2023145774A1 (ja) | 蛍光体、その製造方法、および、発光デバイス | |
JP6099089B2 (ja) | 酸窒化物蛍光体と発光器具 | |
KR20230034287A (ko) | 형광체, 파장 변환체 및 발광 장치 | |
JP2008266385A (ja) | 蛍光体及びその製造方法、並びにそれを用いた発光装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20783260 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021511385 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20217033120 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2020783260 Country of ref document: EP Effective date: 20211103 |