WO2008110976A2 - Illumination system comprising a compound with low thermal expansion coefficient - Google Patents
Illumination system comprising a compound with low thermal expansion coefficient Download PDFInfo
- Publication number
- WO2008110976A2 WO2008110976A2 PCT/IB2008/050858 IB2008050858W WO2008110976A2 WO 2008110976 A2 WO2008110976 A2 WO 2008110976A2 IB 2008050858 W IB2008050858 W IB 2008050858W WO 2008110976 A2 WO2008110976 A2 WO 2008110976A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- systems
- illumination system
- mixtures
- group
- selected out
- Prior art date
Links
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
- C09K11/7783—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
- C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/447—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on phosphates, e.g. hydroxyapatite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/472—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on lead titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
-
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
- C04B2235/3203—Lithium oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3229—Cerium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3256—Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3258—Tungsten oxides, tungstates, or oxide-forming salts thereof
- C04B2235/326—Tungstates, e.g. scheelite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/76—Crystal structural characteristics, e.g. symmetry
- C04B2235/762—Cubic symmetry, e.g. beta-SiC
- C04B2235/764—Garnet structure A3B2(CO4)3
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9646—Optical properties
- C04B2235/9653—Translucent or transparent ceramics other than alumina
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- 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
-
- 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
- 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
- H01L33/52—Encapsulations
- H01L33/54—Encapsulations having a particular shape
Definitions
- the present invention is directed to novel materials for light emitting devices, especially to the field of novel materials for LEDs
- Phosphor converted light emitting diodes are based on a blue or UV light emitting die, which is usually made out of (AlInGa)N and at least one luminescent layer, which is usually deposited onto the chip as a silicone suspension.
- a blue-emitting (In 5 Ga)N LEDs are converted into white light emitting LEDs either by a yellow-orange phosphor (e.g. YAG:Ce) or by a two component phosphor blend, containing a yellow- and a red- emitting one.
- an illumination system which is at least partly able to overcome the above-mentioned drawbacks and is especially usable within a wide range of applications and especially allows the fabrication and/or setup of highly reliable phosphor converted LEDs.
- This object is solved by an illumination system according to claim 1 of the present invention.
- an illumination system, especially a LED is provided comprising a composite material with a thermal expansion coefficient ⁇ of > -2* 10 ⁇ 6 / K and ⁇ 2* 10 ⁇ 6 / K.
- a material has shown for a wide range of applications within the present invention to have at least one of the following advantages:
- the operational lifetime of the LED can be greatly increased for a wide range of applications within the invention due to the lesser (smaller) probability of cracking and/or stress within the composite material.
- the LED may be made more compact for a wide range of applications within the present invention
- the contact between the luminescent materials in the LED may be increased.
- an illumination system according to the present invention may have several build-ups which may be used simultaneously and/or alternatively and each represent preferred embodiments of the present invention:
- the composite material may be placed on the blue-emitting die and further phosphor materials (such as, but not limited to yellow-orange phosphors, red-emitting phosphors and the like) may be embedded inside the composite material.
- phosphor materials such as, but not limited to yellow-orange phosphors, red-emitting phosphors and the like
- One or more materials within the composite material may also serve as luminescent materials so that at least some (or some part) of the phosphor materials may be omitted.
- the composite material may be present in a matrix-, gel- and/or glass-like form surrounding and/or covering the blue-emitting die; however according to an alternative embodiment of the present invention, the composite material may also be present in form of a solid, e.g. a ceramic.
- the illumination system comprises a composite material with a thermal expansion coefficient ⁇ of ⁇ -1* 10 ⁇ 6 / K and ⁇ l* 10 ⁇ 6 / K, more preferred > -0.5* 10 ⁇ 6 / K and ⁇ 0.5* 10 "6 / K This has been shown to lead to a material with further improved features for a wide range of application within the present invention.
- the composite material comprises at least one first material with a thermal expansion coefficient ⁇ of ⁇ 0* 10 "6 / K.
- the first material is an oxidic material.
- the first material has a band gap of > 2.75 eV.
- the first material has a Debye-Temperature of > 500 K and ⁇ 2000 K
- the first material has a Debye-Temperature of > 700 K and ⁇ 1700 K, more preferred > 1000 K and ⁇ 1500 K.
- the first material comprises a material selected out of the group comprising
- M 2 W3- x Mo x Oi2 with M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x >0 and ⁇ 3 AMW2- ⁇ Mo x Og, with A selected out of the group comprising Li, Na, K, Rb,
- Cs or mixtures thereof M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x >0 and ⁇ 2
- XYMWi - x Mo x O 8 with X selected out of the group comprising Ca, Sr, Ba or mixtures thereof, Y selected out of the group comprising Nb, Ta or mixtures thereof and M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x ⁇ O and ⁇ l.
- AIPO4-I7 (which is a zeolite e.g. described in Chem. Mater., 10 (7), 2013 - 2019, 1998, which is fully incorporated by reference) or mixtures thereof. These materials have proven themselves in practice for a wide range of applications within the present invention.
- the first material comprises a luminescent material, which is capable of absorbing at least partly in the UV or blue- emitting wavelength region and emit visible light in a wavelength region between > 420 and ⁇ 800 nm.
- the first material comprises a luminescent material selected out of the group:
- M 2 W3- ⁇ Mo x Oi 2 :RE with M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof, x > 0 and ⁇ 3 and RE selected out of the group comprising Eu, Pr, Sm, Dy or mixtures thereof
- AMW 2 - ⁇ Mo x Og:RE with A selected out of the group comprising Li, Na, K, Rb, Cs or mixtures thereof M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof, x > 0 and ⁇ 2 and RE selected out of the group comprising Eu, Pr, Sm, Dy or mixtures thereof
- XYMWi - x Mo x Og :RE with X selected out of the group comprising Ca, Sr, Ba or mixtures thereof, Y selected out of the group comprising Nb, Ta or mixtures thereof and M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof x > 0 and ⁇ 1 and RE selected out of the group comprising Eu, Pr, Sm, Dy or mixtures thereof. or mixtures thereof.
- the doping level is ⁇ O.OOl % and ⁇ 100%, preferably ⁇ 25%. This has been shown to lead to a material with further improved lighting features for a wide range of application within the present invention.
- the doping level is >0.1% and ⁇ 10% , more preferred >1% and ⁇ 5%.
- the at least first material is provided as a powder.
- the at least first material is provided at least partially as a powder, it is especially preferred that the powder has a dso of >2.5 ⁇ m and ⁇ 25, preferably ⁇ 15 ⁇ m. This has been shown to be advantageous for a wide range of applications within the present invention.
- the composite material comprises at least one second matrix material selected out of the group comprising silicone, glass, polymers, resins or mixtures thereof.
- the ratio of the first material : the second material is > 0.1 :1 and ⁇ 10:1, preferably > 0.3: 1 and ⁇ 3 : 1.
- the illumination system includes a blue-emitting die whereby the thermal expansion coefficient of the composite material is matched with the thermal expansion coefficient of the blue-emitting die.
- the term "matched" especially includes that the blue-emitting die and the composite material have essentially the same thermal expansion coefficient and/or that the thermal expansion coefficient of the blue-emitting die and the composite material differ by ⁇ 10%, preferably ⁇ 5%. By doing so, the two components may be in very close contact for a wide range of applications within the present invention, leading to excellent cooling of the LED die, which in turn allows large operation currents.
- the term "matched" especially includes that the composite material has a negative thermal expansion coefficient, however the thermal expansion coefficient of the blue-emitting die and the composite material have essentially the same absolute value or differ by ⁇ 10%, preferably ⁇ 5%. By doing so, the expansion of the die would be "compensated" by the composite material, which allows for a wide range of applications within the present invention to build a more compact illumination system.
- the present invention furthermore relates to an illumination system, especially a LED, comprising at least one material with a thermal expansion coefficient ⁇ ⁇ 6* 10 "6 / K.
- the operational lifetime of the LED can be greatly increased for a wide range of applications within the invention due to the lesser probability of cracking and/or stress within the composite material. Due to the lesser thermal expansion, the LED may be made more compact for a wide range of applications within the present invention.
- the thermal expansion coefficient of said material is chosen as to at least partly counterbalance the thermal expansion of the blue-emitting die.
- the optical contact between the luminescent materials in the LED may be increased.
- the LED is mounted and/or provided on a board or board-like structure it is for a wide range of applications especially possible that the thermal expansion of the LED together with said first material is matched to the thermal expansion of the board, which is actually a preferred embodiment of the present invention.
- the illumination system comprises at least one material with a thermal expansion coefficient ⁇ ⁇ 4* 10 "6 / K, preferably ⁇ ⁇ 2* 10 ⁇ 6 / K and most preferred ⁇ ⁇ 0* 10 ⁇ 6 / K.
- said material is an oxidic material.
- said material has a band gap of > 2.75 eV.
- said material has a Debye-Temperature of > 500 K and ⁇ 2000 K. This has been shown to lead to a material with further improved features for a wide range of application within the present invention.
- the said material has a Debye-Temperature of > 700 K and ⁇ 1700 K, more preferred > 1000 K and ⁇ 1500 K.
- said material comprises a material selected out of the group comprising
- M 2 W 3 -XMo x Oi2 with M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x >0 and ⁇ 3 AMW 2 -XMo x O 8 , with A selected out of the group comprising Li, Na, K, Rb, Cs or mixtures thereof M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x > 0 and ⁇ 2
- XYMWi- x Mo x Og with X selected out of the group comprising Ca, Sr, Ba or mixtures thereof, Y selected out of the group comprising Nb, Ta or mixtures thereof and M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof and x > 0 and ⁇ 1.
- said material comprises a luminescent material, which is capable of absorbing at least partly in the UV or blue- emitting wavelength region and emit visible light in a wavelength region between >420 nm and ⁇ 800Y.
- said material comprises a luminescent material selected out of the group:
- M 2 W 3 _ ⁇ Mo x Oi 2 :RE with M selected out of the group Sc, La, Y, rare earth metals or mixtures thereof, x >0 and ⁇ 3 and RE selected out of the group comprising Eu, Pr, Sm, Dy or mixtures thereof
- Ba or mixtures thereof Y selected out of the group comprising Nb, Ta or mixtures thereof and M selected out of the group Sc, Y, La, Gd, Lu rare earth metals or mixtures thereof, x >0 and ⁇ 1 and RE selected out of the group comprising Eu, Pr, Sm, Dy or mixtures thereof or mixtures thereof.
- the doping level is > 0.001% and ⁇ 100% , preferably ⁇ 25%.
- the doping level is > 0.1% and ⁇ 10%, more preferred > 1% and ⁇ 5%.
- the illumination system includes a blue-emitting die whereby the thermal expansion coefficient of the material is matched with the thermal expansion coefficient of the blue- emitting die.
- matched especially includes that the blue-emitting die and the material have essentially the same thermal expansion coefficient and/or that the thermal expansion coefficient of the blue-emitting die and the material differ by ⁇ 10%, preferably ⁇ 5%. By doing so, the two components may be in very close contact for a wide range of applications within the present invention, leading to excellent cooling of the LED die, which in turn allows large operation currents
- the term "matched” especially includes that the composite material has a negative thermal expansion coefficient, however the thermal expansion coefficient of the blue-emitting die and the said material have essentially the same absolute value or differ by ⁇ 10%, preferably ⁇ 5%. By doing so, the expansion of the die would be "compensated" by the said material, which allows for a wide range of applications within the present invention to build a more compact illumination system.
- the at least one material is provided as powder and/or as ceramic material.
- the at least one material is provided at least partially as a powder, it is especially preferred that the powder has a d 5 o of > 5 ⁇ m and ⁇ 25 ⁇ m, preferably ⁇ 15 ⁇ m. This has been shown to be advantageous for a wide range of applications within the present invention.
- the at least one material is at least partly provided as at least one ceramic material.
- ceramic material in the sense of the present invention means and/or includes especially a crystalline or polycrystalline compact material or composite material with a controlled amount of pores or which is pore free.
- polycrystalline material in the sense of the present invention means and/or includes especially a material with a volume density larger than 90% of the main constituent, consisting of more than 80% of single crystal domains, with each domain being larger than 0.5 ⁇ m in diameter and having different crystallographic orientations.
- the single crystal domains may be connected by amorphous or glassy material or by additional crystalline constituents.
- the at least one material has a density of > 90% and ⁇ 100% of the theoretical density. This has been shown to be advantageous for a wide range of applications within the present invention since then the luminescent properties of the at least one ceramic material may be increased.
- the at least one ceramic material has a density of > 97% and ⁇ 100% of the theoretical density, yet more preferred > 98% and ⁇ 100%, even more preferred >98.5% and ⁇ 100% and most preferred > 99.0% and ⁇ 100%.
- the surface roughness RMS (disruption of the planarity of a surface; measured as the geometric mean of the difference between highest and deepest surface features) of the surface(s) of the at least one ceramic material is > 0.001 ⁇ m and ⁇ 1 ⁇ m.
- the surface roughness of the surface(s) of the at least one ceramic material is >0.005 ⁇ m and ⁇ 0.8 ⁇ m, according to an embodiment of the present invention >0.01 ⁇ m and ⁇ 0.5 ⁇ m, according to an embodiment of the present invention >0.02 ⁇ m and ⁇ 0.2 ⁇ m. and according to an embodiment of the present invention >0.03 ⁇ m and ⁇ 0.15 ⁇ m.
- the specific surface area of the at least one ceramic material is >10 "7 m 2 /g and ⁇ 0.1 m 2 /g.
- An illumination system according to the present invention may be of use in a broad variety of systems and/or applications, amongst them one or more of the following: Office lighting systems
- Fig. 1 shows a schematic partial side view of a structure of a LED according to a first embodiment of the present invention
- Fig. 2 shows a schematic partial side view of a structure of a LED according to a first embodiment of the present invention
- Fig.3 shows a schematic partial side view of a structure of a LED according to a third embodiment of the present invention
- Fig.4 shows an emission spectrum of an LED according to Example I of the present invention.
- Fig. 1 shows a schematic partial side view of a structure of a LED according to a first embodiment of the present invention
- a LED 1 comprises a LED body 60, in which a mirror 40 is inserted.
- a blue-emitting die 20 e.g. consisting out of InGaN or any other suitable material
- a composite material which comprises a first material 10a which has a low or negative thermal expansion coefficient (as described above) embedded in a second material 10b, which may be made out of silicone, PMMA etc.
- the first material 10a is furthermore luminescent and therefore serves to convert part of the light emitted by the die 20 in order to achieve a warm- white LED.
- the first material 10a may to this end not be uniform but comprise itself several materials (as described above).
- Fig. 2 shows a schematic partial side view of a structure of a LED according to a second embodiment of the present invention.
- This embodiment differs from that of Fig. 1 that the first material 10a is not luminescent, but rather a converting phosphor 30 is furthermore present.
- This phosphor material 30 may be chosen from any material known in the field. It is apparent that this phosphor material 30 does not need to be uniform, also several materials may be present in the matrix 10b.
- Fig. 3 shows a schematic partial side view of a structure of a LED according to a third embodiment of the present invention.
- the die 20 is surrounded by a material 10 with a low thermal expansion coefficient, as described above.
- the two components can be in very close contact, leading to excellent cooling of the LED die, which in turn allows large operation currents.
- a LED was made comprising a die, that is surrounded by a ceramic composite material with a thermal expansion coefficient close to zero.
- the composite is composed out of a Cerium doped garnet, i.e. (Y,Gd,Lu) 3 Al 5 Oi 2 :Ce,Pr and out of a Europium doped tungstate or molybdate, i.e. LiLaW 2 O 8 :Eu.
- the spectrum of the LED is shown in figure 4.
- the particular combinations of elements and features in the above detailed embodiments are exemplary only; the interchanging and substitution of these teachings with other teachings in this and the patents/applications incorporated by reference are also expressly contemplated.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009553252A JP2010521805A (en) | 2007-03-12 | 2008-03-10 | Illumination system comprising a compound having a low coefficient of thermal expansion |
CN2008800082574A CN101632181B (en) | 2007-03-12 | 2008-03-10 | Illumination system comprising a compound with low thermal expansion coefficient |
EP08719619A EP2122694A2 (en) | 2007-03-12 | 2008-03-10 | Illumination system comprising a compound with low thermal expansion coefficient |
BRPI0808819-5A BRPI0808819A2 (en) | 2007-03-12 | 2008-03-10 | LIGHTING SYSTEM AND UNDERSTANDING SYSTEM |
US12/530,628 US20100181585A1 (en) | 2007-03-12 | 2008-03-10 | Illumination system comprising a compound with low thermal expansion coefficient |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07103962.2 | 2007-03-12 | ||
EP07103962 | 2007-03-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008110976A2 true WO2008110976A2 (en) | 2008-09-18 |
WO2008110976A3 WO2008110976A3 (en) | 2008-11-06 |
Family
ID=39540686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2008/050858 WO2008110976A2 (en) | 2007-03-12 | 2008-03-10 | Illumination system comprising a compound with low thermal expansion coefficient |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100181585A1 (en) |
EP (1) | EP2122694A2 (en) |
JP (1) | JP2010521805A (en) |
CN (1) | CN101632181B (en) |
BR (1) | BRPI0808819A2 (en) |
WO (1) | WO2008110976A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2550753C2 (en) * | 2009-11-23 | 2015-05-10 | Конинклейке Филипс Электроникс Н.В. | Semiconductor led with wavelength conversion |
US9567519B2 (en) | 2012-03-29 | 2017-02-14 | Merck Patent Gmbh | Composite ceramic which comprises a conversion phosphor and a material having a negative coefficient of thermal expansion |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8074748B1 (en) | 2009-02-20 | 2011-12-13 | Us Synthetic Corporation | Thermally-stable polycrystalline diamond element and compact, and applications therefor such as drill bits |
TWI464235B (en) | 2012-11-21 | 2014-12-11 | Lextar Electronics Corp | Phosphor composition and light emitting diode device using the same |
CN103497769B (en) * | 2013-10-17 | 2015-04-22 | 苏州德捷膜材料科技有限公司 | Red phosphor adaptable to ultraviolet light or blue light excitation and preparation method thereof |
JP6273463B2 (en) | 2013-12-03 | 2018-02-07 | パナソニックIpマネジメント株式会社 | Phosphor material and light emitting device |
KR20170040201A (en) * | 2014-07-28 | 2017-04-12 | 스미또모 가가꾸 가부시키가이샤 | Method for producing semiconductor light-emitting device |
EP3313960B1 (en) * | 2015-06-24 | 2019-10-23 | Seaborough IP I B.V. | Phosphor ceramic |
JP2018527760A (en) | 2015-08-26 | 2018-09-20 | シン サーマル エクスチェンジ ピーティーイー エルティーディー | Vacuum core circuit board |
US20200161506A1 (en) * | 2018-11-21 | 2020-05-21 | Osram Opto Semiconductors Gmbh | Method for Producing a Ceramic Converter Element, Ceramic Converter Element, and Optoelectronic Component |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030174994A1 (en) * | 2002-02-19 | 2003-09-18 | Garito Anthony F. | Thermal polymer nanocomposites |
US20050173708A1 (en) * | 2004-02-06 | 2005-08-11 | Toyoda Gosei Co., Ltd. | Light emitting device and sealing material |
US20060049421A1 (en) * | 2004-09-09 | 2006-03-09 | Toyoda Gosei Co., Ltd. | Solid-state optical device |
US20070012887A1 (en) * | 2005-06-30 | 2007-01-18 | Martin Letz | Solid-state light source |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3533965A (en) * | 1966-09-13 | 1970-10-13 | Nippon Electric Co | Low expansion material |
US5322559A (en) * | 1993-05-11 | 1994-06-21 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Negative thermal expansion material |
US5919720A (en) * | 1997-04-15 | 1999-07-06 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Materials with low or negative thermal expansion |
CA2394645A1 (en) * | 1999-06-11 | 2000-12-21 | Sydney Hyman | Image making medium |
US20040214377A1 (en) * | 2003-04-28 | 2004-10-28 | Starkovich John A. | Low thermal expansion adhesives and encapsulants for cryogenic and high power density electronic and photonic device assembly and packaging |
US7745832B2 (en) * | 2004-09-24 | 2010-06-29 | Epistar Corporation | Semiconductor light-emitting element assembly with a composite substrate |
-
2008
- 2008-03-10 BR BRPI0808819-5A patent/BRPI0808819A2/en not_active IP Right Cessation
- 2008-03-10 JP JP2009553252A patent/JP2010521805A/en active Pending
- 2008-03-10 CN CN2008800082574A patent/CN101632181B/en not_active Expired - Fee Related
- 2008-03-10 WO PCT/IB2008/050858 patent/WO2008110976A2/en active Application Filing
- 2008-03-10 US US12/530,628 patent/US20100181585A1/en not_active Abandoned
- 2008-03-10 EP EP08719619A patent/EP2122694A2/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030174994A1 (en) * | 2002-02-19 | 2003-09-18 | Garito Anthony F. | Thermal polymer nanocomposites |
US20050173708A1 (en) * | 2004-02-06 | 2005-08-11 | Toyoda Gosei Co., Ltd. | Light emitting device and sealing material |
US20060049421A1 (en) * | 2004-09-09 | 2006-03-09 | Toyoda Gosei Co., Ltd. | Solid-state optical device |
US20070012887A1 (en) * | 2005-06-30 | 2007-01-18 | Martin Letz | Solid-state light source |
Non-Patent Citations (4)
Title |
---|
EVANS J S O ET AL: "Negative thermal expansion in a large molybdate and tungstate family" JOURNAL OF SOLID STATE CHEMISTRY ACADEMIC PRESS USA, vol. 133, no. 2, 1 November 1997 (1997-11-01), pages 580-583, XP002494114 ISSN: 0022-4596 * |
LAUGHLIN R B: "Optical absorption edge of SiO2" PHYSICAL REVIEW B (CONDENSED MATTER) USA, vol. 22, no. 6, 15 September 1980 (1980-09-15), pages 3021-3029, XP002494112 ISSN: 0163-1829 * |
PIEKARCZYK W: "Crystal growth of CVD diamond and some of its peculiarities" CRYSTAL RESEARCH AND TECHNOLOGY WILEY-VCH VERLAG BERLIN GMBH GERMANY, vol. 34, no. 5-6, 1999, pages 553-563, XP002494113 ISSN: 0232-1300 * |
ZWEBEN C H: "New material options for light-emitting diode packaging" PROCEEDINGS OF THE SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE-INT. SOC. OPT. ENG USA, vol. 5366, no. 1, 2004, pages 173-182, XP002494111 ISSN: 0277-786X * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2550753C2 (en) * | 2009-11-23 | 2015-05-10 | Конинклейке Филипс Электроникс Н.В. | Semiconductor led with wavelength conversion |
US9567519B2 (en) | 2012-03-29 | 2017-02-14 | Merck Patent Gmbh | Composite ceramic which comprises a conversion phosphor and a material having a negative coefficient of thermal expansion |
Also Published As
Publication number | Publication date |
---|---|
CN101632181B (en) | 2011-04-20 |
WO2008110976A3 (en) | 2008-11-06 |
BRPI0808819A2 (en) | 2014-08-19 |
CN101632181A (en) | 2010-01-20 |
EP2122694A2 (en) | 2009-11-25 |
JP2010521805A (en) | 2010-06-24 |
US20100181585A1 (en) | 2010-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20100181585A1 (en) | Illumination system comprising a compound with low thermal expansion coefficient | |
JP5575488B2 (en) | Illumination system including a synthetic monolithic ceramic luminescence converter | |
EP1948757B1 (en) | Light emitting device with an improved caalsin light converting material | |
JP4911578B2 (en) | Oxynitride phosphor and light emitting device | |
US9966512B2 (en) | Light scattering and conversion plate for LEDs | |
KR101399652B1 (en) | Silicate phosphor and white light emitting device including silicate phosphor | |
US20100012964A1 (en) | Illumination system comprising monolithic ceramic luminescence converter | |
TWI594969B (en) | Composite ceramic | |
JP2008538652A (en) | Lighting system including ceramic luminescence converter | |
JP2008537002A (en) | Lighting system consisting of a ceramic luminescence converter that emits red light | |
JP2006232868A (en) | Acid nitride phosphor and semiconductor light emitting device | |
CN107801399B (en) | Phosphor ceramic | |
US9647180B2 (en) | Glass-phosphor composite containing rare-earth ion and light-emitting diode including same | |
JP4908071B2 (en) | Oxynitride phosphor and light emitting device | |
JP2007231105A (en) | Phosphor, fluorescent film, light emitting device, and manufacturing method of phosphor | |
JP2008013674A (en) | Wavelength conversion material, its manufacturing method, and light emitting device using it | |
WO2022244523A1 (en) | Phosphor, method for producing same, light emitting element and light emitting device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200880008257.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08719619 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008719619 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009553252 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12530628 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: PI0808819 Country of ref document: BR Kind code of ref document: A2 Effective date: 20090910 |