EP2491094A1 - Sm-aktivierte aluminat- und borat-leuchtstoffe - Google Patents
Sm-aktivierte aluminat- und borat-leuchtstoffeInfo
- Publication number
- EP2491094A1 EP2491094A1 EP10759816A EP10759816A EP2491094A1 EP 2491094 A1 EP2491094 A1 EP 2491094A1 EP 10759816 A EP10759816 A EP 10759816A EP 10759816 A EP10759816 A EP 10759816A EP 2491094 A1 EP2491094 A1 EP 2491094A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phosphor
- samarium
- light source
- lighting unit
- zno
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 150000004645 aluminates Chemical class 0.000 title description 4
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical class [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 title description 2
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 8
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 75
- 238000000034 method Methods 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 15
- 229910052772 Samarium Inorganic materials 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 10
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 7
- 239000002105 nanoparticle Substances 0.000 claims description 7
- 239000012190 activator Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229920002050 silicone resin Polymers 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 229910002601 GaN Inorganic materials 0.000 claims description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 description 14
- 239000010410 layer Substances 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 229910052681 coesite Inorganic materials 0.000 description 6
- 229910052906 cristobalite Inorganic materials 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- -1 lanthanum magnesium aluminate compound Chemical class 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 229910052682 stishovite Inorganic materials 0.000 description 6
- 229910052905 tridymite Inorganic materials 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 229910052593 corundum Inorganic materials 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 229910052693 Europium Inorganic materials 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 150000001642 boronic acid derivatives Chemical class 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910003668 SrAl Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000695 excitation spectrum Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000462 isostatic pressing Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 238000005118 spray pyrolysis Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 206010001497 Agitation Diseases 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 150000000994 L-ascorbates Chemical class 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 125000005595 acetylacetonate group Chemical group 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- AUCDRFABNLOFRE-UHFFFAOYSA-N alumane;indium Chemical compound [AlH3].[In] AUCDRFABNLOFRE-UHFFFAOYSA-N 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005049 combustion synthesis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000001912 cyanamides Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- VZCYOOQTPOCHFL-OWOJBTEDSA-L fumarate(2-) Chemical class [O-]C(=O)\C=C\C([O-])=O VZCYOOQTPOCHFL-OWOJBTEDSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 150000002690 malonic acid derivatives Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 238000007704 wet chemistry method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7767—Chalcogenides
- C09K11/7768—Chalcogenides with alkaline 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
- C09K11/62—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing gallium, indium or thallium
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
Definitions
- the invention relates to phosphors which consist of Sm-activated aluminates and borates, their preparation and their use as LED conversion phosphors for near UV LEDs.
- fluorescent converted LEDs have been developed for general and special lighting (displays, signals, flash lights), with the vast majority of manufacturers relying on the use of blue-emitting InGaN LEDs. This is due to the fact that when using blue LEDs (420-480 nm) the Stokes loss is minimized by the conversion of the blue semiconductor radiation into a white spectrum and thus the highest lumen efficiencies can be achieved.
- the theoretical limit for a white light source with a color rendition above 80 is about 350 Im / W, and recently the company Nichia has developed a white LED with almost 250 Im / W. This LED is based on a YAG: Ce-converted InGaN semiconductor that emits in the blue spectral range.
- T c 5000 - 8000 K.
- the supply of warm-white LEDs succeeds by the addition of a second phosphor in the red
- Phosphors namely CaS: Eu, CaAISiN 3 : Eu and CaaSisNeiEu are all based on the activator Eu 2+ , which is characterized both by a broad
- red-emitting line emitters as converters in warm-white LEDs is of great interest, as it causes the
- JP-2000144129 describes a codoped SrAl 4 O 7 : Eu, Sm.
- the object of the present invention is therefore to produce novel Sm-activated phosphors which are the above-mentioned. Meet requirements for high light efficiency and use especially in near UV LEDs.
- Ln Y, La and / or Lu
- Phosphors are only suitable for near UV LEDs.
- Sm 2+ is isoelectronic with Eu 3+ , making the term scheme almost identical to that of Eu 3+ , ie only the splitting of the energy levels is reduced due to the lower ionic charge and thus lower Stark splitting.
- Sm 2+ -doped luminescent materials show through 5 D 0 - 7.
- Fj transitions emission lines caused between 10,000 and 15000 cm “1 and are therefore suitable as NIR emitters.
- the low position of the highly absorbent 4f5d band also allows excitation in the visible spectral range, including by blue emitting LEDs.
- the atomic concentrations of the Sm-doping are between 0.1 and 10% bbeezzooggeenn aauuff ddeen crystallographic place on the Sm or
- the particle size of the phosphors according to the invention is between 50 nm and 30 ⁇ , preferably between 1 ⁇ and 20 ⁇ , more preferably between 2 pm and 12 ⁇ .
- a further subject of the present invention is a process for the preparation of a compound of the 6-3-6-4 alkaline earth silicooxynitride type with europium doping with the following process steps:
- At least 4 starting materials selected from lanthanum, magnesium, aluminum, samarium, gadolinium, boron, yttrium, luthetium-containing materials,
- the starting materials for preparing the compound or phosphor consist of the corresponding oxides, carbonates or nitrates. Suitable starting materials are also other inorganic and / or organic substances such as cyanamides, dicyanamides, cyanides, oxalates, malonates, fumarates, citrates, ascorbates and acetylacetonates.
- organic solvents such as acetone (see step b) can be added. They serve as auxiliaries of better miscibility of the educts. Should wet-chemical processes (see below more exactly Depending on the method used, organic (eg precipitants such as urea) or inorganic substances (eg acids) are used.
- Conditions e.g. B with forming gas (e.g., 90/10), pure hydrogen, and / or in an ammonia atmosphere with or without the above-noted atmospheres.
- the temperatures during the annealing process amount to several hours (preferably 8 h) between 950 ° C and 1800 ° C, preferably from 1000 ° C to 1550 ° C.
- wet-chemical production processes are also suitable. Preference is given to the combustion process using urea (see Example 1). In this method, e.g. Dissolved nitrate solutions of the corresponding Leuchtstoffedukte in water, then boiled under reflux and mixed with urea, whereby the phosphor precursor is formed slowly.
- the shaped body is preferably a "phosphor body”.
- Another object of the present invention is thus a
- the molded article has a patterned (e.g., pyramidal) surface on the side opposite an LED chip (see WO2008 / 058619, Merck, which is fully incorporated by reference into the context of the present application).
- a patterned (e.g., pyramidal) surface on the side opposite an LED chip (see WO2008 / 058619, Merck, which is fully incorporated by reference into the context of the present application).
- the structured surface on the shaped article is formed by subsequent coating with a suitable material, which is already structured, or in a subsequent step by (photo) lithographic
- It has a rough surface has a roughness of up to several 100 nm.
- the coated surface has the advantage that total reflection can be reduced or prevented and the light can be better decoupled from the phosphor according to the invention (see WO2008 / 058619 (Merck)) which is full-circumference is incorporated by reference in the context of the present application)
- the shaped bodies according to the invention have a refractive index-adapted layer on the surface facing away from the chip, which facilitates the decoupling of the primary radiation and / or the radiation emitted by the phosphor body.
- the molded bodies have a closed surface coating consisting of SiO 2, TiO 2, Al 2 O 3, ZnO, ZrO 2 and / or Y 2 O 3 or mixed oxides and / or from the compounds according to formula I without the activator samarium consists.
- Luminescent decreases and a greater proportion of the light can penetrate into the phosphor and absorbed and converted there.
- Phosphor must be encapsulated. This may be necessary to counter sensitivity of the phosphor or parts thereof to diffusing water or other materials in the immediate environment. Another reason for the encapsulation with a
- closed shell is a thermal decoupling of the actual Fluorescent from the heat that arises in the chip. This heat leads to a reduction in the fluorescent light output of the phosphor and may also affect the color of the fluorescent light. Finally, it is possible by such a coating to increase the efficiency of the phosphor by preventing lattice vibrations arising in the phosphor from propagating to the environment.
- the shaped body is a porous one
- Has surface coating consisting of S1O2, TiO 2 , AfcOa. ZnO, Zr0 2 and / or Y2O3 or mixed oxides thereof and / or from the compounds according to formulas I with or without dopant samarium.
- These porous coatings offer the possibility of further reducing the refractive index of a single layer.
- the preparation of such porous coatings can be accomplished by three conventional methods as described in WO 03/027015, which is incorporated by reference in its entirety in the context of the present application: the etching of glass (eg soda-lime glasses (see US Pat 4019884)), the application of a porous layer and the combination of porous layer and an etching process.
- the shaped body has a surface which carries functional groups which allow a chemical or physical connection to the environment, preferably consisting of epoxy or silicone resin.
- functional groups may e.g. oxo group-attached esters or other derivatives which can form linkages with components based on epoxides and / or silicones.
- Such surfaces have the advantage that a homogeneous mixing of the phosphors is made possible in the binder. Furthermore, this can be the
- Phosphor layer preferably consists of a mixture of silicone and homogeneous phosphor particles, and the silicone one
- this phosphor layer is on
- the thickness of the layer is not consistently constant.
- platelet-shaped phosphors can be produced by atomically etching a natural or synthetically produced highly stable support or a substrate of, for example, mica, S1O2, Al2O3, ZrO2, glass or TiO2 platelets, which has a very high aspect ratio has smooth surface and an adjustable thickness, can be coated by precipitation reaction in aqueous dispersion or suspension with a phosphor layer.
- the platelets may also consist of the phosphor material itself, or be composed of a material. If the plate itself only as a carrier for the
- Phosphor coating is used, it must be made of a material that is transparent to the primary radiation of the LED, or the
- the platelet-shaped phosphors are in a resin (eg Silicone or epoxy resin), and this dispersion is applied to the LED chip.
- the platelet-shaped phosphors can be produced on a large scale in thicknesses of 50 nm up to about 20 ⁇ m, preferably between 150 nm and 5 ⁇ m.
- the diameter is from 50 nm to 20 pm. It usually has an aspect ratio (ratio of diameter to particle thickness) of 1: 1 to 400: 1, and in particular 3: 1 to 100: 1.
- the platelet expansion (length x width) depends on the arrangement. Platelets are also suitable as scattering centers within the conversion layer, especially if they have particularly small dimensions.
- the surface of the platelet-shaped phosphor according to the invention facing the LED chip can be provided with a coating which acts in an anti-reflection manner with respect to the primary radiation emitted by the LED chip. This leads to a reduction in the backscattering of the primary radiation, as a result of which it can be better coupled into the phosphor body according to the invention.
- the production of the shaped bodies according to the invention in the form of ceramic bodies takes place analogously to the process described in WO 2008/017353 (Merck), which is incorporated by reference in its entirety into the context of the present application.
- the phosphor is prepared by mixing the corresponding reactants and dopants, then isostatically pressed and in the form of a homogeneous thin and non-porous platelets directly on the surface applied to the chip or at a distance from the chip (remote phosphor concept).
- the particular arrangement depends, inter alia, on the architecture of the LED device, the skilled person being capable of the advantageous
- the ceramic phosphor bodies may e.g. be produced industrially as platelets in thicknesses of a few 100 nm to about 500 pm.
- Platelet expansion depends on the arrangement. When directly applied to the chip, the size of the chip according to the chip size (from about 100 pm * 100 pm up to several mm 2 ) with a certain excess of about 10% - 30% of the chip surface with a suitable chip arrangement (eg Flip Chip arrangement) or to choose accordingly. If the phosphor plate is placed over a finished LED, the emerging cone of light is completely covered by the plate.
- a suitable chip arrangement eg Flip Chip arrangement
- the side surfaces of the ceramic phosphor body can be mirrored with a light or noble metal, preferably aluminum or silver. The mirroring causes no light to escape laterally from the
- ceramic phosphor body takes place in a process step after the isostatic pressing to bars or plates, which may be done before the mirroring a tailor of the rods or plates in the required size.
- the side surfaces are for this purpose e.g. wetted with a solution of silver nitrate and glucose and then exposed at elevated temperature to an ammonia atmosphere.
- a silver coating on the side surfaces e.g. a silver coating on the side surfaces.
- electroless metallization processes are also suitable, see, for example, Hollemann-Wiberg, Lehrbuch der Inorganischen Chemie, Walter de Gruyter Verlag or Ullmann's Encyclopedia of Chemical Technology.
- the ceramic phosphor body can, if necessary, be fixed with a water glass solution on the substrate of an LED chip.
- the ceramic has
- Phosphor body has a patterned (e.g., pyramidal) surface on the side opposite an LED chip. Thus, as much light as possible can be coupled out of the phosphor body.
- the pressing tool has a structured pressing plate and thereby embosses a structure in the surface. Structured surfaces are desired when thin phosphor bodies or platelets are to be produced.
- Another object of the present invention is a process for the preparation of a shaped body, preferably phosphor body, with the following process steps:
- the excitability of the phosphors according to the invention also extend over a wide range, ranging from about 350 nm to 530 nm, preferably 430 nm to about 500 nm.
- these phosphors are not only suitable for excitation by UV or blue emitting primary light sources such as LEDs or conventional discharge lamps (eg based on Hg), but also for light sources such as those which exploit the blue ln 3+ line at 451 nm.
- Another object of the present invention is a
- Lighting unit with at least one primary light source whose emission maximum or maximum ranges in the range 250 nm to 530 nm, preferably 350 nm to about 500 nm. Particularly preferred is a range between 440 and 480 nm, wherein the primary radiation is partially or completely converted by the compounds or phosphors according to the invention into longer-wave radiation.
- this lighting unit emits white or emits light with a certain color point (color-on-demand principle).
- Lighting unit is the light source to a
- the light source is a
- the light source is a source which
- Electroluminescence and / or photoluminescence shows.
- the light source may also be a plasma or discharge source.
- the phosphors of the present invention may be dispersed either in a resin (e.g., epoxy or silicone resin) or in suitable ones
- the optical coupling of the illumination unit between the phosphor and the primary light source is realized by a light-conducting arrangement.
- the primary light source is installed at a central location and this by means of light-conducting devices, such as
- the lighting requirements adapted lights can only consist of one or
- different phosphors which may be arranged to form a luminescent screen, and a light guide, which is connected to the primary light source
- Another object of the present invention is the use of the shaped body according to the invention as a phosphor body.
- Another object of the present invention is the use of the compounds of the invention for the partial or complete conversion of the near UV emission of a light-emitting diode.
- the mixture is first heated at 1000 C for 2 hours and then again at about 1500 ° C for 8 hours.
- Fig. 1 shows the excitation spectrum
- Fig. 2 shows the emission spectrum of
- Fig. 3 shows the excitation spectrum
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Electroluminescent Light Sources (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Led Device Packages (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009050542A DE102009050542A1 (de) | 2009-10-23 | 2009-10-23 | Sm-aktivierte Aluminat- und Borat-Leuchtstoffe |
PCT/EP2010/005669 WO2011047757A1 (de) | 2009-10-23 | 2010-09-15 | Sm-aktivierte aluminat- und borat-leuchtstoffe |
Publications (1)
Publication Number | Publication Date |
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EP2491094A1 true EP2491094A1 (de) | 2012-08-29 |
Family
ID=43487710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP10759816A Withdrawn EP2491094A1 (de) | 2009-10-23 | 2010-09-15 | Sm-aktivierte aluminat- und borat-leuchtstoffe |
Country Status (8)
Country | Link |
---|---|
US (1) | US9102873B2 (de) |
EP (1) | EP2491094A1 (de) |
JP (1) | JP5808746B2 (de) |
KR (1) | KR101752939B1 (de) |
CN (1) | CN102597160A (de) |
DE (1) | DE102009050542A1 (de) |
TW (1) | TWI527879B (de) |
WO (1) | WO2011047757A1 (de) |
Families Citing this family (5)
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DE102010028818A1 (de) | 2010-05-10 | 2011-11-10 | Swiss Authentication Research And Development Ag | Kombination von Lumineszenzstoffen |
CN106085425B (zh) * | 2016-06-02 | 2018-08-31 | 北京宇极科技发展有限公司 | 一种led用近红外荧光材料、其制备方法及应用 |
CN105907394B (zh) * | 2016-06-03 | 2019-01-15 | 孙德春 | 一种调血脂仪器及其使用的光源材料 |
US11477945B2 (en) | 2019-03-13 | 2022-10-25 | Current Lighting Solutions, Llc | Horticulture lighting device |
CN116064033A (zh) * | 2023-02-13 | 2023-05-05 | 南京农业大学 | 一种无团聚氮化物红色荧光粉及其制备方法 |
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JP3242561B2 (ja) | 1995-09-14 | 2001-12-25 | メルク・ジヤパン株式会社 | 薄片状酸化アルミニウム、真珠光沢顔料及びその製造方法 |
FR2771107B1 (fr) | 1997-11-18 | 1999-12-10 | Commissariat Energie Atomique | Procede de preparation par croissance par epitaxie en phase liquide de couches monocristallines d'aluminate de lanthane et de magnesium (lma) et composants optiques comprenant ces couches |
JP2000144129A (ja) | 1998-11-06 | 2000-05-26 | Agency Of Ind Science & Technol | 可視光で励起される蓄光性蛍光体およびその製造方法 |
US6566808B1 (en) | 1999-12-22 | 2003-05-20 | General Electric Company | Luminescent display and method of making |
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JP2001322867A (ja) * | 2000-05-09 | 2001-11-20 | Matsushita Electric Ind Co Ltd | 透光性焼結体と、これを用いた発光管及び放電灯 |
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KR100913641B1 (ko) | 2001-09-21 | 2009-08-24 | 메르크 파텐트 게엠베하 | 내마모성 sio2 반사방지 층을 제조하기 위한 신규하이브리드 졸 |
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- 2009-10-23 DE DE102009050542A patent/DE102009050542A1/de not_active Withdrawn
-
2010
- 2010-09-15 WO PCT/EP2010/005669 patent/WO2011047757A1/de active Application Filing
- 2010-09-15 JP JP2012534560A patent/JP5808746B2/ja not_active Expired - Fee Related
- 2010-09-15 US US13/502,895 patent/US9102873B2/en not_active Expired - Fee Related
- 2010-09-15 KR KR1020127013205A patent/KR101752939B1/ko active IP Right Grant
- 2010-09-15 CN CN2010800477881A patent/CN102597160A/zh active Pending
- 2010-09-15 EP EP10759816A patent/EP2491094A1/de not_active Withdrawn
- 2010-10-22 TW TW099136185A patent/TWI527879B/zh not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
KR101752939B1 (ko) | 2017-07-03 |
US9102873B2 (en) | 2015-08-11 |
KR20120099693A (ko) | 2012-09-11 |
TW201122084A (en) | 2011-07-01 |
DE102009050542A1 (de) | 2011-04-28 |
JP2013508481A (ja) | 2013-03-07 |
US20120224353A1 (en) | 2012-09-06 |
TWI527879B (zh) | 2016-04-01 |
CN102597160A (zh) | 2012-07-18 |
WO2011047757A1 (de) | 2011-04-28 |
JP5808746B2 (ja) | 2015-11-10 |
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