WO2015058825A1 - Leuchtstoffe - Google Patents
Leuchtstoffe Download PDFInfo
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- WO2015058825A1 WO2015058825A1 PCT/EP2014/002573 EP2014002573W WO2015058825A1 WO 2015058825 A1 WO2015058825 A1 WO 2015058825A1 EP 2014002573 W EP2014002573 W EP 2014002573W WO 2015058825 A1 WO2015058825 A1 WO 2015058825A1
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- WIPO (PCT)
- Prior art keywords
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- compound
- compound according
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- light source
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 239000002223 garnet Substances 0.000 claims abstract description 27
- 150000001875 compounds Chemical class 0.000 claims description 49
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052732 germanium Inorganic materials 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 13
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 150000002739 metals Chemical class 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- -1 silicon halides Chemical class 0.000 claims description 11
- 229910052712 strontium Inorganic materials 0.000 claims description 11
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 229910052788 barium Inorganic materials 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910052771 Terbium Inorganic materials 0.000 claims description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 5
- 229940119177 germanium dioxide Drugs 0.000 claims description 5
- 150000004820 halides Chemical class 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001615 alkaline earth metal halide Inorganic materials 0.000 claims description 3
- 229910052605 nesosilicate Inorganic materials 0.000 claims description 3
- 150000004762 orthosilicates Chemical class 0.000 claims description 3
- 229910052765 Lutetium Inorganic materials 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 claims description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims 1
- AUCDRFABNLOFRE-UHFFFAOYSA-N alumane;indium Chemical compound [AlH3].[In] AUCDRFABNLOFRE-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000004907 flux Effects 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- 229910052725 zinc Inorganic materials 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 9
- 238000001354 calcination Methods 0.000 description 9
- 229910052684 Cerium Inorganic materials 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 230000001603 reducing effect Effects 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 229910017639 MgSi Inorganic materials 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 229910004261 CaF 2 Inorganic materials 0.000 description 6
- 229910004762 CaSiO Inorganic materials 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 101100476480 Mus musculus S100a8 gene Proteins 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 5
- 229910003668 SrAl Inorganic materials 0.000 description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical group CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229910052950 sphalerite Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229910052984 zinc sulfide Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910016036 BaF 2 Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910004283 SiO 4 Inorganic materials 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical group CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 3
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 3
- 239000001099 ammonium carbonate Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910002420 LaOCl Inorganic materials 0.000 description 2
- 229910010199 LiAl Inorganic materials 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- 229910008484 TiSi Inorganic materials 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 description 2
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- KPZSTOVTJYRDIO-UHFFFAOYSA-K trichlorocerium;heptahydrate Chemical compound O.O.O.O.O.O.O.Cl[Ce](Cl)Cl KPZSTOVTJYRDIO-UHFFFAOYSA-K 0.000 description 2
- SJOQNHYDCUXYED-UHFFFAOYSA-K trichlorolutetium;hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Lu+3] SJOQNHYDCUXYED-UHFFFAOYSA-K 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000007704 wet chemistry method Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- 229910016066 BaSi Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 101100534223 Caenorhabditis elegans src-1 gene Proteins 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 101150027751 Casr gene Proteins 0.000 description 1
- 150000000703 Cerium Chemical class 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 229910017414 LaAl Inorganic materials 0.000 description 1
- 229910012506 LiSi Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 229910017857 MgGa Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910003691 SiBr Inorganic materials 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910007709 ZnTe Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 150000001649 bromium compounds Chemical class 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 150000002258 gallium Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 229940047908 strontium chloride hexahydrate Drugs 0.000 description 1
- AMGRXJSJSONEEG-UHFFFAOYSA-L strontium dichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Sr]Cl AMGRXJSJSONEEG-UHFFFAOYSA-L 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical group CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical group CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/77744—Aluminosilicates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
Definitions
- the present invention relates to cerium doped garnet phosphors. Another object of the present invention relates to a method for producing cerium-doped garnet luminophore, and the use of these garnet phosphors as conversion phosphors. Another object of the present invention relates to a light-emitting device containing cerium-doped garnet phosphors according to the invention.
- Inorganic fluorescent powders which can be excited in the blue and / or UV spectral range are becoming increasingly important as conversion phosphors for phosphor converted LEDs, in short pc LEDs.
- conversion phosphor materials systems such as alkaline earth orthosilicates, thiogallates, nitrides, and garnets each doped with Ce 3+ or Eu 2+ .
- the latter garnet phosphors, which have the general formula M 3 Al 5 0i 2 : Ce 3+ , wherein M is Y, Lu, Tb or Gd, have an intense absorption in the blue spectral region, which very efficiently in yellow (YAG: Ce) or yellow-green (LuAG: Ce) emission is converted.
- These materials are therefore widely used as well as due to their high chemical stability.
- garnet phosphors takes place in particular as solid-state synthesis of the oxides, that is, for example, from LU 2 O 3 , Al 2 O 3 and EU 2 O 3 .
- synthetic methods of solution are also known. Fluxes are usually used for the synthesis. These fulfill different tasks; Among other things, they allow lower reaction temperatures and / or accelerated crystal growth, or they prevent the formation of foreign phases. It is also possible that the flux is incorporated, at least in trace amounts, into the resulting garnet phosphor.
- various substances are known, in particular BaF 2 and other fluorides.
- No. 6,409,938 describes the synthesis of YAG: Ce and other garnets using AIF 3 as a flux. This achieves higher quantum efficiency. In addition, a less reducing atmosphere is sufficient for the reaction, which simplifies the reaction. The resulting garnet phosphor may also contain a small amount of fluoride from the flux. Both solid-state and wet-chemical processes are described. The reaction temperature used is 1500 ° C.
- Another object of the present invention was to provide a process for the synthesis of garnet phosphors, with which the quantum efficiency of the garnet can be increased and / or in which a lower reaction temperature is sufficient than according to the prior art. Another object of the present invention was to provide a process for the synthesis of garnet phosphors while avoiding a fluoride-containing flux which nevertheless gives good results. Another object of the present invention is the
- garnet phosphors having higher quantum efficiency compared to prior art garnet phosphors.
- this object is achieved by the garnet phosphor is prepared by a wet chemical process, wherein a mixture of an alkaline earth metal halide and silica suspension is used as a flux.
- Garnet phosphors obtainable by such a method are therefore a further subject of the present invention.
- the invention therefore provides a compound of the formula (1)
- M ' is Y, Tb, Gd or a mixture of these metals
- EA is Ca, Sr, Ba or a mixture of these metals
- EA is selected from Sr and / or Ba, more preferably Sr.
- x ie the content of Ce, is 0.01 ⁇ x ⁇ 0.15.
- Germanium 0.01 ⁇ z ⁇ 0.25, more preferably 0.01 ⁇ z ⁇ 0.15, especially 0.05 ⁇ z ⁇ 0.10.
- the compounds of the invention may be coated. All coatings are suitable for this purpose. tion method, as known in the art to those skilled in the art and applied to phosphors. Suitable materials for the coating are in particular metal oxides, such as Al 2 O 3, TiO 2, rO 2 or ZnO 2, and nitrides, such as AIN, and SiO 2. The coating can be carried out, for example, by fluidized bed processes. Further suitable coating methods are known from JP 04-304290, WO 91/10715, WO 99/27033, US 2007/0298250, WO 2009/065480 and WO 2010/075908.
- the present invention further provides a process for producing a cerium-doped garnet, characterized in that the process is carried out via a wet-chemically prepared precursor and a silicon- or germanium-containing compound and an alkaline earth metal halide are added.
- a cerium-doped garnet in the sense of the present invention is a compound of the following formula (3)
- M is Lu, Y, Tb, Gd or a mixture of these metals
- ions M may be replaced by an alkaline earth metal selected from Mg, Ca, Sr and / or Ba, and at the same time an equal proportion of Al or Ga may be replaced by Si or Ge.
- the cerium-doped garnet is a compound of the following formula (4)
- EA is Mg, Ca, Sr, Ba or a mixture of these metals
- Preferred embodiments of the compounds of the formula (4) are the compounds of the above-mentioned formulas (1), (1a), (1b), (1c) and (2).
- Suitable starting materials for this are all silicon-containing compounds which hydrolyze to silica.
- Suitable silicon-containing educts are tetraalkyl orthosilicates, where the alkyl groups, identically or differently on each occurrence, have 1 to 10 C atoms, preferably identical or different, each occurrence having 1 to 4 C atoms, in particular tetramethyl-, tetraethyl-, Tetra-n-propyl, tetra-iso-propyl and tetrabutyl orthosilicate, and silicon halides, in particular SiCI 4 and SiBr 4 .
- Particularly preferred are tetramethyl orthosilicate (TMOS) and tetraethyl orthosilicate (TEOS).
- the process may comprise the preparation of a germanium dioxide suspension.
- Suitable starting materials for this are all germanium-containing compounds which hydrolyze to germanium dioxide.
- Suitable germanium-containing starting materials are tetraalkylorthogermanates, where the alkyl groups, identically or differently on each occurrence, have 1 to 10 C atoms, preferably identical or different, each occurrence having 1 to 4 C atoms, in particular tetramethyl, tetraethyl, tetra-n-1-one.
- Particularly preferred are tetramethyl orthogermanate and tetraethylorthogermanate.
- the preferred reaction medium is a mixture of Alcohol, preferably with 1 to 4 C-atoms, more preferably methanol or ethanol, and water used.
- the hydrolysis of these compounds to orthosilic acid H 4 SiO 4 or to H 4 GeO 4 and ethanol or methanol proceeds very slowly in neutral water.
- the H formed decomposes SiO 4 and H 4 GeO 4 by the formation of Si-O-Si or GeO-Ge bonds and further release of water into silica or
- Germanium dioxide The hydrolysis takes place considerably faster in an acidic or alkaline medium, since both catalyze the reaction considerably.
- the preparation of the S1O2 or GeO2 suspension is therefore carried out in the alkaline, in particular in an ammoniacal solution. It is particularly preferred if the SiO 2 or GeO 2 suspension is neutralized after its preparation, in particular by addition of acid, for example hydrochloric acid.
- the process continues to take place with addition of an alkaline earth halide.
- the alkaline earth metal is selected from Mg, Ca, Sr and / or Ba, preferably Ca, Sr and / or Ba, more preferably Sr and / or Ba and especially Sr.
- the halide ion is preferably not fluoride due to the corrosivity of Fluoride and the thus required more complex reaction.
- the halide ion is preferably chloride or bromide, in particular chloride. Preference is thus given to the addition of CaCl 2 , SrC and / or BaCl 2 , particularly preferably SrC and / or BaC and in particular SrC 1.
- a solution of one or more salts containing M, a cerium salt, an aluminum salt, an alkaline earth metal salt and optionally a gallium salt is prepared.
- the solution is preferably prepared in water.
- the ratio of M, Ce, Al, EA, Si or Ge and optionally Ga in the solutions and suspensions is determined by the desired ratio of these elements in the product. It applies to the proportion of EA and Si or Ge preferably: 0.01 ⁇ z ⁇ 0.25, particularly preferably 0.01 ⁇ z ⁇ 0.15 and in particular 0.05 ⁇ z ⁇ 0.1.
- Suitable salts are any salts of the corresponding metals, provided that they are sufficiently soluble in water.
- Suitable salts of the metals M, Ce, Al and, if appropriate, Ga are the halides, in particular chlorides, bromides and iodides, nitrates and carbonates, if appropriate in the form of the corresponding hydrates.
- the solution described above or the solutions containing M, Ce, Al, EA and optionally Ga is combined with the Si0 2 or Ge0 2 suspension.
- the S1O 2 or Ge0 2 suspension is preferably added to a precipitating reagent, for example ammonium bicarbonate solution. This serves to precipitate the ions in the form of the carbonates.
- a precipitating reagent for example ammonium bicarbonate solution.
- the solution or solutions containing M, Ce, Al, EA and optionally Ga are added to the SiO 2 or Ge0 2 suspension, this addition preferably being slow, for example dropwise.
- the halides when the metals are used in the form of halides, such as chlorides, are acidic, it may be useful to neutralize during the reaction or
- the resulting mixture is stirred, for example over a period of 1 minute to 24 hours, preferably 10 minutes to 10 hours, more preferably 15 minutes to 1 hour. This forms a solid.
- the solid is separated, for example by suction or filtration, and dried.
- the solid may be dried under vacuum and / or at elevated temperature, preferably at 60-200 ° C., more preferably at 100-150 ° C.
- the precursor thus obtained is preferably converted to the product by two calcination steps.
- the first calcination step is preferably carried out at a temperature of 800 to 1400 ° C, more preferably from 1000 to 1200 ° C. This first calcination step is preferably carried out in air.
- the second calcination step is preferably carried out at a temperature of 1000 to 1600 ° C, more preferably from 1200 to 1500 ° C, most preferably from 1200 to 1400 ° C.
- the second calcining step is preferably carried out under non-oxidizing conditions, ie. H. under substantially or completely oxygen-free conditions, in particular under reducing conditions.
- Non-oxidizing conditions are understood as meaning any conceivable non-oxidizing atmospheres, in particular substantially oxygen-free atmospheres, that is to say an atmosphere whose maximum oxygen content is ⁇ 100 ppm, in particular ⁇ 10 ppm.
- a non-oxidizing atmosphere can be generated, for example, by the use of inert gas, in particular nitrogen or argon.
- a preferred non-oxidizing atmosphere is a reducing atmosphere.
- the reducing atmosphere is defined as containing a reducing gas. Which gases have a reducing effect is known to the person skilled in the art.
- Suitable reducing gases are hydrogen, carbon monoxide, ammonia or ethylene, preferably hydrogen, which gases may also be mixed with other non-oxidizing gases.
- the reducing atmosphere is particularly preferably prepared by a mixture of nitrogen or argon and hydrogen, preferably in the ratio H 2 : N 2 or H 2 : Ar of 5:95 to 50:50, preferably about 10:90, in each case based on the volume.
- reaction times of the first and second calcining steps are each independently preferably in the range of 1 to 18 hours, more preferably in the range of 3 to 8 hours.
- the calcination is preferably carried out in each case so that the resulting mixtures, for example, in a vessel, for. B. boron nitride, AI2O3 or ceramic, are introduced into a high-temperature furnace.
- the high-temperature furnace for example, a tube furnace containing a support plate made of molybdenum foil.
- the work-up of the product is usually carried out by mortars, washing and / or sieving.
- the washing for example, with water and / or an acid, such as. Hydrochloric acid or nitric acid.
- the quantum efficiency of the product obtained is higher than the quantum efficiency of comparable compounds which have been prepared by a different process or with the addition of another flux, without adversely affecting other properties of the phosphor.
- the present invention further relates to a compound obtainable according to the process of the invention.
- the compound produced by the process according to the invention differs from compounds of the same or similar composition prepared according to the prior art in that it has a higher emission efficiency. Due to the complex structure of the compound of the invention, the compound of the invention can not be clearly characterized by structural features. However, it is clearly distinguishable from the compounds known in the prior art in that it has a higher radiation-induced emission efficiency and / or intensity and optionally a color shift of the emission maximum. Therefore, an identification of the compound according to the invention by the steps of the manufacturing method according to the invention is justified.
- Another object of the present invention is the use of a compound of the invention, in particular a compound according to formula (1), (1a), (1 b), (1c), (2), (2a) or (2b), as a phosphor, in particular as a conversion luminescent substance.
- a further subject of the present invention is an emission-converting material comprising the compound according to the invention.
- the emission-converting material may consist of the compound according to the invention and would in this case be equated with the term "conversion phosphor".
- the emission-converting material according to the invention contains, in addition to the compound according to the invention, further conversion phosphors.
- the emission-converting material according to the invention contains a mixture of at least two conversion phosphors, one of which is a compound according to the invention.
- the at least two conversion phosphors are phosphors which emit light of different wavelengths which are complementary to one another. Since the compound according to the invention is a yellow, green or yellow green emitting compound, it is preferably used in combination with an orange or red emitting compound and a blue emitting LED or with an orange or red emitting compound, a blue emitting compound and a used in the UV emitting LED. It may therefore be preferred that the conversion phosphor according to the invention is used in combination with one or more further conversion phosphors in the emission-converting material according to the invention, which then together preferably emit white light.
- blue light is defined as light whose emission maximum lies between 400 and 459 nm, cyan light whose emission maximum is between 460 and 505 nm, green light whose emission maximum lies between 506 and 545 nm , as yellow light such, whose emission maximum lies between 546 and 565 nm, as orange light such, whose Emission maximum between 566 and 600 nm and is such as red light whose emission maximum is between 601 and 670 nm.
- BaSrMgSi 2 O 7 Eu 2+, BaTiP 2 O 7, (Ba, Ti) 2 P 2 0 7: Ti, Ba 3 W0 6: U,
- BaY 2 F 8 Er 3+ , Yb + , Be 2 Si0 4 : Mn 2+ , Bi 4 Ge 3 0 12 , CaAl 2 O 4 : Ce 3+ , CaLa 4 0 7 : Ce 3+ , CaAl 2 0 4 Eu 2+ , CaAl 2 O 4 : Mn 2+ , CaAl 4 O 7 : Pb 2+ , Mn 2+ , CaAl 2 O 4 : Tb 3+ ,
- CaB 2 O 4 Pb 2+
- CaB 2 P 2 O 9 Eu 2+
- Ca 5 B 2 SiO 2 0 Eu 3+
- Cao.5Bao .5 Ali 2 Oi 9 Ce 3+ , Mn 2+ , Ca 2 Ba 3 (PO 4 ) 3 Cl: Eu 2+ , CaBr 2 : Eu 2+ in Si0 2 , CaCl 2 : Eu 2+ in Si0 2) CaCl 2 : Eu 2+ , Mn 2+ in SiO 2 , CaF 2 : Ce 3+ , CaF 2 : Ce 3+ , Mn 2+ , CaF 2 : Ce 3+ , Tb 3+ , CaF 2 : Eu + , CaF 2 : Mn 2+ , CaF 2 : U, CaGa 2 O: Mn 2+ ,
- CaGa 4 O 7 Mn 2+ , CaGa 2 S 4 : Ce 3+ , CaGa 2 S 4 : Eu 2+ , CaGa 2 S: Mn 2+ ,
- CaGa 2 S 4 Pb 2+ , CaGeO 3 : Mn + , Cal 2 : Eu 2+ in SiO 2 , Cal 2 : Eu 2+ , Mn + in
- Ca 2 P 2 O 7 Ce 3+ , ⁇ -Ca 3 (PO 4 ) 2 : Ce 3+ , ⁇ -Ca 3 (PO 4 ) 2 : Ce 3+ , Ca 5 (PO 4 ) 3 Cl: Eu 2 + , Ca 5 (PO 4 ) 3 Cl: Mn 2+ , Ca 5 (PO 4 ) 3 Cl: Sb 3+ , Ca 5 (PO 4 ) 3 Cl: Sn 2+ ,
- beta-Ca 3 (P0 4) 2 Eu 2+, Mn 2+, Ca 5 (P0 4) 3 F: Mn 2+, Ca s (PO 4) 3 F: Sb 3+, Ca s (P0 4) 3 F: Sn 24 a-Ca 3 (PO 4 ) 2 : Eu 2+ , ⁇ -Ca 3 (PO 4 ) 2 : Eu 2+ , Ca 2 P 2 O 7 : Eu 2+ , Ca 2 P 2 0 7 : Eu 2+, Mn 2+, CaP 2 O 6: Mn 2+, a-Ca 3 (PO 4) 2: Pb 2+, a-Ca 3 (P0 4) 2: Sn 2+, beta-Ca 3 (P0 4 ) 2 : Sn 2+ , ⁇ -Ca 2 P 2 O 7 : Sn, Mn, ⁇ -Ca 3 (PO 4 ) 2 : Tr, CaS: Bi 3+ , CaS: Bi 3+ , Na, CaS
- GdNb0 4 Bi 3+ , Gd 2 0 2 S: Eu 3+ , Gd 2 0 2 Pr 3+ , Gd 2 0 2 S: Pr, Ce, F, Gd 2 O 2 S: Tb 3+ , Gd 2 SiO 5 : Ce 3+ , KAl 0 17 : TI + , KGan0 7 : Mn 2+ , K 2 La 2 Ti 3 O 0 : Eu, KMgF 3 : Eu 2+ , KMgF 3 : Mn 2+ , K 2 SiF 6 : Mn + , LaAl 3 B 4 0i 2 : Eu 3+ , LaAIB 2 O 6 : Eu 3+ , LaAlO 3 : Eu 3+ , LaAIO 3 : Sm 3+ , LaAsO 4 : Eu 3+ , LaBr 3 : Ce 3+ , LaBO 3 : Eu 3+ , (La, Ce, Tb) PO 4 : Ce: T
- LiAIF 4 Mn 2+ , LiAl 5 O 8 : Fe 3+ , LiAIO 2 : Fe 3+ , LiAIO 2 : Mn 2+ , LiAl 5 O 8 : Mn 2+ ,
- Li 2 CaP 2 O 7 Ce 3+ , Mn 2+ , LiCeBa 4 SiO 14 : Mn 2+ , LiCeSrBa 3 Si 4 Oi 4 : Mn 2+ ,
- MgBaP 2 0 7 Eu +
- MgBaP 2 0 7 Eu 2+
- MgBa (SO 4 ) 2 Eu 2+
- Mg 3 Ca 3 (PO 4 ) 4 Eu 2+
- MgCaP 2 O 7 Mn 2+
- Mg 2 Ca (S0 4 ) 3 Eu 2+ ,
- Mg 4 (F) (Ge, Sn) O 6 Mn 2+ , MgF 2 : Mn 2+ , MgGa 2 O 4 : Mn 2+ , Mg 8 Ge 2 OnF 2 : Mn 4+ , MgS: Eu 2+ , MgSi0 3 : Mn 2+ , Mg 2 Si0 4 : Mn 2 ⁇ Mg 3 Si0 3 F 4 : Ti 4+ , MgS0 4 : Eu 2+ , MgSO 4 : Pb 2+ , MgSrBa 2 Si 2 O 7 : Eu 2+ , MgSrP 2 O 7 : Eu 2+ , MgSr 5 (PO 4 ) 4 : Sn 2+ , MgSr 3 Si 2 O 8 : Eu 2+ , Mn 2+ , Mg 2 Sr (SO 4 ) 3 : Eu 2+ , Mg 2 Ti0 4 : Mn 4+ , MgW0 4 ,
- SrB 4 O 7 Eu 2+ (F, CI, Br), SrB 4 O 7 : Pb 2+ , SrB 4 O 7 : Pb 2+ , Mn 2+ , SrB 8 0 13 : Sm 2+ , Sr x Ba y Cl z Al 2 O 4 -z / 2: Mn 2+ , Ce 3+ , SrBaSiO 4 : Eu 2+ , Sr (Cl, Br, I) 2 : Eu 2+ in SiO 2 , SrCl 2 : Eu 2+ in SiO 2 , Sr 5 Cl (PO 4 ) 3 : Eu, Sr w F x B 4 O 6 .5: Eu 2+ , Sr w F x B y O z : Eu 2+ , Sm 2+ , SrF 2 : Eu 2+ , SrGai 2 0i 9 : Mn 2+ , SrGa 2 S 4 : Ce 3+
- Sr 5 (PO 4) 3 F Sb 3+, Mn 2+, Sr 5 (P0 4) 3 F: Sn 2+, Sr 2 P 2 0 7: Sn 2+, Sr-ß 3 (P0 4) 2 : Sn 2+ , ⁇ -Sr 3 (PO 4 ) 2 : Sn 2+ , Mn 2+ (Al), SrS: Ce 3+ , SrS: Eu 2+ , SrS: Mn 2+ , SrS: Cu + , Na , SrSO 4: Bi, SrS0: Ce 3+, SrS0 4: Eu 2+, SrS0 4: Eu 2+, Mn 2+, Sr 5 Si 4 OioCI 6: Eu 2+, Sr 2 SiO 4: Eu 2+, SrTiO 3 : Pr 3+ , SrTiO 3 : Pr 3+ , Al 3+ , Sr 3 W 0 6 : U, SrY 2 O 3 : Eu 3
- Th0 2 Eu 3+
- ThO 2 Pr 3+
- Th0 2 Tb 3+
- YAl 3 B 4 O 12 Bi 3+
- YAl 3 B 4 0 12 Ce 3+
- YAI 3 B 4 O 12 Ce 3+, Mn
- YAI 0 3 B 4 12 Ce 3+, Tb 3+
- YAI 3 B 4 Oi 2 Eu 3+
- Y 2 O 2 S Tb 3+ , Y 2 O 3 : Tb 3+ , YPO 3: Ce 3+ , YPO 4 : Ce 3+ , Tb 3+ , YPO 4 : Eu 3+ ,
- YPO 4 Mn 2+ , Th + , YPO 4 : V 5+ , Y (P, V) O 4 : Eu, Y 2 SiO 5 : Ce 3+ , YTaO 4 , YTaO 4 : Nb 5+ , YVO 4 : Dy 3+, YVO 4: Eu 3+, ZnAl 2 O 4: Mn 2+, ZnB 2 0 4: Mn 2+, ZnBa 2 S 3: Mn 2+,
- Zn 2 Ge0 4 Mn 2+ , (Zn, Mg) F 2 : Mn 2+ , ZnMg 2 (PO 4 ) 2 : Mn 2+ , (Zn, Mg) 3 (PO 4 ) 2 : Mn 2+ , ZnO : Al 3+, Ga 3 ⁇ ZnO: Bi 3+, ZnO: Ga 3+, ZnO: Ga, ZnO-CdO: Ga, ZnO: S, ZnO: Se, ZnO: Zn, ZnS: Ag +, Cl ", ZnS: Ag, Cu, Cl, ZnS: Ag, Ni, ZnS: Au, In, ZnS-CdS (25-75), ZnS-CdS (50-50), ZnS-CdS (75-25), ZnS-CdS : Ag, Br, Ni, ZnS-CdS: Ag + , Cl, ZnS-CdS: Cu, Br, ZnS-CdS: Cu,
- ZnS Te, Mn, ZnS-ZnTe: Mn 2+ , ZnSe: Cu ⁇ Cl or ZnW0 4 .
- the emission-converting material according to the invention is used in a light source.
- the light source is an LED, in particular a phosphor-converted LED, in short pc-LED.
- the emission-converting material in addition to the conversion phosphor according to the invention comprises at least one further conversion phosphor, in particular so that the light source emits white light or light with a particular color point (color-on-demand principle).
- Color-on-demand principle means the realization of light of a particular color point with a pc-LED using one or more conversion phosphors.
- Another object of the present invention is thus a light source, the primary light source and the emission-converting
- the emission-converting material in addition to the conversion phosphor according to the invention comprises at least one further conversion luminescent material, so that the light source preferably emits white light or light with a specific color point.
- the light source according to the invention is preferably a pc-LED.
- a pc-LED usually contains a primary light source and an emission converting material.
- the emission-converting material according to the invention can either be dispersed in a resin (for example epoxy or silicone resin) or, with suitable proportions, directly on the surface of the resin
- the primary light source may be a semiconductor chip, a luminescent light source such as ZnO, a so-called transparent conducting oxide, a ZnSe or SiC based device, an organic light emitting layer based device (OLED), or a plasma or discharge source, most preferably semiconductor chip.
- a luminescent light source such as ZnO
- a so-called transparent conducting oxide such as ZnSe or SiC based device
- OLED organic light emitting layer based device
- plasma or discharge source most preferably semiconductor chip.
- the primary light source is a semiconductor chip, it is preferably a luminescent indium-aluminum-gallium nitride (InAIGaN), as known in the art.
- InAIGaN luminescent indium-aluminum-gallium nitride
- the emission-converting material according to the invention can be converted for use in light sources, in particular pc LEDs, into any external forms such as spherical particles, platelets and structured materials and ceramics. These forms are summarized under the term "shaped body". Consequently, the moldings are emission-converting moldings.
- Another subject of the invention is a lighting unit which contains at least one light source according to the invention.
- Such lighting units are mainly used in display devices, in particular liquid crystal display devices (LC display) with a backlight. Therefore, such a display device is the subject of the present invention.
- LCD display liquid crystal display devices
- the optical coupling between the emission-converting material and the primary light source preferably takes place by means of a light-conducting arrangement.
- the primary light source to be installed at a central location and to be optically coupled to the emission-converting material by means of light-conducting devices, such as, for example, photoconductive fibers.
- the lighting desires custom-fit lights consisting of one or more different conversion phosphors, which can be arranged to a fluorescent screen, and a light guide, which is coupled to the primary light source realize.
- This makes it possible to place a strong primary light source in a convenient location for electrical installation and without further electrical wiring, only by laying fiber optics at any location, lights off
- Figure 1 emission spectra of LuAG.Ce, prepared in accordance with Beispie! 1 without the addition of a flux (curve 1), according to example 4 with the flux combination SrCI 2 + S1O 2 (curve 2) according to the invention, according to example 2 with AIF 3 as flux (curve 3) and according to example 3 with BaF 2 as flux (curve 4).
- the LuAG: Ce still contains ions of the flux in the lattice structure, that is to say, for example, in Example 4 (curve 2) Sr and Si.
- FIG. 2 Emission spectra of the pcLEDs from Examples 6 and 7.
- Powder emission spectra are measured by the following general procedure: A phosphor powder bed having a depth of 5 mm, the surface of which has been smoothed out with a glass plate, becomes the integration sphere of a Edinburgh fluorescence spectrometer
- Instruments FL 920 irradiated with a xenon lamp as an excitation light source at a wavelength of 450 nm and the intensity of the emitted fluorescence radiation in a range of 465 nm to 800 nm in 1 nm steps measured.
- Example 1 Preparation of LuAG: Ce without flux additive (curve 1 in FIGS. 1 and 2, comparative example)
- the product is washed in 1 molar hydrochloric acid. 4 ml of HCl are added per gram of precalcined precursor and stirred for 20 minutes. The solid is again filtered off with suction and washed with 12 ml of demineralized water per g. After renewed drying 50 g of the material are reacted for 4 h at a temperature of 1350 ° C and under an argon / hydrogen atmosphere to the phosphor.
- Example 4 Preparation of LuAG: Ce or Lu2,88Ce 0, o2Sro, iAl4,9Sio, iOi2 using the flux combination according to the invention (curve 2 in Figure 1 and 2)
- the precursor thus prepared is precalcined for 4 hours at 1100 ° C in air. After precalcination, the product is briefly crushed and then reacted for 4 h at a temperature of 1350 ° C and under an argon / hydrogen atmosphere (90:10 v: v) to the phosphor.
- the product has the composition
- a mass of m L s (in g) of the phosphor listed in the respective LED example is weighed, mixed with msnikon (in g) of an optically transparent silicone and then mixed homogeneously in a planetary centrifugal mixer, so that the phosphor concentration in the total mass CLS (in% by weight).
- the resulting silicone-phosphor mixture is applied by means of an automatic dispenser on the chip of a blue semiconductor LED and cured with heat.
- the blue semiconductor LEDs used in the present examples for LED characterization have an emission wavelength of 442 nm and are operated at 350 mA amperage.
- the photometric characterization of the LED is carried out with a spectrometer of the Fa.
- the phosphor concentrations could not be selected identically, since similar color coordinates are obtained only at different phosphor concentrations, which can be compared with one another.
- the LED of Example 6 has a higher luminous flux ⁇ ⁇ (in Im) with comparable color coordinates and thus a higher efficiency.
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CN104250555A (zh) * | 2013-06-27 | 2014-12-31 | 宁波升谱光电半导体有限公司 | 黄色荧光粉及其制备方法和使用该荧光粉的发光器件 |
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2014
- 2014-09-23 WO PCT/EP2014/002573 patent/WO2015058825A1/de active Application Filing
- 2014-09-23 US US15/031,050 patent/US20160244665A1/en not_active Abandoned
- 2014-09-23 DE DE112014004801.1T patent/DE112014004801A5/de not_active Withdrawn
- 2014-09-23 CN CN201480057704.0A patent/CN105658763A/zh active Pending
- 2014-10-20 TW TW103136186A patent/TW201527489A/zh unknown
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WO2012010244A1 (de) * | 2010-07-21 | 2012-01-26 | Merck Patent Gmbh | Aluminat-leuchtstoffe |
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Title |
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A. KATELNIKOVAS ET AL: "Synthesis and optical properties of green emitting garnet phosphors for phosphor-converted light emitting diodes", OPTICAL MATERIALS, vol. 34, no. 7, 1 May 2012 (2012-05-01), pages 1195 - 1201, XP055154418, ISSN: 0925-3467, DOI: 10.1016/j.optmat.2012.01.034 * |
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DE112014004801A5 (de) | 2016-08-25 |
TW201527489A (zh) | 2015-07-16 |
US20160244665A1 (en) | 2016-08-25 |
CN105658763A (zh) | 2016-06-08 |
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