DE19934126A1 - Fluorescent oxide for forming white LEDs, includes cerium-activated garnet-based oxide with terbium addition - Google Patents

Fluorescent oxide for forming white LEDs, includes cerium-activated garnet-based oxide with terbium addition

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Publication number
DE19934126A1
DE19934126A1 DE19934126A DE19934126A DE19934126A1 DE 19934126 A1 DE19934126 A1 DE 19934126A1 DE 19934126 A DE19934126 A DE 19934126A DE 19934126 A DE19934126 A DE 19934126A DE 19934126 A1 DE19934126 A1 DE 19934126A1
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Prior art keywords
phosphor
radiation
component
phosphor according
oxide
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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Withdrawn
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DE19934126A
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German (de)
Inventor
Franz Kummer
Franz Zwaschka
Andries Ellens
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Priority to DE19934126A priority Critical patent/DE19934126A1/en
Priority to JP2001513209A priority patent/JP2003505582A/en
Priority to PCT/DE2000/002241 priority patent/WO2001008452A1/en
Priority to CN200610101855.9A priority patent/CN1900217A/en
Priority to US09/787,208 priority patent/US6669866B1/en
Priority to DE50004145T priority patent/DE50004145D1/en
Priority to CNB2004100817860A priority patent/CN100344728C/en
Priority to CA2345114A priority patent/CA2345114C/en
Priority to AT00956080T priority patent/ATE252814T1/en
Priority to EP03021392A priority patent/EP1378556A3/en
Priority to KR10-2001-7003757A priority patent/KR100431398B1/en
Priority to HU0103863A priority patent/HU228953B1/en
Priority to DE20023590U priority patent/DE20023590U1/en
Priority to EP00956080A priority patent/EP1116418B2/en
Priority to CNB008014949A priority patent/CN1190997C/en
Priority to TW89114631A priority patent/TW539737B/en
Priority to AU72675/00A priority patent/AU7267500A/en
Priority to KR10-2001-7003756A priority patent/KR100450647B1/en
Priority to DE50016032T priority patent/DE50016032D1/en
Priority to CNB008014957A priority patent/CN100334746C/en
Priority to DE50008093T priority patent/DE50008093D1/en
Priority to US09/786,086 priority patent/US7132786B1/en
Priority to PCT/DE2000/002405 priority patent/WO2001008453A1/en
Priority to CA2343909A priority patent/CA2343909C/en
Priority to EP00960304A priority patent/EP1116419B1/en
Priority to JP2001513210A priority patent/JP3825318B2/en
Priority to AT00960304T priority patent/ATE279089T1/en
Priority to EP04018028A priority patent/EP1471775B9/en
Publication of DE19934126A1 publication Critical patent/DE19934126A1/en
Priority to US10/687,436 priority patent/US7115217B2/en
Priority to US10/840,575 priority patent/US6998771B2/en
Priority to JP2004341109A priority patent/JP4639351B2/en
Priority to US11/066,671 priority patent/US7063807B2/en
Priority to US11/296,673 priority patent/US7261837B2/en
Priority to US11/359,267 priority patent/US20060138388A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • 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
    • H01L33/504—Elements with two or more wavelength conversion materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Luminescent Compositions (AREA)

Abstract

Fluorescent, cerium-activated garnet-based structure comprises A3B5O12 structure with B representing Al and/or Ga, a novel introduction of terbium is included in the first component A. An Independent claim is included for the method of making the fluorescent material by melting the oxide with addition of flux, heating strongly in forming gas, grinding and sieving, and reheating.

Description

Technisches GebietTechnical field

Die Erfindung geht aus von einem Leuchtstoff für Lichtquellen und zugehörige Lichtquelle gemäß dem Oberbegriff des Anspruchs 1. Es handelt sich dabei insbe­ sondere um einen gelb emittierenden Granat-Leuchtstoff für die Anregung durch kurze Wellenlängen im sichtbaren Spektralbereich. Als Lichtquelle eignet sich ins­ besondere eine Lampe (vor allem Leuchtstofflampe) oder eine LED (light emitting diode), die beispielsweise weißes Licht erzeugt.The invention is based on a phosphor for light sources and associated Light source according to the preamble of claim 1. It is esp especially around a yellow-emitting garnet phosphor for excitation short wavelengths in the visible spectral range. Is suitable as a light source especially a lamp (especially fluorescent lamp) or an LED (light emitting diode), which generates white light, for example.

Stand der TechnikState of the art

Aus der WO 98/05078 ist bereits ein Leuchtstoff für Lichtquellen und zugehörige Lichtquelle bekannt. Als Leuchtstoff wird dort ein Granat der Struktur A3B5O12 einge­ setzt, dessen Wirtsgitter als erste Komponente A aus mindestens einer der Seltenen Erdmetalle Y, Lu, Sc, La, Gd oder Sm besteht. Weiter wird für die zweite Kompo­ nente B eines der Elemente Al, Ca oder In verwendet. Als Dotierstoff wird aus­ schließlich Ce eingesetzt.WO 98/05078 already discloses a phosphor for light sources and the associated light source. A garnet of structure A 3 B 5 O 12 is used as the phosphor, the host lattice of which is the first component A and consists of at least one of the rare earth metals Y, Lu, Sc, La, Gd or Sm. Furthermore, one of the elements Al, Ca or In is used for the second component B. Only Ce is used as the dopant.

Aus der WO 97/50132 ist ein sehr ähnlicher Leuchtstoff bekannt. Als Dotierstoff wird dort entweder Ce oder Tb eingesetzt. Während Ce im gelben Spektralbereich emit­ tiert, liegt die Emission des Tb im grünen Spektralbereich. In beiden Fällen wird das Prinzip der Komplementärfarbe (blau emittierende Lichtquelle und gelb emittieren­ der Leuchtstoff) zur Erzielung einer weißen Lichtfarbe verwendet.A very similar phosphor is known from WO 97/50132. As a dopant either Ce or Tb used there. While Ce emit in the yellow spectral range tb, the emission of the Tb lies in the green spectral range. In both cases Principle of complementary color (blue emitting light source and yellow emitting the phosphor) is used to achieve a white light color.

Schließlich ist in EP-A 124 175 eine Leuchtstofflampe beschrieben, die neben einer Quecksilberfüllung mehrere Leuchtstoffe enthält. Diese werden durch die UV- Strahlung (254 nm) oder auch durch die kurzwellige Strahlung bei 460 nm angeregt. Drei Leuchtstoffe sind so gewählt, daß sie sich zu weiß addieren (Farbmischung). Finally, EP-A 124 175 describes a fluorescent lamp which, in addition to a Mercury filling contains several phosphors. These are due to the UV Radiation (254 nm) or also excited by the short-wave radiation at 460 nm. Three phosphors are selected so that they add up to white (color mixing).  

Darstellung der ErfindungPresentation of the invention

Es ist Aufgabe der vorliegenden Erfindung, einen Leuchtstoff gemäß dem Oberbe­ griff des Anspruchs 1 bereitzustellen, der beständig gegen hohe thermische Bela­ stung ist und sich gut für die Anregung im kurzwelligen sichtbaren Spektralbereich eignet.It is an object of the present invention to provide a phosphor according to the Oberbe handle of claim 1 to provide the resistant to high thermal Bela and is good for excitation in the short-wave visible spectral range is suitable.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Besonders vorteilhafte Ausgestaltungen finden sich in den abhängigen Ansprüchen.This object is achieved by the characterizing features of claim 1. Particularly advantageous configurations can be found in the dependent claims.

Erfindungsgemäß wird ein Leuchtstoff für Lichtquellen, deren Emission im kurzwelli­ gen optischen Spektralbereich liegt, verwendet, der eine Granatstruktur A3B5O12 besitzt und der mit Ce dotiert ist, wobei die zweite Komponente B mindestens eines der Elemente Al und Ga repräsentiert, wobei die erste Komponente A Terbium ent­ hält. Überraschenderweise hat sich herausgestellt, daß sich Terbium (Tb) unter be­ sonderen Umständen, nämlich bei blauer Anregung im Bereich 400 bis 500 nm, als wesentlicher Bestandteil des Wirtsgitters (erste Komponente des Granats) für einen gelb emittierenden Leuchtstoff eignet, dessen Dotierstoff Cer ist. Bisher wurde es in diesem Zusammenhang lediglich als Aktivator neben Cer für die Emission im Grü­ nen in Betracht gezogen.According to the invention, a phosphor is used for light sources whose emission is in the short-wave optical spectral range, which has a garnet structure A 3 B 5 O 12 and which is doped with Ce, the second component B representing at least one of the elements Al and Ga, where the first component A contains terbium. Surprisingly, it has been found that terbium (Tb) is suitable under special circumstances, namely with blue excitation in the range 400 to 500 nm, as an essential component of the host lattice (first component of the garnet) for a yellow-emitting phosphor whose dopant is cerium. So far, it has only been considered as an activator in addition to cerium for green emissions.

Dabei kann Terbium als Hauptbestandteil der ersten Komponente A des Granats in Alleinstellung oder zusammen mit mindestens einer der Seltenerdmetalle Y, Gd, La u/o Lu verwendet werden.Terbium can be the main component of the first component A of the garnet in Unique or together with at least one of the rare earth metals Y, Gd, La u / o Lu can be used.

Als zweite Komponente wird mindestens eines der Elemente Al oder Ga verwendet. Die zweite Komponente B kann zusätzlich In enthalten. Der Aktivator ist Cer.At least one of the elements Al or Ga is used as the second component. The second component B can additionally contain In. The activator is cerium.

In einer besonders bevorzugten Ausführungsform wird ein Granat der Struktur
(Tb1-x-ySExCey)3(Al, Ga)5O12 verwendet, wobei
SE = Y, Gd, La und/oder Lu;
0 < = x < = 0,5-y;
0 < y < 0,1 gilt. In a particularly preferred embodiment, a garnet has the structure
(Tb 1-xy SE x Ce y ) 3 (Al, Ga) 5 O 12 , where
SE = Y, Gd, La and / or Lu;
0 <= x <= 0.5-y;
0 <y <0.1 applies.

Der Leuchtstoff absorbiert im Bereich 400 bis 500 nm und kann so durch die Strah­ lung einer blauen Lichtquelle, die insbesondere die Strahlungsquelle für eine Lampe oder LED ist, angeregt werden. Gute Ergebnisse wurden mit einer blauen LED er­ zielt, deren Emissionsmaximum bei 430 bis 450 nm lag. Das Maximum der Emissi­ on des Tb-Granat : Ce-Leuchtstoffs liegt bei etwa 550 nm.The phosphor absorbs in the range of 400 to 500 nm and can thus through the beam a blue light source, in particular the radiation source for a lamp or LED is excited. Good results were achieved with a blue LED targets whose emission maximum was 430 to 450 nm. The maximum of the emissi on the Tb garnet: Ce phosphor is around 550 nm.

Dieser Leuchtstoff eignet sich besonders für die Verwendung in einer weißen LED, beruhend auf der Kombination einer blauen LED mit dem Tb-Granat-Leuchtstoff, der durch Absorption eines Teils der Emission der blauen LED angeregt wird und des­ sen Emission die übrig bleibende Strahlung der LED zu weißem Licht ergänzt.This phosphor is particularly suitable for use in a white LED, based on the combination of a blue LED with the Tb garnet phosphor, the is excited by absorption of part of the emission of the blue LED and the This emission supplements the remaining radiation from the LED to white light.

Als blaue LED eignet sich insbesondere eine Ga(In)N-LED, aber auch jeder andere Weg zur Erzeugung einer blauen LED mit einer Emission im Bereich 400 bis 500 nm. Insbesondere wird als hauptsächlicher Emissionsbereich 430 bis 450 nm emp­ fohlen, da dann die Effizienz am höchsten ist.A Ga (In) N LED is particularly suitable as a blue LED, but also any other Way to generate a blue LED with an emission in the range 400 to 500 nm. In particular, the main emission range is 430 to 450 nm foal, because then the efficiency is highest.

Durch die Wahl von Art und Menge an Seltenerdmetallen ist eine Feineinstellung der Lage der Absorptions- und der Emissionsbande möglich, ähnlich wie dies für andere Leuchtstoffe des Typs YAG : Ce aus der Literatur bekannt ist. In Verbindung mit Leuchtdioden eignet sich vor allem ein Bereich für x, der zwischen 0,25 ≦ x ≦ 0,5-y liegt.By choosing the type and amount of rare earth metals is a fine adjustment the position of the absorption and the emission band possible, similar to this for other phosphors of the type YAG: Ce are known from the literature. In connection With LEDs, a range for x that is between 0.25 ≦ x ≦ is particularly suitable 0.5-y lies.

Der bevorzugte Bereich von y liegt bei 0,02 < y < 0,06.The preferred range of y is 0.02 <y <0.06.

Der erfindungsgemäße Leuchtstoff eignet sich auch zur Kombination mit anderen Leuchtstoffen.The phosphor according to the invention is also suitable for combination with others Phosphors.

Figurencharacters

Im folgenden soll die Erfindung anhand mehrerer Ausführungsbeispiele näher erläutert werden. Es zeigen:In the following, the invention is to be illustrated using several exemplary embodiments are explained in more detail. Show it:

Fig. 1 ein Emissionsspektrum eines Tb-Granat-Leuchtstoffs; Fig. 1 shows an emission spectrum of a Tb-garnet phosphor;

Fig. 2 ein Remissionsspektrum eines Tb-Granat-Leuchtstoffs. Fig. 2 shows a reflectance spectrum of a Tb-garnet phosphor.

Beschreibung eines AusführungsbeispielsDescription of an embodiment

Ein Ausführungsbeispiel der Erfindung ist im folgenden dargelegt. Die Komponenten
9,82 g Yttriumoxid Y2O3
2,07 g Ceroxid CeO2
37,57 g Terbiumoxid Tb4O7
26,41 g Aluminiumoxid Al2O3
0,15 g Bariumfluorid BaF2
0,077 g Borsäure H3BO3
werden vermischt und in einer 250-ml-Polyethylen-Weithalsflasche mit 150 g Alumi­ niumoxidkugeln von 10 mm Durchmesser zwei Stunden lang zusammen vermahlen. Dabei dienen Bariumfluorid und Borsäure als Flußmittel. Die Mischung wird in einem bedeckten Korundtiegel für drei Std. bei 1550°C in Formiergas (Stickstoff mit 2,3 Vol.-% Wasserstoff) geglüht. Das Glühgut wird in einer automatischen Mörsermühle gemahlen und durch ein Sieb von 53 µm Maschenweite gesiebt. Anschließend er­ folgt eine zweite Glühung für drei Std. bei 1500°C in Formiergas (Stickstoff mit 0,5 Vol.-% Wasserstoff). Danach wird wie nach der ersten Glühung gemahlen und ge­ siebt. Der erhaltene Leuchtstoff entspricht der Zusammensetzung (Y0,29Tb0,67Ce0,04)3Al5O12. Er weist eine kräftig gelbe Körperfarbe auf. Ein Emissions­ spektrum dieses Leuchtstoffs bei Anregung mit 430 nm und ein Remissionsspek­ trum des Gesamtsystems sind in Fig. 1 und 2 wiedergegeben.An embodiment of the invention is set out below. The components
9.82 g yttrium oxide Y 2 O 3
2.07 g cerium oxide CeO 2
37.57 g terbium oxide Tb 4 O 7
26.41 g aluminum oxide Al 2 O 3
0.15 g barium fluoride BaF 2
0.077 g boric acid H 3 BO 3
are mixed and ground together in a 250 ml wide-mouth polyethylene bottle with 150 g aluminum oxide balls of 10 mm diameter for two hours. Barium fluoride and boric acid serve as fluxes. The mixture is annealed in a covered corundum crucible for three hours at 1550 ° C. in forming gas (nitrogen with 2.3% by volume hydrogen). The annealing material is ground in an automatic mortar mill and sieved through a sieve with a mesh size of 53 µm. This is followed by a second annealing for three hours at 1500 ° C in forming gas (nitrogen with 0.5 vol.% Hydrogen). Then it is ground and sieved as after the first annealing. The phosphor obtained corresponds to the composition (Y 0.29 Tb 0.67 Ce 0.04 ) 3 Al 5 O 12 . He has a strong yellow body color. An emission spectrum of this phosphor when excited at 430 nm and a reflectance spectrum of the overall system are shown in FIGS. 1 and 2.

Beim Einsatz als Leuchtstoff in einer weißen LED zusammen mit GaInN wird ein Aufbau ähnlich wie in WO 97/50132 beschrieben verwendet. Die Remission ist in Fig. 2 gezeigt.When used as a phosphor in a white LED together with GaInN, a structure similar to that described in WO 97/50132 is used. The remission is shown in FIG. 2.

Claims (10)

1. Leuchtstoff für die Anregung durch eine Strahlungsquelle, deren Emission im kurz­ welligen optischen Spektralbereich liegt, mit einer Granatstruktur A3B5O12, der mit Ce dotiert ist, wobei die zweite Komponente B mindestens eines der Elemente Al und Ga repräsentiert, dadurch gekennzeichnet, daß die erste Komponente A Terbi­ um enthält.1. phosphor for excitation by a radiation source, the emission of which lies in the short-waved optical spectral range, with a garnet structure A 3 B 5 O 12 , which is doped with Ce, the second component B representing at least one of the elements Al and Ga, thereby characterized in that the first component A contains Terbi um. 2. Leuchtstoff nach Anspruch 1, dadurch gekennzeichnet, daß die erste Komponente A überwiegend oder allein durch Terbium gebildet ist.2. Phosphor according to claim 1, characterized in that the first component A is predominantly or solely formed by terbium. 3. Leuchtstoff nach Anspruch 1, dadurch gekennzeichnet, daß der Leuchtstoff durch eine Strahlung im Bereich 400 bis 500 nm, insbesondere 430 bis 450 nm, anregbar ist.3. phosphor according to claim 1, characterized in that the phosphor by radiation in the range from 400 to 500 nm, in particular 430 to 450 nm, can be excited is. 4. Leuchtstoff nach Anspruch 1, dadurch gekennzeichnet, daß die erste Komponente neben Tb Anteile von Y, Gd, La u/o Lu verwendet.4. Phosphor according to claim 1, characterized in that the first component in addition to Tb shares of Y, Gd, La u / o Lu used. 5. Leuchtstoff nach Anspruch 1, dadurch gekennzeichnet, daß ein Granat der Struktur
(Tb1-x-ySExCey)3(Al, Ga)5O12 verwendet, wobei
SE = Y, Gd, La und/oder Lu;
0 < = x < = 0,5-y;
0 < y < 0,1 gilt.5. Phosphor according to claim 1, characterized in that a garnet of the structure
(Tb 1-xy SE x Ce y ) 3 (Al, Ga) 5 O 12 , where
SE = Y, Gd, La and / or Lu;
0 <= x <= 0.5-y;
0 <y <0.1 applies. 6. Leuchtstoff nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Komponente B zusätzlich In enthält.6. Phosphor according to claim 1, characterized in that the second component B also contains In. 7. Lichtquelle, die primär Strahlung im kurzwelligen Bereich des optischen Spektralbe­ reichs emittiert, wobei diese Strahlung teilweise oder vollständig mittels eines Leuchtstoffs nach einem der vorhergehenden Ansprüche in längerwellige Strahlung konvertiert wird. 7. Light source, the primary radiation in the short-wave region of the optical spectrum emitted, this radiation partly or completely by means of a Phosphor according to one of the preceding claims in longer-wave radiation is converted.   8. Lichtquelle nach Anspruch 7, dadurch gekennzeichnet, daß die primär emittierte Strahlung im Wellenlängenbereich 400 bis 500 nm, insbesondere 430 bis 450 nm, liegt.8. Light source according to claim 7, characterized in that the primary emitted Radiation in the wavelength range 400 to 500 nm, in particular 430 to 450 nm, lies. 9. Lichtquelle nach Anspruch 7, dadurch gekennzeichnet, daß als primäre Strahlungs­ quelle eine blau emittierende Leuchtdiode, insbesondere auf Basis von Ga(In)N, verwendet wird.9. Light source according to claim 7, characterized in that as the primary radiation swell a blue emitting light-emitting diode, in particular based on Ga (In) N, is used. 10. Verfahren zur Herstellung eines Leuchtstoffs gemäß einem der Ansprüche 1 bis 6, gekennzeichnet durch folgende Verfahrensschritte:
  • a) Vermahlen der Oxide und Zugabe eines Flußmittels;
  • b) Erstes Glühen in Formiergas;
  • c) Mahlen und Sieben;
  • d) Zweites Glühen.
10. A method for producing a phosphor according to one of claims 1 to 6, characterized by the following method steps:
  • a) grinding the oxides and adding a flux;
  • b) first annealing in forming gas;
  • c) grinding and sieving;
  • d) Second glow.
DE19934126A 1999-07-23 1999-07-23 Fluorescent oxide for forming white LEDs, includes cerium-activated garnet-based oxide with terbium addition Withdrawn DE19934126A1 (en)

Priority Applications (34)

Application Number Priority Date Filing Date Title
DE19934126A DE19934126A1 (en) 1999-07-23 1999-07-23 Fluorescent oxide for forming white LEDs, includes cerium-activated garnet-based oxide with terbium addition
JP2001513209A JP2003505582A (en) 1999-07-23 2000-07-08 Light emitting material for light source and light source having light emitting material
PCT/DE2000/002241 WO2001008452A1 (en) 1999-07-23 2000-07-08 Luminous substance for a light source and light source associated therewith
CN200610101855.9A CN1900217A (en) 1999-07-23 2000-07-08 Luminescent substance for light sources and corresponding light sources
US09/787,208 US6669866B1 (en) 1999-07-23 2000-07-08 Luminous substance for a light source and light source associates therewith
DE50004145T DE50004145D1 (en) 1999-07-23 2000-07-08 FLUORESCENT FOR LIGHT SOURCES AND RELATED LIGHT SOURCES
CNB2004100817860A CN100344728C (en) 1999-07-23 2000-07-08 Phosphor for light sources and associated light source
CA2345114A CA2345114C (en) 1999-07-23 2000-07-08 Phosphor for light sources and associated light source
AT00956080T ATE252814T1 (en) 1999-07-23 2000-07-08 FLUORESCENT FOR LIGHT SOURCES AND ASSOCIATED LIGHT SOURCE
EP03021392A EP1378556A3 (en) 1999-07-23 2000-07-08 Luminescent substance for light sources and corresponding light sources
KR10-2001-7003757A KR100431398B1 (en) 1999-07-23 2000-07-08 Luminous substance for a light source and light source associated therewith
HU0103863A HU228953B1 (en) 1999-07-23 2000-07-08 Luminous substance for a light source and light source associated therewith
DE20023590U DE20023590U1 (en) 1999-07-23 2000-07-08 Phosphor for light sources and associated light source
EP00956080A EP1116418B2 (en) 1999-07-23 2000-07-08 Luminous substance for a light source and light source associated therewith
CNB008014949A CN1190997C (en) 1999-07-23 2000-07-08 Luminous substance for light source and light source associated therewith
TW89114631A TW539737B (en) 1999-07-23 2000-07-21 Luminescent material for light source and said light source
JP2001513210A JP3825318B2 (en) 1999-07-23 2000-07-24 Luminescent substance device, wavelength conversion injection molding material and light source
AU72675/00A AU7267500A (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
DE50016032T DE50016032D1 (en) 1999-07-23 2000-07-24 Light source with a phosphor arrangement and potting compound with a phosphor arrangement
CNB008014957A CN100334746C (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
DE50008093T DE50008093D1 (en) 1999-07-23 2000-07-24 FLUORESCENT ARRANGEMENT WAVELENGTH-CONVERSION POWDERING AND LIGHT SOURCE
US09/786,086 US7132786B1 (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
PCT/DE2000/002405 WO2001008453A1 (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
CA2343909A CA2343909C (en) 1999-07-23 2000-07-24 Arrangement of luminescent materials, wavelength-converting casting compound and light source
EP00960304A EP1116419B1 (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
KR10-2001-7003756A KR100450647B1 (en) 1999-07-23 2000-07-24 Luminescent array, wavelength-converting sealing material and light source
AT00960304T ATE279089T1 (en) 1999-07-23 2000-07-24 FLUORESCENT ARRANGEMENT WAVELENGTH-CONVERTING CASTING COMPOUND AND LIGHT SOURCE
EP04018028A EP1471775B9 (en) 1999-07-23 2000-07-24 Light source with an arrangement of a luminescent substance and mouldable material with an arrangement of a luminescent substance
US10/687,436 US7115217B2 (en) 1999-07-23 2003-10-16 Phosphor for light sources and associated light source
US10/840,575 US6998771B2 (en) 1999-07-23 2004-05-06 Arrangement of luminescent materials, wavelength-converting casting compound and light source
JP2004341109A JP4639351B2 (en) 1999-07-23 2004-11-25 Wavelength conversion injection molding material
US11/066,671 US7063807B2 (en) 1999-07-23 2005-02-25 Phosphor for light sources and associated light source
US11/296,673 US7261837B2 (en) 1999-07-23 2005-12-07 Arrangement of luminescent materials, wavelength-converting casting compound and light source
US11/359,267 US20060138388A1 (en) 1999-07-23 2006-02-22 Phosphor for light sources and associated light source

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US8133461B2 (en) 2006-10-20 2012-03-13 Intematix Corporation Nano-YAG:Ce phosphor compositions and their methods of preparation
US9023242B2 (en) 2006-10-20 2015-05-05 Intematix Corporation Green-emitting, garnet-based phosphors in general and backlighting applications
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US8414796B2 (en) 2006-10-20 2013-04-09 Intematix Corporation Nano-YAG:Ce phosphor compositions and their methods of preparation
US8475683B2 (en) 2006-10-20 2013-07-02 Intematix Corporation Yellow-green to yellow-emitting phosphors based on halogenated-aluminates
US8529791B2 (en) 2006-10-20 2013-09-10 Intematix Corporation Green-emitting, garnet-based phosphors in general and backlighting applications
US8877094B2 (en) 2006-10-20 2014-11-04 Intematix Corporation Yellow-green to yellow-emitting phosphors based on halogenated-aluminates
EP2082430A4 (en) * 2006-10-20 2011-05-25 Intematix Corp Nano-yag:ce phosphor compositions and their methods of preparation
US9120975B2 (en) 2006-10-20 2015-09-01 Intematix Corporation Yellow-green to yellow-emitting phosphors based on terbium-containing aluminates
US9359550B2 (en) 2006-10-20 2016-06-07 Intematix Corporation Yellow-green to yellow-emitting phosphors based on halogenated-aluminates
US9428690B2 (en) 2006-10-20 2016-08-30 Intematix Corporation Yellow-green to yellow-emitting phosphors based on terbium-containing aluminates
US9458378B2 (en) 2006-10-20 2016-10-04 Intermatix Corporation Green-emitting, garnet-based phosphors in general and backlighting applications
US10190047B2 (en) 2006-10-20 2019-01-29 Intematix Corporation Green-emitting, garnet-based phosphors in general and backlighting applications
DE102018222185A1 (en) * 2018-12-18 2020-06-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and device for recycling LED components from old lamp mixtures and use of the device

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