Method for producing a ceramic converter element, ceramic converter element, and optoelectronic component
AssigneeOSRAM Opto Semiconductors GmbH
InventorsZhengbo Yu, Madis Raukas, John F. Kelso
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Abstract
A method for producing a ceramic converter element is provided. The method includes providing a phosphor as a starting material, mixing the phosphor and at least one metal oxide powder to form a mixture, and processing the mixture to form a ceramic converter material in which the phosphor is embedded in a ceramic matrix. Further, an optoelectronic component with a ceramic converter element and a ceramic converter element are provided.
Claims18
A method for producing a ceramic converter element, the method comprising:
- providing a phosphor as a starting material, the phosphor comprising a doped garnet;
- mixing the phosphor and at least one metal oxide powder to form a mixture;
- and
- processing the mixture to form a ceramic converter material in which the phosphor is embedded in a ceramic matrix material,
- wherein the doped garnet comprises Y3Al5O12:Ln and the metal oxide powder comprises Y3Al5O12 or Y3Al5O12 and Al2O3, or
- wherein the doped garnet comprises Lu3Al5O12:Ln and the metal oxide powder comprises Lu3Al5O12 or Lu3Al5O12 and Al2O3, and
- wherein Ln is chosen from at least one of Ce, Gd, Pr or Eu.
A method for producing a ceramic converter element, the method comprising:
- providing a phosphor as a starting material, the phosphor comprising a doped garnet;
- mixing the phosphor and at least one metal oxide powder to form a mixture;
- and
- processing the mixture to form a ceramic converter material in which the phosphor is embedded in a ceramic matrix material,
- wherein the doped garnet comprises Y Al5O12:Ln and the metal oxide powder comprises Y3Al5O12 or Y3Al5O12 and Al2O3, or
- wherein the doped garnet comprises Lu3Al5O12:Ln and the metal oxide powder comprises Lu3Al5O12 or Lu3Al5O12 and Al2O3,
- wherein the phosphor is a pre-synthesized phosphor with a cubic crystal phase with no second phases, and
- wherein Ln is chosen from at least one of Ce, Gd, Pr or Eu.
A method for producing a ceramic converter element, the method comprising:
- providing a phosphor as a starting material, the phosphor comprising a doped garnet;
- mixing the phosphor and at least one metal oxide powder to form a mixture;
- and
- processing the mixture to form a ceramic converter material in which the phosphor is embedded in a ceramic matrix material, and
- wherein the doped garnet comprises Y3Al5O12:Ln and the metal oxide powder comprises Y3Al5O12 or Y3Al5O12 and Al2O3, or
- wherein the doped garnet comprises Lu3Al5O12:Ln and the metal oxide powder comprises Lu3Al5O12 or Lu3Al5O12 and Al2O3,
- wherein Ln is selected from at least one of Ce, Gd, Pr, and Eu, and
- wherein processing comprises:
- adding at least one additive to the mixture to form a slurry,
- tape casting the slurry to form a green part, and
- prefiring and/or debinding and sintering the green part to form the ceramic converter material.
Dependencies are inferred from the claim text.