Wavelength-converting casting composition and light-emitting semiconductor component
AssigneeOsram Opto Semiconductors GmbH & Co. OHG
InventorsKlaus Höhn, Alexandra Debray, Peter Schlotter, Ralf Schmidt, Jürgen Schneider
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Abstract
The wavelength-converting casting composition is based on a transparent epoxy casting resin with a luminous substance admixed. The composition is used in an electroluminescent component having a body that emits ultraviolet, blue or green light. An inorganic luminous substance pigment powder with luminous substance pigments is dispersed in the transparent epoxy casting resin. The luminous substance is a powder of Ce-doped phosphors and the luminous substance pigments have particle sizes ≦20 μm and a mean grain diameter d50≦5 μm.
Claims16
A wavelength-converting casting composition, for converting a wavelength of ultraviolet, blue or green light emitted by an electroluminescent component, comprising:
- a transparent epoxy casting resin;
- an inorganic luminous substance pigment powder dispersed in said transparent resin, said pigment powder comprising luminous substance pigments from Ce-doped phosphors;
- and
- said luminous substance pigments having grain sizes ≦20 μm and a mean grain diameter d50≦5 μm.
A light-emitting semiconductor component, comprising:
- a semiconductor body formed of a semiconductor layer sequence and being capable, during an operation of the semiconductor component, of emitting electromagnetic radiation in at least one of an ultraviolet, blue, and green spectral range;
- a wavelength-converting casting composition disposed in a vicinity of said semiconductor body, said casting composition being formed of a transparent epoxy casting resin and an inorganic luminous substance pigment powder dispersed in said transparent resin, said pigment powder comprising first luminous substance pigments from Ce-doped phosphors and having grain sizes ≦20 μm and a mean grain diameter d50≦5 μm;
- said luminous substance pigments converting a portion of the radiation originating from the at least one of the ultraviolet, blue and green spectral range into radiation of a higher wavelength, such that the semiconductor component emits mixed radiation including the higher-wavelength radiation and radiation from the at least one of the ultraviolet, blue and green spectral range.
Dependencies are inferred from the claim text.