METHOD FOR TREATING SURFACE OF PHOSPHOR, PHOSPHOR, LIGHT-EMITTING DEVICE, AND ILLUMINATION DEVICE

• Main Authors: NONOGAKI, Ryozo, TAKEDA, Go
• Format: Patent
• Language: English; French; German
• Published: 06.09.2017
• Subjects: ADHESIVES; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CRYSTAL GROWTH; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SEMICONDUCTOR DEVICES; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

Provided are a method for treating the surface of a (Sr,Ca)AlSiN 3 nitride phosphor that can improve the moisture-resistance reliability thereof without deterioration in optical properties, a phosphor, a light-emitting device, and an illumination device. The surface of a phosphor is treated in an immersion step of immersing a phosphor of which the host crystal has a crystal structure substantially identical with that of (Sr,Ca)AlSiN 3 crystal in an aqueous ammonium phosphate-containing solution (Step 1) and a heat-treating step of leaving the phosphor after the immersion step in an environment at a temperature of 250 to 550°C for 2 to 24 hours (Step 2).