FLUORESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE

• Main Authors: NAGAO, Nobuaki, INADA, Yasuhisa, NITTA, Mitsuru
• Format: Patent
• Language: English; French; German
• Published: 31.07.2019
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; BLASTING; CHEMISTRY; DEVICES USING STIMULATED EMISSION; DIAGNOSIS; DYES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS; LIGHTING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PICTORIAL COMMUNICATION, e.g. TELEVISION; POLISHES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SURGERY; WEAPONS

The phosphor according to an aspect of the present disclosure contains a crystal phase having a chemical composition Ce x Y y La 3-x-y Si 6 N 11 , where x and y satisfy 0 < x ‰¤ 0.6, and (1.5 - x) ‰¤ y ‰¤ (3 - x). The phosphor has an emission spectral peak within a wavelength range of 600 nm or more and 660 nm or less and a first excitation spectral peak within a wavelength range of 480 nm or more and 550 nm or less.