형광체 분말, 발광 장치, 화상 표시 장치 및 조명 장치

• Main Author: EMOTO HIDEYUKI
• Format: Patent
• Language: Korean
• Published: 06.07.2023
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; 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; POLISHES; SEMICONDUCTOR DEVICES

일반식 Mx(Si, Al)2(N, O)3±y(단, M은 Li, 및 1종 이상의 알칼리 토류 금속 원소이며, 0.52≤x≤0.9, 0.06≤y≤0.36)로 나타내어지고, M의 일부가 Ce 원소로 치환되어 있는 형광체이며, Si/Al 원자비가 1.5 이상 6 이하이고, 또한 O/N 원자비가 0 이상 0.1 이하이고, M의 5 내지 50mol％가 Li이며, M의 0.5 내지 10mol％가 Ce인 형광체 입자를 포함하는 형광체 분말. 이 형광체 분말의, 파장 700㎚에 있어서의 광흡수율 A700은, 10％ 이하이다. A phosphor powder including phosphor particles of a phosphor which is represented by a general formula Mx(Si, Al)2(N, O)3±y (where M is Li and one or more alkaline earth metal elements and 0.52≤x≤0.9 and 0.06≤y≤0.36 are satisfied) and in which a part of M is substituted with a Ce element, the phosphor powder includes phosphor particles in which a Si/Al atomic ratio is equal to or more than 1.5 and equal to or less than 6, an O/N atomic ratio is equal to or more than 0 and equal to or less than 0.1, 5 to 50 mol % of M is Li, and 0.5 to 10 mol % of M is Ce. A light absorption A700 of this phosphor powder at a wavelength of 700 nm is equal to or less than 10%.