OXIDE PHOSPHOR AND LIGHT EMITTING DEVICE PREPARED THEREWITH

• Main Authors: FUKUDA KOICHI, TANAKA MAKI, AMAYA HITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 06.04.2017
• 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

PROBLEM TO BE SOLVED: To provide an oxide phosphor having improved external quantum efficiency compared to the conventional art and a light emitting device prepared therewith.SOLUTION: The present invention provides an oxide phosphor comprising a crystal phase represented by a composition of the following formula (1): SrMEuLuSiO(where, M is at least one metal element selected from the group consisting of Ca, Ba and Mg, 2.5≤a+b+c+d≤3.5, 0<c≤0.5, 0<d≤0.5, 0.9≤e≤1.1, 4.5≤f≤5.5).SELECTED DRAWING: None 【課題】従来よりも外部量子効率が向上された酸化物蛍光体及びそれを用いた発光装置を提供する。【解決手段】下記式（１）の組成で表される結晶相を含む酸化物蛍光体である。ＳｒａＭｂＥｕｃＬｕｄＳｉｅＯｆ・・・（１）（ここで、ＭはＣａ，Ｂａ及びＭｇからなる群より選ばれる１種以上の金属元素であり、２．５≦ａ＋ｂ＋ｃ＋ｄ≦３．５、０＜ｃ≦０．５、０＜ｄ≦０．５、０．９≦ｅ≦１．１、４．５≦ｆ≦５．５である。）【選択図】なし