OXIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE

• Main Author: MURASAKI YOSHINORI
• Format: Patent
• Language: English; Japanese
• Published: 09.06.2023
• 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

To provide an oxide fluorescent material that has a light emission peak wavelength in a wavelength range from red light to near infrared light.SOLUTION: An oxide fluorescent material has a composition encompassed in a compositional formula represented by the following formula (1): (Li1-tM1t)u(Ga1-vM2v)5Ow: Crx, Niy, M3z (1) wherein in formula (1), M1 represents at least one element selected from the group consisting of Na, K, Rb, and Cs; M2 represents at least one element selected from the group consisting of B, Al, Sc, In, and rare earth elements; M3 represents at least one element selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Bi, V, Nb, and Ta; and t, u, v, w, x, y, and z respectively satisfy 0≤t≤1.0, 0.7≤u≤1.6, 0≤v<1.0, 7.85≤w≤11.5, 0.05≤x≤1.2, 0≤y≤0.5, 0.25<x+y≤1.2, y<x, and 0≤z≤0.5.SELECTED DRAWING: Figure 4 【課題】赤色光から近赤外光の波長範囲に発光ピーク波長を有する酸化物蛍光体を提供する。【解決手段】酸化物蛍光体は、下記式（１）で表される組成式に含まれる組成を有する。 （Ｌｉ１－ｔＭ１ｔ）ｕ（Ｇａ１－ｖＭ２ｖ）５Ｏｗ：Ｃｒｘ，Ｎｉｙ，Ｍ３ｚ（１）（式（１）中、Ｍ１は、Ｎａ、Ｋ、Ｒｂ及びＣｓからなる群から選択される少なくとも１種の元素であり、Ｍ２は、Ｂ、Ａｌ、Ｓｃ、Ｉｎ及び希土類元素からなる群から選択される少なくとも１種の元素であり、Ｍ３は、Ｓｉ、Ｇｅ、Ｓｎ、Ｔｉ、Ｚｒ、Ｈｆ、Ｂｉ、Ｖ、Ｎｂ及びＴａからなる群から選択される少なくとも１種の元素であり、ｔ、ｕ、ｖ、ｗ、ｘ、ｙ及びｚは、それぞれ０≦ｔ≦１．０、０．７≦ｕ≦１．６、０≦ｖ＜１．０、７．８５≦ｗ≦１１．５、０．０５≦ｘ≦１．２、０≦ｙ≦０．５、０．２５＜ｘ＋ｙ≦１．２、ｙ＜ｘ、０≦ｚ≦０．５を満たす。）【選択図】図４