OXIDE PHOSPHOR, LIGHT-EMITTING DEVICE AND METHOD FOR PRODUCING OXIDE PHOSPHOR

• Main Author: MURASAKI YOSHINORI
• Format: Patent
• Language: English; Japanese
• Published: 14.05.2024
• 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 phosphor having an emission peak in a wavelength range from red light to far-red light.SOLUTION: An oxide phosphor has a composition represented by formula (1). (Li1-uM1u)4(Ge1-vM2v)wOx: Cry, M3z (1) (in formula (1), M1 is at least one element selected from the group consisting of Na, K, Rb and Cs, M2 is at least one element selected from the group consisting of Si, Ti, Zr, Sn and Hf, M3 is at least one element selected from the group consisting of Ni, Eu, Fe, Mn, Nd, Tm, Ho, Er and Yb, and u, v, w, x, y and z each satisfy 0≤u≤0.3, 0≤v≤0.5, 3.5≤w≤15, 9≤x≤32, 0.005≤y≤1.0, 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を有する酸化物蛍光体を提供する。【解決手段】下記式（１）で表される組成を有する、酸化物蛍光体。（Ｌｉ１－ｕＭ１ｕ）４（Ｇｅ１－ｖＭ２ｖ）ｗＯｘ：Ｃｒｙ，Ｍ３ｚ（１）（前記式（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、Ｓｉ、Ｔｉ、Ｚｒ、Ｓｎ及びＨｆ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、Ｎｉ、Ｅｕ、Ｆｅ、Ｍｎ、Ｎｄ、Ｔｍ、Ｈｏ、Ｅｒ及びＹｂ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、ｕ、ｖ、ｗ、ｘ、ｙ及びｚは、それぞれ０≦ｕ≦０．３、０≦ｖ≦０．５、３．５≦ｗ≦１５、９≦ｘ≦３２、０．００５≦ｙ≦１．０、０≦ｚ≦０．５を満たす。）【選択図】図４