| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluoride fluorescent material having excellent water resistance and a narrow half value width of a luminescence peak.SOLUTION: The method for producing a fluoride fluorescent material having a general formula represented by K[MMnF] (where M is at least one selected from Ti, Zr, Hf, Si, Ge, and Sn; and a is 0<a<0.2) comprises: a step of forming a core of a fluorescent material whose composition is represented by the above general formula, by mixing a first solution containing at least Mn and F, a second solution containing at least K and F, and a third solution containing at least Si and F; and a second step of adding the core of a fluorescent material to the third solution and mixing the same with a solution containing hydrogen peroxide or oxalic acid as a reducing agent and the second solution not containing tetravalent Mn. |
