| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluoride fluophor emitting red color activated with tetravalent Mn and capable of achieving both of Mn activation amount and excellent internal quantum efficiency at high level.SOLUTION: There is provided a fluoride fluophor having a composition represented by the following general formula (I) and internal quantum efficiency of fluorescence of 80% or more. A[MMnF] (I), where A represents at least one kind of cation selected from a group consisting of K, Li, Na, Rb, Csand NH, M represents at least one kind of element selected from a group consisting of IV group element and XIV group element and a represents the number satisfying 0.04<a<0.10.SELECTED DRAWING: None |
