| 摘要 |
A method for producing a fluoride fluorescent material including: preparing a first solution containing manganese, a second solution containing at least one cation selected from the group consisting of K + , Li + , Na + , Rb + , Cs + , and NH 4 + , and a third solution containing at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table, and adding the first and third solutions dropwise, each at a rate of 0.3 % or less of the total volume of the solution per minute to the second solution to obtain particles having a composition represented by formula (I): A 2 [M 1- a Mn 4+ a F 6 ] (I) wherein A denotes at least one cation selected from the group consisting of K + , Li + , Na + , Rb + , Cs + , and NH 4 + ; M denotes at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table; and a satisfies 0.04< a <0.20. |
