Fluoride phosphor, light emitting device and method for producing fluoride phosphor

摘要

An A ₂ SiF ₆ : Mn phosphor having high fluorescence intensity and reliability, a high-intensity light emitting device using the phosphor, and a method for producing the phosphor are provided. A method for producing a fluoride phosphor represented by a general formula: A ₂ SiF ₆ : Mn (element A is an alkali metal element containing at least potassium), wherein element A and fluorine are dissolved in a solvent. Including a step of preparing an aqueous solution and a step of adding a manganese compound that supplies solid silicon dioxide and manganese other than +7 to the aqueous solution, and the amount of manganese compound added is such that the Mn content in the fluoride phosphor is It is the range which becomes 0.1 mass% or more and 1.5 mass% or less, and fluoride fluorescent substance precipitates in parallel with a silicon dioxide melt | dissolving in aqueous solution. [Selection] Figure 1