METHOD FOR PRODUCING PHOSPHOR FOR DISPERSION-TYPE EL DEVICES

摘要

A phosphor for dispersion-type EL devices, which enables the achievement of high luminance and high luminous efficiency, is produced by simple steps only. A method for producing a phosphor for dispersion-type EL devices according to the present invention comprises at least: a first firing step (step S2) wherein base particles are fired; a first impregnation step (step S4) wherein the base particles after the first firing step are impregnated with an activator or a coactivator; a second impregnation step (step S8) wherein the base particles after the first impregnation step are impregnated with a coactivator or an activator; a final firing step (step S9) wherein the base particles after the second impregnation step are fired; and a cleaning step (step S10) wherein the base particles after the final firing step are cleaned.