| 简介 |
[Problem]We provide a method for producing nitride phosphors that can exhibit high luminescence intensity. [Solution means] A compound containing at least one rare earth element selected from the group consisting of Y, La, Ce, Lu and Gd is heat treated at a temperature within a range of 800 ° C. or more and 1800 ° C. or less to obtain a first heat treatment product having a crystaltron diameter of 150 nm or more, and the first heat treatment material and, if necessary, Y, as a raw material including the first heat treatment material and as necessary. It is a method for producing a nitride phosphor comprising a M source comprising at least one rare earth element M selected from the group consisting of Lu and Gd, a Mixture prepared so that the raw material includes a La source, a Si source, a Ce source, and a preparation composition indicated by the composition formula LawMxSi6Ny : Cez is heat treated at a temperature within a range of 1200 ° C. or more and 1800 ° C. or less. However, in the composition formula, w, x, y and z are 0. 5≦w≦4． 5、0＜x≦1． 5、0≦y≦12、0＜z≦1． 5、0． 15＜(x＋z)＜3． 0、3． 0≦(w＋x＋z)≦7． Meet 5. [Selection Figure]Figure 3 |
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