| 简介 |
PROBLEM TO BE SOLVED : To provide a phosphor which gives a light-emitting device having improved light-emitting properties for practical purposes.
SOLUTION : A composite oxide for phosphors is represented by formula (1), aM1O-bM22O3-cM32O-dMoO3 or formula (2), M12M23M33Mo8O32 (wherein M1 is Ba, Sr, Ca, Mg or Zn; M2 is Al, Sc, Ga, Y, In, La, Ga, Tm or Lu; M3 is Li, Na, K, Rb or Cs; a is in the range of 1-3; b is in the range of 1-2; c is in the range of 1-2; and d is in the range of 7-9). The phosphor is obtained by incorporating M4 as an activating agent into the above composite oxide for phosphors. The phosphor is obtained by substituting part of M2 or the entire M2 in the above composite oxide for phosphors with M4 (wherein M4 is one or more kinds selected from the group consisting of a rare earth element, Mn, and Bi).
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