Patent ID: 8129905

Claim:
A phosphor represented by the general formula aAO.bEuO.DO.cSiO 2 , where A is at least one selected from Ca, Sr and Ba, D is at least one selected from Mg and Zn, and 2.970≦a≦3.500, 0.001≦b≦0.030, and 1.900≦c≦2.100 are satisfied, wherein a peak intensity at 1490 cm −1 is 0.02 to 0.8 when a peak intensity at 565 cm −1 is set to 1 in a spectrum obtained by measurement using photoacoustic spectroscopy, the phosphor being obtained by firing a mixed powder of source materials in a mixed gas atmosphere containing nitrogen and hydrogen at 1100 to 1300° C., and then firing in a mixed gas atmosphere containing carbon dioxide at 700 to 1200° C.