| abstract |
A phosphor of which emission wavelength can be optionally set in a region with high human visual sensitivity to make it possible to enhance luminance in the region, and which has an excitation band for light in a wavelength region emitted from the aforesaid light emitting portion, a production method of the same, illumination and an LED using the aforesaid phosphor are provided. As raw materials, for example, Ca 3 N 2 , CaO, Al 2 O 3 , AIN, Si 3 N 4 , and SiO 2 an Eu 2 O 3 are prepared, and each of the raw material is weighed so that a mole ratio of each element is, for example, (Ca, Eu) : Al: Si=1 : 1 : 1, mixed and prepared under a nitrogen atmosphere, fired at 1500°C under the nitrogen atmosphere to obtain a main production phase of a phosphor expressed by CaAlSiN 3 :Eu, and by controlling a compounding amount of each raw material at the time of raw material preparation, the oxygen concentration in the constitution of the production phase and mol concentration of Eu doping are controlled to optionally set the emission wavelength of the production phase. |