| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxynitride phosphor which emits green light, the oxynitride phosphor capable of excitation by excitation light from violet to blue and emitting green light, particularly provide an oxynitride phosphor powder activated by Tb, showing green light emission of a shorter wavelength than conventional light emission wavelengths.SOLUTION: This invention relates to an oxynitride phosphor powder comprising α type sialon represented by composition formula: CaTbCeSiAlON(where 0.0<x1≤1.8, 0.000<x2+x3<0.200, 0.00<x2/x3≤80.00, 1.0<y≤4.0, 0.0≤z≤2.0). |
