| abstract |
A fluorescent powder and a light emitting device. The phosphor powder includes a composition of the formula A3-aCeaQ5-eEeO12. The A, Q, and E elements independently include aluminum (Al), gallium (Ga), indium (In), strontium (Sc), ytterbium (Y), lanthanum (La), yttrium (Gd), yttrium (Tb), A Lu element or a combination of the above. Ce is a bismuth element. O is an oxygen element. 0<a□3.0□e□5. The phosphor powder has a particle size distribution (Span) of less than 0.7. |