| abstract |
The present invention provides an LYSN phosphor having an emission peak in a long wavelength region, a high emission luminance, and a high temperature retention rate. The present invention relates to a phosphor containing a tetragonal crystal phase, wherein the crystal phase contains M element, La element, Si element, N element, and also satisfies a specific formula and the lattice constant a is 10.104 Å or more, 10 < / RTI > or less. |