Oxynitide phosphor and production process thereof, and light-emitting device using oxynitride phosphor

A process for production of an oxynitride phosphor comprising;

• a first step of mixing raw materials containing the nitride of L (L is at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, the nitride of M (M is at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf), the oxide of M, and the oxide of R (R are one or more rare earth elements), and
• a second step of firing the mixture obtained in said first step.

A light-emitting device comprising;

• an excitation light source and a phosphor converting the wavelength of at least the portion of light from said excitation light source,
• wherein an oxynitride phosphor having the luminescence peak wavelength at a blue green to yellow region is contained in said phosphor, said oxynitride phosphor having a crystal structure of the orthorhombic system.