Phosphor and method for preparing same

A method for preparing a phosphor, the method comprising steps of:

• generating a first mixture by mixing a silicon precursor, an aluminum precursor, and an active material precursor;
• adjusting an oxygen concentration by oxidizing the first mixture;
• and
• sintering the oxidized first mixture in a nitrogen atmosphere, wherein
• the phosphor is represented by Formula 1:
• Si(6-z)AlzOyN(8-z):Rex, [Formula 1]
• where 0.018≦x≦0.3, 0.3≦y≦0.75, 0.42≦z≦1.0, and Re is a rare-earth element.

A method for preparing a phosphor, the method comprising steps of:

• generating a first mixture by mixing silicon oxide, aluminum oxide, and an active material precursor while adjusting an oxygen concentration;
• and
• sintering the first mixture in a nitrogen atmosphere, wherein:
• the phosphor is represented by Formula 1:
• Si(6-z)AlzOyN(8-z):Rex, [Formula 1]
• where 0.018≦x≦0.3, 0.3≦y≦0.75, 0.42≦z≦1.0, and Re is a rare-earth element.