Red phosphor, method for preparing same, and light-emitting device comprising same

摘要

Provided is a red phosphor having superior thermal and chemical stability and excellent luminous efficiency, wherein the red phosphor comprises a compound expressed in the composition formula: A_z(Sr, M)₂(Si, Al)O_4−xN_y:R(0x3, y=2x/3, 0.001z0.1), where A is at least one element selected from a group consisting of lithium (Li), potassium (K) and sodium (Na), M is at least one element selected from a group consisting of barium (Ba), magnesium (Mg), and calcium (Ca), and R is at least one element selected from a group consisting of lanthanide and a transition metal element.