| 摘要 |
<p>The present invention relates to a nitride based red fluorescent material denoted by chemical formula 1, which emits red or yellow red color light caused by near ultraviolet rays or light in a blue color area and has an improved light-emitting efficiency of light, thereby leading to a good brightness and maintaining light-emitting efficiency of light under harsh conditions like high temperatures and humidity where a white light apparatus with the fluorescent material has a brightness better than that of an existing apparatus and emits white light of warm colors, thereby comprising an outstanding color rendering, color gamut and color-controlling property. In chemical formula 1, A_2Si_5O_xN_yLi_aF_b:zM^2+, A, M, x, y, z, a and b are described as the same in the patent specification.</p> |
