OXYNITRIDE ORANGE-RED FLUORESCENT SUBSTANCE AND LIGHT-EMITTING FILM OR LIGHT-EMITTING SHEET AND LIGHT-EMITTING DEVICE COMPRISING SAME

摘要

An oxynitride orange-red fluorescent substance and a light-emitting film or sheet and a light-emitting device comprising the same are disclosed. The chemical formula of the oxynitride orange-red fluorescent substance is M m A a Si x N y O z : dR in which the element M is one or more of the elements Ca, Sr and Ba, the element A is Al or a mixture of Al with one or more of the elements Ga, La, Sc and Y, the element R is one or more of the elements Ce, Eu and Mn, and chemical formula meets 0.8‰¤m‰¤ 1.2, 1 a1.7, 1 x1.7, 3y4.2, 0z0.7, and 0.001 ‰¤d‰¤0.2. The oxynitride orange-red fluorescent substance can emit orange-red light under the excitation of a radiation source, and with a relatively high luminous efficiency, the oxynitride orange-red fluorescent substance meets the demands for high color rendering performance and low color temperature of a white LED.