| abstract |
The present application provides an oxynitride orange-red fluorescent material, including a luminescent film or luminescent sheet thereof and a light emitting device. The chemical formula of the oxynitride orange-red fluorescent substance is MmAaSixNyOz:dR, wherein the M element is one or more elements of Ca, Sr or Ba; the A element is one of Al or Al and Ga, La, Sc or Y Or a mixture of one or more elements; the R element is one or more elements of Ce, Eu or Mn; and the above chemical formula satisfies 0.8≦m≦1.2, 1<a<1.7, 1<x<1.7, 3<y<4.2 , 0 < z < 0.7, 0.001 ≦ d ≦ 0.2. The oxynitride orange-red fluorescent material provided by the invention can emit orange-red light under the excitation of the radiation source, and the fluorescent material has good luminous efficiency and can satisfy high color rendering and low color. The need for color temperature white LEDs. |