| abstract |
The present invention relates to a phosphor, and more specifically, a composite crystal phosphor having high light emission characteristics and excellent thermal and chemical stability, and a light emitting device, a surface light source device, a display device, and the like using the same The present invention relates to a lighting device. According to one aspect of the present invention, an inorganic composition containing at least an M element, an Al element, silicon, oxygen, and nitrogen, and the inorganic composition includes particles having at least two crystal phases. And the at least two crystal phases include a first crystal phase identical to the M 2 SiO 4 crystal and a second crystal phase that is a β-sialon crystal. To do. Here, M may be at least one element selected from the group consisting of Mg, Ca, Sr, and Ba. [Selection] Figure 3 |