| abstract |
The present invention provides a phosphor that emits near-infrared light by irradiating visible light or ultraviolet light. In an embodiment of the present invention, the phosphor contains an inorganic substance, and the inorganic substance contains at least an Eu element and an M[3] element (M[3] is at least one element selected from Al, Y, La, and Gd) , Si element and nitrogen element, if necessary, also contains M[1] element (M[1] is Li element), M[2] element (M[2] is selected from Mg, Ca, Ba and Sr at least one element) and at least one element of oxygen, the phosphor has a maximum value of the emission peak in the wavelength range of 760 nm or more and 850 nm or less when irradiated by an excitation source. |